What are planetesimals?
A. very small planets
B. satellites of the giant planets
C. large chunks of material (1 mm to several km in size) from which the planets were formed
D. planets that are found orbiting other stars
Answer: C
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Why can't S waves travel through Earth's liquid core? a. Earth's liquid core is creating its own S waves
b. Earth's liquid core causes the seismic activity to be reflected back to its origin. c. Earth's liquid core absorbs the waves. d. Earth's liquid core is too hot and changes the wavelength of the S wave. e. Earth's liquid core does not have the rigidity required for shear waves to travel along.
Directly opposite the Tharsis uplift and volcanoes on Mars lies the deep ________, perhaps suggesting impact cause and volcanic effect
Fill in the blank(s) with correct word
Two light bulbs, a thick-filament one and a thin-filament one, are connected in series to a battery. The voltage is greater across the lamp with the
A) thick filament. B) thin filament. C) same for both
Suppose a solid sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The linear velocity of the sphere at the bottom of the incline depends on
A) the mass of the sphere. B) the radius of the sphere. C) both the mass and the radius of the sphere. D) neither the mass nor the radius of the sphere.