How does buoyancy work?

H ow do you define 'pressure differential of the surrounding atmosphere'?

Like starting an upside-down siphon, almost.

Again humor has been achieved.

That's one of those laws of nature that seems to 'cause' things to happen as if they understand the law.

Progressive laws and sustainable technology. Ass backwards.

Ever see that detective show about the UK Underground fire that killed

They discovered a lot about how fires work in enclosed 'trenches' or 'raceways'.

Hummm..... depends on how deep. I'm pretty sure if you submerge an ordinary ping-pong ball deep enough, it will never submerge. Pressure would eventually crush the ball into a tiny blob of whatever ping-pong balls are made of - likely letting the air out i n the process. Or, the ball ruptures and fills with water.

When they were so ecstatic about the video of their "discovery" of particles glomming together "in space", in a baggie on the space station, I wondered if they considered the fact that there would also likely be an electrostatic effect working.

so now you want to discuss viscosity?

no it won't. friction in the cold chimney will reduce the flow. also the lower air pressure at the higher fireplace will hinder combustion slightly.

that can probably be made to work.

long

Let's stay within the confines of normal atmospheric pressure and temperature. Just considering the effects of gravity, of course, on the moon the ball weighs less, but so does the water, and by the same proportion. The sinking is therefore the same.

An interesting case to think about is what would happen in perfect weightlessness: What's the final state if a free floating blob of water touches a free floating ping pong ball? (Hint: Surface tension reigns.)

Jeroen Belleman

long

Ahh, so on the surface of Jupiter, it would sink completely! Oh...

kerplop.

Unless the ping pong ball is coated with RainX.

not

water

to

of

been.

then

balance

long

I am not sure but i suspect what is called a gravity ventilator may what you are asking for. Something that may be what you are after.

?-)

It will still float if the material is less dense than water, which may well be the case although I'm not sure either way (wish I had a ping-pong ball I could test that with). Some common plastics *are* less dense than water.

ball.

long

Or even better:

Pimpom schrieb:

Hello,

but we are talking about solid plastics, no foamed plastics with gas filled bubbles inside. If the density is less than the density of water, it will float, if the density is larger, it will sink.

Ping-pong balls are made of Celluloid which seems to have a density of about 1.67. If they are crushed and filled with water, they will sink.

Bye

FAR OUT!!!

I wonder if the Earth were coated with that if we would not have a Moon right now, 'cause the impactor slid right past...

Polyethelene and polypropylene are the only ones that come to mind.

That's it! If we go coat Apophis with it, it will just slip right by!

Ignoring gravity gradient effects, isn't the simple buoyant rule that a floating object displaces an amount of water equal to the object's weight? ...Jim Thompson

I guess without gravity the ball will not move in any direction - agree?

So gravity is the main factor to make the ball floating-up

...One now can imagine, gravity's pulling the liquid down better than pulling the ball, hence no room for the ball at the bottom... it must go up to yield the space

In fact all of these factors involve: Gravity, density, viscosity ...