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The energy equivalent to a substance of ...

The energy equivalent to a substance of mass 1 g is

A

`18xx10^(13)J`

B

`9xx10^(13)J`

C

`18xx10^6J`

D

`9xx10^6J`

Text Solution

Verified by Experts

The correct Answer is:
B
Here,
Mass, m = 1 g = `10^(-3)kg`
According to Einstein's mass - energy relation , the energy equivalent of mass m is
`E=mc^2` (where c is the speed of light in vacuum)
`=(10^(-3) kg) (3xx10^8 ms^(-1))^2`
`=10^(-3) xx9xx10^(16) J = 9 xx 10^(13)J`
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