The calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is

An increase in pressure required to decrease the $200\,L$ volume of a liquid by $0.004\%$ in a container is ........... $kPa$. (Bulk modulus of the liquid $= 2100\,MPa$)

Which of the following oxides is amphoteric?

In a triangle,if $b=20, c=21$ and $\sin A=\frac{3}{5}$,then $a$ is equal to :

$A$ circular conducting loop of radius $R$ carries a current $I.$ Another straight infinite conductor carrying current $I$ passes through the diameter of this loop as shown in the figure. The magnitude of force exerted by the straight conductor on the loop is

$\int \frac{\sin x+8 \cos x}{4 \sin x+6 \cos x} d x$ is equal to