The number of significant figures in the quantity $0.00005041 \ J$ is

Which of the following measurements of length is the most precise? Why?
$(i) \ 2.0 \ cm$
$(ii) \ 2.00 \ cm$
$(iii) \ 2.000 \ cm$

If the value of resistance is $10.845 \, \Omega$ and the value of current is $3.23 \, \text{A}$,the value of potential with significant figures would be ........... $V$.

Three measurements are made as $18.425 \, cm$,$7.21 \, cm$,and $5.0 \, cm$. The addition should be written as ........ $cm$.

The number of significant figures in $3.78 \times 10^{22} \ kg$ is

Taking into account the significant figures,what is the value of $9.99\, m - 0.0099\, m$ (in $, m$)?