If a body is in a vacuum and is filled with air, it will become heavier. If the body is filled with the same air at the same pressure as the outside of the body it will weigh the same. Confused yet? Well try this: In both cases (vacuum or atmosphere), the body will contain more mass with air, yet it will also have less density with more air.
If there is no air resistance - or if, due to the conditions, air resistance is insignificant - both will fall together. If there is air resistance, usually the lighter body will be more affected by air resistance (in relation to its weight), and therefore fall slower.
You feel lighter in water because water is heavier then air and nearly all of you is heavier then air, however when you get into the water parts of you want to float to the surface putting you under the impression that you are lighter.
Hole
Air / Gas
In a vacuum, all objects fall at the same rate regardless of their weight due to gravity. However, in real-world conditions with air resistance, lighter objects tend to fall slower than heavier objects because air resistance affects lighter objects more.
Objects are more buoyant in water than in air.
As with most substances, air expands when heated. When the same mass of a substance takes up more space, it is lighter. This allows hot air to rise above cold air, as we can discover if we lie on the floor and then stand on a chair near the ceiling - the difference is often very noticeable.
Yes, ozone is lighter than air.
Slide the lighter body out of the lighter case, by pulling on the wick cage. With the lighter body upside down squirt lighter fluid into the fiber packing in the lighter until saturated. Reassemble the lighter body into the lighter case. Let excess lighter fluid evaporate before using the lighter.
When heated air is lighter than the surrounding air, it will rise due to convection currents. This process is known as thermal expansion, where hot air becomes less dense and more buoyant, causing it to ascend. This can lead to the formation of clouds and eventually precipitation.
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
100% of hydrogen is lighter than air