Bats emit ultrasonic waves with a frequency as high as 2.000 ×105 Hz.  What is the wavelength of such a wave in air of temperature 25.00°C? in mm

3. The frequency of a tornado siren is 1,000 Hz. If a cyclist is moving toward the siren at 10 m/s in 15 °C air, which has a speed of sound of 340 m/s, what is the frequency that the cyclist observes? V=V f = f obs source V=V Sobe = ? I source V source questions continued on next page Unit 6C Practice Problems Copyright 2018 Georgia Public Broadcasting. All rights reserved. Use or distribution by an unintended recipient is prohibited.

5. A quantum object travels directly toward you at a constant rate while producing a sound with a singular frequency of 440 Hz. While you stand still, the object passes through you and continues Moving (you are uninjured). You measure an overall shift in the frequency you hear to be 25.0 Hz. Assume is it 20.0 °C during this shift. a) What is the speed of this particle? b) After is passes through you, you notice that your wallet is missing and see it attached to this particle. You begin accelerating toward the particle at a constant rate of 1.50 m/s² via ion propelled roller shoes. At what time do you perceive a frequency of 435 Hz? c) You stop accelerating when you perceive a frequency of 435 Hz and continue to travel at a constant rate at which time the particle then instantaneously reverses it path to return your wallet, traveling back toward you at its same constant rate which it initially had. What frequency do you then perceive at it travels toward you?

A tranverse wave in a medium wave is described by the following equation: y(x,t) = (12 m)cos(3.0x - 120t). What is the speed of this wave? (x and y describe real space with units of meters, and t is time in seconds.)   a. 30 m/s   b. 50 m/s   c. 60 m/s   d. 70 m/s   e. 40 m/s

The highest frequency sound humans can hear is about 20,000 HzHz. 1. What is the wavelength of sound in air at this frequency? 2. What is the wavelength of the lowest sounds we can hear, about 20 HzHz?

49. What will most likely happen to a ringing bell if placed inside a bell jar connected to a vacuum pump? A. The sound intensity will increase.B. The sound intensity will decrease.C. Frequency of the sound will decrease.D. The speed of sound will increase.

1. A wave has a length of 30.0 cm and a velocity of 2.5 cm/s. If it has a velocity of 3.70 cm/s when it enters a new medium, what is the wavelength?

4. A car is driving away at 30m/s from a speaker that is generating a 550Hz sound. 343m/s. What frequency does the driver of the car hear? The speed of sound in air is 550Hz 30m/s

27. A water wave travels at a speed of 6 m/s with a wavelength of 200 cm. What is the frequency of this wave?   A. 12 Hz   B. 0.003 Hz   C. 3 Hz      D. 0.6 Hz   E. 24 Hz

Hey 691HZ wave is moving through medium A at 9121M/S. And then passes into medium B and has a wavelength of 4.4 m Determine the frequency and wave speed of the wave in medium b