As a result of this flow of energy from a region of high temperature to a region of low temperature, what happens?

A. The warmer materials cool down and cooler materials warm up

B. Both materials reach absolute zero

C. Only the cooler material changes temperature

D. Energy flows from low to high temperature

A certain gas process ends in its original thermodynamic state. Of the following, which is possible as the net result of the process?

A. The gas absorbs 50 J of energy as heat and does 50 J of work

B. The gas absorbs 50 J of energy as heat and does 100 J of work

C. The gas releases 50 J of energy as heat and does 50 J of work

D. The gas does no work but releases 50 J of energy as heat

Everyday Science · Physics in Everyday Life · page 41 of 41

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401.
The is a heat exchanger used to transfer heat from the refrigerator.
Correct Answer: D. Condenser
One-liner
The condenser is a heat exchanger used to transfer heat from the refrigerator to the surrounding environment.
402.
Which is used in measuring of high temperatures?
Correct Answer: A. Thermo-electric pyrometers
One-liner
Thermo-electric pyrometers are used for measuring high temperatures.
403.
As a result of this flow of energy from a region of high temperature to a region of low temperature, what happens?
Correct Answer: A. The warmer materials cool down and cooler materials warm up
One-liner
As a result of heat flow from a region of high temperature to a region of low temperature, the warmer materials cool down and cooler materials warm up until thermal equilibrium is reached.
404.
A certain gas process ends in its original thermodynamic state. Of the following, which is possible as the net result of the process?
Correct Answer: A. The gas absorbs 50 J of energy as heat and does 50 J of work
One-liner
For a cyclic thermodynamic process returning to its original state, the net change in internal energy is zero, so according to the first law (ΔU = Q − W), the heat absorbed must equal the work done — here 50 J absorbed as heat and 50 J of work done.