$4 \ L \ atm$ is equal to (in $cal$)

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

What is the $SI$ unit of luminous intensity?

Which of the following has the highest energy value?

$1 \, kg \, m^2 \, s^{-2}$ is equal to ...

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