Question about fireproof balloons?
It will pop either when the gas inside the balloon expansion exceeds the elasticity of the balloon, or when the heat degrades the fabric of the balloon. The water inside makes no difference since any heat above room temperature will excite the molecules of the water and begin the evaporation process turning the liquid water to gas.
What are the steps of a fire water balloon?
Requirements -2 BalloonsWaterCandleKitchen LighterWhat to do -Fill one of the balloons with air and the other with a little water. Light the candle with the kitchen lighter.What happens -When you bring the balloon with only air close to the candle, it bursts immediately after it making contact with the flare. Sometimes it explodes even before it makes contact. The second balloon with the water in it, when brought close to the candle doesn’t explode, even though the balloon is kept directly under the flare for some amount of time.Why this happens -This happens because water is a great conductor of heat and does not allow the balloon to overheat.More details about the Fireproof Balloon experiment.
Can the material hot air balloons are made out of catch on fire?
Hot air balloons will burn. I personally saw two balloonists die when their gondola struck a power line. The balloon's propane gas line ruptured and the gas ignited. The resulting gas fire was sufficiently intense to cause the balloon bag material to catch fire. The burning bag fell on the passengers and the gondola on the ground and turned those guys into "crispy critters". Not a pretty sight. The word you are looking for is fire "resistant", not "fireproof" and yes, balloons are made from fire resistant material.
How did they ensure that dirigible gas bags made from ox guts was hydrogen proof?
Originally answered: How did they ensure that dirigible gas bags made from oxygen was hydrogen proof?Not sure how you go about making a gas bag from oxygen. The hydrogen bags on dirigibles were made of cotton cloth, and made gas tight with a coating of ‘dope’, a mixture of thinned varnish and fillers. In the case of the famous Hindenburg disaster, the fillers in the dope were aluminum powder and iron oxide, which proved to be a bad idea, but there are many things today that weren’t available at the time that would make much safer gasproofing coatings.Question as clarified by question writer: How did they ensure that dirigible gas bags made from ox gut was hydrogen proof?Some of the early experimentation with gases was done using animal membrane as a material to construct the bags. The inner membranes of the intestines could be cleaned, stripped of flesh and dried. This would produce a product pretty much identical to sausage casing, a thin, semitransparent, impermeable membrane. Oiling this would give it some flexibility and increase its resistance to the gas permeation. Stitching this together into larger bags would require the seams to be sealed with some sort of resin or pitch. This construction was short lived, as the maximum size of the bag is limited by the low strength of the material. I doubt that there were very many man-carrying balloons made from animal membranes. Even in the 1700’s, Humphry Davy was using oiled silk bags in his gas lab.
Is Aerographene the ideal balloon or dirigible filler?
No.Reports tell of aerographene being extremely light - 160 g/m^3 - about 4% lighter than helium.However, this does not include the air inside the pores. So really, aerographene is the density of air plus 160 g/m^3 = 1365 g/m^3 at standard conditions. Suddenly it’s 8 times denser than helium.The question realises this and asks about ‘evacuated aerographene’.Unfortunately aerographene has virtually no structural rigidity. It is like a sponge. This makes it useful for many applications, as it can be compressed to a fraction of its original volume and bounce back. If you enclosed it in a membrane and evacuated it, though, the atmospheric air pressure outside the dirigible would crush it to less than 10% its original size, where its density would be 1600 g/m^3, which is 25% heavier than air.You could evacuate it, then fill it up again with 1 atm of helium. This would cancel out atmospheric pressure and keep the shape of the envelope, but your balloon would only be 4% lighter, despite the astronomical cost of the operation.BONUS TIP:Something which surprises many people when we talk about densities as 4% this and 50% that, is that buoyancy is a game of subtraction, not division. If an aerographene - helium mix is 4% lighter than pure helium, that does not give it 4% more lift.Hydrogen gas is half the density of helium, yet it only provides a bit less than 8% more lift.This is because you subtract the density of the lifting gas from the density of air, not divide it.1m^3 of air = 1.205kg at SLC1m^3 of H2 = 0.0893kg at SLC1m^3 of He = 0.1664kg at SLC1m^3 of He+aerographene = 0.159744kg at SLCdifference in weight (buoyancy) between 1m^3 of Air and H2 = 1.1157kgdifference in weight (buoyancy) between 1m^3 of Air and He = 1.0386kgdifference in weight (buoyancy) between 1m^3 of Air and He+aerographene = 1.045256kgTherefore hydrogen gas has 1.1157/1.0386 = 1.074234 times (7.4% more) the buoyancy (lifting power) of helium and He+aerographene mix has 1.04525/1.0386 = 1.006402 more buoyancy than pure helium - just over half a percent more lift!
Balloons: Do we have the technology to build "safe" hydrogen filled airships?
What do you mean by "safe"? Hydrogen will always carry an element of danger, because it's highly flammable. If it mixes with air and finds a spark, it will ignite, and there's no way around that. Now, we might be able to build a safer airship than the Hindenberg, by use of better materials and better designed balloons (with internal compartments to reduce leakage, for example). The question is why we would want to. We have airliners that are much faster, more efficient and at least as comfortable as an airship would be. Airships are big, ungainly beasts with huge amounts of air resistance. The only advantage they have over airplanes is their hovering ability, and the only thing that's usually good for is advertising blimps. Zeppelins may look cool, but they're far too inefficient and expensive to be practical in modern times.
How to make the fuel for Sky Lanterns?
I've read on the net that it is just tissue paper with candle wax, but how exactly to make the fuel? And what paper is used in the construction of the lantern? Is Japanese paper ok?
What should you do with a laptop battery that looks like it is going to explode?
When I pulled out my netbook after not using it for a long time, I found that the battery was very inflated, almost like a balloon. I don't remember it being that inflated before, and I am afraid it may explode and cause a fire. So I put it in an airtight container and placed it outside in my backyard in the most fireproof and open area I could find. The container, however, was made of plastic, so I was still concerned. That's why I placed a large pot over it and weighed it down with bricks, so that, if it explodes, perhaps it will be contained, and the lack of oxygen would keep it from burning any longer. Can someone please explain what I need to do next, or if I am doing anything wrong? Is there anyone I need to call? If so, who? I would like to have this problem dealt with as soon as possible. Thank you in advance for answering.