According to the HR diagram below, blue giants are in what temperature range?

A. 2,500 k - 5,000 k

B. 5,000 k - 10,000 k

C. 10,000 k - 20,000 k

D. 20,000 k - 40,000 k

Answer:

correct

Explanation:

all the answer are good cuc

Statement A  is not true in regard to the first law of thermodynamics. The first law of thermodynamics states that within an open system, the total energy of that system will remain constant. Is incorrect statement.

According to the Law of conservation of energy. Energy can not be created nor be destroyed, it can transfer from one to another form.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

The wrong statement is the first law of thermodynamics states that within an open system, the total energy of that system will remain constant.

The first law of the thermodynamics is valid only for the closed system.

The first law of thermodynamics states that within a closed system, the total energy of that system will remain constant.

Hence, statement A  is not true in regard to the first law of thermodynamics

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Your answer will be A. Rescue breathing and chest compressions.

Answer: Simple Machines are useful and important because they reduce effort or extend the ability of people to form tasks beyond their normal capabilities . So they help us in our daily lives by reducing the amount of effort it takes for humans to perform certain tasks .

HOPE IT HELPS YOU .PLEASE GIVE BRAINLIEST .THANKS .

Answer:

c thats the answer yep

Answer:

D.

Explanation:

The wire allows the current to follow the quickest path & will therefore follow the XY wire, restricting the energy source from reaching bulbs 1 and 2 which are beyond that wire.

Answer:

[tex]7.2 \times 10 {}^{11} newton[/tex]

Explanation:

[tex]the \: magnitude \: of \: the \: forc \: e \: can \: be \: calculated \: using \: coulombs \: formular \\ f = \frac{k \times q1 \times q2}{d {}^{2} } \\ f = \frac{9 \times 10 {}^{9} \times 100 \times 20 }{5 {}^{2} } \\ f = \frac{18000 \times 10 {}^{9} }{25 } \\ f = \frac{18000000000000}{25} \\ f = 7.2 \times 10 {}^{11} newton[/tex]

The work done to pull the object 7.0 m is the total area under the graph from 0.0 m to 7.0 m, determined as 245 J.

The area under force versus displacement graph is work done.

The total work done by pulling the object 7 m, can be grouped into two areas;

A1 = ¹/₂ bh

A1 = ¹/₂ x (2) x (20)

A1 = 20 J

A2 = ¹/₂(large base + small base) x height

A2  = ¹/₂[(7 - 2) + (7-3)] x 50

A2 = ¹/₂(5 + 4) x 50

A2 = 225 J

W = A1 + A2

W = 20 J + 225 J

W = 245 J

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Answer:

18.60  m/s

Explanation:

Original momentum = mv = 4000        with m = 115    

after collision   m = 115 + 100 = 215 kg

  but the total momentum is still the same (conserved)

          4000 = 215 v      shows v = 18.60 m/s

Answer:

18.60

Explanation:

(a) The equation relating to the acceleration of the two masses is a = F/(m₁ + m₂).

(b) The acceleration of both masses is 2.5 m/s².

(c) The magnitude  of the tension in the string is 1.25 N.

The equation relating to the acceleration of the two masses is given as;

F - T = m₂a  ---- (1)

T = m₁a      ---- (2)

F - m₁a  = m₂a

F = m₁a  + m₂a

F = a(m₁ + m₂)

a = F/(m₁ + m₂)

→       ←      →

T       T      F

The acceleration is calcuated as follows;

a = F/(m₁ + m₂)

a = 5/(0.5 + 1.5)

a = 5/(2)

a = 2.5 m/s²

T = m₁a

T = 0.5 x 2.5

T = 1.25 N

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From the laws of Newton, the balls experiences an equal force directed in opposite directions.

Collision is said to occur when on object bumps into another. Collisions are described by the law of conservation of linear mometum which ststes that momentum is neither created nor destroyed.

The question is incomplete hence we can not fully answer the question. However, from the laws of Newton, the balls experiences an equal force directed in opposite directions.

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For a system released from rest at θ = 0° when a constant couple moment M = 100 N.m is applied,  the speed of the 10-kg block is mathematically given as

V=4.33m/s

Generally, the equation for the workdone  is mathematically given as

W=T tehta<dtheta

W=100(90*\pi/180)

W=1.5707*100

W=1.57Nm

The change in potential energy across the pulley

dP=mgh

dp=10*9.81*111.8

dp=10.97J

For the thrid position, potential energy is

dP=mg(0.3)

dP=17.658J

dP'=17.658J-13.125

dP'=-4.532J

For 2nd position dP=0

The change in Kinectic energy across the pulley\

dK.E=0.5mv^2

For 1st

dk.E=0.5m(10)^2

2nd

dK.E=0.5Iw^2

dK.E=0.5(7.5*10^-3)(v^2/0.05)^2

3rd

2nd=3rd

In conclusion,

157.07=dKE+dP.E

157.07=5v^2+ (7.5*10^-3)(v^2/0.05)^2+10.97-4.53

V=4.33m/s

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Answer:

The car and the road have kinetic friction.

Explanation:

Because the car is getting a force of friction because of the kinetic energy caused by the engine.

Answer:

refraction

Explanation:

The new efficiency of the ideal engine rated at 50% is : 59%

Given data :

Inital exhaust temperature = 20ºC

Final exhaust temperature = - 30 ºC

The efficiency of an ideal engine can be calculated with the formula below

η = 1 - Texhaust / Tinput

Therefore :

Tinput = Texhaust / 1 - η ---- ( 2 )

where : Texhaust = 293 k ,   η = 0.50 ,

insert values into equation ( 2 )

Tinput = 293 / 1 - 0.50

           = 586 k

The new efficiency of the ideal engine ;

η = 1 - T'exhaust / Tinput

  = 1 - 243 / 586

  = 1 - 0.41 = 59%

Hence we can conclude that the new efficieny is 59%

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Answer:

Black holes:

A are the brightest objects in space.

B are the most well understood objects in space.

C pulse in a regular pattern.

D None of the choices are correct.

Explanation:

A black hole is a region of space where the pull of gravity is so strong that nothing can escape. It's a "hole" in the sense that things can fall in, but not out of it. It is "black" in the sense that not even light can escape.

I hope I helped you! :)

The rms current, in amperes, in the secondary winding is 0.5 A and the rms current, in milliamperes, in the primary winding is 31.25 mA.

The rms current, in amperes, in the secondary winding is calculated as follows;

V = IR

I = V/R

I = 7.5 / 15

I = 0.5 A

The rms current, in milliamperes, in the primary winding is calculated as follows;

[tex]\frac{I_p}{I_s} = \frac{V_s}{V_p} \\\\I_p = \frac{V_sI_s}{V_p}\\\\I_p = \frac{7.5 \times 0.5}{120} \\\\I_p = 0.03125\\\\I_p = 31.25 \ mA[/tex]

Thus, the rms current, in amperes, in the secondary winding is 0.5 A and the rms current, in milliamperes, in the primary winding is 31.25 mA.

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Answer:

500 gm

Explanation:

There may be some typos in your question post, here is my best guess of what you posted:

2.5 kg / 5000 kg /m^3 = .0005  m^3    water displacement

.0005 m^3 = 500 cm^3     for water this equals 500 gm

Answer:

R 44.4

Explanation:

The hazard from more material flows downhill are:

This is a condition which has the potential to cause damage or injury to a person or property.

Materials flowing downward means that there will erosion which may damage the roads, land for agriculture and utility poles.

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Answer:

Measuring cup and graduated cylinder

Explanation:

These tools measure the volume of liquid matter. Measuring cups are used frequently in cooking and provide measurements generally in ounces and grams. A graduated cylinder is used in laboratories and in research and allows for a greater degree of precision in measuring the volume.

The planets orbit the sun due to gravitational force of the sun on them which keep it in their orbits.

The first law of motion is also called Law of Inertia, the second law of motion is the Law of Mass and Acceleration, and the Third Law of Motion that have action and reaction forces.

The gravity of the Sun keeps the planets in their orbits. They stay and revolve in their orbits because there is no other force in the Solar System which can put pressure on them.

So we can conclude that planets orbit the sun due to gravitational force of the sun on them which keep it in their orbits.

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Answer:

Work = Force * Distance        definition of work

W = F * d

If one uses 1/2 the force to move an object, then he must move the force thru twice the distance to get the same work output.

Answer:

sorry im not good at math so sorry i cant help

Explanation:

For a particle that has a velocity that is 70 % of the speed of light and weighs 206.8 times the mass of an electron, the wavelength of this particle is mathematically given as

W= 739.47

Generally, the equation for the 70 % of the speed of light  is mathematically given as

70% of 3x10^8 = 2.1x10^8 m/s

Therefore

206.8*9.11x10^-31 = 1.88x10^-28 kg

In conclusion, The wavelength equation isTThe

wavelength= plancks constant / (mass*velocity)

Where

Plancks constant = 6.62x10^-34 m^2 kg/s

W=6.62x10^-34 / (1.88x10^-28/2.1x10^8)

W= 739.47

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Answer:

B The car has come to a stop and has zero velocity

Explanation:

I just did the Question

Based on data from world energy consumption, the estimated humanity’s current consumption of energy in one day is above 208 million joules per day.

Energy is the ability to do work. Therefore, energy consumption refers to the amount of energy used to do work.

Humans need energy for various purposes such as;

Due to rapid growth on population as well as technology, the human energy consumption is on the increase.

In 2020, the world primary energy consumption was 71,4 GJ per person for a world population of about 7.7 billion people.

Therefore, the estimated humanity’s current consumption of energy in one day is above 208 million joules per day.

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Hi there!

Recall Faraday's Law:

[tex]\epsilon = N\frac{d\Phi_B}{dt}[/tex]

ε = Induced emf (V)

N = Number of Loops

φ = Magnetic Flux (Wb)
t = time (s)

Thus, the induced emf is equivalent to the number of loops of the coil times the rate of change of the magnetic flux bounded by the area of the coil, so:

[tex]\epsilon = 2 \cdot \frac{47 - (-65)}{0.38} = 2 \cdot \frac{112}{0.38} = 589.47V =\boxed{ 5.9 \times 10^2 V}}[/tex]

**This is the magnitude of the induced emf. With Lenz's Law, however, the answer would be negative, which just indicates it is a resistive emf.

Answer: Okay so I don't know much but from what I do know

Ultrasound emits sound waves into the body and what bounces back is what they can see the grey shape is what is closest. It's all micro sound waves and cannot hurt an unborn baby.

Explanation:

Not sure if this is correct but it is what I remember being told.

Hope this helps!

Answer:

B) 1

Explanation:

There is not a coefficient before x, so automatically the answer is 1

Answer :-

Hi there!

[tex]\:\mathsf\red{Your\:answer\:is\:B.\:(1)}[/tex]

We know

Coefficient is the number or value which should be putten in front of the variable given.

Here,

'x' is the variable. Before x, there is no number mentioned. So the number would be 1.

[tex]\:\sf\purple{Hope\:this\:helps\:you!\::)}[/tex]