In the following list of activities classify them with respect to which interaction would help explain the situation. Use the interactions of gravity, electromagnetic, weak nuclear, or strong nuclear.
1. an apple falling from a tree |
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2. atomic bomb |
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3. magnetism |
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4. why rocks fall down and not up |
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5. listening to the radio |
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6. falling down from a bike |
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7. Solar system motion |
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8. radioactive decay of particles |
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9. a balloon sticking to a wall after rubbing the balloon |
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10. the Moon revolves around the Earth |
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11. the motion of a comet |
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12. weight |
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13. friction |
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14. protons and neutrons in a nucleus |
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15. tidal action of the oceans |
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16. x-rays |
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17. television |
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18. microwaves |
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19. shape of galaxies |
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20. light |