>>21221858>wtf is it saying?It's saying that flerfs are retards
Notice how there is no evidence the cart would move without the vacuum
In the absence of other forces, air moves from high pressure to lower pressure
A vacuum cleaner creates a lower pressure and the higher pressure air goes in
Vacuums don't suck, unlike this fucktard's mom who does it for $20
Furthermore, the implied retarded claim is "you can't have thrust without a vacuum" which is false
The ignited expanding gas inside the engine bell is the green P in the image
It is exerting a force in all directions
If the engine bell was closed nothing would happen - pressure equalizes
But when it is open, the gas escapes and a force imbalance is created
The force to the right is no longer countered by the left, so thrust is produced.
There is no outer gas required for this - the expanding gas is pushing against the right wall of the engine bell
https://www.youtube.com/watch?v=kAZMBAVRsCoAlso
https://youtu.be/_18RZDwnX4U?t=406And
https://youtu.be/yRfDwkHPVeg?t=294