Which of the following logic gates is a universal gate?

$A$ ball moving with velocity $2 \, m/s$ collides head-on with another stationary ball of double the mass. If the coefficient of restitution is $0.5$,then their velocities (in $m/s$) after collision will be

In free space,a shell moving with velocity $60\,m/s$ along the positive $x$-axis explodes into two pieces of mass ratio $1:2$ when it passes through the origin. After the explosion,the velocity of the centre of mass is ........ $m/s$.

Which of the following statements is incorrect regarding living organisms?

Which of the following is a non-living level of biological organization?

The coconut water and the edible part of coconut are equivalent to: