1.When the period of oscillation decreases, the (a) amplitude increases, (b) frequency increases, (c) wavelength increases, (d) frequency decreases. 2.Sound is (a) transverse wave, (b) longitudinal wave, (c) standing wave, (cl) magnetic wave. 3.When two waves interfere, which of the following add? (a) wavelength, (b) frequency, (c) phase, (d) amplitude. 4.The wave speed is equal to (a) the ratio of the frequency and wavelength, (b) the ratio of the frequency and the period, (c) the product of the frequency and wavelength, (cl) the product of the period and wavelength. 5.The number of oscillations per time is given by the (a) wave speed, (b) wavelength, (c) frequency, (cl) nodes. 6.When two waves of equal amplitude and wavelength traveling in opposite directions interfere, they (a) produce a wave of greater strength, (b) annihilate each other, (c) produce a standing wave, (d) none of these. 7.Points of maximum amplitude in a standing wave are (a) out of phase, (b) overtones, (c) antinodes, (d) pitch. 8.If an oscillation has a frequency of 1 Hz, it has a period of (a) Zseconds, (b) 1/Zseconds, (c) lsecond, (d) loseconds. 9.The propagation of energy through a medium or space from a disturbance is a (a) wave, (b) vibration, (c) oscillation, (cl) translational motion. 10.The oscillations are parallel to the wave motion in (a) water waves, (b) light waves, (c) sound waves, (d) resonant strinCIs. 11.Points of zero amplitude on a string or rope where standing waves are present are called (a) crests, (b) antinodes, (c) period, (d) nodes. 12.A sound with a frequency of 200 Hz is in region of the sound frequency spectrum (a) infrasonic, (b) audible, (c) ultrasonic, (d) supersonic. 13.The bending of sound waves is called (a) resonance, (b) reflection, (c) refraction, (d) interference. 14.Sonar range detecting is based on (a) refraction, (b) reflection, (c) resonance, (d) interference. 15.The maximum distance of an oscillation from the center, or equilibrium, position is called (a) wavelength, (b) period, (c) amplitude, (d) frequency. 16.In SI system one hertz (Hz) is the unit of the (a) wavelength, (b) speed of sound, (c) frequency, (d) period. 17.Waves travel with a speed of 150 m/s and a wavelength of 1.5m. What is the frequency? (a) 1000 Hz (b) 100 Hz (c) 10 Hz (cl) 225 Hz 18.A wave has a wavelength of 1.2m and a period of 0.6second. What is the speed? (a) 2m/s (b) 20 m/s (c) 0.7 m/s (d) 0.5 m/s 19.A wave has a frequency of 400 Hz and a speed of 200 m/s. What is the wavelength? (a) 5 m (b) 0.5 m (c) 50 m (d) 2 m 20.A wave has a wavelength of 0.75 m and a frequency of 440 Hz. What is the speed? (a) 33m/s (b) 300 m/s (c) 3 m/s (d) 330 m/s