Two loudspeakers emit 600 HzHz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck. You hear 9.00 beats per second as the truck drives away from you.What is the truck's speed?

You have a summer job working for a basketball camp. The child who wins the dribbling competition can dribble a basketball with a frequency of 2.05 Hz. How long does it take her to complete 16 dribbles?

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?

solving for b. Oil explorers often set off explosives to make loud sounds, then listen for the echoes from underground oil deposits. Geologists suspect that there is oil under 520-m-deep Lake Physics. It's known that Lake Physics rests on top of solid granite. The speed of sound in water is 1480 m/s and the speed of sound in granite is 6000 m/s.   a. If an explosion is created at the surface of the lake, what time after the explosion do the explorers expect to hear an echo from the bottom of the lake in seconds?   t bottom = 0.703 sec. b. In addition to the expected echo from the bottom of the lake, explorers also detect a faint echo 0.960 s after exploding the dynamite at the lake surface. If it's really oil, how deep will they have to drill through the granite to reach it in meters?

A 24 g string is under 25 N of tension. A pulse travels the length of the string in 60 ms. How long is the string?

Two trucks pass each other in opposite directions, one of them beeping its horn at frequency of 540HZ. What is the wavelength of the horn by the other driver before crossing each other? [velocity of either truck is 75km/h and that of sound is 332m/s] A. 0.65m B. 1.53m C. 398m D. 0.83m A O со DO B O DELL FO F10 F11 tes. R D F G B N T Alt

the car driver? *22.33. A 500-Hz train whistle is heard by a stationary observer at a frequency of 475 Hz. What is the speed of the train? Is it moving toward the observer or away from the observer? Ans. 18.1 m/s, away

Two motors sitting near each other in a factory at slightly different rates. One runs at 805.0 rpm and the other at 775.0 rpm. You hear the combined sound intensity from the motors increase and then decrease periodically due to wave interference. What is the period of beats in seconds?

21.13. A horizontal spring is jiggled back and forth at one end by a device that makes 80 oscillations in 12 s. What is the speed of the longitudinal waves if condensations are separated by 15 cm as the wave progresses down the spring? Ans. 1.00 m/s

Pr5. Two identical loudspeakers are located at points (-10,0,0) and (0,0, 10) of our coor- dinate system, where the numbers in the brac- kets correspond to the (r, y, z) coordinates of the points, expressed in meters. The loudspeakers are driven by the same oscillator with a frequ- ency of 170 Hz. The speed of sound in air can be considered 340 m/s. a) Give the coordinates of those points loca- ted on the positive r axis where the sound waves coming from the two loudspeakers interfere con- structively. b) A receiver is started to move slowly from the origin (0,0,0) along a path lying in the r-y plane so that it receives constant sound intensity throughout its slow motion. What is the shape of the path the receiver should take?