Physics Mastery Lab

-“The wave disturbance travels 300 m for each wavelength.” The speed of the wave does not determine how long the wave disturbance travels for each wavelength. We do not have enough information to determine that.

12. Change to pulse, fixed end with zero dampening and high tension. Send a pulse and observe what happens to the reflected wave. Sketch the pulse shape before and after the reflection with the fixed end.

HS-PS4-1. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media

An Ultrasound Technician, also known as diagnostic medical sonographers, use high-frequency sound waves to create images of soft tissue in a patient's body. Physicians use these images to diagnose abnormalities and diseases in a patient. As early as 1826, a Swiss physicist name Jean-Daniel, had effectively used an underwater bell to determine the speed of sound in the waters of Lake Geneva. In the late 1800s, physicists were working successfully towards defining the fundamental physicists of sound waves, transmission, propagation, and refraction. Lord Rayleigh was the first to describe sound waves as a mathematical equation, forming the basis of future practical work in acoustics. Lord Rayleigh famous work “the Theory of Sound” was published

Unlike a wire sounder tested and rejected earlier in the voyage, the Baillie sounder was able to move within the ship’s existing system of instrumentation and materials. As with HMS Sylvia, sounding was conducted from the mainyard, and a steam engine on the deck helped to retrieve the sounder from the ocean floor. Similar to the Hydra, officers timed and calculated the Baillie’s rate of decent. When the sounder slowed, the ocean’s depth was ascertained by the length of the sounding line.

This paper demonstrates the existence of standing sound waves and superpositional wave interference in single-side open tubes through measurement using a microphone. Relations used in modeling are given and referenced consistently throughout the paper. The measurement data supports the conclusion in a clear manner.

Sound waves are nothing more than an energy transfer through a medium be it through a liquid, solid, or a gas. Sound pressure or intensity is measured on logarithmic scale in decibels dB which increases on an order of magnitude. For instance a quiet conversation would be around 30 dB and whereas the human pain threshold would be just over 100 dB. While the pitch or frequency of the sound is measured in hertz or Hz, the higher the hertz the higher the pitch of the sound and vice versa (Hildebrand, 2004).

Predicted (Theoretical) Length (m) Experimental Length (m) % Deviation L1 0.18 m 0.17 m - 5.6 % L2 0.54 m 0.53 m - 1.9 % Experimental Uncertainties Some possible experimental uncertainties that may have caused inaccurate results include: Throughout the duration of the experiment the room temperature may have changed thus changing the speed of sound in the room. Human errors such as not noticing the change in sound or because the room was loud it could not be heard.

"What it is telling us is the sound is located between about 7,000 kHz and 8,000 kHz. There are about 20 peaks, and they seem to be equally spaced. All these peaks correspond to a different frequency," said Kausik Sarkar, an acoustics expert and engineering professor at The George Washington University who reviewed the recording with the AP.

Once the wavelength was determined using the temperature the speed could be calculated. Both wavelength and speed are variables in the velocity of sound formula (v = ƛf ). Using algebra, frequency could be determined by substituting wavelength and speed. The percent error for this lab could have been affected by not accurately determining the point of which the sound reached its loudest point.

at octave frequencies between 250 Hz and 4 kHz) was carried out and an average pure-tone

The principle of sonic logging involves a transmitter and a receiver wherein a signal is sent from the transmitter and the amount of time taken until it has reached the receiver is recorded. The speed of sound in the subsurface depends on the elastic properties of the rock matrix, the porosity of the formations, fluid content and pressure of the formation (Petroleum Transactions, Members AIME 1958). Sonic logging is carried out after the well has been drilled.

Sound is apart of our everyday lives. Regardless of if it's the sound of a leaking water faucet, the tapping of a pencil or even the whistling of wind, we’re surrounded by the physics of sound at all times. Sound waves come in various

p1 ( π × (0.8) 3 ) = (1.01 × 10 5 Pa )( π × (1.0) 3 )

22,050 kHz. Recall each time Matlab is run this is equivalent to a different experiment