Calculate the number of seconds in $4$ days. (in $s$)

Fill in the blanks given below:
$(i)$ The symbol for the quantity of luminous intensity is .......... and the name of its $SI$ unit is ......... .
$(ii)$ The prefixes used for $10^{-18}$ and $10^{18}$ are ............ and ........... respectively.
$(iii)$ The $SI$ unit of density is ......... .
$(iv)$ In the ........ unit of temperature,its negative value is not possible.

Name the different systems of measurement used.

Pressure is determined as force per unit area of the surface. The $SI$ unit of pressure, Pascal is as shown below:
$1 \, Pa = 1 \, N \, m^{-2}$
If mass of air at sea level is $1034 \, g \, cm^{-2}$, calculate the pressure in Pascal.

If the speed of light is $3.0 \times 10^8 \ ms^{-1}$,calculate the distance covered by light in $2.00 \ ns$. (in $m$)

The temperature of $32^{\circ} C$ is equivalent to