When a car is struck by lightning, the resulting electric field inside the car is
A) normally huge, but for a brief time.
B) small enough to be safe for a passenger inside.
C) zero.
Answer: C
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In optics, what is meant by an "interface?"
a. optically connecting one computer to another b. using the image created by one lens as the object for another lens c. when the crest of one wave lines up with the trough of another wave d. none of the above
In gaseous form at the same temperature, the average speed of U-238 compared to the speed of U-235 is
A) less. B) more. C) the same.
A power line carries 1000 A at a height of 20 m above the ground. What is the resulting magnetic field at ground level?
A. 50 mT
B. 0.13 mT
C. 13 
T
D. 10 
T
E. 5.0T
How large a pressure increase (in atm) must be applied to water if it is to be compressed in volume by 1.0%? The bulk modulus of water is 2.0 × 109 N/m2 and 1 atm = 1.0 × 105 N/m2.
A. 50 atm B. 100 atm C. 1 100 atm D. 400 atm E. 200 atm