One calorie is equal to (in $J$)

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

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

The number of significant figures in $6.0023$ are

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

Three successive measurements in an experiment gave the values $10.9$,$11.4042$,and $11.42$. The correct way of reporting the average value is