The ratio between kinetic energy and the total energy of the electrons of a hydrogen atom according to Bohr's model is

The Biodiversity Act of India was passed by the Parliament in the year:

The molar heat of formation of $NH_4NO_{3(s)}$ is $-367.54 \ kJ$ and those of $N_2O_{(g)}$ and $H_2O_{(l)}$ are $+81.46 \ kJ$ and $-285.78 \ kJ$ respectively at $25 \ ^oC$ and $1.0 \ atm$ pressure. Calculate $\Delta U$ at $25 \ ^oC$ for the reaction:
$NH_4NO_{3(s)} \to N_2O_{(g)} + 2H_2O_{(l)}$ (in $kJ$)

The roots of the equation $x^3-14x^2+56x-64=0$ are in

$\cos \left[\cos ^{-1}\left(-\frac{1}{7}\right)+\sin ^{-1}\left(-\frac{1}{7}\right)\right]$ is equal to

In the circuit shown in the figure,neglecting source resistance,the voltmeter and ammeter readings will respectively be: