If all of the asteroids in the solar system were gathered into a single object, how big would it be once gravity compressed it?
A) about half the diameter of Earth's Moon
B) about the size of Earth's Moon
C) about the size of the Earth
D) about the size of a Neptune
A) about half the diameter of Earth's Moon
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How does the diameter of the disk of the Milky Way Galaxy compare to its thickness?
A) The diameter is about 100 times as great as the thickness. B) The diameter and thickness are roughly equal. C) The diameter is about 10 times as great as the thickness. D) The diameter is about 100,000 times as great as the thickness.
An un-stretched hanging spring is 50 cm long. Suspending a 100-N block from it increases its length to 60 cm. Adding another 100-N block makes the spring's length
A) 60 cm. B) 70 cm. C) 80 cm. D) 100 cm. E) 120 cm.
Three identical resistors are connected in parallel to a battery. If the current of 12. A flows from the battery, how much current flows through any one of the resistors?
A) 12 A B) 4 A C) 6 A D) 18 A E) 36 A
For the same temperature increase in a system, the change in entropy, ?S, is largest in a reversible
a. constant-volume process. b. constant-pressure process. c. adiabatic process. d. process in which no heat is transferred. e. process in which no work is performed.