Triton has a retrograde orbit around Neptune. This means that ____________
a. Triton orbits in the same direction as Neptune rotates on its axis.
b. Triton orbits in the opposite direction to the way Neptune rotates on its axis.
c. Triton does not orbit around Neptune. Instead, it stands still.
b
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What happens to the amplitude of the induced emf when the rate of rotation of a generator coil is doubled?
1.It becomes four times larger. 2.It becomes two times larger. 3.It is unchanged. 4.It becomes one-half as large. 5.It becomes one-fourth as large.
Two stars, A and B, have the same emissivity, but the radii and surface temperatures are different with RA = 2 RB, and TA = 0.5 TB. Assuming the temperature of space to be negligible, which star radiates the most energy per unit time?
a. Star A b. Star B c. Both radiate the same amount of energy per unit time. d. More information is needed in order to make a determination.
Upon being struck by 240-nm photons, a metal ejects electrons with a maximum kinetic energy of
What is the work function of this metal? (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J) A) 3.73 eV B) 3.13 eV C) 4.33 eV D) 4.92 eV
Which of the following statements best describes Kepler's 3rd law of planetary motion?
a. The smaller the diameter of a planet, the faster its rotational period is. b. The orbital period of a planet is directly proportional to the diameter of the planet. c. The smaller the orbit, the longer its orbital period is. d. The larger the orbit, the longer its orbital period is.