Frequency Assignment | Professional Writing Services
1 V4L) (d) 100 ( U17) 200 00 13. Draw the fifth mode of vibration in a pipe open on both ends. 14. Draw the fifth mode of vibration in a pipe closed on one end. Exercise m/s. 1. A tuning fork vibrating at 5 Hz has a period of (in s) (a) 0.1(b) 0.2 (c)1 (d) 5 2. The maximum frequency range of human hearing is (a) 0 Hz (b) 20 Hz (c) 100Hz (d) 20000 Hz (d) $1000 Hz 3. The speed of sound a 100°C is 4. The wavelength oti romnd wave whose frequency is 343 Hz at room temperature is (in m) (a) 0.17 (1) 2014 (1) 1 v=f 5. The intensity of sound o m from a source is 1.0 W/m².
The intensity at 6 cm is (in W/m) (a) % (b) (c) 1.0 20 6. The second standing wa s closed tube in air has a frequency of 1000 Hz. The length of the tube is (a) above 0.00 cbove 0 K (c) above that of its surrounding (d) high enough for it to glow. 7. Longitudinal waves do not itavel in (a) solids (b) liquids (c) vacuum (d) gases 8. An ambulance emits a sound at 500 Hz. A passenger in the car approaching the station at 20 m/s hears a frequency (in Hz) (a) 0 (b) 450 (c) 540 (d) 500 9. An ambulance emits a sound at 500 Hz. A passenger in the car going away from the station at 16 m/s hears a frequency (in Hz) (a) 500 (b) 450 (c) 540 (d) 0 10. An ambulance emits a sound at 500 Hz. A passenger in the car approaching the station at 20 m/s hears a frequency (in Hz) (a) 0 (b) 450 (c) 540 (d) 500 11. An ambulance emits a sound at 500 Hz. A passenger in the car going away from the station at 16 m/s hears a frequency (in Hz) (a) 500 (b) 450 (c) 540 (d) 0 12. The sound level of the threshold of hearing is (in dB) (a) 0 (b) 1 (c) 2 (d) 3 13. The sound level of a 10 W/m² intensity is (in dB) (a) 1 (6) 10 (c) 120 (d) 130 (e) 200 14. A 40 dB sound level has intensity (in W/m?) (a) 10% (6) 10* (c) 10 (d) 10
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