Physics, 13.10.2019 03:20, lberman2005p77lfi

As air is heated, the particles speed up and spread out (becoming less dense). hot air balloon pilots can change the balloon’s altitude (up or down) by turning a heater at the base of the balloon on or off. - if you were piloting a hot air balloon, do you think you would turn the heater on or off to make the balloon go up in the air? why do you think that?

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As air is heated, the particles speed up and spread out (becoming less dense). hot air balloon pilot...