<span>The momentum before the collision is equal to the momentum after the collision</span>
Answer:
the soap sinks because it is more dense than the duck.
The answer is c
Distance/speed=time
Therefore 4000/500=8
The wavelength of the first harmonic of the standing wave is 2L.
<h3>What is a standing wave?</h3>
A standing wave is one in which the obvious points remain fixed as the vibration continues. A standing wave occurs in a wind instrument such as a trumpet, saxophone etc.
We know from the formula of the first harmonic that the wavelength of the first harmonic of the standing wave is 2L.
Learn more about standing wave:brainly.com/question/1121886?
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