Inventions-General Knowledge questions and answers

Marc Andreessen, the leader of the team that developed Mosaic, left NCSA and, with James H. Clark, one of the founders of Silicon Graphics, Inc. (SGI), and four other former students and staff of the University of Illinois, started Mosaic Communications Corporation.

With the construction project stalled, and freed from the nuts and bolts of detailed construction, Babbage conceived, in 1834, a more ambitious machine, later called Analytical Engine, a general-purpose programmable computing engine.

Wallace Hume Carothers (/kəˈrʌðərz/; April 27, 1896 – April 29, 1937) was an American chemist, inventor, and the leader of organic chemistry at DuPont, who was credited with the invention of nylon.

Nicolaus Copernicus was an astronomer who proposed a heliocentric system, that the planets orbit around the Sun.

He is a Polish astronomer who put forth the theory that the sun is at the centre of the Universe.

Copernicus finished the first manuscript of his book, "De Revolutionibus Orbium Coelestium" ("On the Revolutions of the Heavenly Spheres") in 1532.

In it, Copernicus established that the planets orbited the sun rather than the Earth.

He discovered the solar system model and the planets' path.

Sir Frederick Banting, a physician and scientist, was the co-discoverer of insulin, a hormone of critical importance in regulating blood sugar levels. When insulin action is deficient, one develops diabetes mellitus.

The most commonly used ophthalmic steroid is prednisolone acetate 1%. Dexamethasone 0.1% ophthalmic solution sometimes is used as a generic alternative.

Robert Peary (1856-1920) was an American explorer and US Navy officer who made several expeditions to the Arctic in the late 19th and early 20th centuries.

He is best known for claiming to have reached the geographic North Pole with his expedition on April 6, 1909.

He made his first trip to the interior of Greenland in 1886. In 1891, Henson, a young African American sailor, joined him on his second arctic expedition.

Their team made an extended dogsled journey to the northeast of Greenland and explored what became known as “Peary Land.”

In 1893, the explorers began working toward the North Pole, and in 1906, during their second attempt, they nearly reached latitude 88 degrees north–only 150 miles from their objective.

In 1908, the pair travelled to Ellesmere Island by ship and in 1909 raced across hundreds of miles of ice to reach what they calculated as latitude 90 degrees north on April 6, 1909.

There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.

The purity of milk is measured by a lactometer. Lactometer works on Archimedes’ principle. It measures the relative density of milk with respect to water. The sourness of the milk is due to the presence of lactic acid.

Human beings feel tired due to the accumulation of lactic acid in the muscles.

A lightning rod or lightning conductor invented by Benjamin Franklin in 1752 in Pennsylvania in 1749, is a metal rod mounted on a structure and intended to protect the structure from a lightning strike.

If lightning hits the structure, it will preferentially strike the rod and be conducted to ground through a wire, instead of passing through the structure, where it could start a fire or cause electrocution. Lightning rods are also called finials, air terminals or strike termination devices.