PHYSICS HOMEWORK WS – 2 STANDING WAVES
NAME: ______
PERIOD: ______
1. A piano emits frequencies that range from a low of about 28 Hz to a high of about 4200 Hz. Find the range of wavelengths in air attained by this instrument when the speed of sound in air is 340 m/s.
LOW END OF RANGE HIGH END OF RANGE
G: ______
______
U: ______
E: ______
S: ______
S: ______
2. A tuning fork produces a sound with a frequency of 256 Hz and a wavelength in air of 1.35 m.
A. What value does this give for the speed of sound in air?
G: ______
______
U: ______
E: ______
S: ______
S: ______
B. What would be the wavelength of this same sound in water in which sound travels at 1500 m/s?
G: ______
______
U: ______
E: ______
S: ______
S: ______
3. On the diagram below:
A. Label the nodes and antinodes.
B. What is its wavelength if the distance between nodes is 2 m? ______
C. If the person is shaking her hand up-and-down 12 times per second, what is the wave velocity? (Show Work)
4. What is the fundamental frequency of a guitar string when the speed of waves on the string is 115 m/s and the effective string length is 0.70 m?
G: ______
______
U: ______
E: ______
S: ______
S: ______
5. What is the frequency of the 3rd harmonic of the same guitar string in #4? ______
6. A violin string that is 0.50 m long has a fundamental frequency of 440 Hz. What is the speed of the waves on this string?
G: ______
______
U: ______
E: ______
S: ______
S: ______
7. What is the frequency of the 2nd harmonic of the same violin string in #6? ______