Isaac Newton
Sir Isaac Newton FRS () (4 January 1643 – 31 March 1727 ) [ OS : 25 December 1642 – 20 March 1727 ] was an English physicist , mathematician , astronomer , natural philosopher , and alchemist . His treatise Philosophiæ Naturalis Principia Mathematica , published in 1687, des more
Francium
Francium (), formerly known as eka-caesium and actinium K , is a chemical element that has the symbol Fr and atomic number 87. It has the lowest known electronegativity of all known elements, and is the second rarest naturally occurring element (after as more
Speed of light :"Lightspeed" redirects here. For other uses, see Lightspeed (disambiguation) .
:For other uses of "speed of light", see speed of light (disambiguation)
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celerit more
Saffron
Saffron () is a spice derived from the flower of the saffron crocus (Crocus sativus), a species of crocus in the family Iridaceae . The flower has three stigma s, which are the distal ends of the plant's carpel s. Together with its style, the stalk connecting the stigmas to the rest of more
Bupropion
Bupropion (INN ; previously known as amfebutamone, Wellbutrin, Zyban) is an atypical antidepressant that acts as a norepinephrine and dopamine reuptake inhibitor , and nicotinic antagonist . Bupropion belongs to the chemical class of aminoketones and is similar in structure to the stim more