Quote (eMptyBox @ Aug 11 2022 10:40am)
If something is heavy for its size, it has a high density. If an object is light for its size it has a low density.
A pebble is heavy for its size, compared to a piece of popcorn which is light for itโs size. Imagine a big bowl of popcorn, compared to a big bowl of pebbles, which would feel heavier?
It is easy to estimate relative densities if you keep either the volume or the mass of two objects the same.
Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float. Density is a characteristic property of a substance and doesn't depend on the amount of substance.
Helium balloons float because helium is less dense than air. Helium atoms are very, very small and can escape through the balloon material, which causes the balloon to eventually sink.
What if there is matter but it's not in any medium? For example, helium atoms in space. Its not "denser" because there is no medium to compare density to. However it will still be drawn by any nearby object that has a hefty mass. And this is because gravity exists. I think this is Netflix's point.