A truck was carrying a substance in a tank. the molecules of that substance were moving away from each other. the truck parked overnight in a place where energy transferred out of the substance. in the morning the substance was a gas .how were the molecules moving in the morning? explain why the molecules are moving that way after the energy was transferred out of them. Anyone please help me with this i don’t get it and it’s due

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

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