In 0.001 seconds, a periodic signal completes one cycle. What is the frequency of the event?

You and your friend decided to test out the Doppler Effect. Your friend is in their car, driving towards you at 4.2 m/s, playing a 400 Hz test tone. You are moving towards your friend at 0.5 m/s. At what frequency do you hear this test tone? Assume the speed of sound is 340 m/s. (Recall that we set the POSITIVE x-direction as the direction from the observer to the source)

Item 11 Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000 × 10¹4 Hz. Part A If the galaxy is receding from Earth with a speed of 4125 km/s, what is the frequency of the light when it reaches Earth? Express your answer to four significant figures and include appropriate units. μA Value Submit Units Request Answer ?

1. In still air, with a speed of sound, v= 343.0m/s, a source of sound A is moving directly toward a reflecting surface B. Reflecting surface B is moving directly away from source A. The speed of A is v, =162 km / h and the speed of B is VR = 86.4 km / h. Sound source A emits waves of frequency f, =1200.0 Hz in the frame of A. а. What is the frequency heard by a detector mounted on and moving with reflecting surface B, Bd b. What is the frequency of the reflected wave as heard by a detector mounted on and moving with sound source A, JAd ?

Red light has a frequency of 4.0 x 1014 its wavelength? Hz and a speed of 3.0 x 10° m/s. What is O 750 x 10-7 m O 750 cm O13x10° m O 1.3 10 m O 750 nm 12 m

10 B. Suppose that you put your left ear down against a railroad track, and your friend one kilometer away strikes the track with a hammer. a). How much sooner will the sound get to your left ear than to your right ear? (The speed of sound is about 5950 m/s in steel and 340 m/s in air.) b). Draw a sketch to support your results and include given information, formulas and calculations. Your answer

The string of 5 meters long is clamped at the ends and is vibrating as the third harmonic. The string vibrates up and down with 75 complete vibrational cycles in 6 seconds. Determine the frequency of the wave.

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One fine spring day, the Mayor attends a game at Yankee Stadium. In order to honor him, the announcer commands all 60,000 fans to send a “good old fashioned wave around the stadium.” By rising and sitting in succession, a familiar flurry does indeed make its way through the crowds of people. People watch the theatrics at home on their tv’s and internet feeds. Question: Is it scientifically accurate to refer to this human phenomenon as an example of wave motion? Why or not. Be specific and thorough.