Question

What is the energy equivalent of an object with a mass of 2.5 kg? 5.5 × 108 J 7.5 × 108 J 3.6 × 1016 J 2.25 × 1017 J

Answer 1

We can use the Einsten's relation which states the equivalence between mass and energy:
$E=mc^2$
where
E is the energy
m is the rest mass of the object
c is the speed of light

By using this formula and m=2.5 kg, we can find the equivalent energy of the object:
$E=mc^2 = (2.5 kg)(3 \cdot 10^8 m/s)^2=2.25 \cdot 10^{17} J$

Answer 2

The answer is D. 2.25 × 1017 J