#### Question

How much is this energy in MeV? (Speed of light = 3 × 10^{8} m/s)

#### Solution

The energy released in joules when 5 g (5/1000 kg ) of a material is completely converted into energy during a nuclear reaction is given by Einstein's equation as

` E=mc^2`

`=(5/1000)xx(3xx10^8)^2`

`=4.5xx10^14j `

(e) The energy in MeV is given by:

`1/(1.6xx10^-13)xx4.5xx10^-13j`

`(since 1meV=1.6xx10^-13j ) `

`=28xx10^27meV`

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Solution How Much is this Energy in Mev? (Speed of Light = 3 × 108 M/S) Concept: Alternative or Non-conventional Sources of Energy - Nuclear Energy.