No it decreases
When air inside a balloon is heated, the molecules move faster, causing the air to expand and the balloon to inflate. The total mass of the air inside the balloon remains the same, but the density of the air decreases as it becomes less compact.
Neither, it just stays submerged, provided its density stays the same as the water around.
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.
The density of water molecules is the same inside the balloon as on the outside.
When a balloon is heated, the air inside the balloon expands and the molecules move faster, increasing their kinetic energy. This results in a decrease in mass density, as the molecules are more spread out. However, the total mass of the air inside the balloon remains the same.
As the gas sample in the balloon is heated, the gas molecules gain more kinetic energy and move faster, causing them to spread out and occupy a larger volume. This results in a decrease in density since the same amount of gas now occupies a larger space.
Because air is not as dense as helium filed gallons so they won't float
Hydrogen is less dense than air, ergo it floats. Air is of the same density as air, but the rubber skin around it makes it more dense, ergo it sinks.
The answer is both balloons have the same density, becasue whatever the shape of the object is, the density will always be the same for example: the density of 200 ml of water and 10 ml of water both has the same density 1 g/ml. another example/experiment: if you get a potato and put the whole potato in water it will sink. if you cut a tiny little piece of the potato and put it in water it will also sink. this is becasue both of potato have the same density!!!!!! hoped this helped =]
I am not sure what you mean by 'depend' (please try and make your questions clear) but if you mean does the fact that a helium filled balloon will float (or rise) depend on gravity? Then the answer is Yes. if you were to take a helium filled balloon to the space station and release it inside, it would not rise, it would behave just the same as if you released a bunch of keys.
when a balloon is filled up with air and then heated. remember that the particles of air are free to move. so when it is heated the particles will gain more energy and they stars to move faster. when there is too much energy between the particles they escape by popping the balloon. the more heat the more faster the particles move. it wil be the same process if the ballon is filled up with water and then heated.(water and air particles are heated up by convection currents.) if you heat just a ballon then the ballon will melt because of the property of the meterial it is made of. hope i helped:)
No. At the same pressure, a helium filled balloon will be less dense than an air-filled balloon.