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A car is going down a hill and is also slowing down as it approaches a...

  1. A car is going down a hill and is also slowing down as it approaches a stop sign. How is the car’s potential energy changing? How is the car’s kinetic energy changing? To what other form does energy go? Explain your answers.

  2. Which has the greater amount of internal energy, an iceberg or a cup of hot coffee? Defend your answer.

  3. Consider two glasses, one filled with water and the other half full, with the water in the two glasses being at the same temperature. In which glass are the water molecules moving faster? In which is there greater internal energy? In which will more heat be required to increase the temperature by 1◦C? Explain.

  4. If the specific heat of water were less, would a nice hot bath be a longer or a shorter experience? Explain.

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