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physics

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astarmathsandphysics:

--- Quote from: emi on May 10, 2009, 10:49:32 pm ---i dnt get the formula u used .. and how u knew that m=1/2 ?
could u please explain little more .. i appreciate your help .  thanks alot

--- End quote ---

Use the formula Vm=1/3pi*r3

godfather93:
how do you know Vm is 1/3*pi*r3

emi:
yeah ,, how can anyone com up with that ??? how did the r turn r3  ??

astarmathsandphysics:
Cut off the bit at the bottom then from the centre of the hemisphere to the edge and the bottom =r so V=pi*r2h=pi*r3 and take away voume of hemisphere=2/3*pi*r3

Subtract to give Vm=1/3*pi*r3

sweetsh:
The forum today caused me a headache!

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