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Question: 

A dose of 4.0 Sv of $\gamma$ rays in a short period would be lethal to about half the people subjected to it. How many grays is this?

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

Quick Answer: 

$4.0 \textrm{ Gy}$

Giancoli 7th Edition, Chapter 31, Problem 40

(0:39)

Chapter 31, Problem 40 is solved.

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