If you want to design a phototube that ignores all visible light, what should its cathode’s work function be?
A. Below 1.77 eV
B. Any value between 1.77 eV and 3.1 eV
C. Some specific value between 1.77 eV and 3.1 eV
D. Above 3.1 eV
E. Some other value or range (specify)
D. Above 3.1 eV
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Which arrow best indicates the direction of the electric field at point P created by particle C?
A. A B. B C. C D. D E. Zero F. AA G. BB H. CC I. DD
Jack and Jill are both traveling straight north. Jack is walking at 4 mph, while Jill is riding a bicycle at 12 mph. Regarding their speeds and velocities:
A) they both have the same speed and the same velocity. B) they have different speeds and different velocities. C) they both have the same speed but different velocities. D) they have different speeds, but the same velocity. E) None of the above.
Carnot Engine: An ideal Carnot engine is operated between a hot and a cold reservoir. The temperature difference between the two reservoirs is 284°C. If the efficiency of this ideal engine is 24.0%, find the temperature of the cold reservoir in degrees Celsius.
Fill in the blank(s) with the appropriate word(s).
In an ideal case rays coming from an object toward a lens or mirror should be reasonably close to the optic axis. To the extent that this condition is not completely met, which one of the following effects occurs?
a. spherical aberration b. mirages c. chromatic aberration d. light scattering