Asample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay. if after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?

15.8 year

Explanation:

This this a first order decay reaction first order decay reaction is that reaction in which the rate of reaction is linearly depend on the concentration of reactants. for the first order decay the equation is given as

= -Kt

where =initial activity and A is the activity at time t K is a rate constant

using above equation = -K×1.10

K=0.043809 /year

Half life=

=

=15.8 year

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.