why people build walls around themselves as a self protection to shield themselves from the group nation or individual cultural racial/ethnic inequality.gander and religious issues that we all face
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Ответ:
Wave speed = (frequency) x (wavelength)
3 m/s = (10 / sec) x (wavelength)
Divide each side by (10/s) :
Wavelength = (3 m/s) / (10 / s)
Wavelength = 0.3 meter