The source of energy that illuminates a lamp in your home is
A) the power company.
B) the electrical outlet.
C) atoms in the bulb filament.
D) the wire leads to the lamp.
E) the source voltage.
Answer: A
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Astronomers refer to the beginning of the Universe as the _______________
Fill in the blank(s) with correct word
The Local Group
A. is a supercluster. B. has the Milky Way as its center. C. contains about 30 member galaxies. D. is the small cluster to which the Milky Way belongs. E. None of these choices is correct.
The observable universe is the same size today as it was a few billion years ago
Indicate whether the statement is true or false
A juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point:
a. Their velocities and accelerations are equal. b. Their velocities are equal but their accelerations are equal and opposite. c. Their accelerations are equal but their velocities are equal and opposite. d. Their velocities and accelerations are both equal and opposite. e. Their velocities are equal to their accelerations.