What technology was new to world war ii and the united states most in its war with japan?

Aircraft Carriers

Explanation:

Airplanes were nothing new to warfare by the time World War II came along. However, aircraft carriers WERE a new technology. It allowed the U.S. Navy to take its airplanes throughout the Pacific, weakening Japan severely. Remember that machine guns were actually first used in warfare at the end of the 1800s.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

eiffel tower

explanation: