$ATP$ase enzyme needed for muscle contraction is located in

The truth table for the system of four $NAND$ gates as shown in the figure is:

The structure of $XeOF_4$ is

From a solid sphere of mass $M$ and radius $R$,a cube of maximum possible volume is cut. The moment of inertia of the cube about an axis passing through its centre and perpendicular to one of its faces is

Which of the following compounds is formed by the addition of a mineral acid to an aqueous solution of borax?

Magnetic induction at the centre of a circular loop of area $\pi \ m^2$ is $0.1 \ T$. The magnetic moment of the loop is ( $\mu_0 = \text{permeability of air}$ ).