Why are Saturn's rings so thin?
A) The "gap" moons shepherd the particles and maintain its thin profile.
B) Any particle in the ring with an orbital tilt would collide with other ring particles, flattening its orbit.
C) The current thinness is a short-lived phenomenon that is special to this time.
D) Saturn's gravity prevents particles from migrating upwards out of the rings.
E) Solar radiation pressure keeps particles pressed into the rings.
B
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How can the description of the atom given by the Schrödinger equations be visualized?
a. As a sphere with electrons distributed through a solid positively charged core, like a plum pudding. b. As a miniature solar system. c. As a nucleus surrounded by an electron cloud. d. As a positively charged nucleus connected to a negatively charged electron shell by a spring. e. An empty box with just one atomic particle in it.
The rule for the interaction of magnetic poles is similar to the rule for electric
A) circuits. B) polarization. C) charges.
Velocity Addition: Consider three galaxies, Alpha, Beta and Gamma. An astronomer in Beta sees each of the other two galaxies moving away from her in opposite directions at 0.70c. At what speed would an observer in Alpha see the galaxy Beta moving?
A. 0.82c B. 0.70c C. 0.94c D. 0.35c E. 0.57c
Spectra show that the moons of Uranus contain frozen water, although their surfaces are _______________
Fill in the blank(s) with correct word