) A vertically oriented rocket that is able to sustain a continuous upward velocity of 8 km/s will
A) escape from Earth.
B) be unable to escape Earth.
C) eventually maintain a fixed orbit around Earth.
Answer: A
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Planetary orbits
A) are evenly spaced throughout the solar system. B) are highly inclined to the ecliptic. C) are almost circular, with low eccentricities. D) have the Sun at their exact center. E) are spaced more closely together as they get further from the Sun.
A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of -2.0 m/s. What is the velocity of the yellow ball after the collision?
A) zero B) +3.0 m/s C) -2.0 m/s D) +2.5 m/s E) +5.0 m/s
The five principles used to determine the relative ages of rock include original
A) horizontality, superposition, cross cutting, inclusion, and faunal succession. B) horizontality, nonconformity, cross cutting, inclusion, and faunal succession. C) inclusion, superposition, uniformitarianism, horizontality, and fossil succession. D) horizontality, uniformitariansism, cross cutting, stromatolite, and faunal succession.
Which of the following statements about Pluto is not true?
A) It has more in common with comets in the Kuiper belt than it does with the jovian planets. B) It is orbited by at least three moons. C) Its mass is less than 1% of Earth's mass. D) It is the largest known object that is considered to be a dwarf planet.