A source of sound of frequency 600 Hz is placed inside water. The speed of sound in water is 1500m/s and in air it is 250 m/s. the frequency of sound detected in air is" A. 200 Hz B. 3000HZ C. 900HZ D. None of the above
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- QUESTION 40 Which of these expressions yields the speed of sound in air in SI units if the air temperature is 114 degrees Celsius? a. 331.5 + 0.607 + 114 b. 331.5 + 0.607 times 1149. A jet flies toward higher altitude at a constant speed of 1 963 m/s in a direction that makes an angle 0 with the horizontal (Fig.). An observer on the ground hears the jet for the first time when it is directly overhead. Determine the value of 0 if the speed of sound in air is 340 m/s.12. Two trains on separate tracks moves toward each other. Train 1 has moved with a speed of 118 km/h and train 2 moved with a speed of 81.0 km/h. When train 1 blows its horn, it emits a frequency of 475 Hz. If Train 2 heard the sound with a 533 Hz, what is the speed of the sound in the air?
- 5. A bat is flying towards a tree while emitting a sound wave with frequency 100 kHz. The bat hears a beat frequency of 3 kHz between the emitted and reflected sound. How fast is the bat flying? (Hint: break the problem into two parts, first with the bat as the source and the tree as the listener, and then with the tree as the source and the bat as the listener.If the sound volume increases from 30 dB to 80 dB, then the intensity of the sound increases by a factor of: A. 5 B. 50 С. C. 1,000 D. 50,000 E. 100,000The noise level generated by domestic air conditioner ranges between
- 12. When two tuning forks are vibrating at the same time one observes that the sound grows louderthen softer at regular intervals. The change in volume occurs at a rate of exactly 48 times in16.0 s. If one tuning fork is known to have a frequency of 256.0 Hz, what are the two possiblefrequencies of the second tuning fork?The sound level at a distance d=34 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy is being produced by the loudspeaker?. The threshold of hearing, lo = 1*10-12 W/m2, A. 0.5265 B. 0.3812 C. 0.1453 D. None E. 0.581210. If the intensity for 5 bugs is 6 x 10-12 W/m² then what is the intensity for 1 bug? For 3 bugs? 11. If 1 bug makes a sound of 8 dB then what will 25 bugs sound like? 12. If 4 bugs make a sound of 14 dB then what will 25 bugs sound like?
- Moving to another question will save this response. Quèstion 10 "The bulk modulus of water is 41.2 x 10ng Pa, and its density is 79.0 x 10^3 kg/m^3. What is the speed of sound (in m/s) in water?" 1.62E-01 2.89E+02 O none of these 2.09E+07 O 7.22E+02 A Moving to another question will save this response. DELL2) The speed of sound in air is 343 m s. If the frequency of a sound wave is 220 Hz, what is the wavelength? a) 0.9 m/ b) 1.3 m c) 1.6 m d) 2.2 mDetermine the wavelength of the sound for 24 Hz. Determine the wavelength of the sound for 23 kHz.