2007-04-29 16:22:37 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
It doesn't.
"Cold water does not boil faster than hot water. The rate of heating of a liquid depends on the magnitude of the temperature difference between the liquid and its surroundings (the flame on the stove, for instance). As a result, cold water will be absorbing heat faster while it is still cold; once it gets up to the temperature of hot water, the heating rate slows down and from there it takes just as long to bring it to a boil as the water that was hot to begin with. Because it takes cold water some time to reach the temperature of hot water, cold water clearly takes longer to boil than hot water does. "
2007-04-29 16:29:40 · answer #1 · answered by Amanda T 1 · 0⤊ 0⤋
I've heard of this before. I believe it's a vector of energy issue that throws people off. It's not a straight line. Cold water will absorb the heat faster than hot water, but when it's the same temp as the hot water, it slows down to the same rate as the hot water is heating. The cold water appears to go faster than it seems it should, but that time makes it take longer than the hot water.
2007-04-29 16:31:27 · answer #2 · answered by Walter M 3 · 0⤊ 0⤋
The molecules in cold water are further apart so its takes it longer to heat up than hot water because in hot water the molecules are very close together. So it doesnt make sense that cold water boils faster. I have never heard that.
2007-04-29 16:30:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
No way .... you are wong.
I always put hot water into my jug for my morning coffee.
If cold water boiled faster I would get my man to put the jug on on his way to work.
Then I would get up half an hour later to find boiling water.
Have you ever heard of the phrase ..... "A watched pot never boils"?
2007-04-29 17:08:40 · answer #4 · answered by Chris 4 · 0⤊ 0⤋
No one has convinced me that this is so, because it is so illogical. If the purpose of boiling water is to raise the heat of the water to 100 degrees C. , or 212 Fahrenheit, and one pot of water starts out at 50C or 100F and the other starts out at 2C or 35F, it stands to reason that it will take longer to heat the pot of colder water than it will to heat the pot of hotter water.
2007-04-29 16:27:10 · answer #5 · answered by old lady 7 · 0⤊ 0⤋
An interesting question. I question its validity.
2007-04-29 16:26:02 · answer #6 · answered by cattbarf 7 · 0⤊ 0⤋
I didnt know that. Ill try it now.
2007-04-29 16:25:25 · answer #7 · answered by Cutemum 6 · 0⤊ 0⤋
it doesnt..thats impossible
2007-04-29 16:25:32 · answer #8 · answered by kennyk 4 · 1⤊ 0⤋
It doesn't.
2007-04-29 16:25:30 · answer #9 · answered by whitekt64 2 · 1⤊ 0⤋