Question

find the momentum of a body of mass 100g and having kinetic energy 20j.​

Answer 1

Answer:

2kgm/s

Explanation:

kE =p^2/2m

20=p^2/2*0.1

20*2*0.1=p^2

p=2kgm/s

Answer 2

Answer:

two wires are made of the same material, so specific resistances of both wires are same

Explanation:

The principle of reversibility presupposes that the attenuation of a light ray during its passage through an optical medium because of reflection, refraction, and absorption is not affected by a reversal of the direction of the ray.