What evidence suggests that Enceladus has ongoing geological activity?
A) Voyager 2 photographed liquid nitrogen geysers 10 kilometers tall.
B) Lack of impact craters on much of its surface, evidence of ice flows from possible volcanic activity, and geysers that supply material for the E-ring.
C) Voyager 1 showed sulfur eruptions all over its pizza-pie colored surface.
D) Enceladus is located within Saturn's Roche limit, and ready to blow up.
E) Enceladus undergoes severe tidal stresses from its resonance with Titan.
B
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Jane has about $536 in her checking account, about $2107 in her savings account and exactly $7.62 in her purse. To the best precision possible, how much money does Jane have?
A) $2651 B) $2,650 C) $2,650.6 D) $2,650.62 E) $2,650.620
A 15.0-kg child is sitting on a playground teeter-totter, 1.50 m from the pivot. What is the minimum distance, on the other side of the pivot, such that a 220-N force will make the child lift off the ground?
A) 1.00 m B) 1.50 m C) 0.102 m D) 9.78 m E) 2.35 m
Sound: What characteristics of a sound wave are related to the "pitch" of a musical note? (There could be more than one correct choice.)
A. amplitude B. wavelength C. frequency D. period
A watermelon is a good example of
a. a compound. b. an element. c. a homogeneous mixture. d. a heterogeneous mixture.