COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 21, Problem 74QAP
To determine
The inductance of the Hearing aid circuit containing a 10- μF capacitor so that it resonates at 1500 Hz.
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A tsunami (sometimes inaccurately called a “tidal wave”) is a fast moving ocean wave caused by an underwater earthquake. The water first goes down from its normal level to its lowest level, then rises to its highest level above normal. The time it takes to go from lowest level to highest level, and back to lowest level is 15 minutes. The tidal wave continues this pattern until it crashes onto shore. Suppose a tsunami with amplitude of10 meters approaches Honolulu, HI where the normal depth of water is 9meters. Assume the tsunami varies in depth of water sinusoidally with time as it approaches the pier.
a) Sketch the graph of the water depths from 0 to 15 minutes.b) Find a particular equation expressing water depth as a function of time.
c) What does a negative water depth mean (keeping in mind that there can’t be less than zero water)?
A sinewave has a frequency of 685 Hz (cycles per second). What is the corresponding period of this sinewave expressed in msto 3 significant figures (see Study Note 7.1 in the Using Numbers (maths) booklet)?
If the time period value you calculated above, is now reduced by a factor of 3, what will be the resulting frequency of the sinewave? Express your answer in kHz to 3 significant figures.
Note: In the second part of this question, to avoid possible rounding errors in your calculations, use the actual sinewave period value from the first part, not the rounded value to 3 significant figures.
Chapter 21 Solutions
COLLEGE PHYSICS
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