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31. The hydraulic brackes used in automobiles is a direct application of
  • A. Pascal’s law
  • B. Toricellian law
  • C. Bernoulli’s theorem
  • D. Archimede’s principle
32. A falling drop of rain water acquires the spherical shape due to
  • A. viscosity
  • B. gravitational force
  • C. surface tension
  • D. atmospheric pressure
33. In a reactor, cadmium rods are used for
  • A. absorping neutrons
  • B. speeding neutrons
  • C. slowing fast neutrons
  • D. dispersing neutrons
34. The difference between musical sound noise is due to
  • A. pitch
  • B. intensity
  • C. wavelength
  • D. musical instrument
35. Atom bomb is based on
  • A. nuclear fission
  • B. nuclear fusion
  • C. chemical reaction
  • D. artificial radioactivity