What do an earthquake wave and a light wave have in common?
2 answers:
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Explanation:
It is given that, a solid metal sphere of diameter D is spinning in a gravity-free region of space with an angular velocity of ω.The sphere is slowly heated until it reaches its melting temperature, at which point it flattens into a uniform disk of thickness D/2.
The angular momentum remains conserved in this case. The relation between the angular momentum and the angular velocity is given by :
Where
are moment of inertia of sphere and the disk respectively
Here, volume before = volume after
Initial angular momentum,
..........(1)
Final angular momentum,
............(2)
From equation (1) and (2) :
Hence, this is the required solution.