Parallax is the apparent change in location of an object due to the motion of the observer
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following comprise the oldest members of the Milky Way?
A) the Sun and other solar mass stars B) O stars C) red giant stars in spiral arms D) Cepheid variables E) globular clusters
Series/Parallel Circuits: A resistor is made out of a wire having a length L. When the ends of the wire are attached across the terminals of an ideal battery having a constant voltage V0 across its terminals, a current I flows through the wire. If the wire were cut in half, making two wires of length L/2, and both wires were attached across the terminals of the battery (the right ends of both wires attached to one terminal, and the left ends attached to the other terminal), how much current would the battery put out?
A. 4I B. 2I C. I D. I/2 E. I/4
A mineral's physical properties are dependent on _______.
What will be an ideal response?
As a radio source, the period of "pulsar Earth" is
A) 30 minutes. B) 23 hours, 56 minutes. C) 24 hours. D) 29.5 days. E) 365.25 days.