Vinyl, Phonograph Record LPs, EPs, are various names given to the Gramophone Record or simply Record. The Records come in three sizes measured as diameter - 7 inch (17.5cm), 10 inch (25cm), and 12 inches (30cm). The Records are also differentiated by the speed with which they rotate in a turntable. Again there are three speeds - 33 and 1/3, 45, and 78 revolutions per minute or RPM.
Records are called Vinyl as the basic material used for manufacture is Poly Vinyl Chloride or PVC. Early Records were made with PVC material that were 125 grams per square meter. If you take a meter by meter square of this material, it will weigh 125 grams. This was considered by many to be cheap. Because of the thinness, it was thought that the record will wear away quickly. Modern records are manufactured as 'Audiophile' which use slightly thicker PVC weighing either 190 or 220 grams per square meter. These records are slightly thicker and heavier. Otherwise there is no difference.
All these records will play on any turntable. The only issue differentiating between turntables is the speed at which the TT rotates. If a TT can handle the required speed it can play the Record.
A 12 inch Record that rotates at 33 and 1/3 RPM is usually called an LP. A 7 inch Record that rotates at 45 RPM is usually called an EP. 10 inch records are not very common.
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