If the fraction of the atoms of a radioactive material left after 120years is \(\frac{1}{64}\), what is the half-life of the material?  \(\frac{1}{64}\)

In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?

The time rate of loss of heat by a body is proportional to the

A positively charged rod X is brought near an uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that Y has

Electrical appliances in homes are normally earthed so that