Calculate the energy produced when $1 k g$ of substance is fully converted into energy. (Note: speed of light, $c = 3 \times 10^{8} m s^{- 1}$ )

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Solution

Energy, $E = m c^{2}$
GIven: mass, $m = 1 k g$
Speed of light, $c = 3 \times 10^{8} m s^{- 1}$
Therefore, Energy, $E = 1 \times {(3 \times 10^{8})}^{2} = 9 \times 10^{16} J$

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Similar questions

How much energy (in kJ) is produced when 2 kg of substance is fully converted into energy?

h = 6.63 \times 10^{- 34} J s

c = 3 \times 10^{8} m s^{- 1}

h = 6.6 \times 10^{- 34} J s a n d c = 3 \times 10^{8} m s^{- 1}

= 9 \times 10^{- 31} k g

= 1.6725 \times 10^{- 27} k g

= 1.6747 \times 10^{- 27} k g

= 3 \times 10^{8} m s^{- 1}

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