and how is a bubble formed ??
2007-07-18 08:48:16 · 5 answers · asked by Top_Gear_Biggest_Fan 5 in Science & Mathematics ➔ Earth Sciences & Geology
The bubble is formed by the surface tension of the soapy water. Soap drastically increases the surface tension of water, which is why you can blow a really big bubble with soapy water, but only tiny little ones with plain water.
The bubble will tend to be spherical because the surface tension pulls evenly in all directions, causing the surface area of the bubble to minimize for the volume of air it contains. The shape which minimizes the surface area to volume ratio is a sphere.
2007-07-18 09:19:07 · answer #1 · answered by dansinger61 6 · 3⤊ 1⤋
Air (usually warmer than the surroundings) is blown against a soap film. This film stretches, and holds the air coming at it in a roughly spherical shape until the air pressure inside is greater than the pressure coming at it. At this point, the film closes itself, and becomes a sphere due to surface tension. Since the air inside this sphere is warmer, and the soap film is exceptionally thin and lightweight, the result (a large soap bubble) rises in the cooler air.
If the total pressure coming at the soap film is greater than the total elastic capacitiy of the soap film, it pops before it closes (like an over inflated balloon pops).
The soap film tries to contract again, and its thickness varies as it does (accounting for the changing colors seen on the bubble as it floats). When this thickness at any point on the sphere becomes so thin that it can not hold against the higher pressure inside the bubble, it acts like a hole in a balloon would, and the bubble pops.
2007-07-18 16:23:22 · answer #2 · answered by Don E Knows 6 · 0⤊ 1⤋
Why do bubbles float up? Warm air is lighter than cold air. If the air you blow into a bubble is warmer than the air around you, the bubble will float up
2007-07-18 15:56:19 · answer #3 · answered by nikki 2 · 3⤊ 1⤋
Generally they don't float - they are blown around by breezes and such. But in a perfectly calm room they will fall slowly to the ground as gravity acts on the substance of the bubble I.E water and soap.
2007-07-19 02:03:04 · answer #4 · answered by Bazz 1 · 2⤊ 1⤋
Bubbles float in the air by the exposure of mass vmy=2x+fgh+-2= what make bubbles float in the air.
2007-07-18 16:22:47 · answer #5 · answered by lilkrazyme3 2 · 1⤊ 2⤋