The chemicals in the pen ink could be potentially dangerous for you gerbil. Don't do it!
it would explode.
There is no reason to put a gerbil in a closet for twenty hours. The poor animal would be half starved.
fill the sink with water but not to much water as it will drown the poor thing then put the gerbil in the sink get a cup and put a little bit of water in it and pour the water over it dry it with towel and keep it warm when not fully dried
it will goes under the water.
You put her in with a male gerbil.
Why would it kill them? Gerbils need water. As long as the bowl isn't so big and so deep they would fall in and drown it would not kill them.
If you put something less dense than water into water, it will float. If you put something with the same density as water into water, it will stay suspended at that level. If you put something more dense than water into water, it will sink to the bottom.
it will get hot
it melts
Yes, but with NO water in - just to play in an empty tub.
It would die.