Q. The energy equivalent of 0.5 g of a substance is :
A) $4.5 \times 10^{13}$ J
B) $1.5 \times 10^{13}$ J
C) $0.5 \times 10^{13}$ J
D) $4.5 \times 10^{16}$ J
Explanation
[Solution] $E = mc^2 = 0.5 \times 10^{-3} \times 9 \times 10^{16} = 4.5 \times 10^{13}$ J. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.