A. 1743 B. 1739 C. 1760 D. 1785 Explanation: The first elevator was built in the palace of King Louis…
A. X ray machine B. Betatron C. Cyclotron D. Nuclear reactor Explanation: Invented in 1942.
A. 1940s B. 1950s C. 1960s D. 1980s Explanation: On December 23, 1947, William Shockley, Walter Brattain and John Bardeen,…
A. Alfred B. Nobel B. Thomas Alva Edison C. Benjamin Franklin D. Rudolf Diesel
A. Gasoline powered automobile B. Streetcar C. Glider D. Steam turbine Explanation: Invented in 1885
A. 1940s B. 1950s C. 1970s D. 1960s Explanation: The scanner reads the bar code label on something at a…
A. 1920s B. 1900s C. 1870s D. 1890s Explanation: The first Frisbee were pie tins from the Frisbee Pie Company…
A. Wright Brothers B. Lidenbergh Brothers C. South Brothers D. West Brothers Explanation: Wilbur and Orville Wright made the first…
A. 1950s B. 1960s C. 1970s D. 1980s Explanation: SPICE (Simulation Program with Integrated Circuit Emphasis) was introduced in May…