Question

state law of conservation of angular momentum. prove that angular momentum of a particle is equal to twice the product of its massand areal ​

Answer 1

Because boiling point of alcohol= 78°C

And, that of water=100°C

Difference between their boiling points= (100-78)°C=22°C which is smaller than 25°C...

Answer 2

Angular momentum, L = mvr

Where m = mass of particle; v = Velocity of particle; r = distance.

Areal Velocity, A = vr/2

Where v = velocity of particle; r = distance.

By subsitituting the value of v from Areal velocity ie.

v = 2A/r

By subsitituting the above value of v in the expression of L, we get

L = m × 2A/r × r = 2mA.

Hence proved.