Which of the following is not a unit of energy?

Provide a table for the multiples and submultiples of various $SI$ units.

It is estimated that per minute each $cm^2$ of the Earth receives about $2 \ cal$ $(1 \ cal = 4.18 \ J)$ of heat energy from the Sun. This is called the Solar constant. In $SI$ units,the value is: (in $W/m^2$)

Which of the following is a unit of force?

Density of wood is $0.5 \, g/cm^3$ in the $CGS$ system of units. The corresponding value in $SI$ $(MKS)$ units is ........... $kg/m^3$.

Express $1$ atm pressure into $N/m^{2}$ and bar.