Which of the other gears is moving in the opposite direction from Gear 1

Heat is a form of

A substance that speeds up chemical reactions is a(n)

Debouch most nearly means:

Presidential appointments are an ongoing effort. Some of a president's appointments require Senate confirmation. These appointments are for positions throughout the federal government, for the Cabinet and sub cabinet, for members of regulatory commissions, for ambassadorships, for judgeships, and for members of numerous advisory boards.
Which of the following statements isn't true?