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Related Concept Videos

Sound as Pressure Waves01:17

Sound as Pressure Waves

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Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
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Shock Waves01:16

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While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
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Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Deriving the Speed of Sound in a Liquid01:09

Deriving the Speed of Sound in a Liquid

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As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
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Korotkoff Sounds01:12

Korotkoff Sounds

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Korotkoff sounds are the specific sounds heard while measuring blood pressure using a sphygmomanometer, typically with a stethoscope or a Doppler device. They are named after Russian physician Nikolai Korotkov, who first described them in 1905. These sounds correspond to turbulent blood flow in the artery as the blood pressure cuff is gradually released after inflation.
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Travelling Waves01:04

Travelling Waves

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A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
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Related Experiment Video

Updated: Sep 4, 2025

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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Water hammer and Corrigan's pulses.

Ryohei Ono1,2, Raita Uchiyama2, Yukinori Kohno2

  • 1Department of Cardiovascular Medicine Chiba University Graduate School of Medicine Chiba Japan.

Clinical Case Reports
|July 18, 2022
PubMed
Summary

Corrigan's pulse, seen in aortic regurgitation, involves rapid carotid artery expansion and collapse. Water hammer pulse is a similar phenomenon observed in peripheral arteries.

Keywords:
Corrigan’s pulseaortic regurgitationphysical examinationwater hammer pulse

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Area of Science:

  • Cardiology
  • Vascular Physiology

Background:

  • Aortic regurgitation is a condition where the aortic valve does not close properly, leading to blood flowing back into the left ventricle.
  • Understanding pulse characteristics is crucial for diagnosing cardiac conditions.

Observation:

  • Corrigan's pulse describes the exaggerated pulsation in the carotid arteries.
  • This pulse is characterized by a sudden distension followed by a rapid collapse.

Findings:

  • Corrigan's pulse is specifically associated with the carotid arteries in the context of aortic regurgitation.
  • Water hammer pulse is the term used for this type of pulse when observed in peripheral arteries.

Implications:

  • Differentiating between Corrigan's pulse and water hammer pulse aids in precise diagnosis of cardiovascular abnormalities.
  • These pulse characteristics provide valuable clinical indicators for hemodynamic assessment.