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Physics 1135 End of Material || with Errorless Solutions 100%.
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a wave on a string has a fundamental frequency of 400 Hz. if you press your finger down on the string, shortening its length to 4/5 of the old length, the frequency will be A) 500 Hz B) 480 Hz C) 400 Hz D) 320 Hz correct answers A a violin string of mass m and length L has a frequency of f...

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  • September 26, 2024
  • 4
  • 2024/2025
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Physics 1135 End of Material || with Errorless Solutions
100%.
a wave on a string has a fundamental frequency of 400 Hz. if you press your finger down on the
string, shortening its length to 4/5 of the old length, the frequency will be

A) 500 Hz
B) 480 Hz
C) 400 Hz
D) 320 Hz correct answers A

a violin string of mass m and length L has a frequency of f. What is the fundamental frequency
of a string with mass 2m and length 2L that is under the same tension.

A) sqrt f
B) f
C) 1/2 f
D) 1/4 f correct answers C

two speakers are 6m apart on opposite sides of a stereo system, facing outward to the room. they
are driven by the same oscillator to emit a sound wavelength of 2m. if the amplitude of each
individual wave is A at a point that is 8m directly from one speaker, what is the amplitude of the
combined wave at that point

A) 0
B) sqrt A
C) 2A
D) 4A correct answers C

two identical loudspeakers are fed the same signal which generates sound of wavelength λ . the
speakers are facing each other, separated by a distance of 4λ. at what minimum distance in front
of a speaker and on the line connecting them is the local sound intensity a minimum.

A) 7/4 λ
B) 5/4 λ
C) 3/4 λ
D) 1/4 λ correct answers D

two identical loudspeakers (S1 and S2) are fed the same signal which generate sound of
frequency f propagating at speed V. the speakers are positioned in line with a listener as shown.
the speakers are separated by a distance X and speaker S2 is a distance L from the listener. what
value of X results in a maximum sound intensity at the listener.

A) (2fV)/L
B) (fL) / V

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