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A stationary wave on a string is y = 2a cos(kx) sin(wt). All particles pass their mean positions:
Aat different instants
Bonly at the antinodes
Ctogether, twice each cycle
Donly once every cycle
Answer & Solution
Correct answer: C. together, twice each cycle
The sin(wt) factor is common to all points, so every particle crosses the mean position together twice per cycle.
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