Light of intensity I0 and polarized horizontally passes through three polarizes. The first and third polarizing axes are horizontal, but the second one is oriented 20.0° to the horizontal. In terms of I0, what is the intensity of the light that passes through the set of polarizers?
A) 0.780I0
B) 0.180I0
C) 0.442I0
D) 0.883I0
A
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Which of the following is not expected to provide solid-solution strengthening?
(a) A large substitutional atom in the tensile strain region of an edge dislocation. (b) A small substitutional atom in the compressive strain region of an edge dislocation. (c) A small interstitial atom in the compressive strain region of an edge dislocation. (d) A small interstitial atom in the tensile region of an edge dislocation.
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. E. B. F. C. G. D. H. E. A.
Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?
a. 0.11 b. 0.33 c. 3.0 d. 9.0 e. 12.0
Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s2 until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?