Which part of the ovary in mammals acts as an endocrine gland after ovulation?

The element used by Rutherford in his famous scattering experiment was

Among the following series of transition metal ions,the one where all metal ions have $3d^2$ electronic configuration is

Equilibrium constant for the reaction $H_2O_{(g)} + CO_{(g)} \rightleftharpoons H_{2(g)} + CO_{2(g)}$ is $81$. If the velocity constant of the forward reaction is $162 \ L \ mol^{-1} \ s^{-1}$,what is the velocity constant (in $L \ mol^{-1} \ s^{-1}$) for the backward reaction?

The resistance across $M$ and $N$ in the given figure is

Two sides of a triangle are given by the roots of the equation $x^2-5x+6=0$ and the angle between the sides is $\frac{\pi}{3}$. Then,the perimeter of the triangle is