Why do balloons filled with air drop down?

Answer 1

The balloon may not look like there are no holes in it but it is covered in tiny holes small enough for air molecules to slip out one by through them. They will keep slipping out as long as the pressure in the balloon is higher than the pressure of the outside air.

Answer 2

One of the reasons why helium balloons go down so quickly is that the helium atom is VERY TINY - much smaller than oxygen molecules or nitrogen molecules. The helium atoms are tiny enough to leak right THROUGH the material of a latex balloon.

Silver "mylar" balloons hold in the helium much better, and stay inflated longer.

Answer 3

There is no reason why it should float. Basically, they are denser than the surrounding air, so they drop down. The material of the balloon is denser than air, and the air compressed inside the balloon is slightly denser than the air outside.

Answer 4

Because they have tiny leaks, the trapped gas inside is bound to leak out even if very slowly

Answer 5

Balloons filled with air drop down because the air inside the balloon is denser than the surrounding air. This makes the balloon heavier than the air around it, causing it to fall due to gravity.

Answer 6

weight of water

Answer 7

because of helium gas