You have a box with a big helium ballon inside, so big it touches all 6 sides of the box.....

[funboy6942]

Would the scale, at the time with the ballon inside filled with helium, register the weight of the ballon and the box, or, just the weight of the box till the ballon either deflates or pops and the ballon material falls to the bottom of the box?

Would the box weigh less with the helium ballon inside or the same as if the ballon is not even in there? Or like asked above, even though it is filled with a helium ballon, the box registers on the scale the weight of the ballon and the box combined with the ballon filled with helium or not. The weight is just the same as if it was poped or filled with air from my lungs.

We be talking a scale that can register if you breathed on it, so it is a very sensitive scale.

 

[Jeeebus]

are there crows flying anywhere in the vicinity?

 

[funboy6942]

Originally posted by: Jeeebus
are there crows flying anywhere in the vicinity?

Nope no crows. Just one big ass box with a big ass ballon filled with helium.

 

[ViviTheMage]

do you guys have answeres to these stupid questions, or are you just pulling them off your ass?

 

[Ika]

The box would weigh the same as if the box itself was filled with helium and the completely deflated balloon were sitting atop the box.

 

[rivan]

Is this an aviation grade scale? And are the above mentioned crows laden or unladen? Is the balloon tied into the shape of a mammal? Is the clown that tied the balloon also in the box?

I'm getting a little sick of these silly posts. If you're going to ask a question, please give us all the information we'll need to answer it properly.

 

[Brainonska511]

Since weight is a force, and the helium balloon is buoyant in air (therefore having an upward force on it, counteracting the downward force of weight), the box would weigh less than if the box was empty.

If you were going for mass, it should be the mass of everything on the balance.

 

[funboy6942]

Originally posted by: rivan
Is this an aviation grade scale? And are the above mentioned crows laden or unladen? Is the balloon tied into the shape of a mammal? Is the clown that tied the balloon also in the box?

I'm getting a little sick of these silly posts. If you're going to ask a question, please give us all the information we'll need to answer it properly.

I LOL at your reply but I thought I had given all the info. Its a box, big ballon so big it touches all the sides of the box when closed, it is filled with helium so if not in the box it would float away.

I dont know what kind or brand of scale but it will register the weight of a hair so it is very precise

 

[randay]

the scale would read the wieght of the box + wieght of the balloon - lift provided by the helium in the baloon.

 

[DrPizza]

Air provides a small amount of buoyancy. Generally, the amount of buoyancy is completely insignificant. In the case of your problem, it's the most significant part of the problem. The weight of an object is generally thought of as the gravitational force of attraction between the earth and the object. If you put a bathroom scale on a 45 degree incline and stand on the scale, you'll note that it doesn't register the same "weight" - what it in fact registers is the magnitude of the normal (or perpendicular) force against the scale.

Now, Find something that floats in water. Would you say that it has "no weight"? Or, would you say that the buoyant force of the water conteracts its weight?

Here's another mental thought experiment for you. Take an uninflated balloon... put it in the water. (I think they sink if there's no air in them at all) Now, if you fill the balloon with water, it'll sink (or float) exactly the same way it did when it was empty. The water inside doesn't change its buoyancy in water, because, well, it's water. Now, replace that water with oil. That balloon is going to bob right up to the surface. This is the same scenario as the box with helium vs. the box with air. Helium is far less dense than air. Well, except that in this latter case, the buoyant force of the air on the box and helium probably isn't enough to make the helium box float off into the wild blue yonder.

 

[funboy6942]

Originally posted by: DrPizza
Air provides a small amount of buoyancy. Generally, the amount of buoyancy is completely insignificant. In the case of your problem, it's the most significant part of the problem. The weight of an object is generally thought of as the gravitational force of attraction between the earth and the object. If you put a bathroom scale on a 45 degree incline and stand on the scale, you'll note that it doesn't register the same "weight" - what it in fact registers is the magnitude of the normal (or perpendicular) force against the scale.

Now, Find something that floats in water. Would you say that it has "no weight"? Or, would you say that the buoyant force of the water conteracts its weight?

Here's another mental thought experiment for you. Take an uninflated balloon... put it in the water. (I think they sink if there's no air in them at all) Now, if you fill the balloon with water, it'll sink (or float) exactly the same way it did when it was empty. The water inside doesn't change its buoyancy in water, because, well, it's water. Now, replace that water with oil. That balloon is going to bob right up to the surface. This is the same scenario as the box with helium vs. the box with air. Helium is far less dense than air. Well, except that in this latter case, the buoyant force of the air on the box and helium probably isn't enough to make the helium box float off into the wild blue yonder.

Well thank you mister wizzard Now I had a reply in my crow thread where as the crows are flying in the box, he claims the scale will still register the weight of the box and the birds even if they are flying or laying dead in the box. Care to eliberate on how that can be if the birds are flying in the box, attached to the bottom of said box with a string, flying, trying to reach the top of the box

 

[AnandTech Moderator]

OP, you have reached your yearly limit for stupid hypothetical threads. Like a water spaniel with a stick, you simply don't know when to stop, do you? Don't post another, please.

 

[funboy6942]

Originally posted by: AnandTech Moderator
OP, you have reached your yearly limit for stupid hypothetical threads. Like a water spaniel with a stick, you simply don't know when to stop, do you? Don't post another, please.

Awe man. I make 2 of them in the 6 years I been a member and pops tells me to quit

<shrugs his sholder-shuffles feet> Im sorry dad, wont hapen again.

 

[randay]

the yearly limit is 2 then i guess, it really should be 1!

 

[AnandTech Moderator]

Originally posted by: funboy42

Originally posted by: AnandTech Moderator
OP, you have reached your yearly limit for stupid hypothetical threads. Like a water spaniel with a stick, you simply don't know when to stop, do you? Don't post another, please.

Awe man. I make 2 of them in the 6 years I been a member and pops tells me to quit

<shrugs his sholder-shuffles feet> Im sorry dad, wont hapen again.

We left BOTH of your nef posts open, but that wasn't good enough for you, was it?