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InterviewSolution
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How much mass has to be converted into energy to produce electric power of 500 MW for one hour ?A. `2xx10^(-5)` kgB. `1xx10^(-5)` kgC. `3xx10^(-5)` kgD. `4xx10^(-5)` kg |
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Answer» Correct Answer - a Here, P=500 MW=`5xx10^8` W,t=1 h=3600 s Energy produced , E=P x t = `5xx10^8xx3600=18xx10^11` J As `E=mc^2` `therefore m=E/c^2=(18xx10^11)/((3xx10^8)^2)=(18xx10^11)/(9xx10^16)=2xx10^(-5)` kg |
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