Calculating Wavelength and Intensity in Opposing Phase Vibrations

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SUMMARY

The discussion centers on calculating the wavelength and intensity of waves in opposing phase vibrations, specifically in the context of two decoy ducks vibrating 1.5 meters apart. The participants agree that when two waves are in opposite phase, they are half a wavelength apart. Using a frequency of 1000Hz and a velocity of 10m/s, the largest possible wavelength is determined to be 3 meters, as the distance between the ducks is doubled. Additionally, the conversation touches on the standard intensity of earthquakes, although specific values are not provided.

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hey, i need some help for this question/

Question: A wave passes by two little decoy ducks which are vibraing in opposite phase. They are 1.5m apart. I've two possible wave lengths for this situation.

So I am guessing you have to make up a frequency and velocity, so i was going to use 1000Hz and velocity of 10m/s, to make things easier. Also, since its in opposite phase isn't that half a wavelength?

also does anyone know the standard intensity of a standard earthquake??
 
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Draw a picture of the wave, it'll make things easier. And yes, if they are exactly out of phase, they're half a wavelength apart (or 3/2 wavelengths, or 5/2, etc) since the question probably wants you to find largest possible wavelength (since it could get infinitely smaller) all you have to do is double the distance. The frequency and velocity don't mater, because that only changes how fast they are oscillating! Draw a picture, that'll help you see what I mean.
 
thanx a lot quantum cat, drawing it does help too! but the wavelength would be 1and3/4, not 3/2? if there out of phase.
 
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