Answer
$0.12$ megatonne of TNT
Work Step by Step
To find the number of megatons of TNT equivalent to the impact, divide the energy from the TNT from the energy of impact to get $$=\frac{5\times 10^{14}J}{4.2\times 10^{15}J/MTofTNT}=0.12$$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 7 - Kinetic Energy and Work - Problems - Page 171: 3b
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