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Doctors Medicines MCQs Q&A

  1. Solids
  2. Gases
  3. Liquids
  4. Vacuum
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1 Answers

Option 1 : Solids

CONCEPT:

  • Sound: A local disturbance whose propagation is facilitated by the collisions between particles this disturbance propagates in a longitudinal wave, imagine one molecule hitting the next molecule, and then that molecule hitting the next, and so forth.
    • It is a mechanical wave that needs a medium to travel.
    • The speed of sound is maximum in solid then it is in liquid and slowest in gases.

EXPLANATION:

  • The distances between molecules in solids are very small, i.e., solids are denser - as compared to liquids and gases.
  • Because they are so close, they can collide very quickly, i.e. it takes less time for a molecule of the solid to 'bump' into its neighbor.
  • Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids. So option 1 is correct.
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