The cut flowers and vegetables can be kept fresh for a long period by this plant hormone.

In a hypothetical system,a particle of mass $m$ and charge $-3q$ is moving around a very heavy particle having charge $q$. Assuming Bohr's model to be true for this system,the orbital velocity of mass $m$ when it is in its ground state is:

What is obtained when sodium metal is heated in a stream of dry ammonia?

$\int \frac{dx}{\sqrt{x}(x+9)}$ is equal to

The method of zone refining of metals is based on the principle of:

$A$ bullet fired into a fixed target loses half of its velocity after penetrating $3 \ cm$. How much further will it penetrate before coming to rest,assuming that it faces constant resistance to motion? (in $cm$)