All events and all things exist in "the spacetime continuum" with coordinates
A) of distances in three dimensions.
B) of time.
C) both of these
D) none of these
Answer: C
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A wire (mass = 50 g, length = 40 cm) is suspended horizontally by two vertical wires which conduct a current I = 8.0 A, as shown in the figure. The magnetic field in the region is into the paper and has a magnitude of 60 mT. What is the tension in either wire?
A. 0.15 N B. 0.68 N C. 0.30 N D. 0.34 N E. 0.10 N
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Indicate whether the statement is true or false
Two radio antennas are 120 m apart on a north-south line. The two antennas radiate in phase at a frequency of 5.6 MHz. All radio measurements are made far from the antennas
What is the smallest angle, reckoned north of east from midway between the antennas, at which destructive interference of the two radio waves occurs? (c = 3.00 × 108 m/s) A) 13° B) 6.4° C) 9.7° D) 16° E) 19°