@@alexkoenig9012 indeed!👍

😂 Basically you can say this. Stand on ice with no friction and push against a friend. You will both go backwards. You didn't need to "push off anything " except eachother. This is how a rocket works, except instead of pushing against a friend the rocket pushes off the mass of the gas being ejected. 👍

Basically what you said is perfect 👍

@@master.arts.by.mohit. yep!

@JohnSaysHi that is the plan! Just got a new mic👍 Glad you enjoyed it!

It's not because of air pressure. It would still flow out if it was in a vacuum chamber.

​@@nothatsmypenpressure difference then

@@timothyhaines556 a bit of a correction here, weight is DUE to the pull of gravity and proportional to the amount of mass of an object, what we typically feel is the normal force from whatever object we're in contact with pushing back against the pull of gravity. The density doesn't really matter, a 1kg object could be made of feathers or a black hole, it would still feel the same pull from gravity.

@ericbreitbach1739 . I'm not sure we have a lot of firsthand experiments with blackholes, though. We do extrapolate that a teaspoon of neutron star would weigh more than whatever, let's say 200 elephants, or what have you. With a blackhole though, if we start with a massive star, and then it becomes a blackhole, we can notice 3 things; it may stay roughly the same in total matter, shrink dramatically in volume, but increase dramatically in density. If gravity was directly proportional to density, then that's going to explain why I can don't float, nor has any spelunker or coal miner, in any cave, ever.

@@timothyhaines556 A recently formed black hole and the star it was made from will have roughly the same gravitational pull, because they will have roughly the same mass. The pull from gravity in classical physics depends not only on the mass of both objects but also on the distance between both objects. More accurately (as accurate as classical physics can get) each point of object A with an infinitesimal mass mA gets attracted to all points of object B, each with infinitesimal mass mB. In practice this just means that when you go inside of a planet, gravity doesn't increase as you'd expect, since even though you're getting closer to the center, there's less mass below you and more mass above you, cancelling each other out as you get closer to the center. When it comes to black holes, no matter how close you get, the mass will always be below you, and so gravity increases as you get closer. This doesn't exactly mean gravity depends on density, but you can make the argument that it does... In certain cases...

@ThunderPanzer . Fair, but, the premise is that matter disrupts spacetime. A building is matter, yet we do not float within it. My belief, with yet to be discovered quantum gravity, is that gravity must start with quantum states. If you don't know small state gravity, then you don't know large body, spacetime deforming gravity. If you don't know small, quantum gravity, then there's zero chance we know gravity at all.

Gravity is just another word to describe magnetism/electromagnetism..