Which produces more force: driving into a very massive concrete wall with no "give," or having a head-on collision with an identical car moving toward you at the same speed?
A) car
B) wall
C) both the same
D) need more information
Answer: C
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Assuming that our ideas about how "hot Jupiters" ended up on their current orbits are correct, why didn't our own solar system end up with any hot Jupiters?
A) Our solar nebula must have been blown into space shortly after the formation of the jovian planets. B) Our jovian planets must have migrated outward from inside the orbit of Mercury. C) Our solar nebula must have stuck around for an unusually long time after the formation of jovian planets. D) The existence of Earth and the other terrestrial planets prevented the jovian planets from migrating inward.
If you blow up a balloon, and then release it, the balloon will fly away as the air rushes out. This is an illustration of
A) Newton's Second Law. B) Galileo's Law of Inertia. C) Newton's Third Law. D) Newton's First Law. E) Newton's Law of Universal Gravitation.
Optical interferometry is more in use than radio interferometry
Indicate whether the statement is true or false
An ideal Carnot engine operating between a warm reservoir of unknown temperature and a cold reservoir at has an efficiency of What is the temperature of the warm reservoir?
A) 1.98 K B) 0.180 K C) 157 K D) 0.160 K