1. jackie carries a 100 n box a distance of 5 meters. what is the work done on the box?

2. seth runs up e flights of stairs. the first climb takes him 15 seconds. has the work done been affected? has the power done been affected?

3. popcorn can be cooked three different ways: using a microwave, an air popper, or on the stovetop. explain the transfer of thermal energy occurring in each situation.

4. water has a specific heat of 4.186 j/kg. c and while wood has a specific heat of 1.7 j/kg. c. which will heat up more quickly?
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1.about 16

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3.The air popper can pop 5.6 cups of popcorn in one minute, while the oil popper can only do 4.6 cups of popcorn

4. There are more molecules in a gram of water.

Explanation: Specific heat is the heat required by 1 gram of a substance to raise its temperature by .

As the specific heat of water (4.186 J/g°C) is more than that of ethanol (2.450 J/g°C) it means more energy is required to raise the temperature of a gram of water by 1°C. Which means the molecules are tightly bound and thus more molecules are contained in a gram of water.

Q= heat gained

m= mass of the substance

c = heat capacity    

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