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The water is boiling in radiator because it's temperature(radiator's) reaches the boiling point of water when the engine works for a long time.
Cholera organisms can live and remain infectious almost forever as long as they are in water. Boiling the water is the only sure way to kill them.
Well the idea behind this concept is heat kills bacteria, to a point. Boiling water doesn't necessarily prevent diseases in as much as it kills bacteria on the item being boiled. So if there are a number of people in the house with the flu, and there is a healthy baby in the same house, boiling a baby bottle won't prevent spreading the disease, it will only "sterilize" the bottle.
It usually takes a minimum of 10 minutes to sterilize items places in boiling water.
Short answer: Pressure. Long answer: Pressure changes the boiling point of a substance. The higher the pressure, the higher the boiling point, and vice versa. For example, boiling water in the mountains is easier than boiling water at sea level. Note that boiling water is not necessarily hot. You can boil water at room temperature if the pressure is low enough (For example, using a vacuum generator)
By the time water hits its boiling point the water is safe.
With the microwaved water, it pretty much depends on the microwave Owens temperature. Though boiling water is 100 degrees Celsius. (I would like to add): The water's temperature depends how long the microwave runs and the power of the microwave. However, if the water is boiling in the microwave, it is the EXACT same temperature as water boiling on the stove. The microwave is just another method of boiling the water.
Silkworm cocoons are placed in boiling water to make the one long continuous thread separate from it.
If you mean 212 oF then this is boiling point of water. If you mean 212 oC then the water has long evaporated into a gas.
I think you're talking about minerals. Sometimes little bits of germs are in it, because it was left from cleaning the water. Boiling it will kill the tiny bits as long as you don't add ice in it, making the particles reappear.
How long it takes water to boil depends on how much heat is being used. Water boils at 100 degrees C
If you boil it, the water will evaporate. If you leave it boiling long enough, you should only have salt left.