Physics
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

2.0958333333333
0.12847222222222
1.0479166666667
0.21041666666667

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Physics
A standing wave occurs when

The speed of the wave is zero or near zero
The amplitude of a wave exceeds its wavelength
A wave reflects upon itself
Two waves overlap

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