Mr. Trottier creates standing waves on a 0.9m-long jump rope. If he is able to produce a pattern with 3 antinodes, what is the wavelength of these standing waves? Include a drawing Fill in the blanks on the following table, comparing intensity and sound level. Intensity (W/m2) Sound Level (dB) 1.0 x 10 - 12 0 dB 1.0 x 10 - 8 1.0 x 10 - 7 120 dB B.A sparrow flies through the air at 28 mph. If the speed of sound in air is 336 m/s, what is the Mach Number of the sparrowb. wo tuning forks are played at the same time, and produce beats with a frequency of 3 Hz. If one of the tuning forks is at 390 Hz, what are the possible frequencies of the other tuning fork? What are the frequency and period of the hour hand of a clock?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Mr. Trottier creates standing waves on a 0.9m-long jump rope. If he is able to produce a pattern with 3 antinodes, what is the wavelength of these standing waves? Include a drawing
- Fill in the blanks on the following table, comparing intensity and sound level.
|
Intensity (W/m2) |
Sound Level (dB) |
|
1.0 x 10 - 12 |
0 dB |
|
1.0 x 10 - 8 |
|
|
1.0 x 10 - 7 |
|
|
120 dB |
B.A sparrow flies through the air at 28 mph. If the speed of sound in air is 336 m/s, what is the Mach Number of the sparrowb.- wo tuning forks are played at the same time, and produce beats with a frequency of 3 Hz. If one of the tuning forks is at 390 Hz, what are the possible frequencies of the other tuning fork?
- What are the frequency and period of the hour hand of a clock?
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