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it took 53 12" helium balloons to lift a pound, you have to add the weight of the string and balloons

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depends on how large the balloon is! ;D

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this is a guess i think it would take about 7 with helium in

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depends on how large the balloon is/ how light the human is!

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you need to give dimensions (volume), find the lift given by one cubic inch of helium and find out from there.

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Depends on the weight. Check the MythBusters website, they did an experiment on this.

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1 cubic meter helium lifts 1 Kg weight at sea level.

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they are used in many different types of balloons such as party balloons and hot air balloons.

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A normal helium balloon can lift approximately 14 grams. As a result, lifting 5 pounds (about 2268 grams), would require over 162 balloons. Note, however, that this is an estimate and may vary between different balloon types made by different manufacturers, as well as by how fully the balloon is inflated.

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because so many kids have let go of their helium balloons , so the plantes just sucked in the helium from the balloons and that's why most of the plantes are made of helim :)

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25 Balloons (Approx.)(I might be wrong as I am not sure)

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depends how big the helium balloon is and how many

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The mass the balloons can lift depends on the mass of the air displaced by the balloons.Mass lift-able + mass of balloons = total mass of air displaced.Mass of balloons = Total Volume X Density of heliumMass of air displaced = Total volume X Density of air.Density of helium = 1.79 X 10^(-4) Kg/m^3 No: 0.1786 kg/m3 (0 ยฐC, 101 kPa)Density of air = 1.2 Kg/m^3 No: dry air has a density of 1.28 kg/m3 (0 ยฐC, 101 kPa)1 pound = 0.45 KgVolume = Mass lift-able/ (air density - helium density)= 0.45/(1.2 - 1.79X10-4) = 0.38m^3. No: 0.454/(1.28 - 0.179) = 0.412 m3You will need enough helium balloons to cover a total volume of about at least 0.4m^3. This assumes that the temperature of the helium and the air is room temperature. I don't know what sized balloons you are considering, but we can say that:No. of Balloons = total volume/volume per balloon.If you use roughly spherical balloons of radius 10cm, then the volume per balloon is about 0.004m^3, and the number of balloons needed is about 100. But as i said, without knowing the size of the balloons you intended, i cant really say how much you would need.

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258 helium filled balloons filled to 34 psi each

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because heluim a gassic liquid that comprees therefore you can fill many baloons with heluim

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It takes about 300 balloons to lift 200 pound manballoon filled with exactly 1 sq ft of helium yields about 28.2g (upward thrust)453.6 grams/Lb453.6(1Lb) /28.2= about 16 blnsSo to get one pound off of the ground it would take about 16 balloons16x200= 3200it would take 3200 balloons to lift a 200 lb person....Only hoover not continually rise on account of the uneven weight distribution and the temp differences in each balloon helium isn't as buoyant when cold, unless the temp is consistant. Wind is a factor; as well as the amount of static charge in the air

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By using Boyle's law, you have a total of 1920 L of helium gas at 1atm. If you have 12L of Helium already all you do is subtract 12L from 1920, which gives you 1908L of Helium, and divide 3L from 1908, which gives you 636 balloons. Hope this helps!

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Helium is used in cryogenics, in deep-sea breathing systems, to cool superconducting magnets, in helium dating, for inflating balloons, for providing lift in airships and as a protective gas for many industrial uses (such as arc welding and growing silicon wafers). Inhaling a small volume of the gas temporarily changes the timbre and quality of the human voice.

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I am not sure which tank size would weigh 135lbs, but a k tank should weigh around that much. A k tank holds 194 cf of helium and will fill about 440 18" mylar balloons or about 48 36" balloons.

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At 25 degrees Celsius (77 Fahrenheit) and standard pressure (101.3 kPa) one pound of helium would fill 2768 Liters (731) Gallons It depends on how big you want to fill the balloons, the pressure of the balloons the temperature and a range of other things.

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Helium is a stable gas with a density lower than that of air, and thus can be used for many applications such as balloons and other floating instruments.

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It takes one Helium Balloon to float a Guinea pig. Guinea pigs are very light.

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There are many out there, but one of the most common is Helium. Helium balloons float because the helium inside is lighter than air. However, helium is highly flammable and explosive, so be careful when using in experiments.

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The answer is actually in your question. Helium is compressed under high pressure so it has a very high density and is surely denser than outside air. That's why it can be filled into a lot of balloons.


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