Physics Question

What's stell?

my guess would be that the latex or whatever the balloon is made of is lighter and less dense than stell. of course, not knowing what stell is, i can't say definitively

sry typo.. i meant steel

Wow

Physics Question wrote:

Here is a question...

A stell tank filled with helium gas does not rise in air, but a balloon containing the same helium rises easily. Why?

The steel tank does not rise because the weight of the air displaced by the helium filled steel tank is less than the weight of the helium filled steel tank itself.

The weight of the air displaced by the helium filled balloon is greater than the helium filled balloon, and therefore, it floats.

maybe if you had an extremely thin layer of steel as your ballon material and it had a gigantic volume, then it would rise.

how about because a balloon is lighter? what the hell is the point of physics if crap like this is all you learn?

....If you fill a tank with helium, it's still a f***ing tank. Just being filled with helium isnt going to make it rise. Think about the gas to mass ratio of a tank filled with helium and then that of a balloon......difference

If an object is less dense than air, it rises. If an object is more dense than air, it doesn't. That is unless it's on a treadmill. Then the plane will take off while the car rotates forward as it falls off of the cliff taking the steel tank and the helium balloon with it.

For Christ's sake, a plane on a treadmill WILL NOT get airborn. There is no lift. It's like trying to go hangliding with no wind.

Ok, at the risk of starting the whole argument over again, a plane takes off because of it's movement through the air, not it's movement over the ground. What is happening under the wheels doesn't matter, the plane is still moving forward, thus the wings (moving forward) are getting lift against the air (stationary).

I concur.

My god you are stupid. THE PLANE IS NOT MOVING THROUGH THE AIR ANY MORE THEN A PERSON RUNNING ON A TREADMILL IS MOVING FORWARD!

Jesus.

Oh no... here we go again...

xbcha1 wrote:

My god you are stupid. THE PLANE IS NOT MOVING THROUGH THE AIR ANY MORE THEN A PERSON RUNNING ON A TREADMILL IS MOVING FORWARD!

Jesus.

Maybe this is part of the joke... but Joe Schmoe said it wouldn't take off.

xbcha1 wrote:

My god you are stupid. THE PLANE IS NOT MOVING THROUGH THE AIR ANY MORE THEN A PERSON RUNNING ON A TREADMILL IS MOVING FORWARD!

Jesus.

Haha, we assume you're joking, but just in case you're not, you don't seem to realize that yes, the plane would be moving forward, much UNLIKE a person on a treadmill. The wheels provide almost zero resistance, as they are there to actually REDUCE friction with the ground and allow the engines to propel the plane forward.

My apologizes if your post was tongue in cheek.

He wrote stell. A tank made of stell. When you saw that, did your brain not automatically correct it for you, as "steel"? If not, work on it, and don't type back stupid, obvious questions.

congrats to the only

Running Brave wrote:

Physics Question wrote:

Here is a question...

A stell tank filled with helium gas does not rise in air, but a balloon containing the same helium rises easily. Why?

The steel tank does not rise because the weight of the air displaced by the helium filled steel tank is less than the weight of the helium filled steel tank itself.

The weight of the air displaced by the helium filled balloon is greater than the helium filled balloon, and therefore, it floats.

congrats to the only good answer & explanation

xbcha1 wrote:

My god you are stupid. THE PLANE IS NOT MOVING THROUGH THE AIR ANY MORE THEN A PERSON RUNNING ON A TREADMILL IS MOVING FORWARD!

Jesus.

The runner on the treadmill is not moving forward.

The car on the treadmill is not moving forward.

The airplane on the treadmill IS moving forward. It will take off.