Question

How is it possible to balance an egg on a nail in the center of equator.
Explain​

Answer 1

Answer:

The theory goes that you can balance an egg on a nail on the equator, but not anywhere else. ... There's no reason why balancing an egg at the equator should be any easier or harder than anywhere else. But there's no doubt it's hard.

EXPLAINATION

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Answer 2

Answer:

The same way you would balance an egg on a nail head elsewhere. You need to ensure that the nailhead is level, that the egg's centre of gravity is over the nailhead (and ideally, over it's centre) and that the eggs surface at the point of contact is perpendicular to the line from centre-of-gravity to contact point.