6. Oscillations and sounds: a. A wave with wavelength B 1'11 and time between crests of 0.5 s is traveling in water. What is wavelength frequency. period. and the wave speed? (5 points) b. You blow into one end elose pipe and produce a tone. Explain what. happens to the frequency oi'the tone il'you open both ends of the pipe and blow into it again? {5 points] 1:. A ear moving away from you at the speed of 50.0 nL-'s while you are standing on the sidewalk. The engine produces sound at B Hz and the speed of sound is 340 nus. What is the frequency you hear? (8 points)