71.

Who invented the first controllable flying AEROPLANE (AIRPLANE)?
A. Wright Brothers B. Lidenbergh Brothers
C. South Brothers D. West Brothers
Answer and Explanation
Answer:A
Explanation: Wilbur and Orville Wright made the first successful controlled powered flight at Kitty Hawk, North Carolina, in December 1903. The twelve second flight covered a distance of 120 feet and an altitude of just ten feet.
72.

What groovy item was invented by Englishman Edward Craven Walker in 1963?
A. Leisure suit B. Lava lamp
C. Eight-track tape deck D. Hot comb
Answer and Explanation
Answer:B
Explanation: Groovy, baby! Lava lamps, which were a fixture in every hip pad in the 1960s and 70s, featured a mixture of water and colored oil that created swirl patterns when heated by a light bulb.
73.

In which decade was the Internet first implemented?
A. 1940s B. 1950s
C. 1960s D. 1980s
Answer and Explanation
Answer:C
Explanation: The first message ever sent over what is now called the Internet took place at 10:30PM on October 29, 1969. Back then, the Department of Defense called it ARPAnet (Advanced Research Projects Agency network).
74.

What did cardiologist Dr. Paul Zoll invent in Massachusetts in 1952?
A. EKG B. Artificial heart valve
C. Artificial heart D. Pacemaker
Answer and Explanation
Answer:D
Explanation: The pacemaker is an electrical device that regulates the heartbeat.
75.

What Elmer A. Sperry invented?
A. Hydroplane B. Hydraulic turbine
C. Magnetic compass D. Gyrocompass
Answer and Explanation
Answer:D
Explanation: Invented in 1911.