Have you ever wondered why the ball can float in the air? If you do not know, please refer to the article below.
People inject hydrogen gas into the balloon, but hydrogen is lighter than air, so the balloon can go up.
When we inflate a balloon with a gas called hydrogen , it will fly through the air. Simply because hydrogen is lighter than air. Thus, the ball can be levitated, just like an air bubble in water.
The hydrogen in the ball has a certain weight. But it has less specific gravity than air.
That means the hydrogen balloon is lighter when it’s filled with air, so it can fly.
Hydrogen gas forms from molecules that are smaller and lighter than all other molecules present in the air. So hydrogen is ideal for inflating balloons, but also dangerous: it’s an explosive gas. So people prefer to use helium, a slightly heavier gas that is not as dangerous.
Balloons can also be inflated with hot air, since hot air is lighter than cold air: thus the balloon is born.