A student drops a tuning fork that is labelled at 288 Hz. When they later play that tuning fork with a second non-dropped tuning fork of 288 Hz, they hear 7 beats in 3.00 seconds. Calculate the new frequency of the dropped tuning fork. Write a brief justification for your answer.
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- From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.855 times smaller than that emitted by the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car?Two trumpets are being tuned using beats. One has a frequency of 440 Hz. When the second is played along with it, 15 beats are heard in 5.0 s. What are the possible frequencies of the second trumpet?You hear a sound of (5.6x10^1) decibels. What is the intensity? Give your answer in microwatts/m2 to 2 sf. Assume the threshold of human hearing is 1.0x10-12 W/m². Use two significant figures for your answer. Note: 1 µW = 1×106 W Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 Answer
- The longest pipe on a certain organ is 3.74 m. (a) What is the frequency f7 (at 0.00°C) if the pipe is closed at one end? 22.125 Your response differs from the correct answer by more than 10%. Double check your calculations. Hz (b) What is the frequency f7 (at 0.00°C) if the pipe is open at each end? 44.251 Your response differs from the correct answer by more than 10%. Double check your calculations. Hz (c) What will be the frequencies f7 at 20.0°C? pipe frequency (Hz) 22.927 closed Your response differs from the correct answer by more than 10%. Double check your calculations. 45.855 open Your response differs from the correct answer by more than 10%. Double check your calculations.A sound wave in an unknown fluid medium takes 580 μs to travel 3.00 m. What is the bulk modulus of the fluid, if the density is 4.30 x 103 kg/m3? A 1μs is 1 x 10-6s.A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 64.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?
- Sound waves travel at roughly 340 m/s at room temperature. The minimum hearing range of a human is 20Hz. a) What is the wavelength of this wave? b) Could this wavelength fit inside the dimensions of Room 411( room dimensions are roughly 11.5 m x 8.7 m)? Justify your answer with sound reasoningAn organ pipe (L = 3.5 m) is closed at one end. Compute the wavelengths and frequencies of the first three modes of resonance. Assume the speed of sound is v = 343.00 m/s. fi : Hz f3 Hz f5 = HzA train whistle is heard at 330 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 320 Hz. What is the speed of the train before slowing down?Express your answer to two significant figures and include the appropriate units.What is the speed of the train after slowing down? Express your answer to two significant figures and include the appropriate units.
- A cello string has a fundamental frequency of 65.40 Hz. What beat frequency is heard when this cello string is bowed at the same time as a violin string with the frequency of 192.7 Hz? Give the answer to three decimal places. in HzTwo tuning forks are both rated at 242Hz, but when they are struck at the same time, a beat frequency of 4.00 Hz is created. 1) If you know that one of the tuning forks is in tune (but you are not sure which one), what are the possible values of the "out-of-tune" fork? Find the smallest value. (Express your answer to three significant figures). 2) 1) If you know that one of the tuning forks is in tune (but you are not sure which one), what are the possible values of the "out-of-tune" fork? Find the largest value. (Express your answer to three significant figures).10:40 AM Thu May 19 98% T + : A trombone player stands at the end zone (x = 0) of a football field and begins to play its fundamental tone. Assume the trombone is a half open tube that is 3 m long. How much would the trombone player have to move the slider in cm to play 25 Hz? Be sure you know how a trombone works! 11 12