You have a stopped pipe of adjustable length close to a taut 62.0 cm, 7.25 g wire under a tension of 4510 N. You want to adjust the length of the pipe so that, when it produces sound at its fundamental frequency, this sound causes the wire to vibrate in its second overtone with very large amplitude. The speed of sound in air is 344 m/s. Part A How long should the pipe be? Express your answer with the appropriate units. L = Submit μA Value Provide Feedback Request Answer Units ?
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- One end of each of two identical strings is attached to a wall. Each string is being pulled equally tight by someone at the other end. A transverse pulse is sent traveling along string A. A bit later an identical pulse is sent traveling along string B. What, if anything, can be done to make the pulse on string B catch up with and pass the pulse on string A? O Pull harder on string A. O Pull harder on string B. O Nothing can be done.A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.500 m and a mass of 3.75 g Part A What is the frequency f1 of the string's fundamental mode of vibration? Part B What is the number n of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to f = 16 kHz?During takeoff, the sound intensity level of a jet engine is 150 dB at a distance of 32 m. Part A What is the sound intensity level at a distance of 1.0 km? Express your answer with the appropriate units.
- An osprey's call is a distinct whistle at 2200 Hz. An osprey calls while diving at you to drive you away from its nest. You hear the call at 2300 Hz. Part A How fast is the osprey approaching? Express your answer with the appropriate units. v= μA Value Units ?Some caterpillars, when under attack by birds, emit high-pitched whistles by sharply forcing air through openings in their thorax. (Eigure 1) is an experimental graph of intensity versus frequency for a caterpillar whistle. Assume a sound speed of 340 m/s. Figure Intensity 0 10 20 30 40 50 < 1 of 1 -f(kHz) Correct Part B What is the length of the tube? Express your answer with the appropriate units. L- 0.0189 Submit m Previous Answers Request Answer ? X Incorrect; Try Again; 4 attempts remainingA train whistle is heard at 250 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 240 Hz. Part A What is the speed of the train before slowing down? Express your answer to two significant figures and include the appropriate units. V1 = Part B Value v2 = What is the speed of the train after slowing down? Express your answer to two significant figures and include the appropriate units. LO μA Units Value ? Units ?
- Part A Two steel guitar strings have the same length. String A has a diameter of 0.60 mm and is under 430.0 N of tension. String B has a diameter of 1.5 mm and is under a tension of 850.0 N . You may want to review (Pages 461 - 463) . Find the ratio of the wave speeds, vA/VB, in these two strings. Express your answer using two significant figures. Hνα ΑΣφ VA/VB = Submit Request AnswerItem 11 Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000 × 10¹4 Hz. Part A If the galaxy is receding from Earth with a speed of 4125 km/s, what is the frequency of the light when it reaches Earth? Express your answer to four significant figures and include appropriate units. μA Value Submit Units Request Answer ?An ethernet cable is 3.90 m long and has a mass of 0.210 kg. A transverse pulse is produced by plucking one end of the taut cable. The pulse makes four trips down and back along the cable in 0.810 s. What is the tension in the cable?N
- A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.600 m and a mass of 4.50 g. Part A What is the frequency of the string's fundamental mode of vibration? Express your answer numerically in hertz using three significant figures. ΕΞΙ ΑΣΦ Submit Part B Request Answer 71= 2 What is the number n of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to f-16 kHz? Express your answer exactly. 197) ΑΣΦ 4 Ha ?Part A Two steel guitar strings A and B have the same length and are under the same tension. String A has a diameter of 0.65 mm and string B has a diameter 1.17 mm. Treat the stretched-out strings as right cylinders with length L and radius r having volume n L. You may assume that both strings are made of the same material, so they have the same density. The ratio of the wave speeds, VA/VB, in the two strings is (enter your answer with two significant figures) possibly useful: density = mass/volume v = Af string fixed at both ends: An = 2L/n ; n = 1, 2, 3, 4, 5... %3D V = squareroot[F/µ) H = mass per unit length 1.8 Sumit Previous Answers Correct Part B The ratio of the eleventh harmonic frequency of string A to the eleventh harmonic frequency of string B, (111)A/(f11)B, is (enter your answer with two significant figures) 1.8 Bubm Previous Answers CorrectThe ability to hear a "pin drop" is the sign of sensitive hearing. Suppose a 0.53 g pin is dropped from a height of 31 cm, and that the pin emits sound for 1.4 s when it lands. Part A Assuming all of the mechanical energy of the pin is converted to sound energy, and that the sound radiates uniformly in all directions, find the maximum distance from which a person can hear the pin drop. (This is the ideal maximum distance, but atmospheric absorption and other factors will make the actual maximum distance considerably smaller.) Express your answer using two significant figures. Hνα ΑΣφ ? r = km