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a closed system will not gain or lose mass
atoms often gain or lose electrons,which causes them to have a temporary negative or positive charge.
It doesn't lose or gain
They gain or lose electrons, while the atoms combine.
gain 2
Gain or lose
lose energy: gravity, otherwise see neuton's laws
Gain or lose
No, because they do not gain energy in falling.
No, objects that gain energy become hotter.
Lose
No. Atoms can gain and lose electrons but seldom gain or lose protons.
Heat will naturally flow from hotter objects to colder objects. If heat flows OUT OF your body, you will LOSE that heat energy (thermal energy).
a closed system will not gain or lose mass
atoms often gain or lose electrons,which causes them to have a temporary negative or positive charge.
It doesn't lose or gain
They gain or lose electrons, while the atoms combine.