A) 2 hours
B) 1.5 hours
C) 1 hours
D) 2.5 hours
Correct Answer: B
Solution :
Using \[\frac{A}{{{A}_{0}}}={{\left( \frac{1}{2} \right)}^{t/T}}\]or \[\frac{1}{32}={{\left( \frac{1}{2} \right)}^{7.5/T}}\] or \[{{\left( \frac{1}{2} \right)}^{5}}={{\left( \frac{1}{2} \right)}^{7.5/T}}\]or \[5=\frac{7.5}{T}\]i.e., T = 1.5 hoursYou need to login to perform this action.
You will be redirected in
3 sec