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The Valsalva maneuver is performed by a forceful attempt of exhalation against a closed airway, usually done by closing one's mouth and pinching one's nose shut while expelling air, as if blowing up a balloon.
It is more likely to occur in persons who regularly have raised pressure in the mouth, for example wind instrument players, [6] and balloon [1] and glass-blowers. [7] Cases have also been reported with bicycle tyre inflation, [1] whistling, [1] nose blowing, [1] cough [1] and valsalva manoeuvre to clear the ears. [1]
The balloon trick To do this, blow up balloons in warm air, then expose them to cold air and they will deflate. Eventually they will reinflate when you return them to warm air.
Modellers will use an assortment of balloons, usually in various colors. Balloon sizes are usually identified by a number: the most common size of twisting balloons is called a "260", as it is approximately two inches in diameter and 60 inches long. Thus, a "260" is 2×60 inches and a "160" is 1×60 inches when fully blown up.
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Hot water bottle blowing is the deliberate inflation of a hot-water bottle by blowing. Air is breathed into the bottle until it stretches beyond its capacity and consequently explodes. It is a challenging feat of strength which is included in the Guinness World Records. The challenge is most commonly undertaken by breathing air from the mouth ...
It could blow up balloons, smoke, synthesize text, and move his legs and arms. In 1939, he received his pet, and the first mainstream animatronic, Sparko. [11] However, unlike Elektro, Sparko had no built in computer and was not remote controlled, instead using an external computer controlled by an operator. [11]
The key to understanding the behavior of the balloons is understanding how the pressure inside a balloon varies with the balloon's diameter. The simplest way to do this is to imagine that the balloon is made up of a large number of small rubber patches, and to analyze how the size of a patch is affected by the force acting on it.