Calculate the average life of `79A^(Au^(198))` leaving `t^(1//2)` = 150 days.

Determine the average life of U^(238) having t^(1//2) = 140 days.

A circular coil of radius 8.0 cm and 20 turns, is rotated about its vertical diameter with an angular speed of 50 rad s^(-1) in a uniform horizontal magnetic field of magnitude 3.0xx10^(-2)T . Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance 10 Omega , calculate the maximum value of current in the coil. Calculate the average loss due to joule heating . Where does this power come from ?

Calculate the half life and mean life of Radium -226 of activity 1Ci, Given the mass of Radium - 226 is 1 gram and 226 gram of radium consists of 6.023xx10^23 atoms.

Calculate the decay constant for Ag^(108) if its half life is 2.31 minutes.

Wooden artifact and freshly cut tree are having 7.6 and 15.2 counts min-1 ga^(-1) of carbon (t^(1//2) = 5700 "years") respectively. Calculate the age of the artifact.

A and B are two radioactive elements. The mixture of these elements show a total activity of 1200 disintegrations/minute. The half life of A is 1 day and that B is 2days. What will be the total activity after 4days? Given: The initial number of atoms in A and B are equal

Calculate the half-life period of a first order reaction if rate constant is 0.45 mi n^(_1) .

Calculate the partial pressures of O_2 and H_2 in a mixture of 3 moles of O_2 and 1 mole of H_2 at S.T.P.