1. What was the first capital of the United States?

2. What are the three primary chemical components of gunpowder?

3. Who was the Dutch spectacle maker who applied for the first telescope patent?

4. What was the name of the first successful powered aircraft flown by the Wright brothers?

5. At which research organization did Tim Berners-Lee invent the World Wide Web?

6. Who was the British engineer who successfully tested the first turbojet engine in 1937?

7. Which of these devices was made possible primarily by the high energy density of the Lithium-Ion battery?

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

9. How does a diesel engine ignite its fuel without using a spark plug?

10. Which element is added to steel to make it 'stainless' and resistant to rust?

11. What was the name of the first commercially successful electric washing machine?

12. What crucial third feature did Garrett Morgan add to the traffic signal to make it safer?

13. Which biological organ does a dialysis machine mimic?

14. What type of propulsion system do Jet Skis use instead of a traditional external propeller?

15. Which feature of the original iPhone set it apart from most 'smart' phones of the time?

16. What made Gaston Planté's 1859 battery different from earlier versions like the Voltaic Pile?

17. What was the name of Robert Fulton’s successful steamboat launched in 1807?

18. What large rotating device on the side or back of a steamboat propels it forward?

19. What was a major danger of 19th-century steamboat travel?

20. What eventually reduced the dominance of steamboats?