why does so much salt make an egg float?

Question

in a glass of water?

Answer 1

An object will float in a liquid as long as the object's density is less than the liquid's density.

Normally, the density of water is a little bit less than the density of an egg, so the egg sinks. By adding salt to the water, you increase the water's density. Add enough salt, and the water's density will become greater than the egg's density, and the egg will float.