The power obtained in a reactor using `U^(235)` disintergration is `1000kW`. The mass decay of `U^(235)` per hour is

Options

A. 10 microgram
B. 20 microgram
C. 40 microgram
D. 1 microgram

Answer

C

Explanation

If we take `E=mc^(2), therefore mc^(2), therefore m` must be in kg.
Energy = power `xx` time
`E=1,000 kW xx (1 "hour")`
`=-10^(3) xx 10^(3) xx 60 xx 60`
`Deltam xx c^(2)=36 xx 10^(8)` J
`Deltam =(36 xx 10^(8))/(9 xx 10^(8) xx 10^(8))`
`Deltam = 40` microgram.