Consider the following:
$A) 0.0025$
$B) 500.0$
$C) 2.0034$
Number of significant figures in $A, B$ and $C$ respectively,are

The number of significant figures in $60.0001$ is

One atmosphere is numerically equal to approximately

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

$2 \times 10^{8}$ atoms of carbon are arranged side by side. Calculate the radius of a carbon atom if the length of this arrangement is $2.4 \, cm$.

The triple point of water is $................$ $K$. (in $.16$)