quick puzzle.

[gcol]

ok the level will fall as the displacement of the brick in the water is less than the weight it would displace when in the boat

OK so big-all was the first to get it...... although second time round.

 

[big-all]

i think it would be more interesting if it was a fisherman in a boat for a six h fishing marathon with 12 cans of special brew and a vindaloo on a hot day

and as for the origional equasion we forgot about evaporation atmospheric pressure input from any source drainage
and of course the bricks porousity

 

[gcol]

Hmmm. So we can assume that whatever fluid leaves the boat will be pretty much water so the level will be the same. If there's some sick, then it's about 50/50 - some floats and some mingles in with the water, so again the level will be the same. If it's a particularly good vindaloo then he may need to .... erm.... well go - assuming it's a proper vindaloo then it'll vapourise upon leaving his bum so the water level will rise.

Jeeezus the dog's just farted.

 

[ban-all-sheds]

"a body immersed in water will displace a volume of fluid that weighs as much as the body would weigh in air"

That can't be right, surely? What bearing does the weight of the article have on the volume of liquid it displaces?

You mean 'mass', right?

OK - what bearing does the mass of the article have on the volume of liguid it displaces?


(You may assume that the article is not made of collapsed matter)

Edited for typo

 

[big-all]

"a body immersed in water will displace a volume of fluid that weighs as much as the body would weigh in air"

That can't be right, surely? What bearing does the weight of the article have on the volume of liquid it displaces?

You mean 'mass', right?

OK - what bearing does the mass of the article have on the volume of liguid it displaces?


(You mau assume that the article is not made of collapsed matter)

as long as the mass is greater than the water so it dosnt float ---------nowt at all

 

[ban-all-sheds]

You mean density....

 

[big-all]

You mean density....

you calling me fffick

yes of course density

 

[Spark123]

Isn't it something like the upward force on an object is equal to the weight of the water displaced? When the brick is in the boat the boat can displace enough water to keep it afloat as the upward force (displacement of water) can overcome the downward force (weight). The boat displaces the bricks weight in water which as the brick is heavier i.e. more dense than water more volume of water than the volume of the brick will be required to keep the brick afloat. When the brick is thrown overboard it sinks and only displaces its volume.

 

[Softus]

OK - what bearing does the mass of the article have on the volume of liguid it displaces?

A buoyant object will displace whatever volume of water has the same mass as the object. Whilst in the boat the object is classed as buoyant.

 

[big-all]

Hmmm. So we can assume that whatever fluid leaves the boat will be pretty much water so the level will be the same. If there's some sick, then it's about 50/50 - some floats and some mingles in with the water, so again the level will be the same. If it's a particularly good vindaloo then he may need to .... erm.... well go - assuming it's a proper vindaloo then it'll vapourise upon leaving his bum so the water level will rise.

Jeeezus the dog's just farted.

yes yes

i just think so many of these challenges are very finicky with so many variables and egnore so many more
and are fairly pointless as you cant rely on common sence with the equation as they only take the points that fit there distorted equation

 

[kendor]

Does it depend on the weight of a dry brick in air compared to the weight of a water laden brick?

 

[Softus]

Is that a brick that's been injected with a chemical DPC?