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2351
A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine
  • A. increased the surface tension of the water
  • B. reduces the density of the water
  • C. reduces the surface tension of the water
  • D. reduces the upthrust on the needle
View Answer & Discuss WAEC 2004
2352

On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface

  • A. i and ii only
  • B. ii and iii only
  • C. i and iii only
  • D. i, ii and iii
View Answer & Discuss (5) WAEC 2004
2353
An elastic string of force constant 200N m-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string
  • A. 64.0J
  • B. 80.0J
  • C. 128.0J
  • D. 160.0J
View Answer & Discuss WAEC 2004
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2354
A machine of velocity ratio 5 is used in lifting a load with an effort of 500N. If the machine is 80% efficient. Determine the magnitude of load
  • A. 2500N
  • B. 2000N
  • C. 900N
  • D. 625N
View Answer & Discuss WAEC 2004
2355
The speed of an object in rectilinear motion can be determine from the
  • A. area under a velocity-time graph
  • B. area under a distance-time graph
  • C. slope of a distance-time graph
  • D. slope of a velocity-time graph
View Answer & Discuss WAEC 2004
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