Units and Measurements — Prelims Questions

The length, breadth, and thickness of a rectangular sheet are measured as $15.3 pm 0.05,\text{cm}$, $12.8 pm 0.02,\text{cm}$, and $0.25 pm 0.01,\text{cm}$ respectively. The percentage error in the volume of the sheet is approximately:

Which of the following physical quantities has the same dimensions as energy?

If the unit of force is $100,\text{N}$, unit of length is $10,\text{m}$ and unit of time is $100,\text{s}$, what is the unit of mass in this new system?

The least count of a screw gauge is $0.01,\text{mm}$ and there are 50 divisions on its circular scale. The pitch of the screw gauge is:

The density of a material in CGS system is $4,\text{g/cm}^3$. In a system of units where unit of length is $10,\text{cm}$ and unit of mass is $100,\text{g}$, the value of density will be:

The number of significant figures in $0.00500,\text{kg}$ is: