-57-textrm-Co- decays by electron capture- Its half life is 272 days- Find the activity left after a year present activity is 2mu Ci0-39 mu Cinone of these0-788 mu Ci0-431 mu Ci

Question

Toppr Admin · Accepted Answer

-x3BB- - -xA0-0-693t1-2 - 2-95-xD7-10-x2212-8s-x2212-1

$^{57} Co$ decays by electron capture. Its half life is $272$ days. Find the activity left after a year if present activity is $2 μ$ $C i$
$0.39$ $μ$ $C i$
none of these
$0.788$ $μ$ $C i$
$0.431$ $μ$ $C i$

$λ$ = $\frac{0.693}{t_{1 / 2}}$ = $2.95 \times 10^{- 8} s^{- 1}$

57Co decays by electron capture. Its half life is 272 days. Find the activity left after a year if present activity is 2μ Ci0.39 μ Cinone of these0.788 μ Ci0.431 μ Ci

λ = 0.693t1/2 = 2.95×10−8s−1

$^{57} Co$ decays by electron capture. Its half life is $272$ days. Find the activity left after a year if present activity is $2 μ$ $C i$
$0.39$ $μ$ $C i$
none of these
$0.788$ $μ$ $C i$
$0.431$ $μ$ $C i$

$λ$ = $\frac{0.693}{t_{1 / 2}}$ = $2.95 \times 10^{- 8} s^{- 1}$