TAILIEUCHUNG - physics_test_bank_split_18

Tham khảo tài liệu 'physics_test_bank_split_18', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http Chapter 17 WAVES II 1. The speed of a sound wave is determined by A. its amplitude B. its intensity C. its pitch D. number of harmonics present E. the transmitting medium ans E 2. Take the speed of sound to be 340 m s. A thunder clap is heard about 3 s after the lightning is seen. The source of both light and sound is A. moving overhead faster than the speed of sound B. emitting a much higher frequency than is heard C. emitting a much lower frequency than is heard D. about 1000 m away E. much more than 1000 m away ans D 3. A sound wave has a wavelength of m. The distance from a compression center to the adjacent rarefaction center is A. m B. C. D. need to know wave speed E. need to know frequency ans B 4. A fire whistle emits a tone of 170 Hz. Take the speed of sound in air to be 340 m s. The wavelength of this sound is about A. B. C. D. E. 340 m ans C 5. During a time interval of exactly one period of vibration of a tuning fork the emitted sound travels a distance A. equal to the length of the tuning fork B. equal to twice the length of the tuning fork C. of about 330 m D. which decreases with time E. of one wavelength in air ans E 256 Chapter 17 WAVES II Simpo PDF Merge and Split Unregistered Version - http 6. At points in a sound wave where the gas is maximally compressed the pressure A. is a maximum B. is a minimum C. is equal to the ambient value D. is greater than the ambient value but less than the maximum E. is less than the ambient value but greater than the minimum ans A 7. You are listening to an A note played on a violin string. Let the subscript s refer to the violin string and a refer to the air. Then A. fs fa but Xs Xa B. fs fa and Xs Xa C. Xs Xa but fs fa D. xS Xa and fs fa E. linear density of string volume density of air ans A 8. Beats in sound refer to A. interference of two waves of the same frequency B. combination of .

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