Calculate the reported result and the number of significant figures for $(41.6325 - 41.612)$.

$A$ picometre is written as

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.

If the volume of $15.9 \ g$ of carbon tetrachloride is $10 \ mL$,calculate its density.

The triple point of water is ............ $K$.

One fermi is $....$ (in $cm$).