The Earth's axis tilt has changed little over its history due to
A) the stabilizing effects of Jupiter's gravity
B) the stabilizing effects of the Sun's gravity
C) the stabilizing effects of the Moon's gravity
D) its rapid rotation
C
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In the hypothetical situation considered in section E18.1, the disturbance in the magnetic field that the jostled charged sheet creates on the x = 0 plane at time t = T reaches position x = R at time
A. t = T ? R/c. B. t = T. C. t = T + R/c. D. One cannot answer without more information.
Why is Io more volcanically active than our moon?
A. Io is much larger. B. Io has a higher concentration of radioactive elements. C. Io has a different internal heat source.
Why do white-dwarf supernovae all have the same maximum luminosity?
What will be an ideal response?
Satellite Motion: A satellite having orbital speed V orbits a planet of mass M. If the planet had half as much mass, the orbital speed of the satellite at the same distance from the center would be
A. V
.
B. 2V.
C. V.
D. V/
.
E. V/2.