Into the atmosphere. I understand that, being a very light gas, the helium would gradually diffuse into outer space.
More than likely a Helium filled balloon. A Hydrogen filled balloon is very flammable and might burst into flames similar to the Hindenburg blimp/dirigible. Helium is not flammable.
Helium is lighter than air, so it makes the balloon float. If you let go of the balloon, it will float up into the atmosphere because of the difference in density between the helium inside the balloon and the air outside.
In space, the helium inside the balloon will expand due to the absence of atmospheric pressure. Eventually, the balloon will burst when the pressure inside it becomes greater than the tensile strength of the balloon material.
a helium balloon is forced upward by buoyancy. a object is forced upward by a force equal to the weight of the fluid it displaces. this also applies to gases. the gas helium is lighter than average atmospheric air, that is that equal volumes of atmospheric air and helium do not weigh the same. This means that the volume displaced by the balloon is heavier than the balloon itself. since the air weighs more it applies more force upwards on the balloon than the balloon applies downwards on the air, therefore it rises. However, a helium balloon will not go down unless a force such as large air resistance (heavy wind etc.) is applied to it. hope this helps.
Helium is less dense than air, so a balloon filled with helium is lighter than the same volume of air. This buoyancy force allows the helium-filled balloon to rise. On the other hand, a balloon filled with air has the same density as the surrounding air, so there is no buoyant force to make it rise.
Helium is lighter than air, therefore it rises upwards.
Air or helium is a gas that is contained in a latex envelope. Since the balloon is a finite space, when you sit on it you strain the latex beyond it's capabilities. Just like a seam in your clothes, too much strain will open the material. In latex, the thing pops because the pressure outside is greater than the pressure inside. The gas has to go somewhere!
A combination of heat from the sun and the lower pressure of the surrounding air the higher you go, causes the gas in the balloon to expand. Along with the sunlight weakening the balloon material, it will burst.
A 30cm balloon (fairly standard party balloon) holds about 8 liters of helium at 1 atmosphere and weighs itself around 3 grams (latex) on earth. 8 Liters of Helium would weigh about 1.4 grams at 1g. So a balloon would weigh in at 3 grams plus 1.4 grams times .16 (the gravity on the surface of the moon) or .7grams. Of course, the whole experiment would be moot since lacking an atmosphere, your balloon would very instantly expand and burst once you exposed it to hard vacuum. But assuming your party balloon was made of some very SUPER latex, well then... there you go. Alas, note also that even the super latex wouldn't help to make it fun, since, lacking any atmosphere to be bouyant in, even your very very light balloon would still drop like a rock at a little bit over five feet per second per second just like everything else on that airless world.
A helium balloon floats because helium gas is lighter than air. By filling a balloon with helium, the balloon also becomes lighter than air. The helium balloon floats for the same reason that objects float on water: objects less dense than water are pushed up by buoyant forces equal to the weight of water displaced by that object. What happens in water also happens in air, and the helium balloon is pushed upwards by a force equal to the weight of air it displaces.
It depends what type of gas it is. With air inside a balloon will just stay still, will be easy to lift and when you kick it like a ball it will slowly go up and then come back down again. If you have helium in a balloon, the balloon will try to go to the highest point it can get, if you go outside and let go of a balloon it rise and go far above the clouds until the balloon starts to wear out so the helium starts to slowly come out so the balloon slowly comes down.
the balloon with air will fall first because air is more dense than helium.