Question

What is accretion? Describe accretion phenomena, energy density, fluid velocity and mass accretion rate?

Answer 1

1. Accretion-

In a general term , accrtion is defined as, a gradual increament in the size of a substance by the buildup of matter ue to gravity or the process of growth bye gradual buildup.

In this process, matter get together and amke th gradual increase in the size of an object.

2. Accretion phenomena-

Accretion is the gradual increament of anything eith time. If we talk in the planetary scienc, th accretion phenomena is occured when solid agglomerates to form large numbers of particle and planets are formed.

3. Energy Density-

In term of accretion , energy density is defined as the amount of energy stored in a given system.

4. Fluid Velocity-

Fluid velocity is described as, it is the rate of flow of fluid per unit time flowing through a unit area.

5. Mass Accretion Rate-

It is the total amount of energy released within the accrein disk is called mass accretion rate or it can be states , the rate at which  Accretion can occur.