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Inventions Session 1 Multiple Questions and Answers.
| 26. | In which decade was the first solid state integrated circuit demonstrated? | ||
| A. | 1950s | ||
| B. | 1960s | ||
| C. | 1970s | ||
| D. | 1980s | ||
| 27. | What J. B. Dunlop invented? | ||
| A. | Pneumatic rubber tire | ||
| B. | Automobile wheel rim | ||
| C. | Rubber boot | ||
| D. | Model airplanes | ||
| 28. | Which scientist discovered the radioactive element radium? | ||
| A. | Isaac Newton | ||
| B. | Albert Einstein | ||
| C. | Benjamin Franklin | ||
| D. | Marie Curie | ||
| 29. | When was barb wire patented? | ||
| A. | 1874 | ||
| B. | 1840 | ||
| C. | 1895 | ||
| D. | 1900 | ||
| 30. | What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? | ||
| A. | Charles Richter | ||
| B. | Hiram Walker | ||
| C. | Giuseppe Mercalli | ||
| D. | Joshua Rumble | ||
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