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1216
I. It is a rapid, constant and irregular motion of tiny particles. II. It gives evidence that tiny particles of matter called molecules exist. III. It takes place only in gases. IV. It gives evidence that molecules are in a constant state of random motion. which of the combinations above is correct about Brownian notion?
  • A. I,II and III only
  • B. II,III and IV only
  • C. I,III and lV only
  • D. l, ll and lV only
View Answer & Discuss (9) JAMB 2012
1217

The equation of a wave traveling in a horizontal direction is expressed as y = 15 sin \(\frac{2\pi}{5}\) (60t - x). What is its wavelength?

  • A. 60m
  • B. 15m
  • C. 5m
  • D. 2m
View Answer & Discuss (15) JAMB 2012
1218

Which of the following factors will affect the velocity of sound?

  • A. An increase in the pitch of the sound
  • B. An increase in the loudness of the sound
  • C. Wind travelling in the same direction of the sound
  • D. A change in the atmospheric pressure at constant temperature
View Answer & Discuss (12) JAMB 2012
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1219

The characteristic of a vibration that determines its intensity is the

  • A. Frequency
  • B. Overtone
  • C. Wavelength
  • D. Amplitude
View Answer & Discuss (3) JAMB 2012
1220
Where can a man place his face to get an enlarged image when using a concave mirror to shave?
  • A. Between the centre of curvature and the principal focus
  • B. At the principal focus
  • C. Between the principal focus and the pole
  • D. At the centre of curvature
View Answer & Discuss (4) JAMB 2012
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