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What value for the acceleration of gravity g do you get if a pendulum of length L=2.50 m takes 3.70 seconds to complete one full swing? A. 1.45 m/s2 B. 9.81 m/s2 C. 7.21 m/s2 D. 6.21 m/s2 OA OB OC ODQuestion 2 0 / 1 pts A 3.45-kg mass, attached to a spring that has a spring constant of 5.28 x 10" N/m, is free to oscillate on a horizontal frictionless surface. The mass is pulled to a position 10.6 cm [W] of its resting position. What will be the acceleration of the mass when it is released? a. 17.7 m/s' [E] c. 16.2 m/s' [E] b. 17.7 m/s2 [W] d. 16.2 m/s2 [W] OA OB OC OD Question 3 0 / 1 pts A harmonic oscillator consists of a 6.75-kg mass attached to a spring with a spring constant of 3.50 x 105 N/m. If the mass, which oscillates on a horizontal frictionless surface, reaches a maximum speed of 5.90 m/s, what is the amplitude of the oscillation? a. 0.226 m C. 0.292 m b. 0.259 m d. 0.315 mQuestion 4 0 / 1 pts Which of the following statements applies/apply to the reflected wave that is created when a wave travelling in a certain direction reflects from a surface? I. The angle of the incident wave is equal to the angle made by the reflected wave II. The amplitude of the reflected wave is less than the amplitude of the incident wave. a. I only c. both I and II b. II only d. neither I nor II A B OC OD Question 5 0 / 1 pts A pulse with a speed of 5.06 m/s takes 0.890 s to pass a point in a spring. How long is the pulse? a. 4.50 m c. 5.26 m b. 4.15 m d. 4.97 m A B OC DQuestion 6 0 / 1 pts A Standing Wave Pattern in a Spring C B ox E Refer to the diagram A Standing Wave Pattern in a Spring to answer this question. The number of wavelengths between fixed points in the diagram is a. 2 C. 4 b. W d. 5 OA OB OC ODQuestion 7 0 / 1 pts A Standing Wave Pattern in a Spring C B E Refer to the diagram A Standing Wave Pattern in a Spring to answer this question. The labelled points that are located at nodal points are a. A and C c. A, C, and E b. B and D d. E only OA OB OC ODQuestion 8 0 / 1 pts A pendulum takes 0.25 s to swing from right to left. What is its frequency of oscillation? a. 1.0 Hz C. 2.0 Hz b. 3.0 Hz d. 4.0 Hz OA B OC OD Question 9 0 / 1 pts Which of the following are conditions for simple harmonic motion? I. The frequency must be constant. II. The restoring force is in the opposite direction to the displacement. III. There must be an equilibrium position for the motion. a. I only c. II only b. I and II only d. I, II, and IIIQuestion 10 0 / 1 pts The graph shows data taken during an experiment to verify Hooke's law. What is the spring constant for the spring used in the experiment? 10 Force -F (x 102 N) NAO 20 Position -x (x 10*2 m) . 9.5 x 103 N/m c. 1.5 x 10* N/m b. 7.5 x 103 N/m d. 6.7 x 103 N/m OA OB OC ODQuestion 11 0 / 1 pts Block on a Spring A block on a horizontal frictionless surface attached to a spring. Diagram is not to scale. -X max + Xmax II III 0009008008008060600800 Refer to the diagram Block on a Spring to answer this question. The block in the diagram is attached to a spring on a horizontal frictionless surface, as shown. When the block is released, it oscillates back and forth between the positions indicated by the vectors X_ Which points (I, II, and III) best indicate where the velocity of the block will be zero? a. I, II, and III c. II only b. I and II d. I and III OA OB OC DQuestion 12 0 / 1 pts Suspended Spring Supports Mass A spring has a length 4, when it is suspended with no mass attached and a length Z2 when a mass m is attached. Assume that the mass of the spring does not affect the calculations. (The diagram is not to scale.) L2 902001020000 Rest position of mass suspend on the spring Rest position of spring with no mass attached Refer to the diagram Suspended Spring Supports Mass to answer this question. A 15.5-kg mass is suspended on a spring with a spring constant of 2.45 x 10" N/m. The spring has a length (Li) of 32.0 cm when it is in its rest position. What is the length of the spring plus suspended mass at equilibrium position? a. 32.5 cm C. 38.2 cm b. 35.7 cm d. 41.4 cm OA OB OC ODQuestion 13 0 / 1 pts Ray water is the ceaser Wavefront medium air Air Water 2 water a. Wavelength is greater in the water than in the air c. Wave speed is smaller in water than air b. wave frequency is smaller in the water than in the air d. Wave frequency is greater in water than in air OA OB OC ODQuestion 14 0 / 1 pts Closed-Pipe Resonance A tuning fork held over a closed pipe produces resonance for particular lengths (L). (This diagram is not to scale.) Tuning fork B Tuning fork A Sliding closed-pipe tube Water Refer to the diagram Closed-Pipe Resonance to answer this question. Tuning fork A is held over the end of the variable-length closed pipe. The length (L) of the pipe is gradually increased. As the pipe gets longer, the sound of the tuning fork first gets louder, then softer, then louder again. In terms of the wavelength of the sound produced by the tuning fork, which series of numbers represents possible values for the length of the pipe at which you would hear the loudest sound? a. L = - 1 and - A C. L = = 1 and = 1 b. = - 1 and = 1 d. Z = = 1 and 11Question 15 0 / 1 pts A 1.50-m-long pendulum has a period of 1.50 s. The acceleration due to gravity at the location of this pendulum is m/s2. (Record your three-digit answer on the answer sheet.) Question 16 0 / 1 pts A sound wave has a speed of 335 m/s in air. If the frequency of the sound is 256 Hz, what is the wavelength of the sound? (Record your three-digit answer on the answer sheet.)Question 17 0 / 1 pts Closed-Pipe Resonance A tuning fork held over a closed pipe produces resonance for particular lengths (L). (This diagram is not to scale.) Tuning fork B Tuning fork A Sliding closed-pipe tube Water Refer to the diagram Closed-Pipe Resonance to answer this question. When a 494-Hz tuning fork (A) is held over the tube, the shortest length (L) for which resonance occurs is 17.0 cm. Without changing the length of the tube, tuning fork A is replaced by tuning fork B. While tuning fork B is vibrating over the end of the tube, the tube is lengthened until the next point of greatest resonance is produced. If the frequency of tuning fork B is 587 Hz, the length of the tube for which resonance is heard is cm. (Record your three-digit answer on the answer sheet.) Enter your answer as centimetres.d Question 18 0 / 1 pts The speed of sound in air is measured at 335 m/s. The frequency of a sound emitted by a source moving toward you is found to be 458 Hz. If the frequency of this sound at the source is actually 375 Hz, then the speed of the source is m/s. (Record your three-digit answer on the answer sheet.)