IIT-JEE Exam

To derive the Einstein mass - energy relation

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IIT-JEE Other Question

The density of a substance is 8 g/cm3. Now
we have a new system in which unit of length
is 5cm and unit of mass 20g. Find the density
in this new system When a small sphere moves at low speed
through a fluid, the viscous force F opposing
the motion, is found experimentaly to depend
on the radius ‘r’, the velocity v of the sphere
and the viscosity η of the fluid. Find the force
F (Stoke’s law)