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

Which of the following units represents the largest amount of energy?

How many significant figures should be present in the answer of the following calculations?
$(i)$ $\frac{0.02856 \times 298.15 \times 0.112}{0.5785}$
$(ii)$ $5 \times 5.364$
$(iii)$ $0.0125 + 0.7864 + 0.0215$

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

Write a note about The International System of Units $(SI)$.

The number of significant figures in $50000.020 \times 10^{-3}$ is ..... .