Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 500 Hz. What is the frequency heard by the driver of the lead car? (Vsound = 340 m/s) A 540 Hz B 463 Hz 579 Hz D 500 Hz

Two trains on separate tracks move toward one another. Train 1 has a speed of 120 km/h, train 2 a speed of 65.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345 m/s.) Hz

16. A police car has an 800-Hz siren. It is traveling at 35.0 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standing along the roadside. What change of frequency does the observer hear? a) 0 Hz b) 82 Hz c) 166 Hz d) 249 Hz

Going down the road at 65 miles per hour on a 86.0 °F summer day, Bari heard a siren approaching. Bari knows that a police siren's frequency is 1280.0 Hz, but it didn't sound like that. Bari pulled over a lane, without slowing down, after seeing the flashing lights of the police car coming up from behind, and the police passed going 25 miles per hour faster than Bari was going. (1 mile = 1.60 km) a) what was the speed of sound on that warm summer day? b) How fast, in m/s, was the police car going? c) What frequency did Bari hear from the siren before the police car passed? d) What frequency did Bari hear from the siren after the police care had passed?

30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?

If a 20.0 cm cup is being filled with water, the fundamental frequency of sound when the cup is 55.0 % full will be: Part A 1560 Hz 780 Hz 953 HZ O 1910 Hz

A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 4.2 x 10-³ W/m². What is the total sound power P emitted by the source? P = Number 1 Units

You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive the frequency as 1370 Hz. You are relieved that he is in pursuit of a different speeder when he continues past you, but now you perceive the frequency as 1330 Hz. What is the speed of the police car? The speed of sound in air is 343 m/s.

Sound 1 has an intensity of 36.0 W/m2. Sound 2 has an intensity level that is 2.3 dB greater than the intensity level of sound 1. What is the intensity of sound 2?

The instrument known as the clarinet has a length of 42 cm, and is open at one end and closed at the other. The speed of sound in air is 343 m/s. What is the lowest frequency that can be sounded on the clarinet (i.e. the fundamental, or first harmonic). Group of answer choices 408 hz 51 hz 204 hz 816 hz 102 hz