Query 15

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course Phy 232

7/15 12pm

015. `Query 13

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Question: `qquery experiment to be viewed and read but not performed: transverse and longitudinal waves in aluminum rod

`what is the evidence that the higher-pitched waves are longitudinal while the lower-pitched waves are transverse?

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Your Solution:

The higher pitched waves were longitudinal because when it was touched on the end the sound changed more rapidly then when the side was touched. The lower pitched waves were transverse because since it has low pitch, the frequency would be lower, and it would not act the same as a longitudinal wave.

confidence rating #$&*:

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Given Solution: `qSTUDENT RESPONSE: The logitudinal waves had a higher velocity.

That doesn't provide evidence that the high-pitched wave was longitudinal, since we didn't directly measure the velocity of those waves. The higher-pitches waves were damped out much more rapidly by touching the very end of the rod, along its central axis, than by touching the rod at the end but on the side.

The frequency with which pulses arrive at the ear determines the pitch.

The amplitude of the wave affects its intensity, or energy per unit area. For a given pitch the energy falling per unit area is proportional to the square of the amplitude.

Intensity is also proportional to the square of the frequency. **

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Self-critique (if necessary): OK

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Self-critique Rating: OK