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Essential properties of the medium for wave propagation:
(i) Elasticity: So that particle can return to their mean position, after having been disturbed.
(ii) Inertia : So that molecules can save energy and overshoot their mean position.
(iii)Minimum friction amongst the particles of the medium.
(iv)Uniform density of the medium.
What is force
Determine the divergence of the vector field at (1, 1, 0).
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