A coherent region of fluid embedded in a fluid with different properties (air in water) or a coherent region of fluid surrounded by a membrane embedded in a fluid which may or may not be different (such as air in a soap membrane).

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Bubble pressure ascending?

In water bubbles rise up to the surface. As it rises, does the bubble's pressure decrease or stay the same? I think stays the same.
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What could be added to tap water to reduce air bubble formation on a submerged object?

Submerge your hand in a bucket of water. Some air bubbles appear immediately and others add to the surface of the hand over time. Is there anything that could be added to the water to reduce the ...
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The effects of heat on gravitational fields

In boiling soapy water, globs of soap coalesce as the temperature increases to boiling. Does this mean that temperature increases the gravitational pull of bodies?
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Bubble in a pipeline

I am just thinking about this phenomenon: We have a horizontal pipeline with a flowing liquid, which contains a small bubble of gas. How do the dimensions of this bubble change when it reaches a ...
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How do sound wave interact with a bubble?

When a sound wave propagates in a medium consist of liquid with a bubble, what cause oscillation of the bubble? Negative pressure of sound cause drop of pressure in both liquid and bubble ...
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A true vacuum bubble will expand slower than our universe expansion rate?

Why our universe is supposed to expand faster than light beyond the Hubble limit while a bubble nucleation of true vacuum is supposed tho expand asymptotically to the speed of light ?