Inventions - Section 1

Answer: Option A

Explanation:

Joseph F. Glidden was born in New York on Jan. 18, 1812. He invented barbed wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won, Gidden became known as the "Father of Barbed Wire".

Answer: Option A

Explanation:

Richter was born on an Ohio farm in 1900. He died in 1985.

Answer: Option D

Explanation:

Various authors have credited the invention of the thermometer to Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development. Galileo Galilei also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall, which is nowadays the principle of the Galileo thermometer (shown). Today such thermometers are calibrated to a temperature scale.

Answer: Option D

Explanation:

Thomas Jefferson (April 13, 1743 - July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).

Answer: Option B

Explanation:

An Italian American physicist Federico Faggin widely known for designing the first commercial microprocessor. He led the 4004 (MCS-4) project and the design group during the first five years of Intel’s microprocessor effort. Most importantly, Faggin created in 1968.

Answer: Option A

Explanation:

Leslie R. Groves, however, was the military head of the project and the overall supremo, while Robert Oppenheimer was the scientific director. The world's first atomic bomb was exploded in the New Mexico desert on July 16, 1945.

Answer: Option A

Explanation:

The first lawn mowers were not engine powered. Invented in 1830 by Edwin Budding of England, the mowers were turning blades on wooden sticks used to cut grass. Engine powered mowers were not invented until 1919 by an American Army colonel, who used the motor from a washing machine.

Answer: Option D

Explanation:

In 1904, John Ambrose Fleming invented the first practical electron tube called the 'Fleming Valve', which is a diode rectifier. In 1906, Lee de Forest invented the audion later called the triode, which provided signal amplification.

Answer: Option C

Explanation:

George Gamow. Gamow, who died in 1968, was a physicist, who published "Thirty Years that Shook Physics".

Answer: Option C

Explanation:

The board was invented by Isaac and William Fuld. The word 'Ouija' comes from the French and German words for 'yes', 'oui' and 'ja'.