Exercise Short Questions F Sc Part 1.pdf

Q # 1. Name several repetitive phenomenon occurring in nature which can serve as reasonable time standards. Ans. Any natural phenomenon that repeats itself after exactly same time interval can be used as time standard. The following natural phenomenon can be used as time standard.  The rotation of earth around the sun and about its own axis  The rotation of moon around earth  Atomic vibrations in solids Q # 2. Give the drawbacks to use the time period of a pendulum as a time standard. Ans. The drawbacks to use the time period of a pendulum as a time standard are  The value of ‘g’ changes at different places  The variation in the length of simple pendulum due to change in temperature in different seasons  Air resistance may affect the time period of simple pendulum