How large is an impact crater compared to the size of the impactor?
A) the same size
B) 10-20 percent larger
C) 10 times larger
D) 100 times larger
E) 1,000 times larger
C
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A string is stretched with a tension of 120 N. The string has a length of 2.5 meters. The velocity of wave propagation along the string is 220 m/s. The mass per unit length of the string is
a. 
b. 
c. 
d. 
e. 
What condition or conditions is/are necessary for static equilibrium?
A) ?Fy = 0 B) ?Fx = 0, ?Fy = 0 C) ?? = 0 D) ?Fx = 0 E) ?Fx = 0, ?Fy = 0, ?? = 0
A popular end for many cartoon characters is to fall into a "bottomless pit" in which the unfortunate character will fall forever. Consider the space shuttle in orbit around the Earth
Argue that there is a strong analogy between the cartoon "bottomless pit" and the orbital motion of the shuttle.
The largest share of renewable energy in the U.S. comes from
a. wind b. natural gas c. hydro d. petroleum e. radiant solar