A plane on a runway, how smart is r3vlimited?

[Garageaholic]

There's a big difference between knowing what you're talking about and thinking you know what you're talking about.

[MattE30]

So how many of you guys actually know what you are talking about?

[Garageaholic]

..... and says ouch


dude is your car fixed yet?!

[f u z z]

So a Rabi walks into a bar..

[delatlanta1281]

^ What they said.


Unless you have a 500mph headwind. :)

[Garageaholic]

The plane won't take off because the second that the conveyor belt goes fast enough to generate the required lift, then there will be no force acting on the plane (assuming the engines are off) and it will lightly come back to the ground. It will keep doing this minor up/down motion. A foot off the ground, then fall back on the conveyor belt until it gets back up to speed then starts generating lift.


eaaaaaaaaaaaaaaaaaaaaaasy

[gstuning]

Wouldn´t it be fun if the belt when´t in the direction of the airplane ;)
the wheels would stay still while taking off , now that would be funny looking

[gstuning]

Conveyor belt = earth
of course it will fly,

[joshh]

I just finished the test. It looks exactly the same...of course you already knew this. Next time I'll just look it up on the internet so I look smart....oops too late.

Pretty intresting how "common" sense means nothing with physics. Still intresting to try figuring out without doing the test.

[george graves]

If that's the case then it's a trick question (in a way) and it's ment for those that like to argue semantics (How big of a piece of ice compaired to the glass). Of course a portion of the ice will stick out of the water, it has less mass than water. That goes without saying. And if that's the case, you have to know it's exact mass and waters mass otherwise it's a total guess as to how much water the ice is displacing.

But frankly it doesn't matter if it floats because it's still going to melt. All of it.

So if we add in the "floating" factor there will be more water and it will be more.

There I go thinking way too far into it.

Nope - it does not matter the amount of ice or the amount of water, or even the shape of the container. (except to say that the ice MUST be floating - none of it can be touching the bottem or getting an upward support from the sides)

...

[Borat]

Water stays the same level.
The ice displaces the same amount of water equal to its mass. Since when it melts it will be the same volume as the water it previously displaced the water level will remain the same.

Makes you wonder if global warming will cause sea level rise as bad as they say.

FWIW ice doesn't expand due to air. Its due to hydrogen bonding that ice is simply less dense than liquid water.

Anyway, enough science for one day

[joshh]

Doh, I was thinking wrong to begin with...if water expands when it turns to ice then technically it would "shrink" when it melts...but since some of the ice is out of the water and it melts.....UGH!
I'm doing the test already....lol.

[joshh]

But you are forgetting about the little bit of ice poking out of the top of the water (because ice floats).

I'm with Justin. I think the water will stay the same level.

-Erik

If that's the case then it's a trick question (in a way) and it's ment for those that like to argue semantics (How big of a piece of ice compaired to the glass). Of course a portion of the ice will stick out of the water, it has less mass than water. That goes without saying. And if that's the case, you have to know it's exact mass and waters mass otherwise it's a total guess as to how much water the ice is displacing.

But frankly it doesn't matter if it floats because it's still going to melt. All of it.

So if we add in the "floating" factor there will be more water and it will be more.

There I go thinking way too far into it.

[tonytony]

the water will stay the same level, i've done this expirement.

[erik325i]

Water expands when it freezes. So I'd have to say the glass would be a tad less after it melted.

But you are forgetting about the little bit of ice poking out of the top of the water (because ice floats).

I'm with Justin. I think the water will stay the same level.

-Erik