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16

The equation of a wave traveling along the positive x-direction is given by;
y = 0.25 x 10\(^{-3}\) sin (500t - 0.025x).
Determine the angular frequency of the wave motion.

  • A. 0.25 x 10-3rad s-1
  • B. 0.25 x 10-1rad s-1
  • C. 5.00 x 102rad s-1
  • D. 2.50 x 103rad s-1
View Answer & Discuss (24) JAMB 1999
17
If a sound wave goes from a cold air region to a hot air region, its wavelength will
  • A. increase
  • B. decrease
  • C. decrease then increase
  • D. remain constant
View Answer & Discuss (43) JAMB 1999
18
The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40hz and 180Hz?
  • A. 4
  • B. 3
  • C. 2
  • D. 1
View Answer & Discuss (8) JAMB 1999
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19
A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is
  • A. 3m
  • B. 5m
  • C. 6m
  • D. 10m
View Answer & Discuss (12) JAMB 1999
20
The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a
  • A. concave mirror of focal length 5cm
  • B. concave mirror of focal length 10cm
  • C. convex mirror of focal length 5cm
  • D. convex mirror of focal length 20cm
View Answer & Discuss (41) JAMB 1999
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