True or False : If a car drives on a road for a nonzero amount of time, then its average velocity must be nonzero.

Explanation:

Which of the following solutions have a concentration of 0.11 g/mL?

Answer:

22 g of acetic acid in 200 mL of water

Explanation:

22g/200mL = 0.11 g/mL

Answer:

O The resistor decreases the current by transforming electrical energy into different types of energy

Explanation:

resistors convert elec energy to heat

Answer:

D

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much love! <33

Answer:

It doesn’t it may burn the road a little but nothing much other than that I can think ok

Explanation:

Answer:

Ty's blood is slightly alkaline

Explanation:

Answer:

The answer is decay; timbre.

Explanation:

How long the fundamental frequency and harmonic remain at their peak loudness until they start to disappear is known as decay and is a feature of timbre.

Answer:

The graph demonstrates two major trends. First, employment numbers began to drop sharply in 2008. These numbers fell until 2010, when they reached a trough. Employment began to rise again after this point and continued to rise into 2013.

Explanation:

From the information provided in the question, the total mass of the nucleons is 60.49218 u.

The term nucleons refers to both the  neutrons and the protons that are found in the nucleus of atoms. We have the following information;

Mass of Proton: 1. 007825 u

Mass of Neutron: 1. 008665 u

Mass of 27 neutrons = 27(1. 008665 u) = 27.233955

Mass of 33 protons = 33(1. 007825 u) = 33.258225

Total mass of nucleons = 27.233955 + 33.258225 = 60.49218 u

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Answer:

hB djJS E DIS SIS. AHA. SDI DVZ SIS.Zsjsnw

Answer:

see explanation

Explanation:

This sculpture is entitled, Buddha and Attendents. It was made of sandstone flecked with cream-colored spots. Buddha's right hand is raised in a gesture meaning "have no fear". This sculpture is from the Mathura school of thought.

sample response 3dge22

Answer:

This sculpture is entitled, Buddha and Attendents. It was made of sandstone flecked with cream-colored spots. Buddha’s right hand is raised in a gesture meaning ”have no fear”. This sculpture is from the Mathura school of thought.

Explanation:

picture

The distance above the balloon that the positively charged object must be held to balance the balloon is 5.2 cm.

The force between the charges is determined by applying Coulomb's law.

F = kq₁q₂/r²

The downward force of gravity of the balloon is given as;

F = mg

When the two forces balances, the distance between the charges is calculated as follows;

[tex]mg = \frac{kq_1q_2}{r^2} \\\\r^2 = \frac{kq_1q_2}{mg} \\\\r = \sqrt{\frac{kq_1q_2}{mg} } \\\\r= \sqrt{\frac{(9\times 10^9)(85 \times 10^{-9})(63\times 10^{-9})}{(1.8 \times 10^{-3} \times 9.8)} } \\\\r = 0.052 \ m\\\\r = 5.2 \ cm[/tex]

Thus, the distance above the balloon that the positively charged object must be held to balance the balloon is 5.2 cm.

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Since the rock has a velocity of 3.5m/s at 40.0°, it will take the rock 0.46 s to hit the water again.

Since the rock is a projectile, we use the time of flight of a projectile to find the time it hits the water again

The time of flight of the rock is given by T = 2UsinФ/g where

Substituting the values of the variables into the equation, we have

T = 2UsinФ/g

T = 2 × 3.5 m/s × sin40.0°/9.8 m/s².

T = 7.0 m/s × 0.6428/9.8 m/s².

T = 4.4995 m/s ÷ 9.8 m/s²

T = 0.459 s

T ≅ 0.46 s

So, it will take the rock 0.46 s to hit the water again.

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Answer:

just know that if the volume is reduced by 10 the the pressure is increased by 10

Question:

How long must a 1500 N force act on a car to give it a momentum of 56000 kg-m/s starting from rest?​

Find out key variables:

Force: 1500 N

Momentum: 56,000 kg-m/s

Recall the formula: ΔMomentum (kg m/s) = Force (N) x Time Taken (s)

Solve:

56,000 = 1500 x time taken

time taken = 56,000/1500

time taken = 112/3

time taken = 37.33 seconds

The frequency of the light with the given wavelength in water is 3.75 × 10¹⁴ Hz.

Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.

Both frequency and wavelength are inversely proportional to each other.

Using the wavelength, frequecy and speed relation;

λ = v / f

Where λ is wavelength, v is speed and f is frequency.

Given the data in the question;

We know that frquency in water is the same as frequecy in air, it doesnt change due to medium.

From the expression above, the frequency of the light will be;

λ = v / f

f = Vw / λw

But,

Refractive index u = velocity of light in air / velocity of light in medium ( water )

So,

Vw = ( 3×10⁸m/s × 1 ) / 1.33

Vw = 2.25 × 10⁸m/s

Hence,

f = Vw / λw

f = ( 2.25 × 10⁸m/s ) / ( 6.0 × 10⁻⁷m )

f = 3.75 × 10¹⁴ s⁻¹

f = 3.75 × 10¹⁴ Hz

Therefore, the frequency of light that with the given wavelength in water is 3.75 × 10¹⁴ Hz.

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The frequency of oscillation given the moment of inertia of the tire around the peg will be f = 1/2π✓(g/2R).

Given I = 2MR²

Torque = Mgsin(theta)R

Here, w = 2πf.

f = 1/2π✓(MgR/I)

f = 1/2π✓(MgR/2MR²)

f = 1/2π(✓g/2R)

Therefore, the frequency of oscillation is f = 1/2π(✓g/2R).

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Both Gamma rays and Radio waves travel at the same speed when placed in a vacuum.

This is the type of wave of electric and magnetic fields propagating at the speed of light through empty spaces.

All electromagnetic waves such as Gamma rays and Radio waves travel at the same speed which is why option C was chosen.

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Answer:

Im pretty sure it's B. but im not 100% sure sry

Explanation:

Answer:

A: Anxious

Explanation:

got a 100% of Edge

Answer:

Both chemical and nuclear

Answer:

Explanation:

window!

The light most likely strikes on a window.

Refraction of light is defined as the bending of light when it travels from one medium to another.

Here,

When light falls on a smooth, reflecting surfaces like glass, mirror, water, it gets bounced back. This is known as the reflection of light.

But when a light ray strikes on the surface like, a window, the light will get refracted and as a result, when it passes through the glass, the path of the light is changed.

The light undergoes refraction twice, as the light enters and gets escaped from the window.

Hence,

The light most likely strikes on a window.

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For a puck moves 2.35 m/s in a -22 degree direction. A hockey stick pushes it for 0.215 s, changing its velocity to 6.42 m/s in a 50 degree direction the magnitude of the acceleration is mathematically given as

θ=71.4

Generally, the equation for the initial velocity of the puck is mathematically given as

v1=v1cosαi+v1sinαj

v1=(2.35)cos(−22.0)i+(2.35m)sin(−22.0)j

v1=2.1788820582i−0.8803254945j

v2=(6.42)cos(50.0)i+(6.42)sin(50.0)j

v2=4.1266964542i+4.9180053248j

hence,

a=v2−v1/Δt

[tex]a=(4.1266964542i+4.9180053248j) - (2.1788820582i-0.8803254945j)/0.215s[/tex]

a= 9.0596018419i+26.968980555j

In conclusion, the magnitude of acceleration

θ=tan−1(26.968980555/9.0596018419)

θ=71.431423019

θ=71.4

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Answer:

2.6 billion yrs old

Explanation:

3 = 12 (1/2)^n     n=2 half lives

2 * 1.3 bln = 2.6 bln

Answer:

How does the work done on a machine compare to the work done by a machine? Because of friction, the work done by a machine is always less than the work done on the machine. What changes can a machine make to a force? Size of force; direction of force; distance through which a force acts.

When the measured value of mass M becomes 2 M, the error in the measurement will be 0.00995 kg.

The percentage error is determined from the ratio of the error in meaurement to actual measurement.

Percentage error = (error / measurement) x 100%

Percentage error = (0.005 / 0.743) x 100%

Percentage error = 0.67%

New mass = 2 x 0.743

New mass = 1.486 kg

0.67 = (new error / 1.486) x 100%

0.0067 = new error / 1.486

new error = 0.0067 x 1.486

new error = 0.00995 kg

Thus, when the measured value of mass M becomes 2 M, the error in the measurement will be 0.00995 kg.

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Answer:

See below

Explanation:

Frequency =  3/9 = .3333 hz

period = 1/f = 3 sec

Answer:

D

Explanation:

D) The velocity was forty meters in 10 seconds, or 4 meters per second.

Actually according to physics there should be needed a force to move things but our mind does not produce a force ...Apart from myths ...is seems quite impossible to move a object with ur mind

-Thanks for reading

Answer: 38% efficiency

Explanation:

Given:
- Mass of box, 500.0kg

- Height lifted, 3.50m

- Force Applied, 10 000N

- Distance applied, 4.50m

Required:

% Efficiency, can be found through formula η = [useful energy output (Eout) ÷ energy input (Ein)] x100%

To calculate Eout, you need to find which energy transferred to the box is useful. In this case, it is the gravitional potential energy, which can be found by the formula Eg = mgh, where Eg = (500.0)(9.8)(3.50) = 17150J.

To calculate Ein, find the total energy that was inputted to the object, given by W = FΔd, where W = 45000J.

Now, plug in the values to the %eff formula:

(17150J ÷ 45000J) x100% ≈ 38%

Therefore % efficiency of the pulley is 38%.

A car that has a forward thrust of 3kN and accelerates from 20 m/s to 40 m/s in 10 s has a mass of 1500 kg. Thus, the mass of the car is the 1500 kg

From the question, we are to calculate the mass of the car.

From Newton's second law of motion, we have that

F = ma

Where F is the Net force

m is the mass

and a is the acceleration

Also, from one of the equations of linear motion, we have that

v = u + at

Then, we can write that

[tex]a = \frac{v-u}{t}[/tex]

Where v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time taken

Therefore,

[tex]F = m\frac{(v-u)}{t}[/tex]

From the given information,

u = 20 m/s

v = 40 m/s

t = 10 s

F = 3 kN = 3000 N

Putting the parameters into the equation, we get

[tex]3000 = m \frac{(40-20)}{10}[/tex]

[tex]3000 = m \times \frac{20}{10}[/tex]

3000 = 2m

Then,

m = 3000 ÷ 2

m = 1500 kg

Hence, the mass of the car is the 1500 kg.

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