Misc: What part of the body has a crown, a neck & a root?

Questions

drinking water after eating reduces the ---------- in your mouth by 61 percent?

drinking water after eating reduces the acid in your mouth by ---------- percent?

it takes about a half a gallon of water to cook---------- , and about a gallon to clean the pot?

it takes about a half a gallon of water to cook macaroni, and about a ---------- to clean the pot?

it's impossible to get water out of a ---------- tyre?