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Ball in a Hole

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hopefully the little chinese guy at the bottom of the pipe (a.k.a. cylinder) returns your dynamically aimed serve. then no harm no foul. failure to do so will ultimately lead to his watery death!

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Pour water into the pipe until the ball is expelled

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Pretty Obvious. Ive done like 20 versions of the same puzzle.

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A vacuum -neither built up by a vacuum cleaner nor by ex-wives- would not work because it would decrease air pressure as well under as above the pingpong-ball.

Fortunately, ping-pong balls don't need water to float. If there is no water at hand, the goal should be to -at least temporarily- increase air pressure (instead of building up water pressure) under the ping-pong ball.

Assuming that the ball does not wholly seal the pipe: Try blowing against the tube walls! The moving air would follow the tube walls, go down under the ball, building up pressure and lift up the ball. I think it would not need much blower-power, just a little bit more than the amount of air escaping near the ball.

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The trick is that the human body can produce liquid ... just remembered what I drank a few hours ago

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water. you fill the hole with water and the ball floats to the top. come onnn you guys

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Pour water in the pipe until the pipe is full....the ball should shoot up due to water displacement.

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Fill the pipe with water. A tennis ball is full of air and will float on top of the water all the way to the top.

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if the pipe is closed @ the bottom, just fill it with watter and the ball will come up

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there's another brainteaser like this one, but it's a ping pong ball and you're in a sealed room. in that one, they give you all sorts of items, string, sticks, etc. and ask how do you get it out and i like that solution:

PEE IN THE HOLE!!

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I would drink a lot of water and wait to get a real urge to pee. I would then do this into the pipe - causing the ball to rise!

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Fill the hole with water... the ball would pop out of the hole

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I have an answer that is just as simple, but a little more complex to understand WHY it works. First of all, trying to use a vacuum would not work, because it would require air being able to be added below the ball. BUT< some vacuum cleaners have the options to blow. Or, you coulld use a leaf blower. What you do is direct the air stream perpendicular to the top of the hole. (as if you were blowing a bottle like a musical instrument). Then, the increased speed of the air, will reduce pressure, and the tennis ball will rise! This concept is very similar to why airplanes fly. It creates a pressure gradient, and as you might know, things move from high to low pressure, and therefore, it will travel against gravity! (Thank you AP Physics!)

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simple,

Pour water into the Pipe... you will get the solution.

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pour the water in the pipe till the ball float up to the surface.

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i guess you should put some water in the pipe......huh???

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the answer is very simple, since tennis ball is a pumice, i.e., it floats on water, pour water into the pipe and slowly, the ball comes up

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pour water down the pipe

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Fill the pipe with water. Table tennis balls float, it will float to the top.

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pour water in the hole

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Just pour water into the hole and that will make the ball float up.

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I would drink a lot of water and wait to get a real urge to pee. I would then do this into the pipe - causing the ball to rise!

lol which balls r u talkin abt dude ??

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FILL IT WITH WATER, PING PONG BALLS FLOAT.....

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you could also lower in a long item like a piece of wood or metal with double-stick tape on it

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Get a very small person to climb down there and get it, or trained rat.......................

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