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<p>air bubbles in water, smaller bubbles undergo <a href="page.php?w=isothermal">isothermal</a> pulsations.  The corresponding equation for small bubbles of surface tension ? (and negligible liquid <a href="page.php?w=viscosity">viscosity</a>) is</p>

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<p>Excited bubbles trapped underwater are the major source of liquid <a href="page.php?w=sound">sound</a>s, such as inside our knuckles during knuckle cracking, and when a <a href="page.php?w=rain">rain</a> <a href="page.php?w=droplet">droplet</a> impacts a surface of water.</p>

<p><big>Physiology and medicine</big></p><p>
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