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806
The speed of sound in air is is directly proportional to
  • A. its temperature on the celsius scale
  • B. ite temperature in the thermodynamic scale
  • C. the cube root of its temperature on its celcius csale
  • D. the square roor of its temperature on the absolute scale
View Answer & Discuss WAEC 2003
807
A sonometer wire of linear density 0.08kg m-1 subjected to a tension of 800N is plucked. Calculate the speed of a pulse which moves from one end of the wire to the other
  • A. 179.0ms-1
  • B. 100.0ms-1
  • C. 15.8ms-1
  • D. 8.0ms-1
View Answer & Discuss WAEC 2003
808
Which of the following instruments gives a pure note when sounded?
  • A. talking drum
  • B. siren
  • C. tunning fork
  • D. guitar
View Answer & Discuss (2) WAEC 2003
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809
Which of the following features of an electrostatic line of force is not correct?
  • A. it is an imaginary line which a positive charge will describe if it is free to move
  • B. the tangent drawn at any point on a curved line of force shows the direction of the electric field intensity at that point
  • C. it is sometimes curved
  • D. it can cross another line of force in a region of intense electric field
View Answer & Discuss WAEC 2003
810

Which of the following statement about force is correct ?

  • A. electrostatic, gravitational and magnetic forces are always attractive
  • B. electric, gravitational and magnetic field obeys inverse square law
  • C. fields are real but their corresponding field lines are imaginary
  • D. field lines and their corresponding fields are both real
View Answer & Discuss (2) WAEC 2003
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