Pondérer means to balance, to equilibrate, to weight. This is not used in a physical sense, but for reasoning, concepts, declarations... The English verb 'to ponder' has the same Latin roots.

The temperature of water will eventually equilibrate with the surrounding temperature (of course it can also be affected by ice, or absorbing sunlight).

Heat conduction to a glass or to water will be higher than to air, so it may feel cooler than the surrounding air.

Assuming they've all been in there long enough to equilibrate, and assuming you haven't put them in some "special" location that's colder or warmer than average (the shelves in the door, for example, are often slightly warmer than the main shelves), they will all be the same temperature.

If the concentration of salt is higher OUTSIDE the cell, then water will move from the cell to the outside (osmosis) to equilibrate the concentration gradient that you have created!

Water will leave the cell, and the cell will shrink (due to the decrease in volume).