Yes. Gravity attracts every speck of mass in the universe to every other one,
even though in almost all cases, there's nothing but vacuum between them.
Nothing. Gravity exists in vacuum as well.
There IS gravity in a vacuum - there's no AIR.
Yes if there is no gravity
A feather falling in a vacuum is not considered as a projectile motion. Gravity, which is absent in a vacuum, is one of the components of projectile motion.
Not necessarily. A vacuum is merely any volume having a density lower than an arbitrary amount.
Nothing. Gravity exists in vacuum as well.
There IS gravity in a vacuum - there's no AIR.
No.
Yes if there is no gravity
Vacuum filtration is far faster.
No - gravity acts across the vacuum of space - this is how the moon affects our tides.
Gravity waves travel as small distortions in space and time.
A feather falling in a vacuum is not considered as a projectile motion. Gravity, which is absent in a vacuum, is one of the components of projectile motion.
Whether or not you float has nothing to do with vacuum. You float because you are too far away from the earth (or other massive objects) for their gravity to have any noticeable effect on you. It just so happens that this occurs in space where natural vacuum may be found.
Not necessarily. A vacuum is merely any volume having a density lower than an arbitrary amount.
This ratio is called the specific gravity.
Because space doesn't have an atmosphere. I disagree, it is due to the fact that most of Space is a vacuum and gravity only works between masses ad a vacuum is not a mass so depending on how far you are from mass, there is either very little gravity or none.