if anything it would be reasonable to expect it to lose mass.
it will gain
a closed system will not gain or lose mass
The mass of a seed leaf changes depending on the water and internal processes. When some seed leaves lose water due to transportation, they lose mass. Other will start to sprout and produce their own food, which cause them to gain mass.
Eggs soaked in distilled water will gain mass and appear dramatically swollen. Eggs in dilute salt solutions will gain mass, and even those in very concentrated solutions might gain mass. Eggs buried in salt or other dry media should lose mass.
depends on the salt content of the potato and how concentrated the salt is. the more salt there is in the water than the potato- the more water will exit the potato which then loses mass.
No, because they do not gain energy in falling.
Water doesn't gain or lose mass when it freezes. Ice is less dense than water, this is why it floats. It may seem heavier, but there is no way that water can gain mass from just losing energy. Water does evaporate though even at very low temperatures, so if there is an apparent weight loss it is because of evaporation.
no
because it does
No. Comets LOSE mass with each pass by the Sun.
If we are talking the weight mass ratio, it will be the carrot.
It is slightly higher than water, 1140 kg/m3
yes you can, the main reason people lose muscle mass is because they do not work out. Increase your protein in take