Weight is the amount of force exerted on an object by gravity. If you don't have gravity, you need another answer for what this "downward force" is that makes objects weigh things.
Objects 300 miles up weight (almost) the same as they do on the ground. They don't automatically float, they have to be in orbit, which happens when centrifugal force cancels out gravity - the International Space Station goes around the world every 90 minutes, and if it just sat there instead it would fall just like if you dropped it off a building. The reason we don't put things into orbit nearer to the ground is that the atmosphere is in the way, not because things weigh more down here.
im saying stuff falls cause its heavier than air.... air is heavier than a helium balloon so it finds its way below the balloon.....they accelerate at speeds determined bye air resistance..or how fast the air can find its way around the hevier object......i think you only need a mythical force of gravity to stop the oceans flying off into space or the atmosphere from vacateing into the vacume of space
You are just repeating what YouTube videos tell you and miss the point. Why do 'denser' things fall TOWARDS the earth and not towards the 'firmament' or 'sideways'.
And, as he pointed out, you do not HAVE weight without gravity. There is no 'mass' to create density without the force that creates the weight. You simply cannot have a discussion about density and buoyancy without being forced to prove what CREATES density and buoyancy, since they do not exist without the downward force that we happen to call 'gravity' that explains WHY density and buoyancy act the way they do.
This is the FORMULA for buoyancy. It's mathematical calculation. Even DECLARING that buoyancy EXISTS is an admission that gravity exists. I'll let you guess what the 'g' stands for in the equation.
Fb = ρgV = ρghA
But if you actually want to understand it, instead of just repeat YouTube videos, here is the math.
http://www.softschools.com/formulas/physics/buoyancy_formula/28/
Nitpick: density exists in zero-g, it's just buoyancy that goes. A kilogram of iron is still denser than a kilogram of feathers.
(Oh, yeah, other counterpoint to the buoyancy "theory": can't explain why a kilogram of iron weighs the same as a kilogram of feathers)
huh explan?...they both weigh a kilo..
Kilograms are a unit of mass. Density is mass times volume. A kilogram of feathers is bigger than a kilogram of iron, which is why a 1kg bag of feathers is more buoyant than a 1kg lump of iron, which is why one floats on water while the other sinks, which is why if weight comes from buoyancy a kilogram of feathers has to be lighter than a kilogram of iron.
feathers are less dense yes...gold is denser than lead and has a lesser volume....they displace less water as volume decreases....so the upward force of boyancy decreases....feathers uncompressed will retain alot of air...compressed out the density will increase.....its not heavier.... and it only floats when the medium surounding it, until the air molecules that cling to it are no longer holding it up...and it will sink once the boyancy derived from the air....nothing to do with the density of the feathers...
.but ya i agree stuff falls at 9.8m/sec....i cant tell u why they dont fall faster or slower...but the law is universal and applies to everything...it doesnt mean its the mass of earth causing it...
"but ya i agree stuff falls at 9.8m/sec....i cant tell u why they dont fall faster or slower...but the law is universal and applies to everything...it doesnt mean its the mass of earth causing it..."
Yes, it does, because that is why things fall TOWARDS the earth and not AWAY from them. You did not answer why things fall towards the earth.. because you cannot. Science has answered this, but buoyancy, density, and even magnetism do not answer this question. Gravity does.
So, please answer the question that was asked. Since you have a claim that gravity does not exist, despite the fact that you cannot discuss buoyancy or density without gravity, so now you need to prove your claim. You are literally claiming that you have more knowledge than every scientist that believes in gravity, so you MUST have an alternate scientific explanation in order to have rejected the current scientific explanation.
OR.. you just reject it because believing in gravity does not support your rejection of a spherical earth, and to confirm your bias, gravity must be rejected. Which is a religion and not science.
So, SINCE you have rejected hundreds of years of science and have declared yourself more knowledgeable than all the scientists who have done work on gravity, and you CLAIM that density and buoyancy explain EVERYTHING we see that explains the phenomenon that we call gravity, then you MUST propose an alternate explanation, backed with observable, repeatable science, that your phenomenon answer the questions we now use gravity to answer, such as the reason things fall TOWARDS the earth and not away from it, and why it is more DIFFICULT to climb a hill, when, if gravity were density and buoyancy, it would be EASIER to climb a hill because you'd be coming out of all that density to a lighter area. In fact, those who climbed macchu piccu or Everest should find it positively BOUNCY without all of those layers of density pressing on them. But that is not the reality that we see, feel, or experience on earth.
OK cool cool.... so that formula is listed here......buoyant force =(density of liquid)(gravitational acceleration)(volume of liquid)
= (density)(gravitational acceleration)(height of liquid)(surface area of object)....
so to get the value in newtons i need to use a equation with gravity...yet newtons are derived from gravity....you could probly get a job with nasa.....stuff falls...air doesnt
Run as you may! You cannot escape...the Almighty Bunghole!
but i cant run bevis+!!...not without gravity
The streets will flow with the blood of the non-believers...
See @phyg 's answer. You still do not understand the difference between mass and weight, and you did not answer why objects do not fall up or sideways. What FORCE makes objects drop TOWARDS the earth.
Until you can answer that question, you are demonstrating that you have no idea what you are talking about.
The ISS isnt real mate....sorry....but ya it goes around the world every 90mins....and it actually is powered bye magical fairy dust, using gumgum forest magic to make's its way through the thermosphere and micrometoers........and The LEM took people to the moon too...and they used the tinfoil its made out of for a hat once they got there....after the golf, and buggy races.....lol
Everything I said about how gravity works in space was true and was known to physicists long before any space program, so that wouldn't be a relevant objection even if it was true.
And also obviously it's not true. I'm not impressed by what someone who doesn't understand the difference between weight, mass and density has to say about micrometeorites, you're just further illustrating how huge a chunk of reality you need to find excuses to deny if you want to believe in a flat Earth.