SSM In Fig. 17-41, S is a small loudspeaker driven by an audio oscillator with a frequency that is varied from 1000 Hz to 2000 Hz, and D is a cylindrical pipe with two open ends and a length of 45.7 cm. The speed of sound in the air-filled pipe is 344 m/s. (a) At how many frequencies docs the sound from the loudspeaker set up resonance in the pipe? What are the (b) lowest and (c) second lowest frequencies at which resonance occurs? Figure 17-41 Problem 43.
SSM In Fig. 17-41, S is a small loudspeaker driven by an audio oscillator with a frequency that is varied from 1000 Hz to 2000 Hz, and D is a cylindrical pipe with two open ends and a length of 45.7 cm. The speed of sound in the air-filled pipe is 344 m/s. (a) At how many frequencies docs the sound from the loudspeaker set up resonance in the pipe? What are the (b) lowest and (c) second lowest frequencies at which resonance occurs? Figure 17-41 Problem 43.
SSM In Fig. 17-41, S is a small loudspeaker driven by an audio oscillator with a frequency that is varied from 1000 Hz to 2000 Hz, and D is a cylindrical pipe with two open ends and a length of 45.7 cm. The speed of sound in the air-filled pipe is 344 m/s. (a) At how many frequencies docs the sound from the loudspeaker set up resonance in the pipe? What are the (b) lowest and (c) second lowest frequencies at which resonance occurs?
61
In Fig. 17-37, S is a small loudspeaker driven
by an audio oscillator with a frequency that is var-
ied from 1000 Hz to 2000 Hz, and D is a cylindrical
pipe with two open ends and a length of 48.9 cm.
The speed of sound in the air-filled pipe is 344 m/s.
(a) At how many frequencies does the sound from
the loudspeaker set up resonance in the pipe?
What are the (b) lowest and (c) second lowest fre-
quencies at which resonance occurs?
S
D
Figure 17-37
Problem 61.
A sound wave in air at 20°C has a frequency of 320 Hz anda displacement amplitude of 5.00 * 10-3 mm. For this sound wavecalculate the (a) pressure amplitude (in Pa); (b) intensity (in W/m2);(c) sound intensity level (in decibels).
Sound is detected when a sound wave causes the tympanic membrane (the ear drum) to vibrate. Typically, the diameter of this membrane is about 8.4 mm in humans. A) how much energy is delivered to the eardrum each second when someone whispers (20 dB) into your ear? B) to comprehend how sensitive the ear is to very small amounts of energy, calculate how fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have this amount of kinetic energy.
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
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