A solution containing active cobalt `60/27` Co having activity of `0.8 muCi` and decay constant `lambda` is injected in an animal's body. If `1cm^(3)` of blood is drawn from the animal's body after 10hrs of injection , the activity found was 300 decays per minute. What is the volume of blood that is flowing in the body ? (`1 Ci = 3.7 xx 10^(10)` decays per second and at `t = 10` hrs `e^(-lambdat) = 0.84`)
If in an old sample of wood of 10g the decay rate is 30 decays per minute, the age of the wood is
A small quantity of solution containing Na^(24) radio nuclide (half-life 15 hours) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm^(2) taken after 5 hours shows an activity of 296 disintegrations per minute. Determine the total volume of blood in the body of the person. (1 curie =3.7xx10^(10) disintegrations per second.)
The number of alpha -particles emitted per second by 1g fo .^(226)Ra is .7 xx 10^(10) . The decay constant is:
A small quantity of solution containing Na^24 radio nuclide (half-life=15 h) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1cm^3 taken after 5h shows an activity of 296 disintegrations per minute. Determine the total volume of the blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of person. (1 curie =3.7 xx 10^10 disintegrations per second)
A small quantity of solution containing Ne^(24) radio nucliode (half life = 15 hour ) of activity 1.0 microcurlar is injected into the blood of a person A sample of the blood of volume 1 cm^(3) taken a after 5 hour shown an activity of the blood in the body of the person . Assume that redicative solution mixed uniformly in the blood of the person (1 curie = 3.7 xx 10^(10) disntegrations per sound)
The activity of a radioactive elements (decay constant lambda ) becomes (1)/(3) of initial activity A_(0) in 9 years then the decay constant after 9 years will :
A small quantity of a solution containing N^(24) radio-nuclide of half-life T and activity R_(0) is injected into blood of a person. 1 cm^(3) of sample of blood taken from the blood of the person shows activity R_(1) . If the total volume of the blood in the body of the person is V , find the timer after which sample is taken.
The number of alpha - particle emitted per second by 1 g of Ra-226 is 3.7xx10^(10) . Find the decay constant
A small amount of solution containing a radioactive nucleide A""^(x) was administrated into the blood of a patient. The activity of the nucliede id 2xx10""^(3) dps. Its half life is 15 hours. After 5 hours a sample of the blood drawn out from the patient. It,s activity was 16 dpm per mL. What is the volume of the 'blood' in the patient? (Log(1.26)=0.1)
