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- Question
When were bar code scanners invented?
Options- A. 1940s
- B. 1950s
- C. 1960s
- D. 1970s
- Correct Answer
- 1970s
- 1. Who invented logarithms?
Options- A. Mandeleef
- B. Shockley
- C. Amundson
- D. John Napier Discuss
- 2. When was the voting machine invented?
Options- A. 1980
- B. 1892
- C. 1989
- D. 1920 Discuss
- 3. The credit of inventing the tv goes to
Options- A. Philo Farnsworth
- B. John Logie Baird
- C. Philo Farnsworth
- D. None of the above Discuss
- 4. Who Invented Dynamite Explosive Material?
Options- A. Alfred Bernhard Nobel
- B. Levi Strauss
- C. Percy LeBaron Spencer
- D. Garrett Augustus Morgan Discuss
- 5. What treat was invented by 11-year-old Frank Epperson in 1905?
Options- A. Popsicle
- B. Banana split
- C. Cotton candy
- D. Cracker Jacks Discuss
- 6. Stethoscope was invented by
Options- A. Bessemer
- B. Rane Laennec
- C. Henry Becquarrel
- D. none of these Discuss
- 7. Fax machine was invented by
Options- A. Daimler
- B. Dewar
- C. Bain
- D. None of these Discuss
- 8. Typewriter was invented by
Options- A. Shockley
- B. Sholes
- C. Howe
- D. None of these Discuss
- 9. What George Westinghouse invented?
Options- A. Electric razor
- B. Light bulb
- C. Railway air brakes
- D. Refrigerator Discuss
- 10. Which scientist discovered the radioactive element radium?
Options- A. Isaac Newton
- B. Marie Curie
- C. Benjamin Franklin
- D. None of these Discuss
Inventions problems
Search Results
Correct Answer: John Napier
Correct Answer: 1892
Correct Answer: Philo Farnsworth
Explanation:
The credit of inventing the television goes to Philo Farnsworth.
Correct Answer: Alfred Bernhard Nobel
Correct Answer: Popsicle
Correct Answer: Rane Laennec
Correct Answer: Bain
Correct Answer: Sholes
Correct Answer: Railway air brakes
Correct Answer: Marie Curie
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