The normal tendency of positive charges is to
A. move to regions of higher electric potential
B. move to regions of lower electric potential
C. remain stationary in an electric field
D. move perpendicularly to electric field lines.
B. move to regions of lower electric potential
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The average force required to accelerate a 0.20-kg ball from rest to 30 m/s in 0.002 s is
A. 15,000 N. B. 3,000 N. C. 0.003 N D. 75,000 N.
Planets with larger orbital radii have longer orbital periods because they both have a longer distance to travel in each orbit and move more slowly
Indicate whether the statement is true or false
To be dimensionally consistent, pressure 
density 
and velocity [L/T] must be related as follows.
A. 
B. 
C. 
D. 
In contrast to the outer solid mantle, parts of the central regions of Earth's interior are thought to be fluid because
a. P seismic waves cannot make it through those regions b. S seismic waves cannot make it through those regions c. both P and S seismic waves cannot make it through those regions d. both P and S seismic waves easily make it through those regions