A 0.10g flea, having lept from the surface of a dog’s cranium, is observed to be moving at 1.25m/s when it is 5.00cm above the position from which it leapt. What was the elastic potential energy stored in its legs before its leap?
a. 
b. 
c. 
d. 
e. 
f. 
f.
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A thin rod is pivoted around its end, and an identical rod around its center. If they are to have the same rotational kinetic energy, then 
A. 2 B. 1 C. 1/2 D. 1/4 E. 4
The ________ is the spherical outer portion of the Galaxy, including the orbits of the globular clusters and most dark matter
Fill in the blank(s) with correct word
A common opinion concerning the creationism versus evolution controversy is the idea that Earth was created fairly recently but that it was created with fossils and other evidence of great age already present, so that Earth has the appearance of
being very old even though it is really quite young. This opinion is best classified as A) a scientific hypothesis for which there is currently insufficient evidence. B) a scientific opinion that is probably incorrect. C) nonscientific because it contradicts common sense. D) nonscientific because there is no conceivable scientific way to disprove it. E) a scientific opinion that is certainly incorrect.
Define an elastic collision in terms of conservation of momentum and energy
What will be an ideal response?