Why is the reflection of a wave at a free boundary different from reflection at a fixed boundary? ?
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Ответ:
Here is the main thing is medium. In the free boundary wave face the air medium, but in a fixed boundary wave face different medium. The change of medium effect on the change of the reflection of wave.
Ответ:
Step-by-step explanation:
18= 31x
divide both sides by the coefficient of x (31)
18/ 31= 31x/31
31 cancels 31
x=18/31 which equals to 18/31