If I put warm water to take out the frost on my windshield, will it brake the glass?

Question:
My brother told me that it would but i want to know why. Thanks

Answers:

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If you dump how water on cold glass it will cause it to break, why heat expands he class to fast therefore it will break. If you want to test this take a class and put it in the freezer. Wait one hour and put on a sweater and safety glasses and then drop the class into a pot of boiling water CRACKKKKKK

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He is right don't to it. But a can of auto-glass defrost at a local auto store. Then you can also put a good anti-freeze windshield washer fliud in your car and use it to help you to defrost your windows as well.

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Hope this helps.

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That depends on how warm the water is.

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If it's boiling hot, I would expect to do some damage. If it's at room temperature, I wouldn't worry.

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ya it wouldnt be a good idea.when you put the warm with the cold it expands the glass. they have things for that in the automotive section at the store that would be safer.

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If you take boiling water and dump it on cold glass, yes it can break the glass. If you take warm water ( not really hot) and pour it evenly across the windshield, it shouldn't , provided you don't have any cracks or chips in your windshield.

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physics.....your heating the glass up causing it to expand faster than what it can physically withstand causing it to shatter, or crack at least. y dont u try it and tell me the results.

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If the water is too warm, the suddenly heated section of glass will expand while the rest of the cold windshield stays in one place, causing it to crack.

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This does happen, so I don't recommend using warm water to defrost your windshield. Buy a scraper.

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By the way, the reverse can happen if you use ice cold water to wash your car if the temp is over 100 deg F.

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Yes because the glass, which is despite being hard actually brittle because of its molecular make-up, is freezing and the water is hot. Basic physics really. A cold object made of a brittle substance when rapidly heated will shatter because the materials molecules don't have the time to expand properly. Using cold water will work just fine. Plus, don't turn your car's window defroster on hot until after the car has been warmed up using the heater first.

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youre best bet is to scrape it, if you cant scrape just be on the safe side, and use cold water. just as long as its warmer than the ice, which if its water it will be, it will thaw it out..

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it is veary possible. throw a sheet over the windshild at night to prevent the frost

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I wouldnt do it at all, but if you have a chip it will make it spread fast.

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My mother had a chip in her windshield and the defrost made it into a crack from one side to the other

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Don't use too hot water, that's not neccesary. If you poor very gentle (not all the water at once), there will be no problem at all.
You might even use normal cold water, but then you probably need more of it.
A scraper is better for the environment, and you loose more calories.
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