A pipe that is 120 cm long resonates to produce sound of wavelengths 480 cm, 160 cm, and 96 cm but does not resonate at any wavelengths longer than these. This pipe is
A) open at both ends.
B) open at one end and closed at the other end.
C) closed at both ends.
D) We cannot tell because we do not know the frequency of the sound.
Answer: B
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Phase Angles: The figure shows a series ac circuit. The inductor has a reactance of 60 ? and an inductance of 210 mH. A 30-? resistor and a capacitor whose reactance is 80 ? are also in the circuit, and the rms current in the circuit is 2.2 A. What is the phase angle of the circuit?
A. -34° B. 34° C. +90° D. -56° E. 56°
The product of the wavelength times the frequency of a wave is its ________
Fill in the blank(s) with correct word
When viewing your image in a hand-held mirror, if you move the mirror away at a speed v, the image appears to:
a. also move away at v. c. move away at 2v. b. move away at v/2. d. not move.
Explain Occam's Razor
What will be an ideal response?