Engineering Board Exam Reviewer · Physics · medium
What is the fundamental frequency of an open pipe (open at both ends) 0.5 m long? (speed of sound = 343 m/s)
- 171.5 Hz
- 686 Hz
- 343 Hz
- 1029 Hz
Answer
C. 343 Hz
Solution
f1 = v/(2L) = 343/1.0 = 343 Hz.
More Physics questions
- A stationary source emits 500 Hz. An observer moves toward the source at 20 m/s. What frequency is heard? (speed of sound = 343 m/s)
- An ambulance siren emits 500 Hz while approaching a stationary observer at 30 m/s. What frequency does the observer hear? (speed of sound…
- Thunder is heard 5 s after a lightning flash is seen. Approximately how far away was the lightning? (speed of sound = 343 m/s)
- A person hears an echo 3 s after shouting toward a cliff. If sound travels at 340 m/s, how far is the cliff?
- A wave has a period of 0.02 s. What is its frequency?
- A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is its speed?
- What is the orbital speed of a satellite in a circular orbit just above the Earth's surface? (g = 9.81 m/s2, R = 6371 km)
- What is the escape velocity from the Earth's surface? (g = 9.81 m/s2, R = 6371 km)
- What is the acceleration due to gravity at a height above the Earth's surface equal to the Earth's radius? (g at surface = 9.81 m/s2)
- If the distance between two masses is doubled, the gravitational force between them becomes: