Dust is an important part of the nebular theory of solar system formation because dust is needed to explain:
A) how the inner planets came to be rocky bodies.
B) how the outer planets came to be gaseous bodies.
C) how the initial cloud cooled enough to collapse.
D) how the initial cloud heated as it contracted.
E) why the icy bodies are located so far from the Sun.
A
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The Milky Way Galaxy is a part of a galaxy cluster known as _____
A) the Virgo Cluster B) the Local Group C) the M 81 Group D) the Bullet Cluster
Lithium has less binding energy than _____________, thus the neutrons and protons are easier to unbind from the nucleus
a. helium b. nitrogen c. carbon d. all of the other choices
Which of these are SI units?
a. centimeters b. newtons c. pounds d. seconds e. none of the above
Two horizontal curves on a bobsled run are banked at the same angle, but one has twice the radius of the other. The safe speed (for which no friction is needed to stay on the run) for the smaller radius curve is v
What is the safe speed on the larger-radius curve? A) v / B) 2v C) v D) v/2