most ppl are the saying that this is bcoz of friction but the answer is not friction as it is related to chemistry. Plz help out!
2007-01-31 14:38:07 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Because of the natural engine heat emitting through the hood gets carried along by the wind and hits the windshield. Just a guess.
2007-01-31 14:42:12 · answer #1 · answered by dgclip1981 2 · 0⤊ 0⤋
Ice, even if well below freezing point has a Vapour Pressure.
This means that molecules of vapour are escaping from the ice (sublimation).
When travelling, the windscreen is receiving a strong air flow which takes away these molecules at a much faster rate.
The Ice literally vaporises. (More a Physics thing).
2007-02-06 09:23:23 · answer #2 · answered by Norrie 7 · 1⤊ 0⤋
Ice will directly evaporate into a gas in a process called sublimation. If you have looked in your freezer at really old ice cubes, they will be smaller than the brand new ice cubes because much of the mass of the water has sublimed into a gas and escaped.
Of course, the heat generated within the car's engine and passenger compartment help that process.
2007-01-31 14:46:17 · answer #3 · answered by U235_PORTS 5 · 1⤊ 0⤋
Once you are in the car your breath and body heat increase the temperature in the car. Also the air coming through the engine as you drive is heated up as well thus heating the windshield.
2007-01-31 14:41:25 · answer #4 · answered by Anonymous · 1⤊ 0⤋
It has nothing to do with chemistry.
Even with the heater set to the "off" position, modern cars recirculate air. This air warms as you drive and eventually will heat the interior, albeit not to a toasty, comfortable level.
2007-01-31 14:54:47 · answer #5 · answered by I am, I said 3 · 1⤊ 0⤋