yes
When yeast is in cold water, it goes dormant. If the water is too cold, though, it will kill the yeast.
I think the hot water bubble flies fastest than cold water bubble.
Warm water is best for yeast because yeast is a living organism that likes to live in similar temperatures to humans. Put yeast in hot water and it dies, put it in cold water and it will not do its job properly (will be too cold to reproduce fast etc). Put it in water that is just right and it will thrive
warm water - yeast needs warm water to become active. suger is the yeast's food .it gives the yeast the energy it needs to grow. cold water - the cold water kills the yeast (kind of) normal room temperature - the yeast just becomes in active and doesn't react
it turns weird
no, both cold and hot water can affect soap bubbles
no
Yeast needs an appropriate temperature, water, and sugar to be active. If it does not have those three things, it will be inactive.
Safety. It will bubble vigorously if charcoal is added when hot.
Heat energy is transferred from the hot water to the cold.
It sounds like your yeast is not working. How old was it? Did you put it in cold water?
Might be old or the water is too cold to activate it or too hot and killed it.