In uniform circular motion, total acceleration of an object in a circular path is equal to the radial acceleration. Due to the presence of tangential acceleration in non uniform circular motion, that does not hold true any more. To find the total acceleration of an object in non uniform circular, find the vector sum of the tangential acceleration and the radial acceleration.
Pyrite is a polymorph of marcasite, which means that it has the same chemistry, FeS 2, as marcasite; but a different structure and therefore different symmetry and crystal shapes. Pyrite is difficult to distinguish from marcasite when a lack of clear indicators exists.
It is not iron(IV) sulfide; the iron is in a +2 oxidation state, combined with an S 2 2- ion (the sulfur analog of the peroxide ion). Pyrite burns when heated to form sulfur dioxide and iron(III) oxide: The reaction is sometimes used in industry as a source of sulfur dioxide for the manufacture of sulfuric acid.he same pigment can be obtained from the reaction of iron(II) with ferricyanide: The product of the reaction is the blue color ingredient in many artist's pigments, printing inks, and dyes (including Berlin blue, Chinese blue, mineral blue, Paris blue, and Prussian blue).