$\sinh^{-1}(2^{3/2})$ is equal to :

The shield-shaped cotyledon seen in monocot seeds is known as:

Find the points on the curve $\frac{x^2}{4} + \frac{y^2}{25} = 1$ at which the tangents are parallel to the $x$-axis.

$A$ long solenoid carrying a current produces a magnetic field $B$ along its axis. If the current is doubled and the number of turns per $cm$ is halved,the new value of magnetic field will be equal to

Which gas is released when $Na_2CO_3$ is heated?

An atomic power nuclear reactor can deliver $300\, MW$. The energy released due to fission of each nucleus of uranium atom $^{235}U$ is $170\, MeV$. The number of uranium atoms fissioned per hour will be