which balloon can someone inflate easier an empty one or a partially inflated one?
352630
partially inflated one. firstly, because the rubber gets stretched, but if this is for a science class, the answer is that, opposite to what most people think, the pressure inside a large sphere is less than that inside a small sphere. if you blow up two identical balloons, blow one up to be larger than the other, then hook them  together with a piece of tubing, the little one will deflate to nothing and pump up the bigger one. (It's because the stress from the surface depends inversely on the curvature; the more the surface is curved, the bigger the stress, as you can understand when you try to bend something. bigger sphere has flatter surface than smaller sphere.)
240987
put the opening of the balloon on the spigot of the helium tank.  they are usually made of rubber.  when you tip the spigot to one side, helium comes out.
1044988
Hi \n\nI found it here\n\nhttp://www.giftlog.com/aa/kangaroo_inflatable.htm
469382
depends on the time of day. During a hot day the air balloon would pop first because air heats up juch faster than water. at night the air balloon would actually shrink because the air in the balloon would contract because of the cold air.
86606
The size affects the "floatability" of a ballon, because there is a larger percentage of "lighter than air" material inside the balloon pushing it up than the weight of the balloon's skin pulling it down.
289279
the mixture of a baking soda and vinegar creates gases this gases would then inflate the balloon
968061
The volume should decrease because the colder air causes the gas molecules to lose kinetic energy and slow down.  This makes the air pressure in the balloon lower and the balloon's volume is reduced.
43871
There is a popular toy called a rocket balloon.  It is about 40" long and when you release it, it shoots up in the air and then winds it's way down as it slowly deflates while making a loud airplane type noise.  I've included a link to a picture below.  I'm not sure if this is what you're looking for but it's what came to mind.
535624
PV=nRT\n\nas the air is heated the average kinetic energy of the molecules increases. ie P increases.But V is constant. so some gas molecules escape through the bottom. Hence the density decreases and becomes lesss than that of surrounding air.Thus the balloon rises.
270335
There are air tight containers and there are air tight containers.  A birthday party balloon is airtight and ok, an airplane isn't.  Location works the same way.  If you blow up your pop bottle in the middle of a gravel pit, and clean up the mess, probably few people would care.  In someones face would be a different story.  The real worry is what are you going to do next?  \n\nI'd say, in the proper setting, your co2 toy sounds like fun and fairly safe.  Go for it!
1127230
No, it's a nice idea though. As the balloon rises the pressure outside it will drop causing the gas inside the balloon to expand until eventually the balloon will pop. Sorry to burst your bubble as it where; I love the idea of space being filled with these multi coloured balloons though :))
206702
A very large AIR filled Balloon
768769
If r,a are the actual and initial (when it's empty) radius, then the potential energy of the balloon itself is:\n\nE = (C/2)*(r-a)^2\n\nfor some constant C. A simple way to see this is to think of the balloon as a two dimensional network of springs (the potential energy of a spring is V = (k/2)(x-x0)^2) which linearly scale in size as the balloon does.\n\nTreat the air as incompressible at least for a qualitative explanation (consider how difficult it is to blow air into a fixed container (such as a pop bottle) versus a balloon). In that case the guage or net pressure (difference from atmospheric pressure) just comes from the elastic force of the balloon. The relation between the volume of air inside and the radius is:\n\ndV/dr = 4pi*r^2\n\nSo the relation between the energy and the volume of air inside it (which is the same as the pressure (dE = PdV):\n\nP(r) = dE/dV = (C/4pi)(r-a)/r^2 \n= Constant * (1/r - a/r^2)\n\nThis function increases from 0 at r=a to a maximum at r=R=2a, and from there on decreases as the radius increases. The maximum may not occur exactly at 2a, but it probably increases up to some relatively small radius R and then decreases. \n\nIf two balloons are blown up to normal sizes (>R), air should flow from the smaller into the larger. In other words the small one gets even smaller until it goes below (the very small radius) R where the pressure begins to decrease with size.
875895
Find someone with a soccer or rugby ball (local football club?) - it will more than likely have the same fitting. \n\nEven if they haven't got one they will probably know of somewhere you can get it inflated.\n\nFailing that - call your local gym and see if they can do it for you.
155612
With the help of someone who knows a lot about how to handle substances like this, try filling and weighing a balloon or football or something with different gasses and weigh them. Or you could blow something up carefully (always very fun but dangerous) by testing the breaking point of pressure with different gasses. The only problem is that whatever you are filling up must be the exact same for every test (in terms of it's limit with pressure) and you need to pump regular air into a control balloon. Good luck!
331738
A full baloon will weigh more if you are filling it with room air.  The air under pressure will mean there are more molecules in the balloon.  More molecules of 'x' weigh more than fewer molecules of 'x'.
840499
What type of balloons? For balloon designing? balloon twisting? balloon selling?\n\nNot that I know of any but am interested in balloon twisting and will follow this question if that is the info you are seeking...