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A solid sphere of radius 4cm has a mass of 64kg.what will be the mass of a shell of the same metal whose internal and external radii are 2cm and 3cm respectively?Show working
5 years ago

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oobleck
The 2cm sphere has 8/64 the volume of the 4cm sphere
The 3cm sphere has 27/64 the volume of the 4cm sphere
So the mass of the shell will be 27-8 = 19 kg
5 years ago

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