1:The human body works as a heat engine, converting ____ percent of food energy

Question

1:The human body works as a heat engine, converting ____ percent of food energy to the mechanical energy necessary to carry on the daily physical activities while disposing the rest as waste heat


a)Less than 1% b)Between 1 to 5% c)About 15 to 25% d)About 60% e)Above 90%

2:Which of the following observations are consistent with the zeroth law of thermodynamics?

a)When we turn on a light bulb, some energy is lost as heat.


b) It is the basis of all measurements
c) There is a temperature below which is impossible to achieve

d) The ultimate fate of the universe is heat death

e) Entropy vanishes at zero absolute temperature




d)

Explanation / Answer

1) option 3 2) option b

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