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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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
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.
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