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

3.6 × 10^16 J

This can be calculated using the formula E = mc^2, where E is the energy equivalent, m is the mass, and c is the speed of light (approximately 3 x 10^8 m/s). Plugging in the values, we get:

E = 2.5 kg * (3 x 10^8 m/s)^2
E = 2.5 kg * 9 x 10^16 m^2/s^2
E = 2.25 x 10^17 J

So the energy equivalent of an object with a mass of 2.5 kg is 2.25 x 10^17 J.