Tell us about yourself!
Heat indicates temperature...air and water absorb heat energy and expand thereby become thinner in density...as a result, colder water and air become the platform for the warmer air and water and the rise is simply due to density differences.
You are correct...read my previous reply
Then we have lug nuts that are put on with gorilla hair...LOL
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Some of the more crazy things I have found is "LOCTITE" usage on small screws and that is nearly impossible unless you heat the screws...sometimes I have found steel screws in aluminum housings...that is also a nightmare...especially in the automotive industry which is intentional I'm sure...heat is needed to melt the bonding.