When Monkey Mo is suspended at rest by holding a rope with one hand and the side of his cage with the other, all the force vectors that act on him
A) have equal magnitudes.
B) cancel except for his weight vector, mg.
C) have a vector sum of zero.
Answer: C
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How can we measure the strength of magnetic fields on the Sun?
A) by looking for the splitting of spectral lines in the Sun's spectrum B) by observing the sizes of sunspots: Bigger sunspots mean a stronger field C) by observing auroras here on Earth D) only by using sophisticated computer models, because there are no observational ways of measuring magnetic field strength
What is the main visual difference between the lunar maria and the rest of the lunar surface? What are the implications of this observation?
What will be an ideal response?
When a perched water table intersects the surface on a hillside, the result is
A) an artesian well. B) a spring. C) a lake. D) a cone of depression.
You ride in an automobile traveling at 100 km/h. It comes to a stop over 0.5 seconds. You can be sure that
a. the car's engine has stopped. b. a velocity acts. c. friction between the tires and the road stopped it. d. the car had a nonzero acceleration during that time. e. none of the other answers is correct.