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Physics

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16. A watch based on the oscillating spring is taken from earth to moon, it will
 
  • A. run slow
  • B. run fast
  • C. stop altogether
  • D. give the same time
 
17. When milk is churned cream gets separated due to
 
  • A. gravitational force
  • B. frictional force
  • C. centripetal force
  • D. centrifugal force
 
 
18. We cannot see during a fog because of
 
  • A. refraction
  • B. internal reflection
  • C. scattering of light
  • D. reflection of light
 
19. Earthquake is measured using
 
  • A. seismograph
  • B. altimeter
  • C. barometer
  • D. laser rays
 
20. The term Mach is used to measure speed of
 
  • A. sound
  • B. wind
  • C. ship
  • D. aeroplane