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Why Does a Helium Balloon Rise in Air

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Helium balloons rise because of a force called buoyancy. CHelium has a higher density than air. Pin On Baby Shower Rabbit Theme A balloon full of air sinks because the mass of the air inside the balloon is greater than the force of air outside the balloon. . The balloon rises because of buoyancy. This causes the elastic material of the latex helium balloon to expand. Therefore each cubic foot of air contained in a hot air balloon can lift about 7 grams. The balloon will stop ascending if the balloon reaches a height where density of air is nearly equal to. It turns out that helium is a lot lighter than air. If you need helium for your balloons go here and get a free helium quote from Zephyr. Thats not much and this is why hot air balloons are so huge to lift 1000 pounds you need about 65000 cubic feet of hot air. A helium balloon rises because helium is less dense than air. The force of a helium filled bal...