Question

The distance between the sun will exhaust all of its energy in about ten billion years. By that time, it will have radiated about 1.2x10^-44(joules) of energy. Express this amount of energy in kilojoules

Answer 1

Answer:  $1.2(10)^{-47} kJ$

Explanation:

1 Joule ($1kJ$) is equivalent to $10^{3}J$. So, we have to make the conversion:

Joules   KiloJoules

$1kJ$ ---- $10^{3}J$

? ----------$1.2(10)^{-44}J$

$1.2(10)^{-44}J \frac{1kJ}{10^{3}J}=1.2(10)^{-47} kJ$