Q: Following a collision in outer space, a copper disk at 850
Following a collision in outer space, a copper disk at 850°C is rotating about its axis with an angular speed of 25.0 rad/s. As the disk radiates infrared light, its temperature falls to 20.0°C. No ex...
See AnswerQ: At rest, a car’s horn sounds the note A (440
At rest, a car’s horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car’s speed hears a frequency...
See AnswerQ: An alert physics student stands beside the tracks as a train rolls
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 465 Hz when the train is approaching him and 441 Hz when the train i...
See AnswerQ: A tuning fork vibrating at 512 Hz falls from rest and accelerates
A tuning fork vibrating at 512 Hz falls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork when waves of frequency 485 Hz reach the release point?
See AnswerQ: Expectant parents are thrilled to hear their unborn baby’s heartbeat, revealed
Expectant parents are thrilled to hear their unborn baby’s heartbeat, revealed by an ultrasonic motion detector. Suppose the fetus’s ventricular wall moves in simple harmonic motion with amplitude 1.8...
See AnswerQ: A supersonic jet traveling at Mach 3.00 at an altitude
A supersonic jet traveling at Mach 3.00 at an altitude of h = 2.00 x 104 m is directly over a person at time t = 0 as shown in Figure P14.35. Assume the average speed of sound in air is 335 m/s over t...
See AnswerQ: A yellow submarine traveling horizontally at 11.0 m/s
A yellow submarine traveling horizontally at 11.0 m/s uses sonar with a frequency of 5.27 x 103 Hz. A red submarine is in front of the yellow submarine and moving 3.00 m/s relative to the water in the...
See AnswerQ: Two cars are stuck in a traffic jam and each sounds its
Two cars are stuck in a traffic jam and each sounds its horn at a frequency of 625 Hz. A bicyclist between the two cars, 4.50 m from each horn (Fig. P14.37), is disturbed to find she is at a point of...
See AnswerQ: The acoustical system shown in Figure P14.38 is driven by
The acoustical system shown in Figure P14.38 is driven by a speaker emitting sound of frequency 756 Hz. (a) If constructive interference occurs at a particular instant, by what minimum amount should t...
See AnswerQ: The ship in Figure P14.39 travels along a straight line
The ship in Figure P14.39 travels along a straight line parallel to the shore and a distance d = 600 m from it. The shipâs radio receives simultaneous signals of the same frequency f...
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