Answer the following statement(s) true (T) or false (F)
1. Equation E18.4 
is also solved by a function f (s), where s = t + x/c.
2. One can in principle create a purely electric traveling electromagnetic wave in empty space 
1. TRUE
2. FALSE
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Two resistors of 5.0 and 9.0 ? are connected in parallel. A 4.0-? resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination
(a) What is the current through the 4.0-? resistor? (b) What is the current through the 5.0-? resistor? (c) What is the current through the 9.0-? resistor?
The magnetic field and the number of turns of a coil of wire are doubled, while its area is reduced by a factor of 2. Assuming that all the other parameters remain the same, what happens to the induced emf in that coil of wire?
A) It is doubled. B) It is reduced by a factor of 2. C) It is quadrupled. D) It is reduced by a factor of 4. E) It stays the same.
The Lewis symbol •X• would be characteristic of which group?
a. 2A b. 4A c. 6A d. 1A
A high tide is occurring at Charleston, South Carolina (45°W, 64°N). Which listed longitude is experiencing a low tide occurring?
a. 135°E b. 65°E c. 45°E d. 45°W e. 145°W