A radioactive substance of 1 g is reduced to 2.1 mg in 5 years by alpha decay.
Calculate the half-life of the substance
1
Expert's answer
2018-04-02T10:42:08-0400
Let us write the radioactive decay law in the form M(t)=M_0 2^((-t)⁄T).(1) Here M(t) is the mass of substance at time t, М_0 is the mass of substance at initial moment, T- is the half-life. From equation (1) we obtain T=tln2/(ln M_0/M(t) )=0.562yrs.
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Vitika
02.04.18, 06:50
stone A is thrown horizontally with speed 10 m/s. At the same time
stone B freely falls vertically downwards. Calculate the velocity B
wrt A after 10s. a. 10 b.10root101 c.root101 d 0
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stone A is thrown horizontally with speed 10 m/s. At the same time stone B freely falls vertically downwards. Calculate the velocity B wrt A after 10s. a. 10 b.10root101 c.root101 d 0
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