2007-02-14 02:27:17 · 7 answers · asked by Anshu 1 in Science & Mathematics ➔ Physics
it is not the string that was cut made it come down, it is when the lighter air/gas filling the balloon exhausted, then the inner and outer air equalized. the weight of the rubber container pull it down through gravity action. it is not the string.
2007-02-14 02:40:59 · answer #1 · answered by komatsu 2 · 0⤊ 0⤋
Because when strings are not cutted then there is a gas in them which is much lighter like helium, etc. but after cutting the string the gas goes of, due to which baloon comes down.
2007-02-14 03:16:58 · answer #2 · answered by Honey 2 · 0⤊ 0⤋
Which one comes down? the string or the baloon? If you mean the 'string' , it is due to gravity. Of course, if you had tied the mouth of the baloon with a string to seal in the gas, and if you cut the string such that the mouth of the baloon opens, then the gas escapes from the baloon, both the string & baloon have to come down due to gravity.
2007-02-17 02:45:19 · answer #3 · answered by Govinda 3 · 0⤊ 0⤋
it is a simple exercise to understand the basics of relative density.
the density of gases are lot less compared to solids. Further we use heated gases in filling balloons. This enables the gas to expand further and hence become even less dense. Use the equation of density = mass/ volume. mass being a constant property in this case, whence you increase the volume, the gas tends to lose density.
Also, we need to keep tag of pythagoras' theorem which states that a substance tends to float in a medium , when the mass of displaced fluid exceeds it's own mass.
take the case of an air filled balloon, Here the expanded balloon tends to displace more air from atmosphere than it's own mass.hence the balloon floats and ascends in air.
However, upon releasing the air(as is achieved upon severing the strings) or upon cooling the air inside the balloon(e.g. when the balloon ascends upwards into the atmosphere and acquires colder climes), the balloon shrinks and gradually fails to displace enough air to exceed it's own mass.
Hence it gradually sinks down.
Hope that sates your query?
2007-02-14 02:43:18 · answer #4 · answered by dlordoftherings 2 · 0⤊ 0⤋
gas filled balloon have helium gas in it which is really light and always goes up. ( even stars have helium in them) its not the ballon that is goin up its the gas which is goin up and forcing the balloon to go with it. so when u cut the string, u r realesing all the gas and hence the balloon comes down... got it?
2007-02-14 06:11:51 · answer #5 · answered by jello 2 · 0⤊ 0⤋
Um...the strings are more buoyant than the balloon?
Is this a trick question? I can't see how this could happen.
2007-02-14 02:31:30 · answer #6 · answered by gebobs 6 · 0⤊ 1⤋
it has to do with the equalibrium of the object, where the gases are seeping out because it's not level.
2007-02-14 02:31:33 · answer #7 · answered by Falcon Man 3 · 0⤊ 0⤋