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- Question
When were bar code scanners invented?
Options- A. 1940s
- B. 1950s
- C. 1970s
- D. 1960s
- Correct Answer
- 1970s
ExplanationThe scanner reads the bar code label on something at a supermarket, and translates it into a number which the computer reads. - 1. In which decade was the AEEE (now the IEEE) founded?
Options- A. 1850s
- B. 1880s
- C. 1930s
- D. 1950s Discuss
- 2. When were blue jeans invented?
Options- A. 1900s
- B. 1860s
- C. 1870s
- D. 1850s Discuss
- 3. What invention is credited to the Russian born American inventor Vladimir Kosma Zworykin?
Options- A. Telegraph
- B. Radio
- C. Television
- D. Dishwasher Discuss
- 4. Who invented Bicycle?
Options- A. Leo H Baekeland
- B. Karl Benz
- C. Evangelista Torricelli
- D. Kirkpatrick Macmillan Discuss
- 5. Who invented the Seed Drill?
Options- A. Jethro Tull
- B. Arlo Guthrie
- C. Woodie Guthrie
- D. Thomas Hines Discuss
- 6. What did cardiologist Dr. Paul Zoll invent in Massachusetts in 1952?
Options- A. EKG
- B. Artificial heart valve
- C. Artificial heart
- D. Pacemaker Discuss
- 7. Which scientist discovered the radioactive element radium?
Options- A. Isaac Newton
- B. Albert Einstein
- C. Benjamin Franklin
- D. Marie Curie Discuss
- 8. What Galileo invented?
Options- A. Barometer
- B. Pendulum clock
- C. Microscope
- D. Thermometer Discuss
- 9. What item, originally called the 'Whirlwind', was invented by Ives McGaffey in 1869?
Options- A. Blender
- B. Electric mixer
- C. Washing machine
- D. Vacuum cleaner Discuss
- 10. Who invented Bakelite?
Options- A. Charles Goodyear
- B. Leo Hendrik Baekeland
- C. Roy Plunkett
- D. Henry Ford Discuss
Inventions problems
Search Results
Correct Answer: 1880s
Explanation:
The IEEE (Institute of Electrical and Electronics Engineers) was formed in 1963 by the merger of the Institute of Radio Engineers (IRE, founded 1912) and the American Institute of Electrical Engineers (AIEE, founded 1884).
Correct Answer: 1850s
Explanation:
The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.
Correct Answer: Television
Explanation:
Zworykin invented both the tube (iconoscope) for transmission and the receiver (kinescope) in 1923 and 1924, respectively.
Correct Answer: Kirkpatrick Macmillan
Correct Answer: Jethro Tull
Explanation:
It was invented around the early 1700's.
Correct Answer: Pacemaker
Explanation:
The pacemaker is an electrical device that regulates the heartbeat.
Correct Answer: Marie Curie
Correct Answer: Thermometer
Explanation:
Various authors have credited the invention of the thermometer to Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development.
Galileo Galilei also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall, which is nowadays the principle of the Galileo thermometer (shown). Today such thermometers are calibrated to a temperature scale.
Correct Answer: Vacuum cleaner
Correct Answer: Leo Hendrik Baekeland
Explanation:
Leo Hendrik Baekeland invented the first plastic called Bakelite.
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