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2
questions
2
votes
1
answer
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Gravitational collapse - proof that energy dissipation is required?
As an undergraduate, I took a short course on astrophysics, where I encountered the Jeans mass. This is the critical mass for a spherical cloud of interstellar gas above which the cloud is predicted ...
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1
vote
2
answers
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Angular momentum of the center of mass of yo-yo reaching the end
I am a physics undergrad, and I know only a basic stuff about the subject.
Yesterday, I was taught about the angular momentum of a yo-yo and
my professor said that when the yo-yo hits the end of the ...
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