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दस लाख किलोवाट आवर ऊर्जा के तुल्य द्रव्यमान की गणना कीजिए |

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दस लाख किलोवाट आवर ऊर्जा के तुल्य द्रव्यमान की गणना कीजिए |
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दिया है - `E=10xx10^(6)` किलोवाट आवर
`=10xx10^(6)xx3.6xx10^(6)" जूल"`
`=3.6xx10^(13)` जूल
अब सूत्र- `" "E="mc"^(2)` से
`m=(E)/(c^(2))=(3.6xx10^(13))/((3xx10^(8)))=(3.6xx10^(13))/(9xx10^(6))`
`=0.4xx10^(-3)" kg"`
`=4xx10^(-4)" kg."`
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