Units and Measu...

The diagram shows a cuboid block made from a metal of density $$2.5g/{cm}^{3}$$
What is the mass of the block?

In the density measurement of a cube, the mass an edge length are measured as $$\left( 10.00\pm 0.10 \right) kg$$ and $$\left( 0.10\pm 0.01 \right) m$$, respectively. The error in the measurement of density:

The dimension of Magnetic flux.

The dimension of $$ \frac {1}{2} \varepsilon _ o E^2 ( \varepsilon _ o $$  is the permitivity of free space and E is electric field) is 

If  x,v and a denote the displacement, the velocity and the acceleration of a particle
executing simple harmonic motion of time period T, then which of the following do not
change with time?

Which of the following does not have the dimension of force?

The mass of a neutral carbon atom in ground state is 

If $$P$$ and $$Q$$ have different non-zero dimensions, which of the following operations is possible?

Which of the following sets have different dimensions?