The "zodiac" is ________.
A. a pink-colored glow above the horizon due to scattered sunlight
B. a series of astrological signs
C. a band of stars falling along the Celestial Equator
D. a belt-shaped region of the sky surrounding the ecliptic
E. a group of constellations through which the Sun passes on the equinoxes
Answer: D
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Faraday's Law: A round flat metal coil has 180 turns and negligible resistance. It is connected in a series circuit with a 17-? resistor, with nothing else in the circuit. You measure that a 6.0-A current flows through the resistor when a magnetic field through the coil, perpendicular to its area, is changing at 3.0 T/s. What is the radius of the coil?
A. 0.25 m B. 0.014 m C. 0.54 m D. 0.043 m
Why doesn't a brown dwarf become a star?
A) It does not have enough mass for its core to get hot enough to start fusion reactions before degeneracy pressure prevents further collapse. B) It always has a companion star that is hotter, and therefore, the brown dwarf is more like a planet than a star. C) It does not have enough heavy elements to start fusion reactions. D) Its luminosity is not high enough to qualify as an official star.
Which of these is stated properly?
a. "The temperature of liquid nitrogen is 77 Kelvin.". b. "The temperature of liquid nitrogen is 77 Kelvins.". c. "The temperature of liquid nitrogen is 77 degrees Kelvin.". d. "The temperature of liquid nitrogen is 77 Kelvin degrees.".
Small glaciers that form along mountains in hollow depressions that are protected from the Sun are called
a. cirque glaciers. b. moraines glaciers. c. permanent glaciers. d. none of these.