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It stays the same
It decreases then increases. Amplitude
is zero when it reaches the node.…read more

Slide 4

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The phase difference increases.
The phase difference is 0 degree up until the node and then after
that it is in antiphase.…read more

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A frequency of sound that cannot be heard by humans (high
So that the sound waves do not interfere with each other or cancel each
other out.
So that they know the changing positions of small organisms.…read more

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v = f so = v/f
340 / 70000 = 0.004857m
d = 0.5m one way (1.0m both ways)
t = d/s
1/340 = 0.0029s
0.003s…read more

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