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If a mass of 3.6 g is fully converted into energy , how many kilowatt hour of electical energy will be obtained ? |
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Answer» Solution :The energy OBTAINED is `E = mc^(2) = (3.6 xx 10^(-3) KG ) (3 xx 10^(8) m s^(-1) ) ^(2) = 32.4 xx 10 ^(13) J. Now 1 kilowatt hour `=10^(3) J s ^(-1) xx 3600 s = 3.6 xx 10(6) J`. THUS , `E = 32. 4 xx 10^(13) / 3.6 xx 10^(6) kWh = 9 xx 10^(7) kWh. |
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