Which of the following types of protogalactic clouds is most likely to form an elliptical galaxy?
A) a low-density cloud with quite a bit of angular momentum
B) a dense cloud with quite a bit of angular momentum
C) a very low-density cloud with very little angular momentum
D) a very massive cloud with any density and a lot of angular momentum
E) a dense cloud with very little angular momentum
E
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The kinetic coefficient of friction is usually larger than the static coefficient of friction
Indicate whether the statement is true or false
A 4.00-kg block slides down a frictionless inclined plane with an acceleration 3.00 m/s2. What is the angle of the incline above horizontal?
A) 35.3° B) 45.2° C) 17.8° D) 23.6° E) 53.7°
A region of ionized gas and dust, with imbedded hot young stars, is a(n)
A) emission nebula. B) dust cloud. C) dark nebula. D) nebular hole. E) absorption nebula.
The study of planet Earth is known as
a. mineralogy. b. petrology. c. geology. d. paleontology.