1.

A radioactive substance has a constant activity of 2000 disintegrations/minute. The material is separated into two fractions one of which has an initial activity of 1000 disintegrations per minute while the other fraction decays with t_((1)/(2))=24 hours. The total activity in both samples after 48 hours of separation is

Answer»

1500
1000
1250
2000

Answer :D


Discussion

No Comment Found