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Question: 

When a uranium nucleus at rest breaks apart in the process known as fission in a nuclear reactor, the resulting fragments have a total kinetic energy of about 200 MeV. How much mass was lost in the process?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$4 \times 10^{-28} \textrm{ kg}$

Giancoli 7th Edition, Chapter 26, Problem 22

(0:55)

Chapter 26, Problem 22 is solved.

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