Insects belong to which phylum?

$A$ body of mass $1\, kg$ is thrown upwards with a velocity $20\, m/s$. It momentarily comes to rest after attaining a height of $18\, m$. How much energy is lost due to air friction? $(g = 10\, m/s^2)$

The accessory glands of the human male reproductive system are:

Which of the following is not a characteristic property of chemical equilibrium?

$\int \frac{dx}{\sqrt{x-x^2}}$ is equal to

The half-life of $Ra^{226}$ is $1620$ years. Calculate the number of atoms that decay in one second in $1 \ g$ of radium (Avogadro number $= 6.023 \times 10^{23}$).