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PHYWE Velocity of Sound |
Learn about:
- Linear relationship between the propagation time of sound and its respective path
- Longitudinal waves
- Velocity of sound
With this highly precise kit students can learn about the linear relationship between the propagation time of sound and its respective path. The speed of sound can then be easily calculated. A pulse of sound is generated by striking two metal rods against each other. By doing so, an electrical contact is simultaneously closed; this starts Timer 1. After the sound has travelled the distance s, the pulse of sound is registered by the microphone; in this manner, Timer 1 is stopped. One obtains the sound travel time t or also immediately the speed of sound v = s / t if the path distance has been previously entered. Ensure that the sound pulse is generated at approximately the same height in which the microphone is located in order to ensure that the horizontal distance between the sound source and the microphone is in reality the distance that the sound pulse must travel. The distance s is the distance from the front side of the microphone capsule to the side of the clamped-in metal rod facing the microphone. Tap the free metal rod on the side of the clamped-in rod that faces away from the microphone. Subsequently, the measured speed of can be read off and the timer is stopped.
Occasionally, the timer immediately restarts after termination of the measurement because additional start pulses were sent to Timer 1 as a result of the metal rod’s rebounding after having been struck. In this case, terminate the measurement process with a noise and then perform another measurement.
Includes Cobra3 Basic Unit, power supply, 12 V, RS232 data cable, Cobra3 Timer/Counter Software, microphone with amplifier, battery, 9 V, two support rods, 2 m measuring tape, four connecting cords, and user manual on CD-ROM.
System requirements:
PC, Windows® 95 or higher
For your convenience this experiment is available to you as a complete set.
Everything you require to perform the activities are included in the total price.
For assistance in using your new equipment we also offer professional development (WLS1808-24) on all PHYWE line products.
For customization options and pricing please contact your local Cenco representative.
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