Question

how to take relative velocity​

Answer 1

Answer:

substance can be calculated by dividing density of substance with the density of water

Answer 2

When two objects are moving in same direction with velocities V,v where V > v.

then, relatives velocity will be V - v

When two objects are moving in opposite direction with velocities V,v where V > v.

with velocities V,v where V > v.then, relatives velocity will be V + v