2. Hearing. When sound waves strike the eardrum, this membrane vibrates with the same frequency as the sound. The highest pitch that typical humans can hear has a period of 50.0 ps (microseconds). What are the frequency and angular frequency of the vibrating eardrum for this sound?
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- 10. The highest key on a piano corresponds to a frequency about 150 times that of the lowest key. If the string for the highest note is 5.0 cm long, how long would the string for the lowest note have to be if it had the same mass per unit length and was under the same tension17. Harvey, a harpist, plucks a 0.600 m long string on his harp. The string has a first overtone of 1046.6 Hz. How fast does the vibration travel through the string? * a. 682 m/s b. 648 m/s c. 1256 m/s d. 432 m/s e. None of the above5. An organ pipe is 118 cm long. What is the third audible harmonic if the pipe is open at both ends? The speed of sound in air is 345 m/s. Hz 6 ccm cci16 c
- 1. a) Using the diagram below, determine the wavelength and amplitude of the sound wave below. b) If the wave speed was given as v = 340 m/s, what is the frequency (Hz) of this wave? c) Is the frequency in the audible range? 2. A pendulum oscillates 21 times in 30 seconds. a. What is the frequency of the pendulum’s oscillations ?b. What is the period of the pendulum’s oscillations ? c. What is the length of the pendulum?( Round answer to the nearest centimeter) 3. A pendulum is 0.65 meters long. a) What is the period of oscillation? b) What is the frequency of its oscillations? Round to the nearest hundredth. 4. A water wave has a frequency of 2 Hz, and there are 5 meters between each crest on the wave. a) How fast is the wave moving? b) What is the period of the wave? 5. 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(…60. What is the length of an open end air column that would resonate in the first harmonic at 262 Hz when the speed of sound is 345 m/s? A. .33 metersB. 1.32 metersC. .77 metersD. .66 meterswhat is the shortest resonant length of the air column closed at one end if the wavelength of sound wave is 40 cm? a. 10 cm b. 20 cm c. 40 cm d. 80 cm e. 160 cm
- 4. A copper organ pipe open at both ends has two successive harmonics with frequencies of 215 Hz and 257 Hz. What is the length of the pipe if it's a cold morning at 10 °C?You are at a loud rock concert. Describe how the sound goes from an external air wave to a mechanical vibration in the middle ear, then explain why it took a whole day for you to hear normally again after the concert. Include all the structures involved.2. Transverse waves are sent along a 5.00-m long string with a speed of 30.0 m/s. The string is under a tension of 10.00 N. What is the mass of the string?
- 4. What are the first three resonant lengths in a closed air column if the frequency of the tuning fork is 384HZ, and the air temperature is 22°C.Which of the following four options is the correct one Which one or more? a. A spectrogram is a graph of frequency against amplitude and time with time on the x-axis, frequency on the y-axis and amplitude indicated by brightness or colour. b. A spectrogram is a graph of amplitude on the y axis against time on the x-axis. c. A spectrogram is a graph of frequency against amplitude and time with time on the x-axis, frequency on the y-axis and amplitude indicated by crosses. d. A spectrogram is a graph of amplitude against frequency and time with frequency on the x-axis, time on the y-axis and amplitude indicated by brightness or colour.4. You pick up an empty 16 oz. plastic coke bottle and blow a steady airstream over the top edge of the bottle's mouth to set the air in the bottle into resonance. What is the frequency of the 1" mode for the bottle? (Hint: you'll need a metric ruler for this question). 5. The Empire State Building in NYC is approximately 440 meters in height. The superstructure of the building is made of steel which means that energy will be transmitted through the buildings core at 1500 m/sec. If the building is being blasted and buffeted by a strong wind storm, at what frequency will the building sway in it's 1st mode of vibration. (Hint: think about what type of a resonator a building could be)