Does a room temperature egg weigh more than a cold egg?

Question

Doing a science project on density of salt water. In a cup with a low ratio of salt water the cold egg will still float, however, the room temperature egg will drop to the bottom. Why? Does the room temp egg actually weigh more? I thought it would be the other way around. Need answer ASAP!

Answer 1

Did you only use one egg?

I can't comprehend how this works. I strongly suggest repeating this experiment several times - use six cold eggs, six room temperature eggs, and then see what happens.

Answer 2

Both eggs would have the same weight because nothing has been done to change the mass nor to change gravity. The reason the cold egg would sink is because the cold temperature has caused some contraction of the volume of the egg and so the density has become more than the density of the saline water.
Surface tension has nothing to do with it.
If you first cool the water, the sinking may not occur.
After the sunken egg has warmed up in the water it may rise to the top.

Answer 3

No. Weight is the force of gravity acting on a given mass of an object. Since the amount of mass in an egg is unchanged whether it is cold or warm, the weight doesn't change.
The results you have are due to the change in density of the egg. Since the warmer egg has expanded, the pores in thesurface of the egg have expanded, and disrupt the surface tension effect ofthe salt water, whereas the cold egg with smaller pores doesn't, and floats. It is an interesting effect and can win you a bet or two if you want to go to the trouble.

Answer 4

It is not clear whether the egg is dropping to the bottom immediately or after some time. And the cold egg: how cold it is? The details are not sufficient to explain.

Answer 5

Ommlletes tend to float !

Answer 6

mass is mass
It will be same mass regardsless of temperature