because they their point of fusion are low or upon the point of fusion of the water.
If you have a kettle, the more water you put in, the longer it takes.
No, water that is covered does not boil faster. Covering the pot can actually trap heat and make the water boil slower.
Slower, the more water, the more time required to reach boiling temp.
Adding salt to boiling water will actually make the water boil slower. Salt increases the boiling point of water by raising its boiling point temperature. As a result, it will take longer for the water to reach the new, higher boiling point temperature and thus boil.
Heat it faster. I'm not sure which, but Salt either makes it boil/evaporate faster or slower...
== ==
A small amount of water will reach it's boiling point sooner than a large amount of water. It will not boil faster.
no it does not
yes
Covering water can make it boil faster because it traps the heat and prevents it from escaping, increasing the temperature of the water more quickly.
Yes, adding salt to water can slightly increase its boiling point, but it won't make the water boil significantly faster. The main purpose of adding salt to water when cooking is to enhance flavor, not to speed up the boiling process.
no