Suppose a vacuum cleaner uses 100 joules of electrical energy. If 40 joules are used to pull air into the vacuum cleaner how efficient is the vacuum?

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

wegner's theory did not explain how the continents could move

explanation:

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.