Which of the following statements is true of Charon, Pluto's moon?
A) Its orbital period is 21 days.
B) It is responsible for tidal heating.
C) It is made up of 60 percent water.
D) Its motion is retrograde.
D
You might also like to view...
Intensity of Sound: You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces to
A. one-half its original value. B. one-fourth its original value. C. one-sixteenth its original value. D. None of these
A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A) 15 nJ B) 3.6 nJ C) 11 nJ D) 7.7 nJ
A ____________ is a large, bright, gaseous feature extending outward from the Sun's surface, often in a loop shape.
A) Sunspots B) Prominence C) Solar flare D) Photosphere
A perfectly black sphere 18.0 cm in diameter is held at a temperature of 215°C
(? = 5.670 × 10-8 W/m2 ? K4, Wien displacement law constant is 2.90 × 10-3 m ? K, h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s) (a) Near what wavelength does this sphere radiate most strongly? (b) If all the radiated energy were at the wavelength found in part (a), how many photons would the sphere emit each second?