Stars X and Y both have the same apparent brightness, but star X is 10,000 times as luminous as star Y. How much farther away is star X than star Y?
A) Star X is 10 times as far away as star Y.
B) Star X is 100 times as far away as star Y.
C) Star X is 10,000 times as far away as star Y.
D) Star X is 10 times closer to us than star Y.
B) Star X is 100 times as far away as star Y.
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If the acceleration vector of an object is directed parallel to the velocity vector, then
A) the object is speeding up. B) the object is slowing down. C) the object is moving with a constant velocity. D) the object is turning. E) the object is at rest.
As a dry cell ages, its internal resistance goes up
Indicate whether the statement is true or false
RMS and Peak Quantities: A 10-? resistor is connected to a 120-V ac power supply. What is the peak current through the resistor?
A. 12 A B. 17 A C. 0.083 A D. 0.12 A
Copernicus was able to calculate the distances to the observed planets relative to Earth's distance from the Sun.
Answer the following statement true (T) or false (F)