Physics
WAEC 2011
The change in mass of fuel during a nuclear reaction is 2.0 x 10
-27 kg. Calculate the amount of energy released. (Speed of light = 2.0 x 10
8ms
-1)
-
A.
1.8 x 10-10J
-
B.
9.0 x 10-11J
-
C.
6.0 x 10-19J
-
D.
1.2 x 10-45J
Correct Answer: Option A
Explanation
Q = \(\Delta MC^2\)
= 2 x 10-27(3 x 10)2
= 1.8 x 10-10J
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