The figure shows an LR circuit with a switch and a 240-volt battery. At the instant the switch is closed the current in the circuit and the potential difference between points a and b, Vab, are
a.
0 A, 0 V
b.
0 A, ?240 V
c.
0 A, +240 V
d.
0.024 A, 0 V
e.
0.024 A, +240 V
c
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Indicate whether the statement is true or false
A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string?
A) 1056 hertz B) 1059 hertz C) 1053 hertz D) 3168 hertz E) need more information
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Fill in the blank(s) with the appropriate word(s).
The center of our galaxy lies in the direction of (but far beyond) the stars in the constellation of
a. Ursa Minor. b. Ursa Major. c. Sagittarius. d. Orion. e. Monoceros.