| 1. | Mechanical energy is the sum of
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| a. | | Kinetic eneergy and gravitational potential energy |
| b. | | sound energy and chemical potential energy |
| c. | | thermal energy and electrical energy |
| d. | | all the above
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| 2. | Scientifically, person's weight is measured in |
| a. | | newton's |
| b. | | kilograms |
| c. | | grams |
| d. | | m/s
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| 3. | the area under the line on the graph in is equal to |
| a. | | 50 N/m |
| b. | | 0.020 m/N |
| c. | | 2.0 J |
| d. | | 1.0 J
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| 4. | A spring has a spring constant of 50 N/m. In order to increase the length of the spring from 3.0 m to 5.0m , the extra force needed would be |
| a. | | 250 N |
| b. | | 150 N |
| c. | | 100 N |
| d. | | 50 N
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| 5. | In explaining matter and energy, it is true that |
| a. | | matter is made of atoms and moleculs that are constantly in motion |
| b. | | as object become hotter, their particles move faster |
| c. | | thermal energy transfers from one part of an object to another by means of collision |
| d. | | all the above
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| 6. | When a heat pump is used in the winter, evaporation occurs |
| a. | | outdoors to release heat |
| b. | | indoors to absorb heat |
| c. | | outdoors to obsorb heat |
| d. | | indoors to release heats
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| 7. | Renewable energy resources include |
| a. | | solar engery, natural gas,and biomass energy |
| b. | | nuclear fission, natural gas, and solar energy |
| c. | | wind energy, tidal energy, and biomass energy |
| d. | | naural gas, tidal energy, and hydraulic energy
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