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A 3.8 Hz continuous wave travels on a Slinky. If the wavelength is 0.55 m, what is the speed of waves on the Slinky (in m/s)? m/s Need Help? Read It 7. [-/8.33 Points] DETAILS OBINPHYS8 6.P.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A wave traveling 81 m/s has a wavelength of 4.6 m. What is the frequency of the wave (in Hz)? Hz Need Help? Read It 8. [-/8.33 Points] DETAILS OBINPHYS8 6.P.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A steel cable with total length 48 m and mass 150 kg is connected to two poles. The tension in the cable is 2,346 N, and the wind makes the cable vibrate with a frequency of 2 Hz. Calculate the wavelength of the resulting wave on the cable. m Need Help? Read it 9. [-/8.33 Points] DETAILS OBINPHYS8 6.P.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In a student laboratory exercise, the wavelength of a 42,300 Hz ultrasound wave is measured to be 0.808 cm. Find the air temperature (in K). Need Help? Read It 10. [-/8.33 Points] DETAILS OBINPHYS8 6.P.017. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A sonic depth gauge is placed 3.3 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.015 seconds after it was emitted. The air temperature is -20 C. (a) How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.) (b) How deep (in m) is the snow? m Need Help? Read It 11. [-/8.33 Points] DETAILS OBINPHYS8 6.P.019. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A baseball fan sitting in the "cheap seats" is d = 165 m from home plate (see the figure below). How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan hears the sound? (Assume the speed of sound is 344 m/5, and the vertical distance can be ignored.)