College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question 22
18) A wire with a current of 2.8A is at an angle of 36
degrees relative to a magnetic field of 0.88 T. Find the
force exerted on a 2.25 m length of wire?
19) Waves on a particular string travel with a speed of
16 m/s. By what factor should the tension in the string
be changed to produce waves with a speed of 32 m/s?
20) The intensity level of sound of a truck is 92 deci-
bels. What is the intensity of this sound? Io:
10-12
21) A train moving with a speed of 32 m/s sounds a
140 Hz horn. What frequency is heard by an observer
standing near the tracks as the train approached?
22) Two sources emit waves that are in phase with each
other. What is the longest wavelength that will give
constructive interference at an observation point of 161
m from one source and 295 m from another source?
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Transcribed Image Text:18) A wire with a current of 2.8A is at an angle of 36 degrees relative to a magnetic field of 0.88 T. Find the force exerted on a 2.25 m length of wire? 19) Waves on a particular string travel with a speed of 16 m/s. By what factor should the tension in the string be changed to produce waves with a speed of 32 m/s? 20) The intensity level of sound of a truck is 92 deci- bels. What is the intensity of this sound? Io: 10-12 21) A train moving with a speed of 32 m/s sounds a 140 Hz horn. What frequency is heard by an observer standing near the tracks as the train approached? 22) Two sources emit waves that are in phase with each other. What is the longest wavelength that will give constructive interference at an observation point of 161 m from one source and 295 m from another source?
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