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Finger [1]
4 years ago
14

Which choice correctly describes what happens during heating?

Physics
1 answer:
Masja [62]4 years ago
7 0

Answer:

Option 4

Explanation:

During heating actually heat transfer takes place from a body at higher temperature to a body at lower temperature and the heat transfer takes place until both attain the same temperature  

Therefore heat transfer depends on the temperature of the systems

Now while comparing the thermal energies of the systems, if both the systems have same mass then the system which is at higher temperature has greater thermal energy when compared to the system which is at lower temperature

So in this case assuming that both the systems have same mass then the energy will leave the system with greater thermal energy and go into the system with less thermal energy as the system with greater thermal energy in this case will be at higher temperature and we are considering this assumption because thermal energy not only depends on temperature but also depends on mass of the system

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Two men standing on the same side of wall and at the same distance from It, such that they are 4oom apart when one fires a gun t
Mamont248 [21]

Answer:

1. 571.43m/s

2. 142.9m and 342.9m

Explanation:

1.Take the difference in time.

1.2-0.7=0.7 seconds

Take the distance between them and divide with differnce in time.

400÷0.7=571.43 seconds.

2.Take the time of the two men and divide by two.

0.5÷2= 0.25 secs

1.2÷2= 0.6 secs

multiply each with the velocity.

0.25×571.43=142.9m

0.6×571.43=342.9m

8 0
2 years ago
If I decrease the wavelength of an electromagnetic wave what will happen to the frequency of the wave?
Vinil7 [7]

This can be viewed as a decrease in the wavelength of the wave. A decrease in wavelength at a constant speed is associated with an increase in frequency since waves follow the equation v=f*λ, where λ is the wavelength and f is the frequency.


5 0
3 years ago
Turning a corner at a typical large intersection in a city means driving your car through a circular arc with a radius of about
Naddik [55]

Answer:

9.89 m/s.

Explanation:

Given that,

The radius of the circular arc, r = 25 m

The acceleration of the vehicle is 0.40 times the free-fall acceleration i.e.,a = 0.4(9.8) = 3.92 m/s²

Let v is the maximum speed at which you should drive through this turn. It can be solved as follows :

a=\dfrac{v^2}{r}\\\\v=\sqrt{ar} \\\\v=\sqrt{3.92\times 25} \\\\=9.89 m/s

So, the maximum speed of the car should be 9.89 m/s.

8 0
3 years ago
An object completes 2500 cycles in<br> 26s. The radius of motion is 3.5m.
Evgesh-ka [11]

Answer:

That statement is correct.

Explanation:

An object that completes 2500 cycles in 26 seconds has a radius of motion of 3.5.

7 0
3 years ago
Suppose you walk 17 m straight west and then 26.5 m straight north. What is the compass direction, in degrees measured West of N
garik1379 [7]

Answer:32.7

Explanation:

You must first make a right triangle with the two legs being 17 m west and 26.5 m north. To find the degree measurement west of north you must find the angle between the north leg and the hypotenuse. then just use inverse tangent of (17/26.5) which is 32 .7 degrees

6 0
3 years ago
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