question_answer

How will you distinguish between a hard boiled egg and a raw egg by spinning each on a table top?

Answer:

                To distinguish between a hard boiled egg and a raw egg, we spin each on a table top. The egg which spins at a slower rate shall be a raw egg. This is because in a raw egg, liquid matter inside tries to get away from the axis of rotation. Therefore, its moment of inertia I increases. As \[\tau =\text{ I}\alpha \]= constant, therefore, \[\alpha \] decreases i.e. raw egg will spin with smaller angular acceleration. The reverse is true for a hard boiled egg which will rotate more or less like a rigid body.