can we blow a balloon up under water?
538859
When one is swimming under water,it`s easy to view bubbles from your mouth or nose.If it`s possible for the formation of bubbles then it`s possible to blow a balloon though the outward pressure exerted by the balloon will be imence compared to the inward.You can still succeed if you use a good electric pump.
282829
This is similar to asking why gravity doesn't affect boats. It does, but buoyancy keeps them above water. Similarly, if you push a hollow rubber ball down to the bottom of a pail of water and simply release it, it will pop back up to the surface.\nThe helium balloon is just being pushed up by the relatively higher air pressure under it. See the sources for a detailed calculation and a diagram of the pressure situation.
809952
if your balloon were super super to the highest level so so so so so so so so so so so so so so so very very very very very strong.... as in... that it would survive at like zero pressure, your helium filled balloon would reach the outer space...\notherwise, it would'nt even reach the middle of the atmosphere..
629282
assuming the balloons are spherical and have no mass and the temperature is about 25 C then 418 balloon might just do it.
810879
The problem is not the weight of the water, it's the drag of the fluid. Unless you can find some magic way to eliminate the drag in a fluid like water which is so much more than that of a gas, you will be stuck with lower speeds. Even if you had some "magic" bubble around the sub, you would still need to displace the liquid to move the bubble.
147395
A gas burner heats air inside the balloon and as the air becomes warmer it becomes less dense or lighter per unit of volume, compared to the surrounding air. The differance in the two air densities causes the balloon to float like a cork in water.  This is the reason balloonists launch their ballonons in the early morning when the air tempature is cooler.  The cooler the  outside air the less heat is needed in the balloon to get it off the ground saving fuel for a longer flight.
722042
no we can not cry under water unless you want to cry drowning.  Crying requires breathing.
702842
In all honesty, I don't think it's possible as the ball is pressurized.  Maybe a direct hit of a sharp object would cause the ball to deflate and not "burst."\n\nHope this helps.
579844
crush it and put it in water
898627
The idea is that the increase in hydrostatic pressure of the water will cause a decrease in volume of the balloon. You are told that the temperature of the ballon is constant so that you can make the assumption PV = constant = Pa Va, where Pa Va are the pressure and volume at atmospheric conditions.\n\nThe bouyant force is simply the weight of water displaced, and therefore is it proportional to the volume of the balloon. You can assume that the water is incompressible and therefore constant density.\n\nSo, saying that the bouyant force is 1/2.4 of the surface value means that the volume has decreased to Va/2.4.\n\nPa Va = Pb Vb; Vb = Va/2.4 --> Pb = 2.4 Pa.\nRemember that this means absolute pressure.\nThe absolute hydrostatic pressure in the water is:\nPw = Pa + (rho) g h\nwhere h is the depth below the surface.\nSo: 2.4 Pa = Pa + (rho) g h\nh = (1.4 Pa)/((rho) g)\nPa = 101 000 N/m^2\nrho = 1000 kg/m^3\ng = 9.8 m/s^2\nh = 14.4 m
995264
do something horrible like throw water balloons filled with bleach or something.....
438161
Send down a SCUBA diver to look!  Just kidding.  Your idea to pump out the well and see what happens sounds good.  If you have a camcorder, you could tie it to a rope and lower it to the bottom to have a peek like in the movie Volcano.
965619
buoyancy forces are what cause a balloon to rise whether in water or air.  buoyant forces are proportional to the density of the media being displaced.  water, having a much higher density than air, when displaced produces a greater rising force on the balloon, ergo the balloon moves faster.  air, having a higher density than helium, when displaced also produces a greater rising force on the balloon, ergo the balloon still moves but slower than in water.
1106663
The question is not clear. If a bottle of hot water is attached to the mouth of a balloon, the steam will enter into the balloon. The volume of steam will not be sufficient to inflate the balloon. If at the same time, the water in the bottle is boiled by heating over a flame, there are chances to inflate the balloon. The balloon starts to inflate when the water in the bottle reaches 100 degree centigrade.
1013381
This would be an awesome inexpensive experiment. as I believe that it does with respect to the diameter of the bubble gravity attraction should be increased with respect to surface area, however this experiment should be conducted in an environment free from draft and circulating air flow.
971232
yes,put some sellotape on the balloon first.
1070726
If it is well controlled, yes.  If not, you are at serious risk for a lung injury.\n\nHere is why.  Asthma is an inflammation of the breathing passages.  This reults in anrrowing and can result in air being trapped (at leats for a short period of time).  At constant pressures, no problem.  But when diving the ambient pressure changes.  \n\nIf you filled a ballon half way full at 30 feet depth, when you surfaced the ballon would be fully inflated.  (The reverse is true as well).  The problem is what if the air inside a trapped space doubles in volume - it has to go somewhere.  Barotrauma is the result.  The ability to equalize these pressure is essential to SCUBA diving -- be it the lungs, inner ear or sinus.\n\nOne other wrinkle: SCUBA can trigger asthma.  Some asthma seems to be initiated by breathing in a bit of salt water (unlikely, but it could happen) or by exercise (like kciking against a current).  \n\nMy advice:  Consult with a doctor familiar with diving physiology. and your clinical history.