Question

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Question 25 1 pts A volume of air has temperature of O°C. An equal volume of air that is twice as hot has a temperature of O2°C O 100°C OOºC O 273°C Question 26 1 pts If you wish to cool your kitchen on a hot day by operating your refrigerator with its door open, then, strictly speaking, the kitchen temperature will O remain unchanged. O increase. decrease.

Answer 1

25) The answer is 273 ^oC
Initial temperature, T = 0 ^oC = 273 K
Final temperature = 2 * T
= 2 * 273 K
= 546 K
= 546 - 273 ^oC
= 273 ^oC
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26) The answer is increase
The heat taken from the area near the refrigerator's door is pushed back into the room through the back of the refrigerator. But this process is not 100 % efficient. During this process, some extra heat is added to the room due to the heating effects due to the work done on cooling the air by electricity. So, overall the room gets warmer.
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27) The answer is lose time (run slower)
The TIme period of the pendulum, T = 1/2 $\pi$ SQRT[L/g]
Where L is the length of the pendulum. At the top of the mountain, the value of g will be less compared with that of the sea level. So T increases in the top of the mountain, the pendulum takes more time to complete one swing and it will lose time.
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28) The answer is zero
The electric field will be still zero since all the charges will move towards the surface.