At what rate is thermal energy being generated in the 2R-resistor when ? = 12 V and R = 3.0 ??
a.
12 W
b.
24 W
c.
6.0 W
d.
3.0 W
e.
1.5 W
c
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The chemical abundance of population I stars
a. indicates that they were formed before the population II stars. b. indicates that the material they formed from had been enriched with material from supernovae. c. indicates that they contain very few heavy metals compared to halo stars. d. depends on the temperature of the star. e. depends on the mass of the star.
Tripling the focal length of a telephoto lens, while holding aperture size constant, 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. 0.50
Due to the dual nature of light and matter, either can act in an experiment as if it is a wave or a particle. In which experiment is the wave aspect exhibited for matter?
a. the Davisson and Germer experiment b. Wien's law determinations c. the Stern-Gerlach experiment d. the photoelectric effect
You are conducting an experiment with a converging lens and have set it up to produce a real image of a tree in the distance. You then cover the top half of the lens with opaque paper. What occurs?
A. The bottom half of the image is missing B. Nothing happens C. The image becomes half as large D. The image is complete, but dimmer than it was E. The top half of the image is missing