Sunday, December 27, 2009

Why is an object lighter when it is hot?

the reason that it is not advisable to measure a sample in a hot test tube.Why is an object lighter when it is hot?
It's not lighter when it's hot. It may have a higher molecular speed (gas) or lower density (liquid), but it won't get lighter unless you lose some of it (evaporation, boiling). But those molecules just go somewhere else, they don't disappear.Why is an object lighter when it is hot?
it has lower density when it's hot.
If that was supposed to be funny please put it in Jokes and Riddle.


(plese don't mind me, bad mood)
Gas expands making low pressure causing lift. Liquid turns to vapor. Vapor expands making low pressure causing lift. Solids expands with no weight lost. The only lost would come for the moisture on the surface of the solid not from the solid. If the solid is porous the moisture inside the solid will evaporate make the solid to lose weight. Burning solids, gases, and liquids Will consume the material causing weight lose also. The three rules Expansion, evaporation, and consumption.
because the water evaporated.... and the condensation process takes place...
An object can't be lighter when it is hot. Mass of an object can't change.

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