What features are unique to Earth?
A. an atmosphere
B. precipitation
C. volcanoes
D. canyons
E. None of these features is unique to Earth.
Answer: E
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Can two pool balls, both of them moving, have a total momentum of zero?
A) No, because any moving object has momentum. B) No, because they both have energy. C) Yes, if they are moving in opposite directions, both with the same speed. D) Yes, but only at the instant that they collide. E) Yes, if they are both moving outward from the same point.
The SI base units for the spring constant are which of the following?
a. kg•s2 c. kg/s2 b. kg/m2 d. kg•m2
A sodium light (? = 589.3 nm) is used to view a soap film to make it look black when directed perpendicular to the film. What is the minimum thickness of the soap film if the index of refraction of soap solution is 1.38?
A) 114 nm B) 194 nm C) 294 nm D) 314 nm E) 214 nm
While Jupiter and Saturn may be mostly composed of liquid and gas, they each do have a thin crustal layer that acts like plastic
a. True b. False Indicate whether the statement is true or false