Two loudspeakers placed 6.00 m apart are driven in phase by an audio oscillator having a frequency range from 1908 Hz to 2471 Hz
A point P is located 4.70 m from one loudspeaker and 3.60 m from the other speaker. At what frequency of the oscillator does the sound reaching point P interfere constructively? The speed of sound is 344 m/s.
A) 2420 Hz B) 2110 Hz C) 2190 Hz D) 2340 Hz E) 2270 Hz
C
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A) days. B) months. C) year. D) decades.
A magnifying lens with a focal length of 30 cm has what magnification when the viewing eye is relaxed?
a. 7.14 b. 0.8 c. 1.3 d. 1.8 e. –0.2
Suppose that the maximum rate of change of current in a "high power" transmission line is 104 A/s. How large a coil (area) placed 10. meters from the line would have 120. volts (max) induced in it?
A) 6. × 103 m2 B) 2. × 105 m2 C) 6. × 105 m2 D) 2. × 103 m2 E) 6. × 104 m2
A particle (charge 7.5 ?C) is released from rest at a point on the x axis, x = 10 cm. It begins to move due to the presence of a 2.0-?C charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passes the point x = 1.0 m?
a. 3.0 J b. 1.8 J c. 2.4 J d. 1.2 J e. 1.4 J