Relative density / buoyancy.

Ask the Flat Earthers, not me.

they think propulsion in space is impossible lol

of the object in the medium.

(some do)

Well, you know what the more scientific term for Relative Density is, right?

haha specific gravity?

Also, of note, Buoyancy and Relative Density are two entirely different things.

Yep.

Relative Density doesn't even have units

Because it is a ratio

On its own, it isn't a force or anything.

And on its own it does nothing to hold down matter.

Buoyancy, is a bit more rational, but of course there are reasons why that flounders too.

But that's my two cents.

https://media.discordapp.net/attachments/538929818834698260/609856153077285074/FEDensityTower.gif

The bouyant force is scaled by the relativity density tho

It is.

relative

Because it is a ratio

You need to multiply it by something for it to be of any use

no relative wouldn't be a ration it'd be a difference I think

since at equal density bouyant force is zero

Relative Density is a ratio.

but that would be a ratio of 1

Relative Density is p[1] / p[2]

Usually p[1] / p[H20]

So, for example

860 kg/m^3 / 1,000 kg/m^3

= 0.86

Unitless ratio

But if it's the proportionality constant for bouyant force then it would multiply that by 1 and you'd get a nonzero bouyant force

At equal densities

Which we know isn't right

I don't see what you are trying to say, sorry.

? If Bouyant force is proportional to the relative density that means that (relative density)(some constants) = bouyant force

Buoyant Force, specifically, is relative to the weight of displaced fluid.

Relative density only would apply if it is water.

And then we are just looking at normal old density.

yes and weight of displaced fluid is not equal to weight of object for nonzero differences in density

(if the displaced fluid is also water)