What is the energy equivalent of an object with a mass of 1.83 kg?

Use Einstein’s mass-energy equation, E = mc². With m = 1.83 kg and the speed of light c ≈ 3.00 × 10⁸ m/s, E = 1.83 × (3.00 × 10⁸)² = 1.647 × 10¹⁷ J. Rounded to three significant figures, that is 1.65 × 10¹⁷ J, choice A.

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