1. Because when burning paper, the paper constantly releases heat, which is absorbed by water, and the specific heat of water is large, so it needs to absorb a lot of heat to raise the temperature, and the temperature of paper rises with water, so it can't be said that it won't burn, but the heat to be absorbed is not enough.
No, because the temperature of metal decreases, and water vapor will liquefy into small water droplets and attach to it when it is cold, only when the temperature of metal is the same as the outside temperature.
3。 I opened the book myself and forgot what it was.
Look at all the details I entered. Let's adopt mine, okay?