6. Two sound waves, from two different sources with the same frequency, 540 Hz, travel in the same direction at 330 m/s. The sources are in phase. What is the phase difference of the waves at a point that is 4.40 m from one source and 4.00 m from the other? Ans. 4.1 rad
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- 9. A car and a bicycle are traveling directly toward each other at different speeds. The car's horn has a stationary frequency of 440 Hz and the car is traveling at 15 m/s. The cyclist hears the sound from the car of 467 Hz frequency. The speed of sound in the air is 343 m/s. Calculate the speed of the bicycle. A. 5 m/s B. 6 m/s C. 7 m/s D. 8 m/s E. 9 m/s1 What frequency of sound traveling in air at 37◦ C has a wavelength of 0.6 m? Calculate to one decimal.3. A string fixed at both ends is 8.40 m long and has a mass of 0.120 kg. It is subjected to a tension of 96.0 N and set oscillating. (a) What is the speed of the waves on the string? (b) What is the longest possible wavelength of a wave to create a standing wave pattern? (c) Give the frequency of that wave. Ans. 81.98 m/s; 16.8 m; 4.88 Hz
- IXODF The diagram is a "snapshot" of a wave. The frequency of the wave is 110 Hz. Each division in the graph is 1 cm. Find the indicated quantities. AA x (cm) A D. 5.494 cm 7.302 cm E. 4.221_cm 5.499 cm 5.006_cm 6.279 cm F. A. 14.19 cm 18.55 cm 17.39 cm B. 12.48 cm C. 12.63 cm F. 10.1 cm 1--1 7. speed A. 1389 cm/s D. B. 2430 cm/s E. 1710 cm/s 1787 cm/s 2503_cm/s C. 2170 cm/s F. If the linear mass density of a cord is 0.042 kg/m, then what is the mass of 245 m of the cord? 8. A. 9.855 kg D. 9.433 kg B. 9.914 kg E. 10.07 kg C. 10.29 kg F. 10.80 kg 1-1 5. amplitude A. B. C. 1--1 6. wavelength ook Pro DEE D. E. IVVVSTwo progressive waves yı = A sin( 4 x wt) and y2 = A sin( 2"x – ot – 5 ) travel in the same direction. X. X - Calculate the amplitude Afot of the wave y = y1 + y2 produced as a result of interference of these two waves. Take A = 7.1 cm, å = 4 m and w = :10z Hz. Give your answer in centimetres (cm).QUESTION 40 Which of these expressions yields the speed of sound in air in SI units if the air temperature is 114 degrees Celsius? a. 331.5 + 0.607 + 114 b. 331.5 + 0.607 times 114
- 2. Transverse waves are sent along a 5.00-m long string with a speed of 30.0 m/s. The string is under a tension of 10.00 N. What is the mass of the string?58. Two waves , each with the wave lenght of 2.0 m , meet with a phase of 360o. What is the amplitude of the resultant wave if the first wave has an amplitude of 5.0 cm and the second wave has an amplitude of 4.0 cm ? a) 5.0 cm b) 9.0 cm c) 4.0 cm d) 1.0 cm9. An aircraft is moving away from you at half the speed of sound, which, on that day is about 340 m/s. The jet engines make a sound that is primarily about 300 Hz. What is the apparent frequency of the jet engines? A. 150 Hz C. 470 Hz senver B. 200 Hz D. 600 Hz a station of
- The speed of sound in air is 330 m s-¹ 1. A motorcyclist travelling at a speed of 29 m s-¹ sounds the horn on their motorbike while passing a pedestrian beside the road. The rider hears the horn as a sound of frequency 250 Hz. a. What frequency does the pedestrian hear: i. when the motorcycle approaches? ii. when the motorcycle moves away? b. Explain why, when the motorcycle is right in front, the pedestrian hears the same frequency as the rider. DQUESTION 6 A tranverse wave in a medium wave is described by the following equation: y(x,t) = (12 m)cos(3.0x - 120t). What is the speed of this wave? (x and y describe real space with units of meters, and t is time in seconds.) а. 60 m/s b. 70 m/s С. 50 m/s d. 30 m/s e. 40 m/s3. Examine the following wave. It takes the wave 5.0s to move the 3.5m from X to Y. wave motion a) b) c) d) àX Find the amplitude of the wave. Find the period of the wave. Find the frequency of the source. Find the wavelength of the wave. Find the speed of the wave. 1.5m Y