Doppler Effect: Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone is moved between the speakers along the line joining the two speakers with a constant speed of 1.60 m/s. What beat frequency is observed? The speed of sound in air is 343 m/s.
A. 5.00 Hz
B. 6.00 Hz
C. 7.00 Hz
D. 8.00 Hz
E. 9.00 Hz
Answer: A
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A) nearly free atoms B) electrons C) nearly free electrons D) protons E) molecules
If a positively charged object is brought near a suspended, negatively charged object, the suspended object will be
a. repelled. b. charged more. c. discharged. d. attracted.
A current reading is obtained by properly placing an ammeter in a circuit consisting of one resistor and one battery. As a result,
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What is the momentum of an electron moving at a speed of 0.90 c?
A.
B.
C.
D.
E.