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

Dimensions of pressure are the same as that of

The candela is the luminous intensity,in a given direction,of a source that emits monochromatic radiation of frequency '$A$' $\times 10^{12}$ hertz and that has a radiant intensity in that direction of $\frac{1}{B}$ watt per steradian. '$A$' and '$B$' are respectively

Using the rules for significant figures,the correct answer for the expression $\frac{0.02858 \times 0.112}{0.5702}$ will be .... .

The diameter of a zinc atom is $2.6 \, \mathring{A}$. Calculate $(a)$ the radius of the zinc atom in $pm$ and $(b)$ the number of atoms present in a length of $1.6 \, cm$ if the zinc atoms are arranged side by side lengthwise.

The $SI$ unit of pressure is