1.

The radioactive decay rate of a radioactive element is found to be 10^(3) dps at a certain time . If the half life of element is 1 sec , the decay rate after 1 sec , is ….and after 3 sec , is …….

Answer»

500 , 125
125500
`10^(3) , 10^(3)`
`100 , 10`

Solution :`1000 dps overset( 1" SEC")(to) 500 overset("1SEC")(to) 250 overset("1 sec") (to) 125`


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