Question

what is real and apparent depth

Answer 1

Real depth: the actual distance of an object beneath the surface, as would be measured by submerging a perfect ruler along with it. 

Apparent depth: what depth the object appears to have due to the refraction of the path of the light used for imaging.

Answer 2

Answer:

today is is zero and

Explanation:

a particle is in mechanical equilibrium if the net force on that particle is zero. By extension, a physical system made up of many parts is in mechanical equilibrium if the net force on each of its individual parts is zero