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Name two devices which were used for mea...

Name two devices which were used for measuring time in ancient times before pendulum clocks were made.

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LAKHMIR SINGH & MANJIT KAUR-MOTION AND TIME-EXERCISE
  1. Name three units of time used in everyday life.

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  2. how many seconds are there in one hour ?

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  3. Name two devices which were used for measuring time in ancient times b...

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  4. Name the device whose periodic motion was used for making clocks till ...

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  5. Name two natural units of time which were used for measuring time in o...

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  6. What name is given to the metallic ball of a simple pendulum ?

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  7. The motion of a simple pendulum is

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  8. Name the material which is used for measuring time in electronic clock...

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  9. Which of the following time measuring devices is most precise

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  10. What is the smallest time interval which can be measured accurately : ...

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  11. What is the smallest time interval which can be measured accurately : ...

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  12. Which of the two is a bigger unit of time microsecond or nanosecond ?

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  13. A pendulum clock becomes

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  14. Which of the two requires an electric cell for its working : a quartz ...

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  15. A boy riding a bicycle covers a distance of 10 m in 40 s. What is the ...

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  16. A bus takes 30 minutes to travel a distance of 25 kilometres. Calculat...

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  17. what is speedmeter ?

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  18. (a) In uniform motion, the path of an object can be a straight line, c...

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  19. What can you say about the motion of an object whose distance-time gra...

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  20. (a) Define speed. What is the SI unit of speed ? (b) What is meant b...

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