Cold water is weigh from hot water; as the molecules tend to free (or expand) by getting heat, which causes increase in specific volume (i.e. decrease in density). As a result, hot water becomes lighter, compared to cold.
It depends on how hot/cold your water is, and how hot/cold room temperature is.
Yes, hot water boils faster than cold water because the molecules in hot water have more energy and are already closer to the boiling point. This means it takes less time and energy to raise the temperature of hot water to the boiling point compared to cold water.
No, cold water is not hot. Cold water is at a lower temperature than hot water.
No, cold water weighs more (for a given volume) than hot water. This is why there is a thermocline in bodies of water. But when water freezes, the solid form weighs even less (for a given volume), this is why ice floats.
Water can be either hot or cold depending on the temperature. Water at room temperature is considered neither hot nor cold.
HOT rises COLD sinks
Hot water is less denser than cold water and has a greater temperature.
Hot water is less denser than cold water and has a greater temperature.
Cold water
If you let hot water cool down, it will become cold water.
Tepid water is between hot and cold.
No, cold water is piped into the hot water tank and is heated by electricity or gas, it then flows out to the hot water taps.