The Oort Cloud is thought to be:
A) the cloud of gas and dust from which our solar system formed.
B) a cloud of debris that occasionally encounters the Earth, causing a meteor shower.
C) the spherical cloud of comets and some larger icy bodies surrounding the outer solar system.
D) a cloud of asteroids moving between the orbits of Mars and Jupiter.
E) the material in the ecliptic plane that creates the zodiacal light.
C
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In the production of sediment from fresh rock, which usually occurs first, erosion or weathering?
What will be an ideal response?
The spins of all known particles are either integral or half-integral multiples of
a. the baryon number. b. Plank's constant. c. the Gravitational constant. d. the speed of light.
What produces the lunar phases?
a. The rotation of the Moon b. The revolution of the Moon c. The changing direction of sunlight d. Earth's tilted axis relative to the Moon e. The changing direction of Earth to the Moon
Escape Speed: The value of g at the surface of the spherical Asteroid X is 0.0060 m/s2 and the escape velocity is 10.1 m/s. What is the mass of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2)
A. 2.3 × 1016 kg B. 3.5 × 1012 kg C. 6.5 × 1015 kg D. 4.9 × 1014 kg E. 6.7 × 1013 kg