Standing Sound Waves: A standing wave of the third overtone is induced in a 1.2-m pipe that is open at one end and closed at the other end. The speed of sound in the pipe is 340 m/s. (a) How many antinodes are there in the standing wave pattern?(b) What is the frequency of the sound produced by the pipe in this situation?
Fill in the blank(s) with the appropriate word(s).
(a) 4 (b) 500 Hz
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Velocity Selector: A beam of electrons is accelerated through a potential difference of 1.0 kV before entering a velocity selector. If the magnetic field of the velocity selector has a magnitude of 0.010 T, what magnitude of the electric field is required if the electrons are not to be deflected as they pass through the velocity selector? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg)
A. 5.9 × 103 V/m B. 1.9 × 105 V/m C. 6.0 × 105 V/m D. 7.2 × 106 V/m E. 1.1 × 105 V/m
Which of the following represents the equipotential lines of a dipole?
A.
B.
C.
D.
E.
Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John jumps
A) 0.50 times as long. B) 1.41 times as long. C) twice as long. D) three times as long. E) four times as long.
Which of the following is NOT a Mars rover?
A) Spirit B) Sojourner C) Curiosity D) Viking