Inventions and Discoveries in Physics.
| Invention | Year | Inventor | Country |
|---|---|---|---|
| Acetylene Gas | 1862 | Berthelot | France |
| Adding Machine | 1642 | Pascal | France |
| Adhesive Tape, (Scotch) | 1930 | Richard Drew | U.S.A |
| Aeroplane | 1903 | Orville & Wilbur Wright | U.S.A |
| Air Conditioning | 1902 | Carrier | U.S.A |
| Airplane, (Jet Engine) | 1939 | Ohain | Germany |
| Airship (Non - Rigid) | 1852 | Henri Giffard | France |
| Aerosol Spray | 1926 | Erik Rotheim | Norway |
| Artificial Heart | 1957 | Willem Kolff | Netherlands |
| Atomic Bomb | 1945 | J. Robert Oppenheimer | U.S.A |
| Atomic Numbers | 1913 | Moseley | Britain |
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