Units and Measu...

If $$C$$ and $$R$$ denote capacitance and resistance, then dimensions of $$CR$$ will be

It takes time $$8$$ min for light to reach from sun to the earth surface. If speed of light is taken to be $$3 \times 10^8$$ m $$s^{-1}$$, find the order of magnitude of distance from the sun to the earth in km.

Write the dimensions of $$\cfrac{d{\phi}_{B}}{dt}$$ where $$\phi_B$$ is magnetic flux through a coil.

The length, breadth and height of a glass slab are respectively $$50 cm$$, $$20 cm$$ and $$25 cm$$. Find the order of magnitude of volume of slab in Sl unit.

The radius of a hydrogen atom is $$0.5\mathring{A}$$. Find the order of magnitude of volume of $$1$$ mole hydrogen in $$m^3$$. Given that 1 mole of hydrogen has $$6.02 \times 10^{23}$$ hydrogen atoms.

Find the order of magnitude of the mass of the star, whose radius is $$384 \times 10^6$$ m and average density is $$4 \times 10^3$$ kg $$m^{-3}$$ :

The electric potential existing in space is $$V(x, y, z) = A (xy+ yz + zx)$$. Write the dimensional formula of $$A$$ :

The value due regard to significant figure  $$ 4.0\times 10^{-4}-2.5\times 10^{-6}$$ 

Round off 2.0082 to four significant figures.

Dimension of relative density is -