Re: Here's a puzzle for you.
Re: Here's a puzzle for you.
The one in the tank with 40 degree water.
Re: Here's a puzzle for you.
the colder water would be denser
Re: Here's a puzzle for you.
Duuuh! Water freezes at 32ºF (for the luddites who still use stone age units), so 30ºF is below freezing.... ::) ::) ::) A brick isn't going to sink very quickly through ice is it...?
The density of water remains pretty much the same between 1ºC and 99ºC, reducing a bit when it reaches solid phase (freezes), and substantially more when it reaches the gas phase (steam).
Re: Here's a puzzle for you.
You haven't said anything about pressure - so - assuming a smidge above sea level...
30 F = -1 C
In other words ice. The brick will not sink - but sit on top the ice - assuming the water hasn't been super distilled - in which case - under certain circumstances - the water won't turn to ice...
40 F = 4 C
Assuming the above mentioned pressure caviats etc - water is liquid at this temperature - therefore the brick will sink.
Interesting to note however - that at 4C specifically - water reaches its highest density... higher than water at 3C or 5C
Or put another way - the brick will sink faster at 3C or 5C than at 4C
Re: Here's a puzzle for you.
Assumng that the tanks are open to atnosphere at sea level and are pure water:
Scotty is right. The water in the lower tank would be frozen!
Here is a headache inducing one:
If you drop two identicle dimension spheres, with the same surface finish and dropped from the same height. One shhere is of a heavy material (say iron) the other of a light material (say wood).
Experement has shown that the wooden one will hit the ground first.
Why??
Re: Here's a puzzle for you.
Quote:
Originally Posted by Jon_W
Here is a headache inducing one:
If you drop two identicle dimension spheres, with the same surface finish and dropped from the same height. One shhere is of a heavy material (say iron) the other of a light material (say wood).
Experement has shown that the wooden one will hit the ground first.
Why??
I'm struggling.
The full force formula applied to all 3 pairs of bodies gives a net acceleration of the Earth (in 1/r^2) biased towards the heavy ball. The force between the balls give a component to each of them in the direction of Earth (in 1/r^4), biased to the light ball.
Without more detailed analysis (and detail on the setup) seems to me the 1/r^2 would trump the 1/r^4 and the heavy ball would touch down first!
Re: Here's a puzzle for you.
Quote:
Originally Posted by Jon_W
Assumng that the tanks are open to atnosphere at sea level and are pure water:
Scotty is right. The water in the lower tank would be frozen!
Here is a headache inducing one:
If you drop two identicle dimension spheres, with the same surface finish and dropped from the same height. One shhere is of a heavy material (say iron) the other of a light material (say wood).
Experement has shown that the wooden one will hit the ground first.
Why??
You attached the iron one to a bungee cord? :-/
Re: Here's a puzzle for you.
dropped at the same time?
oh and water at 30F is definitely denser as ice is frozen water