Question

For propagation of a mechanical wave, the medium must possess

• A. inertia
• B. conductivity
• C. plasticity
• D. elasticity

Answer 1

Answer: (A), (D)

The correct options are
A inertia
D elasticity

• MEDIUM SHOULD BE ISOTROPIC: The properties of the medium should be the same in all directions.
  
• ELASTICITY : The medium should have elasticity so that the particles return back to their original positions after being displaced.
  
• INERTIA : This allows the particles to store kinetic energy.
  
• MINIMUM FRICTION : So that the particles oscillate and the wave travels for a sufficiently long time and distance.
  
• these were the properties required for propagation of mechanical waves , so the answer is A and D.