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Balloon Question

KK

KK

Lifer
Say you have a helium balloon in a vehicle and slam on the brakes, which way should the balloon go?
 
Contrary to belief, a helium-filled balloon does have mass...

I can't believe some people, they think that if you fill a tank with helium it'll get lighter.
 
It wouldn't go anywhere, because there is no indication that the car was moving. You can slam on the brakes all day long in a parked car, won't make anything move but the brakes. Now if the car is moving, it depends on which direction it's moving. 😉
 
Backwards.

Imagine a tank in the car, nearly full of water, with a boat floating on top. Hit the brakes. The water would slosh forward, encouraging the boat to move backward.

In this case, I think the mass of the balloon would be negligible, given that the entire thing is buoyant.



Originally posted by: KillerCharlie
Contrary to belief, a helium-filled balloon does have mass...

I can't believe some people, they think that if you fill a tank with helium it'll get lighter.
Click to expand...
Was the tank filled with air previously, or with a vacuum? To what pressure is the tank filled?

If the tank was previously filled with air at 1 atm, and that air was replaced with helium at 1 atm, I would expect it to be lighter. Now if the tank were completely evacuated before, and then filled with helium, then it would be heavier. Similarly, if the helium were pressurized (most likely), this would introduce much more total mass, and would also increase its density. Result: more weight, and no chance of buoyancy.

 
The balloon would not survive, cause I am gonna inhale all the helium then call chicks on my cell phone and have phone sex. :thumbsup:
 
Originally posted by: KK
The car is moving forward, Barometric Pressure is 30.01, windows are up, moon is full.
Click to expand...

The balloon will move toward the rear of the car.
The air molecules will continue forward causing a pressure drop in the rear of the car.
The balloon will move into the lowest pressure area.

And I clicked forward by mistake on the poll😱
 
This is confusing. If both the balloon and the car are moving, and the car stops, won't the balloon keep on moving until it hits something?
 
Originally posted by: Newbian
It's like when there is a fly in your car and if you increase the speed will it be able to keep up. 😉
Click to expand...

I hate it when things aren't in a vacuum. Makes it so confusing -_-.
 
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