1. Which mechanism is responsible for regulating the release of energy in a mechanical clock?

2. What material did Thomas Edison successfully use as a filament to create his long-lasting light bulb?

3. What substance is blown through molten iron in the Bessemer process to remove impurities?

4. What component, originally used in WWII radar systems, is the heart of a microwave oven?

5. Why was Bakelite considered the first 'true' plastic?

6. What physical principle allows light to stay inside a fiber optic cable without leaking out?

7. What were the first recorded words ever spoken into Edison's phonograph?

8. How many possible dots are in a standard Braille cell?

9. Which company coined the term 'Zipper' for Gideon Sundback's fastener?

10. What type of storage medium did the first digital camera use to save images?

11. Why is the steam turbine more efficient than the traditional steam engine used in locomotives?

12. What improvement made 'safety matches' safer than early friction matches?

13. The Haber-Bosch process allows for the mass production of which essential agricultural product?

14. What is the primary function of the small tail rotor on a standard helicopter?

15. What does an electron microscope use instead of light to illuminate a specimen?

16. What radioactive isotope is commonly used in ionization smoke detectors?

17. What was the name of the famous locomotive that won the Rainhill Trials in 1829?

18. Who is most famously credited with developing the first commercially successful steamboat in the United States?

19. What fuel source powered most early American steamboats?

20. What role did steamboats play in westward expansion?