A sample of `.^32P` initially shows activity of one curle.After 303 days the activity falls to `1.5 xx 10^(4) `dps.What is the half life of `.^32P`?

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0ms^-1 at right angles to the horizontal component of the earth's magnetic field, 0.30xx10^-4Wb m^-2 What is the direction of the emf?

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0ms^-1 at right angles to the horizontal component of the earth's magnetic field, 0.30xx10^-4Wb m^-2 What is the instantaneous value of the emf induced in the wire?

The activity of a radioactive sample decreased from 350 s^-1 to 175 s^-1 in one hour. Determine the half-life of the species

Disintegration rate of a sample is 10^10 per hour at 20 hrs from the start. It reduces to 6.3 xx 10^9 per hour after 30 hours. Calculate its half life andthe initial number ofradioactive atoms in the sample.