Inventions and Discoveries

26. Who invented the first successful helicopter?
a) Igor Sikorsky
b) Leonardo da Vinci
c) Wilbur Wright
d) Orville Wright

27.Who discovered the law of conservation of energy?
a) Albert Einstein
b) Isaac Newton
c) James Clerk Maxwell
d) Robert Boyle

28. Who invented the first microscope?
a) Antonie van Leeuwenhoek
b) Robert Hooke
c) Galileo Galilei
d) Johannes Kepler

29. Who discovered the law of thermodynamics?
a) Sadi Carnot
b) James Joule
c) Lord Kelvin
d) Rudolf Clausius

30. Who invented the first digital computer?
a) Charles Babbage
b) Alan Turing
c) John von Neumann
d) Ada Lovelace