The Young's modulus of a wire is $Y$. If the energy per unit volume is $E$,then the strain will be

Hydrolysis of $NCl_3$ gives $NH_3$ and $X$. Which of the following is $X$?

What is the function of mycorrhiza?

$A$ uniform rod of mass $M$ and length $L$ is placed on a smooth horizontal surface. $A$ horizontal force $F$ is applied at one end of the rod perpendicular to its length. The acceleration of the centre of mass of the rod is:

Let $a, b, c$ be distinct non-negative numbers. If the vectors $a \hat{i} + a \hat{j} + c \hat{k}$,$\hat{i} + \hat{k}$,and $c \hat{i} + c \hat{j} + b \hat{k}$ lie in a plane,then $c$ is:

The modulus and amplitude of $\frac{1 + 2i}{1 - (1 - i)^2}$ are