A dust particle has a rest energy (mass) of $1.0 \mu \mathrm{g}$. In joules, this rest energy is closer to:
A) $10^{17} \mathrm{~J}$
B) $10^{11} \mathrm{~J}$
C) $10^{8} \mathrm{~J}$
D) $10^{-3} \mathrm{~J}$
E) $10^{-23} \mathrm{~J}$
F) Other (specify)

Question

Quizplus · Accepted Answer

In SI units, the rest energy is $E=m c^{2}=\left[10^{-9} \mathrm{~kg}\right]\left[3.0 \times 10^{8}\right]^{2} \approx 10^{17-9}=10^{8} \mathrm{~J}$.

A Dust Particle Has a Rest Energy (Mass) Of 1.0μg1.0 \mu \mathrm{g}1.0μg

A Dust Particle Has a Rest Energy (Mass) Of $1.0 \mu \mathrm{g}$