The coefficients of apparent expansion of a liquid when determined using two different vessels $A$ and $B$ are $\gamma_1$ and $\gamma_2$,respectively. If the coefficient of linear expansion of the vessel $A$ is $\alpha$,the coefficient of linear expansion of the vessel $B$ is

The radius $R$ of the soap bubble is doubled under isothermal conditions. If $T$ is the surface tension of the soap bubble,the work done in doing so is given by: (in $\pi R^{2} T$)

Which element is estimated by the Carius method?

In a transistor,the collector current is always less than the emitter current because:

If one side of a triangle is double the other and the angles opposite to these sides differ by $60^{\circ}$,then the triangle is