Astring with a length of 4 m is held under a constant tension. the string has a linear mass density of μ = 0.006 kg/m. two resonant frequencies of the string are 400 hz and 480 hz. there are no resonant frequencies between the two frequencies. (a) what are the wavelengths of the two resonant modes? (b) what is the tension in the string?

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b. compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength