What causes the geological activity seen on some of the inner moons of Jupiter?
a. Constant collisions with space debris provide a power source for geological activity.
b. The strong magnetic field of Jupiter heats the surface of the inner moons.
c. Tidal friction as a result of being so close Jupiter heats their interiors.
d. Solar radiation reflected of Jupiter's surface provides a power source for geological activity.
c
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A 12.0 V battery is placed across a 4.00
resistor. If the current through the resistor is 2.80 A, what is the terminal voltage of the battery?
A. 12.0 V B. 12.8 V C. 11.6 V D. 11.2 V E. 9.6 V
A type II supernova
a. occurs when a white dwarf's mass exceeds the Chandrasekhar limit. b. is the result of helium flash. c. is characterized by a spectrum that shows hydrogen lines. d. occurs when the iron core of a massive star collapses. e. is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses.
Relate Seyferts to spirals
What will be an ideal response?
Star A has the peak of its blackbody radiation at lA. Star B has its peak at lB, which is one-third that of lA. If Star A's surface temperature is TA, how does the surface temperature TB of Star B compare?
a. TB = TA/9 c. TB = 9 TA b. TB = 3 TA d. TB = TA/3