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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 13 | When car shock absorbers wear out and lose their damping ability, what is the resulting oscillating behavior? 1) underdamped 2) critically damped 3) overdamped 4) hyperdamped | underdamped | |
| 13 | Which is not an example of approximate simple harmonic motion? 1) A ball bouncing on the floor. 2) A child swinging on a swing. 3) A piano string that has been struck. 4) A car's radio antenna as it waves back and forth. 5) Both choices A and D are valid. | A ball bouncing on the floor. | |
| 13 | Which of the following is an example of a longitudinal wave? 1) sound wave in air 2) wave traveling in a string 3) both a and b 4) neither a nor b 5) wave traveling in a rope | sound wave in air | |
| 13 | Which one of the following quantities is at a maximum when an object in simple harmonic motion is at its maximum displacement? 1) speed 2) acceleration 3) kinetic energy 4) frequency 5) both choices A and C are valid. | acceleration | |
| 14 | A 1.5-m string is held fixed at both ends. When driven by a 180-Hz source, the string vibrates in 4 distinct segments. What is the natural fundamental frequency of the string? | 45 Hz | |
| 14 | A 100-m-long high-voltage cable is suspended between two towers. The mass of the 100-m cable is 150 kg. If the tension in the cable is 30 000 N, what is the lowest frequency at which this cable can oscillate? | 0.71 Hz | |
| 14 | A 2.50-m-long organ pipe is open at one end and closed at the other. Its fundamental tone has wavelength: | 10.0 m. | |
| 14 | A 500-Hz whistle is moved toward a listener at a speed of 10.0 m/s. At the same time, the listener moves at a speed of 20.0 m/s in a direction away from the whistle. What is the apparent frequency heard by the listener? (The speed of sound is 340 m/s.) | 485 Hz | |
| 14 | A bat, flying at 5.00 m/s toward a wall, emits a chirp at 50.0 kHz. If the wall reflects this sound pulse, what is the frequency of the echo received by the bat? (vsound = 340 m/s) | 51.5 kHz | |
| 14 | A C note (f = 256 Hz) is sounded on a piano. If the length of the piano wire is 1.00 m and its mass density is 2.50 g/m, what is the tension in the wire? | 655 N | |
| 14 | A child sits on a swing supported by ropes of length 3.0 m. With what frequency will she need to apply the driving force to maintain swinging? | 0.29 Hz | |
| 14 | A flute behaves like a tube open at both ends. If its length is 65.3 cm, and the speed of sound is 340 m/s, what is its fundamental frequency in Hz? | 260 Hz | |
| 14 | A phase difference of 270° corresponds to what wavelength difference? | 3λ/4 | |
| 14 | A plane is traveling at Mach 0.950 through air at a temperature of 0ºC. What is the plane's speed? (Speed of sound at 0ºC is 331 m/s.) | 314 m/s | |
| 14 | A series of ocean waves, 5.0 m between crests, move past at 2.0 waves/s. Find their speed. | 10 m/s |
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