An empty floating boat interacts gravitationally with the earth. A different interaction with something else keeps the boat from responding to the gravitational interaction by sinking. What is the other object that interacts with the boat?
A. The water
B. The atmosphere
C. The earth
D. The lake floor
E. Other (specify)
A. The water
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One of the features of "pseudoscience" that distinguishes it from "science" is that pseudoscientific ideas are
A) wrong. B) unusual, or odd. C) Both of the above. D) held dogmatically. E) held tentatively, as a hypothesis.
A car traveling at a steady 20 m/s rounds an 80-m radius horizontal unbanked curve with the tires on the verge of slipping
What is the maximum speed with which this car can round a second unbanked curve of radius 320 m if the coefficient of static friction between the car's tires and the road surface is the same in both cases? A) 160 m/s B) 80 m/s C) 70 m/s D) 40 m/s E) 30 m/s
The notation s?1 means the same thing as
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