The bright object in this photo is a quasar (named 3C 273). According to current understanding, about how big is the source of the bright light?
A) about the size of our solar system
B) about a million light-years across
C) about the size of the central bulge of the Milky Way Galaxy (that is, about 10,000 light-years across)
D) about 500 light-years across
A) about the size of our solar system
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Isobaric work is
A) V ?p. B) p ?T. C) p ?V. D) Q - W. E) Q + W.
A car needs to generate 75.0 hp in order to maintain a constant velocity of 27.3 m/s on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N
The North Celestial Pole is 35 ? above your northern horizon. This tells you that:
a. you are at latitude 35 ? N. b. you are at longitude 35 ? E. c. you are at latitude 35 ? S.
Isaac Newton guessed that gravity works by an inverse square relation because he had already discovered that light behaves this way
Indicate whether the statement is true or false