physics mcq

Chapter 1: MEASUREMENT The SI standard of time is based on:A. the daily rotation of the earthB. the frequency of light emitted by Kr86C. the yearly revolution of the earth about the sunD. a precision pendulum clockE. none of theseAns: E A nanosecond is:A. 109 sB. 10−9 sC. 10−10 sD. 10−10 sE. 10−12Ans: B The … Read more