The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy
a. I
b. IV
c. I & IV
d. II & IV
e. I & III
e
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A large gas cloud in the interstellar medium that contains several type O and B stars would appear to us as:
A) a dark nebula. B) an emission nebula. C) bright blue. D) a reflection nebula. E) a dark patch against a bright background.
Sun is considered to be a
A) low-mass star. B) intermediate-mass star. C) high-mass star. D) brown dwarf.
Two identical cars are traveling around the same curve on a highway. One of them is moving at 60 mph, and the other is moving at 30 mph. The centripetal force acting on the car moving at 60 mph is __________ the value of the centripetal force acting on the car moving at 30 mph
a. one quarter b. one half c. the same as d. twice e. four times
An ideal gas with ? = 1.67 is initially at 0°C in a volume of 10.0 liters at a pressure of 1.00 atm. It is expanded adiabatically to a volume of 10.4 liters. What then is the temperature?
A) -7.10°C B) 2.53°C C) -22.7°C D) 67.8°C E) -19.5°C