In order for two clumps of dust to stick together in an accretion disk, they must collide at roughly
A) 100 m/s.
B) 10 m/s.
C) 1 m/s.
D) 0.5 m/s.
E) 0.1 m/s or less.

Name: In order for two clumps of dust to stick together in an accretion disk, they must collide at roughly A) 100 m/s. B) 10 m/s. C) 1 m/s. D) 0.5 m/s. E) 0.1 m/s or less.
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Question

Quizplus · Accepted Answer

Dust particles in an accretion disk need to collide at very low speeds, typically 0.1 m/s or less, to stick together due to the weak forces involved.

In Order for Two Clumps of Dust to Stick Together