Questions
When undergoes fission, 0.05% of its original mass is changed into energy. How much energy is released if 2kg of undergoes fission?
detailed solution
Correct option is A
Mass fissioned =0.05100×2kg=10−3kg Now using E=mc2, ⇒E=10−3×9×1016 ⇒E=9×1013JTalk to our academic expert!
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A 1 MeV positron and a 1 MeV electron meet each moving in opposite directions. They annihilate each other by emitting two photons. If the rest mass energy of an electron or a positron is 0.51 MeV, the wavelength of each photon is . The value of x is [Take h = 6.6210-34]
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