A stretched string is 1

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A stretched string is 1.95 m long and has a mass of 20.9 g. When the string oscillates at 440 Hz, which is the frequency of the standard A pitch, transverse waves with a wavelength of 15.7 cm travel along the string. Calculate the tension T in the string.

1.T= N

The clarinet is well?modeled as a cylindrical pipe that is open at one end and closed at the other. Find the wavelength and frequency of the third normal mode of vibration of a clarinet's air column with effective length of 0.385 m. Take 342 m/s for the speed of sound inside the instrument.

2.wavelength: m

3.frequency: Hz

The intensity of a certain sound at your eardrum is 00.0025 W/m2.Calculate the rate P at which sound energy hits your eardrum. Assume that the area of your eardrum is about 53 mm2.

4.P= W

What power output P0 is required from a point source that is 3.2 m away in order to create the same intensity at your eardrum?

5.P0= W

As you stand near a railroad track, a train passes by at a speed of 33.9 m/s while sounding its horn at a frequency of 213 Hz. What frequency do you hear as the train approaches you? What frequency do you hear while it recedes? Use 341 m/s for the speed of sound in air.

6.approaching: Hz

7.receding: Hz