PROBLEM 11Q

Explain why hot-air balloons float above the ground.

Solution 11Q

Here, we are going to explain why hot-air balloons float above the ground.

Step 1:

Charles’s law states that pressure remaining constant, the volume(V) of a fixed mass of a gas is directly proportional to its absolute temperature(T).

Mathematically,

V T, (Pressure remaining constant)

This means that with the increase in temperature, the volume of the gas increases.