The starting temperature will certainly affect the time it takes for water to freeze. By definition, the temperature will be the same for both the water that started warm as it is for the water that started cool when they both freeze. The time difference comes from going from warm (~85 degrees) to freezing (32 degrees) and from cool (~50 degrees) to freezing (32 degrees).
Cold water freezes faster because hot water has to cool down to the freezing temperature before it can freeze.
Yes, usually.
Mpemba effect ,water evaporates faster so it has less water so it freezes faster
rar i am not going to anser this
If you mean, compared with cold water, it doesn't. Hot water has to cool down first, before it freezes.
umm... well im not sure but i think its because of air and all that stuff
No, adding salt to water does not make it cool down faster. In fact, adding salt to water lowers its freezing point, which means it will take longer to freeze but will not cool down faster.
Apple juice is denser than water and has more solids in it than water. Solids are easier to cool than liquids and thicker liquids are easier to cool than thinner liquids. Therefore, apple juice freezes faster
Yes ,the higher the temperature gradient between the hot water and room temperature, the faster it cools. However, that does not mean that hot water will freeze faster than cold water (a common urban legend). If you have water at 50°C in a room at 20°C, it will cool from 50° to 40° faster than it will cool from 40° to 30°.
because it depens in the temperature of the ?
Absolutely. Water must achieve a temperature below 32°F before it can freeze. The closer the water is to room temperature, the quicker it will freeze. There is a phenomenon in which warm water freezes and cold water not: In some regions(e.g. Siberia) it is possoble to pour boiling hot water to the ground and it will freeze even before it hits the bottom. This is possible as hot water's molecules are moving more heavily than those of cold water. Therefore the surface of the water is bigger and warmth can leave the molecules faster. I remember a report of a experiment at one of the university's found hot water froze faster by a inute.
No, boiling water cannot freeze in the air. Boiling water needs to cool down before it can freeze, and the air is not cold enough to freeze boiling water instantly.