Asked by Alice
A radioactive substance decays from 2.0kg to 1.6kg in 156 days.
What is the decay constant and the half life of the substance?
What is the decay constant and the half life of the substance?
Answers
Answered by
drwls
If T is the half life in days
(1.6)/2.0 = (T/156)^(1/2)
0.8 = 0.08006 T^1/2
9.992 = T^1/2
T = 99.8 days
The decay constant k is related to the half life by
k = ln2/T
(1.6)/2.0 = (T/156)^(1/2)
0.8 = 0.08006 T^1/2
9.992 = T^1/2
T = 99.8 days
The decay constant k is related to the half life by
k = ln2/T
Answered by
Mina
A weight of 40 N is suspended from a spring that has a constant of 200 N/m the system is subjected to a harmonic driving force of frequency 10.5 hz resulting in a forced- motion amplitude of 3 cm determine the max value of the driving force
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