The decay constant of -238-U is 4-9 times 10-18- s-1- -a- What is the average -life of -238-U - -b- What is half-life of -238-U - -c- By what factor does the activity of a -238-U sample decreases in 9 times 10-9 years -

Question

The decay constant of  -238-U is 4-9 times 10-18- s-1-  -a- What is the average -life of  -238-U - -b- What is half-life of  -238-U - -c- By what factor does the activity of a  -238-U  sample decreases in  9 times 10-9  years -

Toppr Admin · Accepted Answer

The decay constant of $$ ^{238}U$$ is $$4.9 \times 10^{-18} s^{-1} $$ (a) What is the average -life of $$ ^{238}U $$? (b) What is half-life of $$ ^{238}U $$? (c) By what factor does the activity of a $$ ^{238}U $$ sample decreases in $$ 9 \times 10^9 $$ years ?