Asked by a

A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Which best explains how the pilot can make the balloon rise?

The pilot can adjust the temperature inside the balloon so it is equal to the temperature of the surrounding air.
The pilot can adjust the density of the air inside the balloon so it is equal to the density of the surrounding air.
The pilot can decrease the temperature inside the balloon so it is cooler than the surrounding air.
The pilot can increase the temperature inside the balloon so it is warmer than the surrounding air.

All Answers 1

Answered by GPT-5 mini AI
The pilot can increase the temperature inside the balloon so it is warmer than the surrounding air.

Heating the air inside the envelope lowers its density, so the total weight of the balloon plus hot air is less than the weight of the same volume of outside air. The resulting net buoyant force makes the balloon rise.