| What does not happen when a nucleus splits |
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| What sort of reaction has happened when a hydrogen-3 atom becomes a helium-3 atom? |
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| The chain reaction in nuclear reactors needs the absorption of |
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| What do we call atoms with the same atomic number but different mass numbers? |
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| Which force causes an object to fall? |
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| When an object gains positive electrons it has negative charge, true or false? |
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| Does an object keep moving if the resultant force on it is zero? |
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| what is the unit of force |
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