Question

Part A What mass of $^{235}_{92}U$ was actually fissioned in the first atomic bomb, whose energy was the equivalent of about 20 kilotons of TNT (1 kiloton of TNT releases $5 \times 10^{12}$ J)? Express your answer using one significant figure. $m_U = 1220$ kg Incorrect; Try Again; 4 attempts remaining Part B What was the actual mass transformed to energy? Express your answer using one significant figure. $m_{actual} = 1$ g Correct Correct answer is shown. Your answer 1.11 g was either rounded differently or used a different number of significant figures than required for this part.

          Part A
What mass of $^{235}_{92}U$ was actually fissioned in the first atomic bomb, whose energy was the equivalent of about 20 kilotons of TNT (1 kiloton of TNT releases $5 \times 10^{12}$ J)?
Express your answer using one significant figure.
$m_U = 1220$ kg
Incorrect; Try Again; 4 attempts remaining
Part B
What was the actual mass transformed to energy?
Express your answer using one significant figure.
$m_{actual} = 1$ g
Correct
Correct answer is shown. Your answer 1.11 g was either rounded differently or used a different number of significant figures than required for this part.

Part A
What mass of ^23592U was actually fissioned in the first atomic bomb, whose energy was the equivalent of about 20 kilotons of TNT (1 kiloton of TNT releases 5 × 10^12 J)?
Express your answer using one significant figure.
mU = 1220 kg
Incorrect; Try Again; 4 attempts remaining
Part B
What was the actual mass transformed to energy?
Express your answer using one significant figure.
mactual = 1 g
Correct
Correct answer is shown. Your answer 1.11 g was either rounded differently or used a different number of significant figures than required for this part.

Added by Jamie B.

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