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What is temperature? What is heat? |
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Explain why most materials become less dense as their temperature is increased. |
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Would the tight packing of more insulation, such as glass wool, in an enclosed space increase or decrease the insulation value? Explain. |
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A true vacuum bottle has a double-walled, silvered bottle with the air removed from the space between the walls. Describe how this design keeps food hot or cold by dealing with conduction, convection, and radiation. |
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Why is cooler air found in low valleys on calm nights? |
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Why is air a good insulator? |
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Explain the meaning of the mechanical equivalent of heat. |
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What do people really mean when they say that a certain food "has a lot of Calories"? |
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A piece of metal feels cooler than a piece of wood at the same temperature. Explain why. |
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Explain how the latent heat of fusion and the latent heat of vaporization are "hidden." |
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What is condensation? Explain, on a molecular level, how the condensation of water vapor on a bathroom mirror warms the bathroom. |
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Which provides more cooling for a Styrofoam cooler, one with 10 lb of ice at 0°C or one with 10 lb of ice water at 0°C? Explain your reasoning. |
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Explain why a glass filled with a cold beverage seems to "sweat." Would you expect more sweating inside a house during the summer or during the winter? Explain. |
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Explain why a burn from 100°C steam is more severe than a burn from water at 100°C. |
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Briefly describe, using sketches as needed, how a heat pump is able to move heat from a cooler region to a warmer region. |
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Which has more entropy—ice, liquid water, or water vapor? Explain your reasoning. |
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Suppose you use a heat engine to do the work to drive a heat pump. Could the heat pump be used to provide the temperature difference to run the heat engine? Explain. |
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