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3206

An astronaut is walking on the moon where the magnitude of the acceleration due to gravity "g’ is one-sixth that on earth. Compared with their magnitudes on the earth, his mass and weight on the moon are

  • A. both less
  • B. less and the same respectively
  • C. the same and less respectively
  • D. the same as on earth
  • E. both greater.
View Answer & Discuss (3) NECO 2001
3207
Which statement is NOT correct about molecules?
  • A. The number of molecules in a unit volume of a solid is greater than that in a unit volume of a liquid or gas.
  • B. Molecules are made up of atoms
  • C. The force of attraction between two molecules of a solid is greater than that between two molecules of a liquid or gas
  • D. Molecules of gases are in regular motion
  • E. Molecules of a solid vibrate about their mean positions.
View Answer & Discuss (6) NECO 2001
3208
The inside of a vacuum flask is usually coated with silver to reduce heat loss by
  • A. condensation
  • B. conduction
  • C. convection
  • D. evaporation
  • E. radiation
View Answer & Discuss (4) NECO 2001
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3209
What is the angular velocity of an object in a horizontal circular path of radius 1.5m with a constant speed of 12ms-1?
  • A. 1.6 rads-1
  • B. 4.0 rads-1
  • C. 8.0 rads-1
  • D. 16.0rads-1
  • E. 32.0 rads-1
View Answer & Discuss (5) NECO 2001
3210

A wave is represented by the equation y = 0.5 sin 0.4π(X - 60t), where the distance (X) is measured in centimetres and time (t) in seconds. What is the wavelength of the wave?

  • A. 0.2cm
  • B. 0.4cm
  • C. 0.8cm
  • D. 5.0cm
  • E. 10.0cm
View Answer & Discuss (5) NECO 2001
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