Measurement - Solution of Problem 2.2 , 2.3 and 2.4

Problem No. 2.02 The Mass of an electron is 9.15 X 10E21 Kg. Convert it in gram, milligram and microgram. Problem No. 2.03 The radius of a Hydrogen Atomis 0.53 X 10E10 m. Convert it in cm, mm and nm. Problem No. 2.04 The Time taken by an electron to complete one revolution about its Nucleus is 0.5 X 10E18 seconds. Convert it into minute, hours and micro-seconds.