23pani me daal de , gold one will float , other one wil not!
You have 2 balls. Both are identical in size and mass, but one is made of gold and is hollow,the other is not hollow and made from titanium. Find out which is which ball, and lets say both are covered with a black paint that is anti reflective, heat/electricity insulator. You can't use any measurement device, nor hitting, damaging or breaking the ball.
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7 Answers
23ok something else
size and mass is same ......so may be something to do with moment of inertia ?? [7]
1Treat with some acid.........with which both react....they shall show a change in colour
23ohhh ok ok, they hav same mass and occupy same volume , yeah so buoyant forces will also be same !!
btw we can use moment of inertia
one wich can be rotated wid ease will be the gold one ( I = 2/5 MR2 for gold but for titanium I = 2/3MR2)