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13 July, 22:53

Accretion is defined as:

A. Gravity that pushes matter in a circular manner into an outer source.

B. The disk of material surrounding a black hole.

C. Gravity that pulls matter inward in a spiraling matter.

D. None of the above.

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  1. 14 July, 00:36
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    Answer: C. Gravity that pulls matter inward in a spiraling matter.

    Explanation:

    In astrophysics, particles are pulled towards a massive object due to gravity which further attracts more particles. A disk of particles is formed around the object. Hence, we can define Accretion as a process in which particles are accumulated in a form of a disk of surrounding a massive object (like a black-hole) due to gravity which pulls the matter inwards and matter spirals around the massive object. Galaxies, planets etc. are formed out of accretion process. Thus, the correct option is C.
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