If you roll two eggs on an incline plane , it si possible to tell which one is raw and which and which is boiled. How

How will you tell which part of a plant is the stem and which is the root?

You are given two samples. How do you distinguish which one is metal and which is non-metals?

Of the two eggs which have identical sizes, shapes and weights, one is raw and other is half boiled. The ratio between the moment of inertia of the raw to the half boiled egg about central axis is:

How do you know that rusting of iron is a change? If you are given two eggs, can you determine which one is boiled and which one is not ? Explain.

A disc and a hoop of the same and size roll down on inclined plane starting simultaneously. Then the one which reaches bottom first