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# img209 - 77777 77777 47 A simple pendulum has a mass of...

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Unformatted text preview: 77777 77777 47. A simple pendulum has a mass of 0.25 kg and a. length of 1.0 m. It is displaced through an angle of 30° and released. After a time, the maximum angle of swing is only 10°. How much energy has been lost to friction? (1) 0.29 J (2) 0.11 J (3) 0.54 J (4) 0.68 J (5) 0.42 J 48. A simple pendulum has a mass of 0.25 kg and a lengh of 1.0 m. It is displaced through an angle of 20° and released. After a time, the maximum angle of swing is only 10°. How much energy has been lost to friction? (1) 0.11 J (2) 0.29 J (3) 0.54 J (4) 0.68 J (5) 0.42 J 49. A simple pendulum has a mass of 0.25 kg and a length of 1.0 m. It is displaced through an angle of 40° and released. After a time, the maximum angle of swing is only 10°. How much energy has been lost to friction? (1) 0.54 J (2) 0.11 J (3) 0.29 J (4) 0.68 J (5) 0.42 J 50. A simple pendulum has a mass of 0.25 kg and a length of 1.0 m. It is displaced through an angle of 45° and released. After a time, the maximum angle of swing is only 10°. How much energy has been lost to friction? (1) 0.68 J (2) 0.11 J (3) 0.54 J (4) 0.29 J (5) 0.42 J 51. Consider the curve f(1') = Acos(27r:1:/A). The wavelength of the A wave will be: I (1) twice the distance 2:2 to \$3. 0 x1 x2 x3 (2) the distance 0 to A. (3) twice the distance 0 to A. (4) the distance \$2 to 3:3. (5) the distance 0 to 2:1. 52. What sound level change corresponds to a factor of two change in intensity? (1) 3.0 dB (2) 4.8 dB (3) 7.0 dB (4) 8.5 dB (5) 1.4 dB 53. What sound level change corresponds to a factor of three change in intensity? (1) 4.8 dB (2) 3.0 dB (3) 7.0 dB (4) 8.5 dB (5) 1.4 dB 54. What sound level change corresponds to a factor of five change in intensity? (1) 7.0 dB (2) 4.8 dB (3) 3.0 dB n (4) 8.5 dB (5) 1.4 dB 55. You stand by the railroad tracks as a train passes by. You hear a 1000 Hz ﬁ‘equency when the train approaches, which changes to 800 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s. (1) 37.8 m/s (2) 17.9 m/s (3) 27.6 m/s (4) 8.7 m/s (5) 53.4 m/s 56. You stand by the railroad tracks as a train passes by. You hear a 1000 Hz frequency when the train approaches, which changes to 900 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s. (1) 17.9 m/s (2) 37.8 m/s (3) 27.6 m/s (4) 8.7 m/s (5) 53.4 m/s 197 ...
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