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Sep
24
awarded  Autobiographer
Jan
23
comment Why does a ballerina speed up when she pulls in her arms?
@Noldorin: Angular momentum is a vector quantity; both magnitude and direction are conserved, thus the need to use angular velocity vs. angular frequency.
Jan
22
comment Why does a ballerina speed up when she pulls in her arms?
Just one correction: \omega is actually the angular velocity in this context.
Jan
4
comment Would you be weightless at the center of the Earth?
Assuming we're ignoring gravity due to other bodies in the planetary system...?
Jan
4
comment Finding the volume of this irregular shape I have
Now, on the other hand if he measures the volume and the mass he may be able to identify the alloy if he didn't already have that information.