Question: As oppositely moving pulses of the same shape (one upward, one downward) on a string pass through each other, there is one instant at which

As oppositely moving pulses of the same shape (one upward, one downward) on a string pass through each other, there is one instant at which the string shows no displacement from the equilibrium position at any point. Has the energy carried by the pulses disappeared at this instant of time? If not, where is it?

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