Clusters of galaxies are distributed in space ____
a. homogenously
b. isotropically
c. in long, narrow filaments surrounding empty voids
d. statically
e. in bubbles surrounded by empty walls
c
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Standing Waves on a String: A 0.588-m string is tightly clamped at both ends. If the lowest standing wave frequency of the string is 326 Hz, how fast do waves travel on this string?
A. 383 m/s B. 475 m/s C. 582 m/s D. 724 m/s
A starburst galaxy gets this name because
A) it contains far more x-ray bursters than our Milky Way Galaxy. B) it has many stars bursting out of its disk toward intergalactic space. C) it is forming stars so fast that the starburst phase of life must be temporary. D) it contains so many stars that the galaxy's gravity cannot retain them in their orbits.
Inward migration is a hypothesis used to explain why
A) Jupiter-sized planets are seen orbiting close to some stars B) some stars do not have Jupiter-sized planets C) some stars do not have planets at all D) Terrestrial-sized planets are seen orbiting far from some stars
Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
A) The equivalent resistance is equal to that of any one of the resistors. B) The equivalent resistance is equal to average of the four resistances. C) The equivalent resistance is less than that of the smallest resistor. D) The equivalent resistance is less than that of the largest resistor. E) The equivalent resistance is more than the largest resistance.