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851
A faulty barometer reads 72.6cm Hg when the atmospheric pressure is 75.0cm Hg. Calculate the atmospheric pressure when the barometer reads 72.0cn Hg
  • A. 79.4cm Hg
  • B. 74.38cm Hg
  • C. 74.2cm Hg
  • D. 69.4cm Hg
View Answer & Discuss WAEC 2004
852
On a basis of the kinetic theory, an increase in the temperature of a fixed volume of an ideal gas causes
  • A. a incease in the number of gas molecules
  • B. a decrease in the density of the gass
  • C. an increase in the average speed of the gas molecules
  • D. a decrease in pressure exerted by the gas
View Answer & Discuss (1) WAEC 2004
853
The temperature of 900cm3 of an ideal gas at a pressure of 114cm Hg is 27oC. Calculate its volume at 76cm Hg and 0oC
  • A. 50.0cm3
  • B. 546.0cm3
  • C. 659.3cm3
  • D. 1228.5cm3
View Answer & Discuss (8) WAEC 2004
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854
The basic difference between a transverse wave and a longitudinal wave travelling in the same direction in a medium is in the
  • A. amplitude of the wave
  • B. wavelength of the wave
  • C. direction of vibration of the particles of the medium
  • D. period of vibration of the particle of the medium
View Answer & Discuss WAEC 2004
855
A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?
  • A. dispersion
  • B. refraction
  • C. interference
  • D. diffraction
View Answer & Discuss WAEC 2004
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