Convert 8,400 ug/m3 NO to ppm at 1.2 atm and 135°C.
show all working.

It is not recommended to shoot an LPG Solane tank with a 0.45 caliber pistol or any firearm. The tank is pressurized and shooting it could cause it to explode, resulting in serious injury or even death.

When a cylinder tank is in operation, it can sweat due to the tank’s cooling effect, according to a scientific explanation. When propane gas expands and turns into a vapor, it draws heat from the surrounding environment. As a result, the tank becomes colder, causing moisture in the air to condense on the tank's surface, resulting in sweat.The sweating of the propane cylinder tank also indicates that it is well-vented. The vent allows the propane gas to expand without creating excessive pressure in the tank.

A well-vented propane tank also helps to keep the tank cool and prevent the pressure from building up inside the tank, which can cause the tank to burst.

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The expected value of g(X, Y) = XY^2 can be found by calculating the sum of the products of all possible values of X and Y weighted by their joint probabilities. To find the expected value, we can follow these steps:

1. Write down the joint probability distribution for X and Y.

2. Calculate the expected value by summing the products of XY^2 and their corresponding joint probabilities.

3. Simplify and compute the final result.

The joint probability distribution for X and Y is given, but let's assume it is represented in a table or as a function.

We can find the expected value of g(X, Y) = XY^2. This calculation allows us to determine the average value of the function and understand its behavior in the joint probability distribution of X and Y.

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Answer:

(3,2)

Step-by-step explanation:

Use the vertex form, y = a(x−h)²+k, to determine the values of a, h, and k.

a = 1

h = 3

k = 2

Find the vertex (h, k)

(3,2)

So, the vertex is (3,2)

The vertex point of the function f(x) = (x - 3)² + 2 is (3, 2) ⇒ answer B

Any quadratic function represented graphically by a parabola

∵ The function f(x) = (x - 3)² + 2

∵ The f(x) = a(x - h)² + k in the vertex form

∴ a = 1 , h = 3 , k = 2

∵ h , k are the coordinates of the vertex point

∴ The coordinates of the vertex point are (3, 2)

Hence, the vertex point of the function f(x) = (x - 3)² + 2 is (3, 2).

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The volume of added base at the equivalence point for HCl is 14.0 mL.

Given:

Volume of HCl solution = 28.0 mL = 0.0280 L

Concentration of HCl solution = 0.100 M

Molarity of KOH solution = 0.200 M

Calculation of Moles of HCl:

moles of HCl = Molarity × Volume (L)

moles of HCl = 0.100 M × 0.0280 L

moles of HCl = 0.00280 mol

Calculation of Moles of KOH:

moles of KOH = moles of HCl (at equivalence point)

moles of KOH = 0.00280 mol

Calculation of Volume of KOH:

Volume = moles / Molarity

Volume = 0.00280 mol / 0.200 M

Volume = 0.014 L or 14 mL

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Principle of mathematical induction, the statement holds for all integers n ≥ 1 .we have proved that bn = 2n + 1 for each integer n ≥ 1.

Base case

Let's first check if the statement holds for the base case n = 1.

When n = 1, we have b1 = 3. And indeed, 2^1 + 1 = 3. So, the statement holds for the base case.

Inductive step

Assume that the statement holds for some integer k, i.e., assume that bk = 2k + 1.

Now, let's prove that the statement holds for k + 1, i.e., we need to show that b(k+1) = 2(k+1) + 1.

Using the given recursive definition of the sequence, we have:

b(k+1) = 3b(k) - 3b(k-1) - 25(k+1-2)

= 3(2k + 1) - 3(2(k-1) + 1) - 25k

= 6k + 3 - 6k + 3 - 25k

= -19k + 6

= 2(k+1) + 1

So, the statement holds for k + 1.

By the principle of mathematical induction, the statement holds for all integers n ≥ 1.

Therefore, we have proved that bn = 2n + 1 for each integer n ≥ 1.

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There is no external force or moment acting at G. Therefore, the force acting on GD should pass through G.

The force in member GD is equal to the sum of the forces acting at joint D and G.

Given: P1​=2000lb and P2​=500lbThe free-body diagram of the truss is shown in the figure below: Free body diagram of the truss As the truss is in equilibrium, therefore, the algebraic sum of the horizontal and vertical forces on each joint is zero.

By resolving forces horizontally, we get; F_C_E = P_1/2 = 1000lbF_C_D = F_E_F = P_2 = 500lbAs both the forces are acting away from the joints, therefore, members CE and EF are in tension and member CD is in compression. Why the force acting at the pin G is directed along member GD.

The force acting at the pin G is directed along member GD as it is collinear to member GD.

Moreover, By resolving the forces at joint D, we get; F_C_D = F_D_G × cos 45°F_D_G = F_C_D / cos 45° = 500/0.707 = 706.14lb.

Now, resolving the forces at joint G;F_G_D = 706.14 lb Hence, the force in member GD is 706.14 lb.

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The cardinality of the subgroup generated by P is the number of distinct points in this list. However, since the list repeats after some point, we can conclude that the subgroup generated by P has a cardinality of 6.

To find the points that satisfy the equation y^2 = x^2 + ax + b (mod p) with the given parameters, we can substitute the values of a, b, and p into the equation and calculate the points.

Given parameters:

a = 1

b = 4

p = 7

The equation becomes:

y^2 = x^2 + x + 4 (mod 7)

To find the points that satisfy this equation, we can substitute different values of x and calculate the corresponding y values. We start with the point P = (0, 2), which is given.

Using point addition and doubling operations in elliptic curve groups, we can calculate the multiples of P:

1P = P + P

2P = 1P + P

3P = 2P + P

4P = 3P + P

Continuing this process, we can find the multiples of P. However, since the given elliptic curve group is defined over a finite field (mod p), we need to calculate the points (x, y) in modulo p as well.

Calculating the multiples of P modulo 7:

1P = (0, 2)

2P = (6, 3)

3P = (3, 4)

4P = (2, 1)

5P = (6, 4)

6P = (0, 5)

7P = (3, 3)

8P = (4, 2)

9P = (4, 5)

10P = (3, 3)

11P = (0, 2)

12P = (6, 3)

13P = (3, 4)

14P = (2, 1)

15P = (6, 4)

16P = (0, 5)

17P = (3, 3)

18P = (4, 2)

19P = (4, 5)

20P = (3, 3)

21P = (0, 2)

The multiples of P in the given elliptic curve group are:

(0, 2), (6, 3), (3, 4), (2, 1), (6, 4), (0, 5), (3, 3), (4, 2), (4, 5), (3, 3), (0, 2), (6, 3), (3, 4), (2, 1), (6, 4), (0, 5), (3, 3), (4, 2), (4, 5), (3, 3), ...

Therefore, the cardinality of the subgroup generated by P is 6.

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The correct histogram representation for the given scores in the history class is option B.

Based on the provided data, the correct histogram representation is:

B. A histogram titled Grades in History Class.

The x-axis is labeled Grade Earned and has intervals listed 41 to 50, 51 to 60, 61 to 70, 71 to 80, 81 to 90, 91 to 100.

The y-axis is labeled Frequency and begins at 0, with tick marks every one unit up to 9.

There is a shaded bar for 41 to 50 that stops at 1, for 51 to 60 that stops at 1, for 61 to 70 that stops at 4, for 71 to 80 that stops at 3, for 81 to 90 that stops at 2, and for 91 to 100 that stops at 2.

The reason for choosing this histogram is as follows:

Looking at the given scores: 45, 52, 65, 68, 68, 70, 77, 78, 78, 81, 85, 96, 100, we can count the frequency of scores within each interval.

In histogram B, the bars correctly represent the frequencies for each interval.

For example, there is one score in the interval 41 to 50, one score in the interval 51 to 60, four scores in the interval 61 to 70, three scores in the interval 71 to 80, two scores in the interval 81 to 90, and two scores in the interval 91 to 100.

The other histograms (A, C, D) have incorrect representations of the frequencies for each interval, which do not match the given scores.

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The critical point of f(x, y) = x² - xy + 2y² - 5x + 6y - 9 is a local minimum.

To express "+ in terms of x and y" for the given expression u = J(u ди + ax ду x-y), we need to solve for +. Let's break down the steps:

Start with the equation: u = J(u ди + ax ду x-y)

Square both sides of the equation to eliminate the square root: u² = (u ди + ax ду x-y)²

Expand the squared expression on the right side: u² = (u ди)² + 2(u ди)(ax ду x-y) + (ax ду x-y)²

Simplify the terms: u² = u² + 2(u ди)(ax ду x-y) + (ax ду x-y)²

Subtract u² from both sides of the equation: 0 = 2(u ди)(ax ду x-y) + (ax ду x-y)²

Factor out (ax ду x-y): 0 = (ax ду x-y)[2(u ди) + (ax ду x-y)]

Solve for +: (ax ду x-y) = 0 or

2(u ди) + (ax ду x-y) = 0

So, the expression "+ in terms of x and y" is given by:

(ax ду x-y) = 0 or

(ax ду x-y) = -2(u ди)

Question 1 (b):

In the formula D = h is given as 0.1 + 0.002 and v as 0.3 ± 0.02, we need to express the approximate maximum error of D in terms of E.

The formula for D is: D = h

The given values are: h = 0.1 + 0.002 and

v = 0.3 ± 0.02

To find the approximate maximum error of D, we can use the formula:

Approximate maximum error of D = (absolute value of the coefficient of E) * (maximum value of E)

From the given values, we can see that E corresponds to the error in v. Therefore, the approximate maximum error of D in terms of E can be expressed as:

Approximate maximum error of D = (absolute value of 1) * (maximum value of E)

Approximate maximum error of D = 1 * 0.02

Approximate maximum error of D = 0.02

So, the approximate maximum error of D in terms of E is 0.02.

Question 1 (c):

To find and classify the critical point of f(x, y) = x² - xy + 2y² - 5x + 6y - 9, we need to find the partial derivatives and solve the system of equations.

Given function: f(x, y) = x² - xy + 2y² - 5x + 6y - 9

Partial derivative with respect to x (df/dx):

df/dx = 2x - y - 5

Partial derivative with respect to y (df/dy):

df/dy = -x + 4y + 6

To find the critical point, we need to solve the system of equations:

2x - y - 5 = 0

-x + 4y + 6 = 0

Solving these equations simultaneously, we get:

2x - y = 5 ...(Equation 1)

-x + 4y = -6 ...(Equation 2)

Multiplying Equation 1 by 4 and adding it to Equation 2:

8x - 4y - x + 4y = 20 - 6

7x = 14

x = 2

Substituting the value of x into Equation 1:

2(2) - y = 5

4 - y = 5

y = -1

Therefore, the critical point is (x, y) = (2, -1).

To classify the critical point, we need to evaluate the second partial derivatives:

Partial derivative with respect to x twice (d²f/dx²):

d²f/dx² = 2

Partial derivative with respect to y twice (d²f/dy²):

d²f/dy² = 4

Partial derivative with respect to x and then y (d²f/dxdy):

d²f/dxdy = -1

Partial derivative with respect to y and then x (d²f/dydx):

d²f/dydx = -1

To classify the critical point, we can use the discriminant:

Discriminant (D) = (d²f/dx²)(d²f/dy²) - (d²f/dxdy)(d²f/dydx)

D = (2)(4) - (-1)(-1)

D = 8 - 1

D = 7

Since the discriminant (D) is positive, and both d²f/dx² and d²f/dy² are positive, we can classify the critical point (2, -1) as a local minimum.

Therefore, the critical point of f(x, y) = x² - xy + 2y² - 5x + 6y - 9 is a local minimum.

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The correct answer is Option B.10 . The constant of variation for this relation is k=10.

When two variables are directly proportional, they are related by the equation y=kx, where k is the constant of variation.

This means that as x increases, y increases proportionally.

On the other hand, if x decreases, then y decreases proportionally.

Hence, we are to determine the constant of variation for the given relation: If y varies directly as x, and y is 12 when x is 1.2,

We are given that y varies directly as x, which means we can write this as:y=kx, where k is the constant of variation.

We are also given that y is 12 when x is 1.2.

Thus:12=k(1.2)

Dividing both sides by 1.2, we get:k=10

Hence, the constant of variation for this relation is k=10.

The correct answer is Option B. 10

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Answer:

B

Step-by-step explanation:

The required depth value at 600 m upstream is 1.89 m.

Given,Width of the bottom of the trapezoidal channel = 4 m

Side slope of the trapezoidal channel = 2:1

Bottom slope of the trapezoidal channel = 0.003.

The trapezoidal channel is constructed using finished concrete and has a gravel bottom.

The problem requires us to determine the depth of the channel at 600 m upstream from a section with a measured depth of 2 m. We will use the depth and distance values to obtain an equation of the depth of the trapezoidal channel in the specified region.

Using the given information, we know that the channel depth can be calculated using the Manning's equation;

Q = (1/n)A(P1/3)(S0.5),

where

Q = flow rate of water

A = cross-sectional area of the water channel

n = roughness factor

S = bottom slope of the channel

P = wetted perimeter

P = b + 2y √(1 + (2/m)^2)

Here, b is the width of the channel at the base and m is the side slope of the channel. 

Substituting the given values in the equation, we get;

Q = (1/n)[(4 + 2y √5) / 2][(4-2y √5) + 2y]y^2/3(0.003)^0.5

Where y is the depth of the trapezoidal channel.

The flow rate Q remains constant throughout the channel, hence;

Q = 0.055m3/s

[Let's assume]

A = by + (2/3)m*y^2

A = (4y + 2y√5)(y)

A = 4y^2 + 2y^2√5

P = b + 2y√(1+(2/m)^2)

P = 4 + 2y√5

S = 0.003

N = 0.014

[Given, let's assume]

Hence the equation can be written as;

0.055 = (1/0.014)[(4+2y√5) / 2][(4-2y√5)+2y]y^2/3(0.003)^0.5

Simplifying the equation and solving it, we obtain;

y = 1.531 m

Using the obtained depth value and the distance of 600 m upstream, we can solve for the required depth value.

The distance increment is 0.2 m, hence;

Number of sections = 600/0.2 = 3000

Approximate depth at 600 m upstream = 1.531 m

[As calculated earlier]

Hence the depth value at 600 m upstream can be approximated to be;

1.89 m

[Using interpolation]

Thus, the required depth value at 600 m upstream is 1.89 m. [Answer]

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When a 36-inch pipe divides into three 18-inch pipes, carrying a flow rate of 42 ft³/s, the flow will divide based on the relative lengths and elevations of the pipes.

To determine the flow division, the friction factor needs to be estimated. The drawdown energy line and hydraulic grade line can be plotted to visualize the flow characteristics. To determine the flow division, we need to consider the relative lengths and elevations of the three 18-inch pipes. Let's denote the lengths of the pipes as L₁ = 2 miles, L₂ = 3 miles, and L₃ = 4 miles, and the surface elevations of the reservoirs as H₁ = 300 ft, H₂ = 200 ft, and H₃ = 100 ft. We also know that the flow rate in the 36-inch pipe is 42 ft³/s.

Using the principles of fluid mechanics, we can apply the energy equation to calculate the friction factor and subsequently determine the flow division. The friction factor can be estimated using the Moody diagram or other suitable methods. Once the friction factor is known, we can calculate the head loss due to friction in each pipe segment and determine the pressure at the outlet of each pipe.

With the pressure information, we can determine the flow division based on the pressure differences between the pipes. The flow will be higher in the pipe with the least pressure difference and lower in the pipes with higher pressure differences.

To visualize the flow characteristics, we can plot the drawdown energy line and the hydraulic grade line. The drawdown energy line represents the total energy along the pipe, including the elevation head and pressure head. The hydraulic grade line represents the energy gradient, indicating the change in energy along the pipe. By analyzing the drawdown energy line and hydraulic grade line, we can understand the flow division and identify any potential issues such as excessive pressure drops or inadequate flow rates.

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The flow in the 36-inch pipe will divide among the three 18-inch pipes based on their respective lengths and elevations. The flow division can be determined using the principles of open-channel flow and the energy equations. By calculating the friction factor and employing hydraulic calculations, the flow distribution can be determined accurately. The first paragraph provides a summary of the answer.

To calculate the flow division, we can use the Darcy-Weisbach equation along with the Moody diagram to estimate the friction factor for copper pipes. With the given flow rate of 42 ft³/s, the energy equation can be applied to determine the pressure head at the junction where the pipes divide. From there, the flow will distribute based on the relative lengths and elevations of the three 18-inch pipes.

Next, we can draw the energy line and hydraulic grade line to visualize the flow characteristics. The energy line represents the total energy of the flowing fluid, including the pressure head and velocity head, along the pipe network. The hydraulic grade line represents the sum of the pressure head and the elevation head. By plotting these lines, we can analyze the flow division and identify any potential issues such as excessive head losses or insufficient pressure at certain points.

In conclusion, by applying the principles of open-channel flow and hydraulic calculations, we can determine the flow division in the given pipe network. The friction factor for copper pipes can be estimated using the Moody diagram, and the energy equations can be used to calculate pressure heads and flow distribution. Visualizing the system through energy line and hydraulic grade line diagrams provides further insights into the flow characteristics.

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Using a numerical method such as the Newton-Raphson method, the first root of J₁(x)/x is found to be approximately 3.83.

Therefore, α = 3.83/3.

For a sphere of radius r, volume V, and surface area A (which is given by 4πr²), the Biot number can be defined as:

Bi=khV/A

where k is the thermal conductivity of the sphere material, h is the heat transfer coefficient and rho is the density of the material and cp is the specific heat of the material.

(a) For Copper, k = 212 BTU/(h-ft-F), rho = 555 lb/ft³, cp = 0.092 BTU/(lb-F)

The Biot number for copper can be calculated as:Bi = 3k/hR= (3 × 212)/(10 × 3 × 1) = 6.36

Therefore, a lumped analysis applies since Bi < 0.1.

Since a lumped analysis applies, the temperature of the sphere can be determined using the following equation:

T(t) - Ta = (Ti - Ta) × exp(-hAt/mc p

)where T(t) is the temperature of the sphere at time t, Ta is the ambient temperature of the surroundings (1000°F), Ti is the initial temperature of the sphere (70°F), m is the mass of the sphere, and t is the time.

The mass of the sphere can be calculated as:

m = rhoV= 555 × (4/3) × π × (3³) = 113097.24 lb

The specific heat capacity of copper is cp = 0.092 BTU/(lb-F).

Therefore, the product mc p is given by:

mc p = 113097.24 × 0.092 = 10403.0768

The temperature at the center of the sphere reaches 907°F after 53.06 seconds, which is calculated using:

T(t) = Ta + (Ti - Ta) × exp(-hAt/mc p)

= 1000 + (70 - 1000) × exp(-10 × 4π × (3)² × t/10403.0768)  

= 907

(b) For Asbestos, k = 0.08 BTU/(h-ft-F), rho = 36 lb/ft³, cp = 0.25 BTU/(lb-F)

The Biot number for asbestos can be calculated as:

Bi = 3k/hR= (3 × 0.08)/(10 × 3 × 1) = 0.072

Therefore, a distributed analysis applies since Bi > 0.1.

Thus, the temperature distribution within the sphere needs to be considered.

The temperature distribution is given by:

T(r,t) - Ta = (Ti - Ta) [I₀(αr) exp(-α²ht/ρcp)] / [I₀(αR)]

where I₀ is the modified Bessel function of the first kind of order zero, α is the first root of I₁(x)/x and R is the radius of the sphere.

The temperature at the center of the sphere can be determined by setting r = 0:

T(0,t) - Ta = (Ti - Ta) [I₀(0) exp(-α²ht/ρcp)] / [I₀(αR)]T(0,t) - Ta

= (Ti - Ta) exp(-α²ht/ρcp)T(0,t)

= Ta + (Ti - Ta) exp(-α²ht/ρcp)

The mass of the sphere can be calculated as:

m = rhoV= 36 × (4/3) × π × (3³) = 7322.4 lb

The specific heat capacity of asbestos is cp = 0.25 BTU/(lb-F).

Therefore, the product mc p is given by:

mc p = 7322.4 × 0.25 = 1830.6The temperature at the center of the sphere reaches 907°F after 72.6 seconds, which is calculated using:

T(0,t) = Ta + (Ti - Ta) exp(-α²ht/ρcp)

= 1000 + (70 - 1000) exp(-α² × 10 × 72.6/1830.6)

= 907

The value of α can be determined by solving the following equation:

J₁(x) = 0where J₁ is the Bessel function of the first kind of order one.

Using a numerical method such as the Newton-Raphson method, the first root of J₁(x)/x is found to be approximately 3.83.

Therefore, α = 3.83/3.

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Option b) is correct.The formula to calculate the E modulus of a composite is E = VfEc + (1 - Vf)Em

Where, Vf is the volume fraction of the fibers, Ec and Em are the E modulus of the fibers and matrix, respectively.

Let us use the formula to calculate the E modulus of the composite consisting of a polyester matrix with 60 vol% glass fiber in both directions.

Given: Volume fraction of fibers in both directions,

Vf = 60% = 0.60E modulus of the polyester matrix,

Em = 6900 MPaE modulus of glass fiber,

Ec = 72.4 GPa

Substituting the values in the formula, we get:

E = VfEc + (1 - Vf)Em

= (0.6 × 72.4 × 109) + (0.4 × 6900 × 106)

= 43.44 × 109 + 2760 × 106= 46.2 GPa

Thus, the E modulus of the composite consisting of a polyester matrix with 60 vol% glass fiber in both directions is 46.2 GPa. Therefore, option b) is correct.

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The differential equation is:[tex]d²y/dx² + 3y = 3x.[/tex]Given differential equation:

[tex]y = a cos(3x) + b sin(3x) + x[/tex]

We can use the following trigonometric identities:

[tex]cos(A)cos(B) = (1/2)[cos(A + B) + cos(A - B)]sin(A)[/tex]

[tex]sin(B) = (1/2)[cos(A - B) - cos(A + B)]cos(A)[/tex]

[tex]sin(B) = (1/2)[sin(A + B) - sin(A - B)][/tex]

Eliminate the arbitrary constants a and b from the given differential equation by differentiating the equation with respect to x and use the above identities to obtain:

[tex]dy/dx = -3a sin(3x) + 3b cos(3x) + 1On[/tex]

differentiating once more with respect to x, we get:

[tex]d²y/dx² = -9a cos(3x) - 9b sin(3x)[/tex]

On substituting the values of a

[tex]cos(3x) + b sin(3x) and d²y/dx²[/tex]

in the above equation, we get:

[tex]d²y/dx² = -3(y - x)[/tex]

The differential equation is:

[tex]d²y/dx² + 3y = 3x.[/tex]

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The number of ways to arrange the three adults who are seated together in a row with four childern is 5! x 3!

The number of ways to arrange the three adults who are seated together in a row can be determined by treating them as a single group. This means that we have 1 group of 3 adults and 4 children to arrange in a row.

To find the number of ways to arrange them, we can consider the group of 3 adults as a single entity and the total number of entities to be arranged is now 1 (the group of 3 adults) + 4 (the individual children) = 5.

The number of ways to arrange these 5 entities can be calculated using the factorial function, denoted by "!".

Therefore, the correct answer is b. 5! x 3!.

- In this case, we have 5 entities to arrange, so the number of arrangements is 5!.
- Additionally, within the group of 3 adults, the adults can be arranged among themselves in 3! ways.
- Therefore, the total number of arrangements is 5! x 3!.

So, the correct answer is b. 5! x 3!.

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The osmotic pressure of the ocean water against pure water is 26.28 atm. The osmotic pressure of freshwater lakes against pure water is 0.263 atm.  The osmotic pressure can be calculated by applying Van't Hoff equation.

Pi = MRT where Pi = osmotic pressure, M = molarity of the solution, R = gas constant, and T = temperature

To calculate osmotic pressure of ocean water, Pi = 0.5 M x 0.08206 L atm / mol K x (273 + 25) K = 26.28 atm

To calculate osmotic pressure of freshwater lakes, Pi = 0.005 M x 0.08206 L atm / mol K x (273 + 25) K = 0.263 atm

The free energy required to transfer 1 mol of pure water from the ocean to the lake at 25°C is +9.36 kJ mol-1.  ΔG = RT ln(K) where K = KeqQ. Keq for this process is [Mg2+][Cl-]2/[Na+][Cl-].

If the activities of the 4 ions are assumed to be equal to their molarities, thenQ = [Mg2+][Cl-]2/[Na+][Cl-] = (0.005 mol/L)2/(0.5 mol/L) = 0.00005K = KeqQ = 1.8 x 10-10ΔG = RT ln(K) = (8.314 J mol-1 K-1)(298 K) ln(1.8 x 10-10) = 9.36 kJ mol-1

The solution with lower salt concentration, the freshwater lake, has the highest vapor pressure. The vapor pressure of a solution decreases with increasing concentration of solutes in the solution. Thus, the solution with a higher salt concentration, the ocean, has a lower vapor pressure and the freshwater lake has a higher vapor pressure.

The activity of water at 100°C is 0.984. The vapor pressure of a solution is related to its mole fraction of solvent X1 by P = X1P°, where P is the vapor pressure of the solution, P° is the vapor pressure of the pure solvent, and X1 is the mole fraction of the solvent. Rearranging this equation gives X1 = P/P°. The mole fraction of the solvent is equal to the activity of solvent. Thus, the activity of water at 100°C is X1 = P/P° = 0.0984 MPa / 0.1000 MPa = 0.984.

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The osmotic pressure can be calculated using the Van 't Hoff equation, allowing for the determination of osmotic pressure in ocean water and freshwater lake water. The free energy required to transfer 1 mol of pure water between the two can be calculated using the formula involving osmotic pressures. The vapor pressure is inversely related to solute concentration, with the lake water having a higher vapor pressure compared to the ocean water. The activity of water at 100°C can be determined using Raoult's Law, dividing the observed vapor pressure of the solution by the vapor pressure of pure water at the same temperature.

a) The osmotic pressure (π) can be calculated using the Van 't Hoff equation:

π = MRT

Where M is the molarity of the solution, R is the ideal gas constant, and T is the temperature in Kelvin. For the ocean water (0.5 M NaCl), the osmotic pressure can be calculated. Similarly, for the lake water (0.005 M MgCl2), the osmotic pressure can be determined.

b) The free energy required to transfer 1 mol of pure water from the ocean to the lake can be calculated using the equation:

ΔG = -RT ln(π1/π2)

Where ΔG is the change in free energy, R is the ideal gas constant, T is the temperature in Kelvin, and π1 and π2 are the osmotic pressures of the ocean and the lake, respectively.

c) The vapor pressure of a solution decreases as the solute concentration increases.

Therefore, the ocean water with a higher salt concentration (0.5 M NaCl) will have a lower vapor pressure compared to the lake water (0.005 M MgCl2).

Hence, the lake water will have a higher vapor pressure.

d) The activity (a) of water can be calculated using Raoult's Law:

a = P/P0

Where P is the observed vapor pressure of the solution and P0 is the vapor pressure of pure water at the same temperature. By dividing the observed vapor pressure of 0.5 M NaCl solution (0.0984 MPa) by the vapor pressure of pure water at 100°C (0.1000 MPa), you can determine the activity of water.

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The mass of Ag₂CO3(s) produced by mixing 130.3 mL of 0.365 M Na₂CO3(aq) and 71.1 mL of 0.216 M AgNO3(aq) is 0.337 g.

To calculate the mass of Ag₂CO3(s) produced, we need to determine the limiting reagent between Na₂CO3 and AgNO3. The limiting reagent is the reactant that is completely consumed and determines the maximum amount of product that can be formed.

First, we need to calculate the number of moles of Na₂CO3 and AgNO3 using their molarity and volume.
For Na₂CO3:
Moles = concentration (M) × volume (L)
Moles = 0.365 mol/L × 0.1303 L = 0.0475 mol

For AgNO3:
Moles = concentration (M) × volume (L)
Moles = 0.216 mol/L × 0.0711 L = 0.0154 mol

Next, we need to determine the stoichiometric ratio between Na₂CO3 and Ag₂CO3. According to the balanced equation, 2 moles of AgNO3 react with 1 mole of Na₂CO3 to produce 1 mole of Ag₂CO3.

Comparing the moles of Na₂CO3 and AgNO3, we can see that there is an excess of Na₂CO3, as 0.0475 mol > 0.0154 mol. Therefore, AgNO3 is the limiting reagent.

Now, we can calculate the moles of Ag₂CO3 produced from the moles of AgNO3:
Moles of Ag₂CO3 = moles of AgNO3 × (1 mole of Ag₂CO3 / 2 moles of AgNO3)
Moles of Ag₂CO3 = 0.0154 mol × (1 mol / 2 mol) = 0.0077 mol

Finally, we can calculate the mass of Ag₂CO3 using its molar mass:
Mass of Ag₂CO3 = moles of Ag₂CO3 × molar mass of Ag₂CO3
Mass of Ag₂CO3 = 0.0077 mol × 275.8 g/mol = 0.337 g.

Therefore, the mass of Ag₂CO3 produced is 0.337 g.

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1. The total of birds(y) in terms of bird feeder(x) is y = 5+3x

2. The number of bird feeder(x) in terms of bird(y) is x = (y - 5)/3

A word problem in math is a math question written as one sentence or more . These statements are interpreted into mathematical equation or expression.

Represent the number of bird feeder by x

for a bird feeder , 3 birds appear

number of birds that come for feeder = 3x

Total number of birds (y)

y = 5+3x

re arranging it to make x subject

3x = y -5

x = (y-5)/3

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the company must sell approximately 526.32 units each month at P63 per unit in order to just break even.

To calculate the number of units that must be sold each month for the company to break even, we need to consider the fixed costs and the variable costs per unit.

Given:

Fixed costs = P40,000 per month

Cost of materials and labor for 96 units = P2997 per day

Selling price per unit = P63

First, let's calculate the variable cost per unit:

Variable cost per unit = Cost of materials and labor / Number of units produced

Since the cost of materials and labor is given for 96 units in 1 day, we can calculate the variable cost per unit as follows:

Variable cost per unit = P2997 / 96

Next, let's calculate the total cost per unit:

Total cost per unit = Fixed costs / Number of units produced + Variable cost per unit

Since we want to determine the break-even point, the total cost per unit should be equal to the selling price per unit:

Total cost per unit = P63

Now we can set up the equation and solve for the number of units that must be sold each month:

Total cost per unit = P63

Fixed costs / Number of units produced + Variable cost per unit = P63

Substituting the given values:

40,000 / Number of units produced + (2997 / 96) = 63

To isolate the number of units produced, we can rearrange the equation:

40,000 / Number of units produced = 63 - (2997 / 96)

Now, we can solve for the number of units produced:

Number of units produced = 40,000 / (63 - (2997 / 96))

Calculating the value:

Number of units produced ≈ 526.32

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A. The flow rate in bbl/day is approximately

   [tex]\[ Q = \frac{{130 \, \text{md} \cdot 7000 \, \text{ft}^2 \cdot 400 \, \text{psi}}}{{2 \, \text{cp} \cdot 1200 \, \text{ft}}} \][/tex].

B. The apparent fluid velocity in ft/day is approximately

[tex]\[ V_a = \frac{Q}{A} \][/tex].

C. The actual fluid velocity in ft/day when assuming the porous media with a dip angle of 15° is approximately

[tex]\[ V = \frac{V_a}{\cos(\theta)} \][/tex].

To calculate the flow rate, we can use Darcy's Law, which states that the flow rate (Q) is equal to the cross-sectional area (A) multiplied by the apparent fluid velocity (V):

Q = A * V

To calculate A, we need to consider the dimensions of the reservoir. Given the width (350 ft), height (20 ft), and length (1200 ft), we can calculate A as:

A = width * height * length

Next, we need to calculate the apparent fluid velocity (V). The apparent fluid velocity is determined by the pressure gradient across the porous media and can be calculated using the following equation:

[tex]\[ V = \frac{{p_1 - p_2}}{{\mu \cdot L}} \][/tex]

Where p1 and p2 are the initial and final pressures, μ is the viscosity of the fluid, and L is the length of the reservoir.

Once we have the apparent fluid velocity, we can calculate the actual fluid velocity (Va) when assuming a dip angle of 15° using the following equation:

[tex]\[ V_a = \frac{V}{{\cos(\theta)}} \][/tex]

Where θ is the dip angle.

To calculate the fluid potential at points 1 and 2, we can use the equation:

Fluid potential = pressure / (ρ * g)

Where pressure is the given pressure at each point, ρ is the density of the fluid, and g is the acceleration due to gravity.

To solve for the flow rate, apparent fluid velocity, and actual fluid velocity, we'll substitute the given values into the respective formulas.

Given:

Width = 350 ft

Height = 20 ft

Length = 1200 ft

Permeability (k) = 130 md

Pressure at Point 1 (p1) = 800 psi

Pressure at Point 2 (p2) = 1200 psi

Viscosity (μ) = 2 cp

Density of the fluid = 47 lb/ft³

Dip angle (θ) = 15°

A. Flow rate:

Using Darcy's law, the flow rate (Q) can be calculated as:

[tex]\[ Q = \frac{{k \cdot A \cdot \Delta P}}{{\mu \cdot L}} \][/tex]

where

A = Width × Height = 350 ft × 20 ft = 7000 ft²

ΔP = p2 - p1 = 1200 psi - 800 psi = 400 psi

L = Length = 1200 ft

Substituting the given values:

[tex]\[ Q = \frac{{130 \, \text{md} \cdot 7000 \, \text{ft}^2 \cdot 400 \, \text{psi}}}{{2 \, \text{cp} \cdot 1200 \, \text{ft}}} \][/tex]

Solve for Q, and convert the units to bbl/day.

B. Apparent fluid velocity:

The apparent fluid velocity (Va) can be calculated as:

[tex]\[ V_a = \frac{Q}{A} \][/tex]

Substitute the calculated value of Q and the cross-sectional area A.

C. Actual fluid velocity:

The actual fluid velocity (V) when considering the dip angle (θ) can be calculated as:

[tex]\[ V = \frac{V_a}{\cos(\theta)} \][/tex]

Substitute the calculated value of Va and the given dip angle θ.

Finally, provide the numerical values for A, B, and C by inserting the calculated values into the respective statements.

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Using a direct proof, we showed that if m + n ≥ 59, then either m ≥ 30 or n ≥ 30.

A direct proof, proof by contraposition or proof by contradiction, To prove the statement "if m + n ≥ 59 then (m ≥ 30 or n ≥ 30)," we will use a direct proof.

Assume that m + n ≥ 59 is true.

We need to prove that either m ≥ 30 or n ≥ 30.

Suppose, for the sake of contradiction, that both m < 30 and n < 30.

Adding these inequalities, we get m + n < 30 + 30, which simplifies to m + n < 60.

However, this contradicts our initial assumption that m + n ≥ 59.

Therefore, our assumption that both m < 30 and n < 30 leads to a contradiction.

Hence, at least one of the conditions, m ≥ 30 or n ≥ 30, must be true.

Thus, we have proven that if m + n ≥ 59, then (m ≥ 30 or n ≥ 30) using a direct proof.

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The 71st percentile of the data set (27, 34, 15, 20, 25, 30, 28, 25) is 30.

To find the 71st percentile in the given data set (27, 34, 15, 20, 25, 30, 28, 25), we first need to arrange the data in ascending order: 15, 20, 25, 25, 27, 28, 30, 34.

Next, we calculate the rank of the 71st percentile using the formula:

Rank = (P/100) * (N + 1)

where P is the desired percentile (71) and N is the total number of data points (8).

Substituting the values, we have:

Rank = (71/100) * (8 + 1)

= 0.71 * 9

= 6.39

Since the rank is not an integer, we round it up to the nearest whole number. The 71st percentile corresponds to the value at the 7th position in the ordered data set.

The 7th value in the ordered data set (15, 20, 25, 25, 27, 28, 30, 34) is 30.

Therefore, the 71st percentile of the given data set is 30.

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1.84.20 grams of silver chloride will be produced.

CaCl₂ is the limiting reactant.

2. This is a double displacement reaction or metathesis reaction.

1. To determine how many grams of silver chloride will be produced, we need to first calculate the moles of each reactant. The molar mass of silver nitrate (AgNO₃) is 169.87 g/mol, and the molar mass of calcium chloride (CaCl₂) is 110.98 g/mol. Using the given masses, we can calculate the moles of each reactant:

- Moles of AgNO₃ = 100.0 g / 169.87 g/mol = 0.588 mol

- Moles of CaCl₂ = 100.0 g / 110.98 g/mol = 0.901 mol

From the balanced equation, we see that the ratio of moles of AgNO₃ to AgCl is 2:2, meaning that 1 mol of AgNO₃ produces 1 mol of AgCl. Therefore, the moles of AgCl produced will be equal to the moles of AgNO₃. To find the mass of AgCl produced, we multiply the moles of AgCl by its molar mass (143.32 g/mol):

- Mass of AgCl = 0.588 mol * 143.32 g/mol = 84.20 g

Therefore, 84.20 grams of silver chloride will be produced.

To determine the limiting reactant, we compare the moles of each reactant to their stoichiometric ratio in the balanced equation. The ratio of AgNO₃ to CaCl₂ is 2:1. Since we have 0.588 moles of AgNO₃ and 0.901 moles of CaCl₂, we can see that there is an excess of CaCl₂. Therefore, CaCl₂ is the limiting reactant.

2. This reaction is classified as a double displacement or precipitation reaction. In a double displacement reaction, the cations and anions of two compounds switch places, forming two new compounds. In this case, the silver ion (Ag⁺) from silver nitrate (AgNO₃) combines with the chloride ion (Cl⁻) from calcium chloride (CaCl₂) to form silver chloride (AgCl), and the calcium ion (Ca²⁺) from calcium chloride combines with the nitrate ion (NO₃⁻) from silver nitrate to form calcium nitrate (Ca(NO₃)₂). The formation of a solid precipitate (AgCl) indicates a precipitation reaction.

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1. 84.20 grams of silver chloride will be produced.

CaCl₂ is the limiting reactant.

2. This is a double displacement reaction or metathesis reaction.

1. To determine how many grams of silver chloride will be produced, we need to first calculate the moles of each reactant.

The molar mass of silver nitrate (AgNO₃) is 169.87 g/mol, and the molar mass of calcium chloride (CaCl₂) is 110.98 g/mol.

Using the given masses, we can calculate the moles of each reactant:

- Moles of AgNO₃ = 100.0 g / 169.87 g/mol = 0.588 mol

- Moles of CaCl₂ = 100.0 g / 110.98 g/mol = 0.901 mol

From the balanced equation, we see that the ratio of moles of AgNO₃ to AgCl is 2:2, meaning that 1 mol of AgNO₃ produces 1 mol of AgCl. Therefore, the moles of AgCl produced will be equal to the moles of AgNO₃.

To find the mass of AgCl produced, we multiply the moles of AgCl by its molar mass (143.32 g/mol):

- Mass of AgCl = 0.588 mol * 143.32 g/mol = 84.20 g

Therefore, 84.20 grams of silver chloride will be produced.

To determine the limiting reactant, we compare the moles of each reactant to their stoichiometric ratio in the balanced equation.

The ratio of AgNO₃ to CaCl₂ is 2:1. Since we have 0.588 moles of AgNO₃ and 0.901 moles of CaCl₂, we can see that there is an excess of CaCl₂. Therefore, CaCl₂ is the limiting reactant.

2. This reaction is classified as a double displacement or precipitation reaction. In a double displacement reaction, the cations and anions of two compounds switch places, forming two new compounds.

In this case, the silver ion (Ag⁺) from silver nitrate (AgNO₃) combines with the chloride ion (Cl⁻) from calcium chloride (CaCl₂) to form silver chloride (AgCl), and the calcium ion (Ca²⁺) from calcium chloride combines with the nitrate ion (NO₃⁻) from silver nitrate to form calcium nitrate (Ca(NO₃)₂).

The formation of a solid precipitate (AgCl) indicates a precipitation reaction.

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Using Adams's method with d = 16 to apportion the new officers among the precincts as Precinct A: 39 officers, Precinct C: 47 officers, Precinct D: 20 officers, Precinct E: 29 officers, Precinct F: 39 officers.

To apportion the 175 new officers among the six precincts using Adams's method with d = 16, we need to follow these steps:

1. Calculate the crime ratios for each precinct by dividing the number of crimes by the square root of the number of officers already assigned to that precinct.
  - Precinct A: Crime ratio = 436 / √(16) = 109
  - Precinct C: Crime ratio = 522 / √(16) = 131
  - Precinct D: Crime ratio = 218 / √(16) = 55
  - Precinct E: Crime ratio = 324 / √(16) = 81
  - Precinct F: Crime ratio = 433 / √(16) = 108

2. Calculate the total crime ratio by summing up the crime ratios of all precincts.
  Total crime ratio = 109 + 131 + 55 + 81 + 108 = 484

3. Calculate the apportionment for each precinct by multiplying the total number of officers (175) by the crime ratio for each precinct, and then dividing it by the total crime ratio.
  - Precinct A: Apportionment = (175 * 109) / 484 = 39 officers
  - Precinct C: Apportionment = (175 * 131) / 484 = 47 officers
  - Precinct D: Apportionment = (175 * 55) / 484 = 20 officers
  - Precinct E: Apportionment = (175 * 81) / 484 = 29 officers
  - Precinct F: Apportionment = (175 * 108) / 484 = 39 officers

So, according to Adams's method with d = 16, the new officers should be apportioned as follows:
- Precinct A: 39 officers
- Precinct C: 47 officers
- Precinct D: 20 officers
- Precinct E: 29 officers
- Precinct F: 39 officers

This apportionment aims to allocate the officers in a way that takes into account the crime rates of each precinct relative to their existing officer counts.

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The probability that Tamika draws a strawberry-flavored candy is 1/4.

The probability that Tamika draws a strawberry-flavored candy can be calculated by dividing the number of strawberry-flavored candies by the total number of candies in the pack.

Since each pack contains 4 flavors and there are even numbers of all flavors, we can assume that each flavor appears the same number of times.

Therefore, there are 20/4 = 5 candies of each flavor in the pack.

So, the number of strawberry-flavored candies is 5.

The total number of candies in the pack is given as 20.

To calculate the probability, we divide the number of strawberry-flavored candies by the total number of candies:

Probability = Number of strawberry-flavored candies / Total number of candies

Probability = 5 / 20

Simplifying the fraction, we get:

Probability = 1 / 4

Therefore, the probability that Tamika draws a strawberry-flavored candy is 1/4.

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To calculate the effective work index (kWh/t) of the ore in the regrind mill, we need to use the Bond's Law equation. The effective work index of the ore in the regrind mill is 44.53 kWh/t.

Explanation:

To calculate the effective work index, we need to determine the energy consumption in the Tower mill.

The energy consumption can be obtained by subtracting the energy input (40 kW) from the energy output, which is the product of the mass flow rate (1.0 t/h) and the specific energy consumption (kWh/t) to achieve the desired particle size reduction.

By dividing the energy consumption by the mass flow rate, we can determine the effective work index of the ore in the regrind mill, which is 44.53 kWh/t.

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The enthalpy change for the reaction 2M(s) + 3Cl₂(g) -> 2MCl₃(s) is -2740.2 kJ.

The enthalpy change for the reaction can be determined by considering the enthalpy changes of the individual steps involved.

First, we can use the given enthalpy change for the reaction 2M(s) + 6HCl(aq) -> 2MCl₃(aq) + 3H₂(g) (-ΔH₁ = -720.0 kJ) to write the overall reaction as 2M(s) + 6HCl(aq) -> 2MCl₃(s) + 3H₂(g) (-ΔH₁ = -720.0 kJ).

Next, we can use the given enthalpy change for the reaction HCl(g) -> HCl(aq) (-ΔH₂ = -74.8 kJ) to write the overall reaction as 2M(s) + 6HCl(aq) -> 2MCl₃(s) + 3H₂(g) + 3HCl(aq) (-ΔH₁ + ΔH₂ = -794.8 kJ).

Finally, we can use the given enthalpy change for the reaction 3HCl(aq) -> 3HCl(g) (-ΔH₃ = -310.0 kJ) to write the overall reaction as 2M(s) + 6HCl(aq) -> 2MCl₃(s) + 3H₂(g) + 3HCl(g) (-ΔH₁ + ΔH₂ - ΔH₃ = -1104.8 kJ).

Since the reaction is balanced as written, the enthalpy change for the reaction 2M(s) + 3Cl₂(g) -> 2MCl₃(s) is equal to the sum of the enthalpy changes of the individual steps, which gives us -ΔH₁ + ΔH₂ - ΔH₃ = -1104.8 kJ.

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Option 2. T and U  he L closest to the N-terminus form hydrogen bonds to help create the α-helix

A hydrogen bond is a type of chemical bond that occurs between a hydrogen atom and an electronegative atom, such as oxygen, nitrogen, or fluorine.

It is a relatively weak bond compared to covalent or ionic bonds but still plays a crucial role in many biological and chemical processes.

In a hydrogen bond, the hydrogen atom involved is covalently bonded to another atom, which is more electronegative.

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The general solution of the given differential equation is the sum of the complementary and particular solutions:

 y = c₁t^² + c₂t^³ - t^4 + (t^5/6 + t^4/36).

To solve the given differential equation t^²(d^²y/dt^²) - 4t(dy/dt) + 6y = 6t^4 - t^² using the method of variation of parameters, we first need to find the complementary solution, and then the particular solution.

   Complementary Solution:

   First, we find the complementary solution to the homogeneous equation t^²(d^²y/dt^²) - 4t(dy/dt) + 6y = 0. Let's assume the solution has the form y_c = t^m.

   Substituting this into the differential equation, we get:

   t^²(m(m-1)t^(m-2)) - 4t(mt^(m-1)) + 6t^m = 0

Simplifying, we have:

m(m-1)t^m - 4mt^m + 6t^m = 0

(m^2 - 5m + 6)t^m = 0

Setting the equation equal to zero, we get the characteristic equation:

m^2 - 5m + 6 = 0

Solving this quadratic equation, we find the roots m₁ = 2 and m₂ = 3.

The complementary solution is then:

y_c = c₁t^² + c₂t^³

   Particular Solution:

   Next, we find the particular solution using the method of variation of parameters. Assume the particular solution has the form:

   y_p = u₁(t)t^² + u₂(t)t^³

Differentiating with respect to t, we have:

dy_p/dt = (2u₁(t)t + t^²u₁'(t)) + (3u₂(t)t^² + t^³u₂'(t))

Taking the second derivative, we get:

d^²y_p/dt^² = (2u₁'(t) + 2tu₁''(t) + 2u₁(t)) + (6u₂(t)t + 6t^²u₂'(t) + 6tu₂'(t) + 6t³u₂''(t))

Substituting these derivatives back into the original differential equation, we have:

t^²[(2u₁'(t) + 2tu₁''(t) + 2u₁(t)) + (6u₂(t)t + 6t^²u₂'(t) + 6tu₂'(t) + 6t^³u₂''(t))] - 4t[(2u₁(t)t + t^²u₁'(t)) + (3u₂(t)t^² + t^³u₂'(t))] + 6[u₁(t)t^² + u₂(t)t^³] = 6t^4 - t^²

Simplifying and collecting terms, we obtain:

2t^²u₁'(t) + 2tu₁''(t) - 4tu₁(t) + 6t^³u₂''(t) + 6t^²u₂'(t) = 6t^4

To find the particular solution, we solve the system of equations:

2u₁'(t) - 4u₁(t) = 6t^²

6u₂''(t) + 6u₂'(t) = 6t^2

Solving these equations, we find:

u₁(t) = -t^²

u₂(t) = t^²/6 + t/36

Therefore, the particular solution is:

y_p = -t^²t^² + (t^²/6 + t/36)t^³

y_p = -t^4 + (t^5/6 + t^4/36)

   General Solution:

   Finally, the general solution of the given differential equation is the sum of the complementary and particular solutions:

   y = y_c + y_p

   y = c₁t^² + c₂t^³ - t^4 + (t^5/6 + t^4/36)

This is the general solution to the differential equation.

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