COLLEGE PHYSICS,VOLUME 1
2nd Edition
ISBN: 9781319115104
Author: Freedman
Publisher: MAC HIGHER
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Chapter 17, Problem 33QAP
To determine
The amount of energy released in a cloud-to-ground lightning strike.
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A mirror hangs 1.67 m above the floor on a vertical wall. A ray of sunlight, reflected off the mirror, forms a spot on the floor 1.41 m from the wall. Later in the day, the spot has moved to a point 2.50 m from the
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(a) What is the change in the angle of elevation of the Sun, between the two observations?
It is not (theta 1i) or (pi/2 - theta 2i)
Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.250 mW.
(a) If such a laser beam is projected onto a circular spot 3.40 mm in diameter, what is its intensity (in watts per meter squared)?
27.5
W/m²
(b) Find the peak magnetic field strength (in teslas).
8.57e-7
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(c) Find the peak electric field strength (in volts per meter).
144
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Chapter 17 Solutions
COLLEGE PHYSICS,VOLUME 1
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