A 5.0-C charge is 10 m from a small test charge. What is the magnitude and direction of the electric field at the location of the test charge?
What will be an ideal response?
4.5 × 108 N/C, directed away from the 5.0 C
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Like our own, the magnetic field of Venus has been seen to reverse polarity
Indicate whether the statement is true or false
Velocity: A motorist makes a trip of 180 miles. For the first 90 miles she drives at a constant speed of 30 mph. At what constant speed must she drive the remaining distance if her average speed for the total trip is to be 40 mph?
A. 45 mph B. 50 mph C. 52.5 mph D. 55 mph E. 60 mph
A constant force is acting on an object. Which of these graphs best represents the velocity of the object?
A. 
B. 
C. 
The first evidence for electromagnetic waves came from
A) Marconi's experiment in which sound waves were sent from a vibrating membrane in one city and received by a similar device in another city. B) Heinrich Hertz's experiments in which electrons jumped back and forth across a gap in an electric circuit and EM waves were detected at some distance from the gap. C) Marconi's experiment in which radio waves were sent from a piece of vibrating crystal in one city and received by a similar device in another city. D) Heinrich Hertz's experiments in which electric charge was placed on small wooden rod and set into rapid vibration; EM waves were detected by a second wooden rod at some distance from the first rod. E) Maxwell's experiments in which magnetic effects were demonstrated to result from the current in electrical circuits.