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4331

In which of the following media is the speed of sound the least?

  • A. Air
  • B. Brass
  • C. Water
  • D. Wood 
View Answer & Discuss WAEC 2019
4332

Which of the following characteristics of waves can a ripple tank be used to demonstrate?
I. Reflection
II. Refraction
III. Diffraction
 

  • A. I, II and Ill
  • B. ll and ll only
  • C. l and lII only
  • D. I and II only 
View Answer & Discuss (2) WAEC 2019
4333

Which of the following graphs gives the correct relationship between energy and mass when mass is converted to energy.

 

 

  • A. A
  • B. B
  • C. C
  • D. D
View Answer & Discuss (5) WAEC 2019
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4334

An 800 kg car moving at 80 km hr\(^{-1}\) collides with a 1200 kg car moving at 40 km hr\(^{-1}\) in the same direction. If the cars stick together, calculate their common velocity.

  • A. 60 km hr\(^{-1}\) 
  • B. 8 km hr\(^{-1}\)
  • C. 40 km hr\(^{-1}\) 
  • D. 56 km hr\(^{-1}\)
View Answer & Discuss (12) WAEC 2019
4335

The mass of a load is doubled while the force acting on it is halved. The resulting acceleration of the load is

  • A. quadrupled
  • B. quartered
  • C. halved
  • D. doubled
View Answer & Discuss (15) WAEC 2019
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