Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Question
Chapter 12, Problem 8P
To determine
Find the length of the device required to generate electricity of
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HW
1) What is the maximum strength of the B field in an electromagnetic wave that has a maximum E-field
strength of 1000 V/m?
2) The beam from a small laboratory laser typically has an intensity of about 1.0 x 10-3 W/m2.
Assuming that the beam is composed of plane waves, calculate the amplitudes of the electric and
magnetic fields in the beam.
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1/10/2022
Dr AQEEL SAUM
Ralu
Current Attempt in Progress
A violin string 17.4 cm long and fixed at both ends oscillates in its n = 1 mode. The speed of waves on the string is 238 m/s, and the
speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
(a) Number
i
Units
(b) Number
i
Units
eTextbook and Media
One method of producing energy is to use a tapered channel (TAPCHAN),
which diverts sea water into a reservoir as shown in the figure. As a wave
approaches the shore through the closed tapered channel at A, its height
will begin to increase until it begins to spill over the sides and into the
reservoir. The water in the reservoir then passes through a turbine in the
building at C' to generate power and is returned to the sea at D. If the
speed of the water at A is VA = 2.5 m/s, and the water depth is
hA = 3.4 m. Assume the fluid is an ideal fluid, that is, incompressible
and frictionless. (Figure 1)
B
Determine the minimum height hB at the back B of the channel to prevent the water from entering the reservoir.
Express your answer to three significant figures and include the appropriate units.
Chapter 12 Solutions
Sustainable Energy
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