Isn't it annoying...

[mailee]

I to think C is the one to use the most water as there is no displacement. As to your Trivia Byron I would have to say Vinnie Jones. :lol:

 

[promhandicam]

I also think that they all require the same amount of water.

Steve

 

[Scrit]

As to your Trivia Byron I would have to say Vinnie Jones. :lol:

Wow! someone who's got Vinnie Jones for a son......

And in answer to the topic heading, "yes"

Scrit

 

[Lord Nibbo]

They would all need the same amount :?:

Cheers
Tony

The prize goes to TonyW as first to post the correct answer :lol: Yes they are all the same :wink:

 

[NeilO]

???? funny bleeding ships down you way LN, they literally float on TOP of the water.....
why isnt there any displacement accounted for?? :?

I demand an explanation :lol:

 

[Nick W]

Because boats displace the same amount of water whether the lock is full or empty.

 

[NeilO]

But LN`s question was:

Which would need the most water to lock up from the lower level to the higher level?

A) A ship that almost fills the lock .
B) A small motor boat (say less than ten tons)
C) No boat at all (they sometimes have to fill the lock when a boat is waiting to lock down)

the answer has to be C.

Laws of Displacement state, that two physical properties CANNOT occupy the same space.

A, by definition the ship being in the lock, has already displaced, say, 60% of the water so would only need 40% of the volme of water to fill the lock.

B, a smaller craft, again would say, displace 25% of the water needed to fill the lock, so only 75% of the lock would be actually water.

C, its all water, so by definition again would be the largest volume of water of the three.

 

[Lord Nibbo]

Sorry Neil your wrong. I knew this question could start an energetic disscusion :twisted:

It's all about displacement as mentioned already.

I'm not going to argue but be assured I'm right. :lol: :wink: just remember when the boat leaves the lock the volume is displaced, no matter how big the boat. with no boat there is nothing to displace, so it's the same.

 

[NeilO]

Haha. you mentioned nothing about the boat/ship moving......
the lock "a fixed body of water" would have to displace a % with a boat in it,.......

from now on please be more specific when writing questions....






and its still C.

 

[promhandicam]

Neil O,

Hopefully this diagram will help explain why they are all the same.

Sorry the writing is a bit small but the light blue shows the water needed to raise either a small or a large vessel - the same volume in each case.

HTH, Steve

(patently someone else who has nothing better to be doing this morning :roll: )

 

[NeilO]

of course , the boat IS already in the water, ergo the displacement has already taken place











*dons dunces cap, and stands at back of class......*

 

[Dave S]

Because boats displace the same amount of water whether the lock is full or empty.

An empty lock has no water to be displaced....then again, the boat couldn't get in there anyway... :wink:

However, your explanation of the answer to the question (as illustrated by promhandicam) was very clear - and correct!

Dave

 

[TonyW]

The prize goes to TonyW as first to post the correct answer :lol: Yes they are all the same :wink:

Oh great - you did say that the winner could come around and have their pick from your workshop didnt you

Cheers
Tony