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At what degrees celsius and Fahrenheit does water freeze?
32 Degrees Fahrenheit 0 Degrees Celsius
How many gallons of 80 percent antifreeze solution must be mixed with 100 gallons of 10 percent antifreeze to get a mixture that is 70 percent antifreeze?
600 gallons. To solve this think about the amount of antifreeze in the solution. When 10% antifreeze is added to x times as much 80% antifreeze, the resultant percentage antifreeze will be: (10 + 80x)/(1 + x) So to obtain a 70% solution, x will need to solve: (10 + 80x)/(1 + x) = 70 ⇒ 10 + 80x = 70 + 70x ⇒ 10x = 60 ⇒ x = 6 So to 100 gallons of 10% antifreeze solution, 100 x 6 = 600 gallons of 80% antifreeze solution will be needed to make it a 70% solution. Consider adding 100 gallons of 10% antifreeze and 100 gallons of 80% antifreeze together and then taking half the resultant solution, that is so that you have 100 gallons of the mixture; the amount of antifreeze in this 100 gallons is (10 gallons + 80 gallons) ÷ 2 = 45 gallons, that is a 45% mixture. Now consider adding 100 gallons of 10% antifreeze and 200 gallons of 80% antifreeze together and then taking a third of the resultant solution, that is so that you have 100 gallons of the mixture; the amount of antifreeze in this 100 gallons is (10 gallons + 2 x 80 gallons) ÷ 3 = 562/3 gallons, that is a 562/3% mixture. If x times as much of the 80% antifreeze is added to the If 1 gallon of 10% antifreeze was added together with 80% antifreeze, the resultant mixture will still be (10+90)/2 = 45%. So if x times as much of the 80% Consider the amount of antifreeze in the solution. When two solutions of the same volume is added, the amount of antifreeze in the same volume is half the new amount. Consider the ratio of anti-freeze to water in each of the solutions in fraction form of antifreeze/water: 10% is 10/90 70% is 70/30 80% is 80/20 When two ratios are added together, the amount of antifreeze in the solution is added together and the amount of water is added together to give some odd fraction maths: 10% + 80% = (10+80)/(90+20) = 90/110 =
What temperature is freezing-?
It depends on what exactly you want to freeze. Every substance has a different freezing temperature. The freezing temperature of pure distilled water is 32 degrees Fahrenheit or 0 degrees Celsius.
How long does it take for cold water to freeze?
It all depends on the temperature of the air that it is in contact with, the air has to be at least 0 degrees Celsius so you cannot work out how quickly it will freeze without knowing the air temperature ;)
What happens to your breath when it is -90 degress Fahrenheit outside?
The water droplets in your breath would simply freeze more quickly than when it is a less extreme temperature (e.g. 10 degrees Fahrenheit). Your breath may appear to "sink" more quickly than in more normal temperatures, but little else would change.However, the likelihood of -90 degrees Fahrenheit in populated areas, those outside of Antarctica, the extreme Arctic, and the peaks of tall mountains, is small-even in those areas. The coldest temperature ever recorded was -129 degrees Fahrenheit at Vostok Station, Antarctica on July 21st, 1983; so while -90 degrees is certainly possible, it is incredibly unlikely outside of the poles and the tops of the tallest mountains in the world.
