If we know the size of an asteroid, we can determine its density by
A) comparing its reflectivity to the amount of light it reflects.
B) looking for brightness variations as it rotates.
C) determining its mass from its gravitational pull on a spacecraft, satellite, or planet.
D) radar mapping.
E) spectroscopic imaging.
C
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This sequence of paintings shows how a large gas cloud can collapse to become a much smaller, spinning disk of gas. What law explains why cloud spins faster as it shrinks in size?
A) the law of conservation of energy B) the universal law of gravitation C) the law of conservation of angular momentum D) Kepler's third law E) Newton's second law of motion
A ball is thrown at a 60.0° angle above the horizontal across level ground. It is thrown from a height of 2.00 m above the ground with a speed of 20.0 m/s and experiences no appreciable air resistance
The time the ball remains in the air before striking the ground is closest to A) 16.2 s. B) 3.07 s. C) 3.32 s. D) 3.53 s. E) 3.64 s.
According to the nebular theory of solar system formation, what key difference in their early formation explains why the jovian planets ended up so different from the terrestrial planets?
A) The terrestrial planets formed inside the frost line of the solar nebula and the jovian planets formed beyond it. B) The jovian planets formed in a region with a much higher density of hydrogen and helium gas. C) The terrestrial planets accreted from rock and metal, while the jovian planets were formed by giant balls of pure hydrogen and helium gas. D) The jovian planets began from planetesimals made only of ice, while the terrestrial planets began from planetesimals made only of rock and metal.
CP titanium alloys are primarily solid solution strengthened by the addition of the element _________.
Fill in the blank(s) with the appropriate word(s).