Because 0 oC is a lower value (cooler) than 20 oC - 25 oC (room temperature)
Assuming you mean for plants, think "rain temperature." Not hot, but room temperature to slightly cooler than that.
20 degrees cooler than the ambient (room)temperature.
Hot water would take longer to reach the freezing point than room temperature so hot water would freeze slower than water at room temperature
if something cold were to sit in room temperature it would get warmer than the room, slightly because it has more spread particles, if a hot object were to sit at room temperature it would get cooler than the room because it has more particles clustered together
No, but it can be the same temperature if the water is spinning fast to keep it from freezing
yeah cold water is denser than room temperature (warm) water.
La Nina is a change in temperature that produces cooler temperatures at the surface.
Depending upon the equal amount of salt that is present, more will dissolve in warm than room temperature than cold, and the rate of dissolution will be faster for warm water than room temperature than cold.
Hydrogen bonding is stronger in water than in ammonia.
Hydrogen bonding is stronger in water than in ammonia.
yes
That would significantly violate the second law of thermodynamics. For water to spontaneously freeze at room temperature, there would have to be something colder than the freezing point to absorb the energy coming out of the water. If the floor also became cooler, then it could not be absorbing energy. If you had ONLY the water and the floor, then this would also violate the 1st law - conservation of energy.