Yes. Water of any starting temperature must be cooled to 0 oC in order to freeze.
It has been proven that hot water freezes faster than cold water.
yes
Yes it does. Cold water freeze slower than normal or hot water.
Hot and cold water and a freezer and a timer or stopwatch
No. It takes longer to freeze because cold water is closer to it's freezing point.
The fact that hot water may freeze faster than cold is often called the Mpemba effect
Water will freeze faster than salt water.
no salt water does not freeze faster than sugar.
no because the cold water speeds up the process by starting it
Cold water will freeze faster. Because the freezing point of water is 0oC, water that is closer to that point will freeze faster then hot water. This is because it will require less time to lower the temperature to the freezing point.
I suppose that pure water freeze faster.
The process of water freezing into ice involves the temperature of water being lowered to 32 degrees Celsius. Hot water will take longer to freeze because the difference between the temperature of hot water and 32 degrees is greater than the temperature of cold water and 32 degrees.