Recent content by mick_1

It's not homework, I'm preparing for an examination. And I have serious problem solving this assignment. Pleas help me!

How to find centre of gravity for a hemisphere shell?? Can someone show me how to calculate centre of gravity for a hemisphere shell??

I don't understand this calculation with da = R^2\sin \theta d\theta d\phi ?? Do you have a picture to show this??

What do you mean by dV = R^2\sin \theta d\theta d\phi ??

moment of inertia for a ball shell Is ther anyone that can explain how to calculate moment of inertia for a ball shell?? I know that the answer is 2/3mR^2, but how can it be showen with integral??