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946

A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?

  • A. 2.0cm
  • B. 3.3cm
  • C. 5.0cm
  • D. 10.0cm
  • E. 15.0cm
View Answer & Discuss (7) WAEC 1996
947
Which of the following instruments produces sound by the vibration of air column?
  • A. Piano
  • B. Guitar
  • C. Flute
  • D. Hand bell
  • E. Talking drum
View Answer & Discuss WAEC 1996
948
The walls and ceilings of many standard auditoria are covered with perforated pads to
  • A. increase the intensity of sound waves
  • B. increase the loudness of sound waves
  • C. reduce the effect of reverberations of sound waves
  • D. increase the interference effect of sound waves
  • E. decrease the frequency of sound waves.
View Answer & Discuss (5) WAEC 1996
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949
A string of length 1.0 m vibrates in 10 loops. If the total mass of the string is 1.0 x 10-3 kg and the tension in it is 10N, calculate the frequency of the vibration.
  • A. 50Hz
  • B. 100Hz
  • C. 250Hz
  • D. 400Hz
  • E. 500Hz
View Answer & Discuss (10) WAEC 1996
950
The distance between two successive crests of a water is 1m. lf a particle on the surface of the water makes two complete vertical oscillations in 1 second, calculate the speed of the wave
  • A. 0.5 ms-1
  • B. 1.0 ms-1
  • C. 2.0ms-1
  • D. 3.0ms-1
  • E. 4.0ms-1
View Answer & Discuss (11) WAEC 1996
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