Suppose you're on a hot air balloon ride, carrying a buzzer that emits a sound of frequency f. If you accidentally drop the buzzer over the side while the balloon is rising at a constant speed, what can you conclude about the sound you hear as the buzzer falls towards the ground? Give a short explanation of your answer. a.) The frequency and intensity increase b.) The frequency decreases and the intensity increases c.) The frequency decreases and the intensity decreases d.) The frequency remains the same, but the intensity decreases

Millie loves to go to the park and play on the swings. She gets on her favorite swing and she goes back and forth one time in 2.8 seconds. What can we determine from this question? Select all that apply. A If Millie's frequency increases, the period will decrease. B Millie's frequency is 0.36 Hz. C Millie's swing period is 0.36 seconds. D Millie's wavelength is 20 inches. E Millie's swing period is 2.8 seconds.

Suppose an oncoming ambulance moving at 115 km/h emits a steady 805-Hz sound from its siren.   a. What frequency, in Hz, is received by a person watching the oncoming ambulance? The speed of sound on this day is 345 m/s.  b. What frequency, in Hz, does she observe after the ambulance has passed?

For numbers 4 to 6, consider A sinusoidal wave travels along a string. The time for a particular point to move from maximum amplitude to zero is 0.25 s. 4. What is the period of the wave? A. 0.25 s B. 0.50 s С. 1.0 s D. 2.0 s E. 4.0 s 5. What is the frequency of the wave? A. 0.25 Hz B. 0.50 Hz С. 1.0 Hz D. 2.0 Hz E. 4.0 Hz 6. If the wavelength is 4.0 m; what is the wave speed? A. 0.25 m/s B. 0.50 m/s с. 1.0 m/s D. 2.0 m/s E. 4.0 m/s

You drving in car 1 and your friend is drving in car 2 playing music at a frequency f. Van V is also driving on the same road. 1) Write an equation for the frequency you will hear generated by your friend and bounced off the van. Express the frequency you heard in terms of f.  v car 1 = 100.0 km/h v car 2 = 80.00 km/h v van V = 60.00 km/h

A string on a guitar has a linear mass density of 2.1×10^-3 kg/m and a oscillating length of .62m. It is stretched at a tension of 81.8 N. A.) When the guitar string is plucked, at what speed in meters per second does the pulse travel along the string? B.)Since it produces a tone, what is the fundemental frequency in hertz? C.) When it is properly tuned the fundemental frequency is 146.8 hz. Since this guitar might not be properly tuned, what tension should it be stretched in newtons?

v Question Completion Status: QUESTION 14 The least number of beats per second will be heard from which pair of tuning forks? O a. 763 and 774 Hz O b.534 and 540 Hz C. 256 and 260 Hz d. 200 and 201 Hz QUESTION 15 Which of the following properties of a sound wave determine its "pitch"? a. Frequency b. Amplitude c. Distance from source to detector d. Phase QUESTION 16 A certain vibrating string on a piano has a length of 74.0 cm and forms a standing v Which harmonic does this wave represent? The second harmonic b) Determine the wavelength of this wave. 74cm C) How many nodes are there in the wave pattern? 3 Click Save and Submit to save and submit. Click Save All Answers to save all answers.

17. A 150 W light bulb emits radiation waves spreading out equally in all directions. What is the intensity of this radiation 2.0 m away? " A. 3.0 W/m^2 B. 4.0 W/m^2 C. 12 W/m^2 D. 24 W/m^2 E. 150 W/m^2

Part 1: Trains with passengers A railroad train is traveling at 34.2 m/s in still air. The frequency of the note emitted by the train whistle is 220 Hz. The air temperature is -9°C. A.) What frequency is heard by a passenger on a train moving in the opposite direction to the first at 35.8 m/s and approaching the first? B.) What frequency is heard by a passenger on a train moving in the opposite direction to the first at 35.8 m/s and receding from the first?

A wave source has a wavelength of 0.60 m. Which of the following scenarios could cause the observer to detect a wavelength of 0.90 m? a. The source is moving towards the stationary observer at 18 m/s b. Both the source and observer are moving to the right at 18 m/s c. The source is moving towards the observer at 18 m/s as the observer moves towards the source at 18 m/s d. The source is moving away from the stationary observer at 18 m/s