Which of the following statements about the rings of the four jovian planets is not true?
A) All rings lie within their planet's Roche zone.
B) All the particle orbits are fairly circular, near their planet's equatorial plane.
C) All have gaps and ringlets, probably due to gap moons, shepherd moons, and orbital resonances.
D) All probably look much like they did when the solar system first formed.
E) All are made of individual particles of rock or ice that orbit in accord with Kepler's laws: inner ring particles orbiting faster, and outer ring particles orbiting slower.
D
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A multiple-slit diffraction grating has a slit separation of 1.75 × 10^?6 m. Find the wavelength of the monochromatic light that will have its second-order bright fringe diffracted through an angle of 36.0°. (1 nm = 10?9 m)
a. 389 nm b. 868 nm c. 514 nm d. 343 nm e. 257 nm
As the frequency of light increases, its energy ________.
A. moves more slowly B. decreases C. moves more quickly D. increases E. remains constant
A physics student has to make a choice in the color of paint to put on her geosynchronous communication satellite, MYSAT1. Considering most of its orbit is in sunlight, the decision of a light versus dark color paint will depend on which concept below?
A. A light paint would be better in the sunlight and in Earth's shadow for preventing overheating B. A dark paint would overheat the satellite when it passes through Earth's shadow but not in sunlight C. A light paint would be better for keeping the satellite cool in sunlight D. A dark paint would be better for keeping the satellite cool in sunlight
Which voltage is not caused by a source of emf?
a. the voltage across a charged capacitor b. the voltage across two copper-iron junctions at different temperatures c. the voltage across the terminals of a dry cell battery d. the voltage from an electric generator