What is the difference between a hydrogen filled balloon and an air filled balloon moving in air?

please answer. THe question is from the chapter PRESSURE.

A hydrogen filled balloon is lighter than air and rises. It can also burn very rapidly (Google Hindenburg) and it is safer to use helium even though it is not as buoyant.

To understand the difference between a hydrogen-filled balloon and an air-filled balloon moving in air, we need to consider the concept of pressure.

Pressure is the force exerted per unit area and can be mathematically expressed as P = F/A, where P represents pressure, F represents force, and A represents the area over which the force is applied.

Now, let's compare the two types of balloons:

1. Hydrogen-filled balloon:
Hydrogen gas is lighter than air, which means it has a lower density. When a hydrogen-filled balloon is released into the air, it will experience an upward force due to the difference in pressure between the outside and inside of the balloon. This is because the hydrogen inside the balloon is less dense than the surrounding air. As a result, the balloon will float upwards.

2. Air-filled balloon:
An air-filled balloon contains regular atmospheric air that we breathe. In this case, the density of the air inside the balloon is similar to the density of the air surrounding it. As a result, the pressure inside and outside the balloon is balanced, and no net force is exerted. Therefore, an air-filled balloon will not rise or fall but will stay relatively stable in the air.

In summary, the main difference between a hydrogen-filled balloon and an air-filled balloon is their density and, consequently, the resulting pressure difference. The hydrogen-filled balloon, being less dense than air, experiences a greater upward force and can float upwards, while the air-filled balloon remains relatively stable due to the similar densities of the air inside and outside the balloon.