9. [-/2 Points] DETAILS OBINPHYSS 6.P.013. l MY NOTES ASK YOUR TEACHER I PRACTICE ANOTHER In a student laboratory exercise, the wavelength of a 58,300 Hz ultrasound wave is measured to be 0.585 cm. Find the air temperature (in K). I: K Need Help? 10. [/2 Points] DETAILS OBINPHYSB 6.P.015. MY NOTES ASK YOUR TEACHER | PRACTICE ANOTHER A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 8.15 m from one of the speakers and 8.19 m from the other. What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20C.) :HZ Need Help? Submit Answer 11. [-/2 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 0.017 seconds after it was emitted. The air temperature is 20C. (a) How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant gures.) :lm (b) How deep (in m) is the snow? Em