OLD is Gold solutions, +2 science

Unit 1 : Mechanics  1. Physical Quantities  Dimensional formula for class 11 Short Answer Questions          [2] 1.[2075 Set A Q.No. 1a] Differentiate between accuracy and precession of measurement.     Ans: Accurate measurement means capable of providing a correct reading of measurement. In physical science, it means correct. A measurement is accurate if it correctly reflects the size of the things being measured.             Precise measurement means exact, as in performance, execution, or amount. In physical science it means repeatable, reliable, getting the same measurement each time. 2.[ 2075 Set B Q.No. 1g] In one of the printed documents the unit of universal gravitational constant is given as  NmKg-2. Check its correctness from dimensional analysis.   Ans: The unit of universal gravitational constant on printed document is NmKg-2. Here N is the unit of force, m is the un...