Express the following in scientific notation:
$(i)$ $0.0048$
$(ii)$ $234,000$
$(iii)$ $8008$
$(iv)$ $500.0$
$(v)$ $6.0012$

According to the significant figure convention, the result obtained by adding $12.11$, $18.0$, and $1.012$ is:

If an object weighs $275 \ lb$,what is its weight in $kg$? $(1 \ kg = 2.205 \ lb)$

If the value of Avogadro number is $6.023 \times 10^{23} \ mol^{-1}$ and the value of Boltzmann constant is $1.380 \times 10^{-23} \ J \ K^{-1}$,then the number of significant digits in the calculated value of the universal gas constant is

$1 \, \mu g = ........ \, mg$

At what temperature will the values of $^\circ C$ and $^\circ F$ be equal?