Who invented fuel cells in 1839?

Correct Answer: Chloroform

Correct Answer: 1874

Explanation:

Joseph F. Glidden - Father of Barbed Wire.

• Glidden was born in New York in 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 received a patent for the modern invention in 1874 after he made his own modifications to previous versions.

Correct Answer: Michael Faraday

Explanation:

Michael Faraday invented Electric Generator in 1831.

 

• The operating principle of electromagnetic generators was discovered in the years of 1831?1832 by Michael Faraday.

 

• The principle later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

 

Correct Answer: Robert Brown

Explanation:

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

Correct Answer: Jonas E Salk

Correct Answer: Sandford Fleming

Explanation:

Sir Sandford Fleming, (January 7, 1827 ? July 22, 1915) was a Scottish Canadian engineer and inventor. Born and raised in Scotland, he emigrated to colonial Canada at the age of 18. He proposed worldwide standard time zones, designed Canada's first postage stamp.

Correct Answer: 1860s

Correct Answer: Play-Doh

Correct Answer: Computers

Correct Answer: Vacuum cleaner