I am so confused, water displaced by a boat

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Homework Help Overview

The problem involves a boat floating in fresh water that displaces water weighing 34.7 kN. The question asks for the weight of the water displaced when the boat is floating in salt water with a specified density.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants express confusion regarding the weight of water displaced, questioning whether the information provided in the problem is sufficient or redundant. Some suggest that the problem may involve a comparison between fresh and salt water displacement.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some have noted that the weight of the water displaced is equal to the weight of the boat when floating, while others hint at a potential second part to the question that may require further analysis.

Contextual Notes

There is a mention of Archimedes' principle, indicating that the problem may be related to buoyancy concepts. Participants are also considering the implications of the differing densities of fresh and salt water.

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Homework Statement



A boat floating in fresh water displaces water weighing 34.7 kN.

(a) What is the weight of the water that this boat displaces when floating in salt water of density 1.10 x 10^3 kg/m3?

Homework Equations





The Attempt at a Solution



I am utterly confused. They tell me the boat displaces a 34.7 kN weight of water, then ask for the weight of the water displaced. Looks like they gave it to me in the question?
 
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Okay, I've just been informed the weight actually refers to the boat. Answer is still in the question though. :P
 
Yes. I presume there's a part (b) that's non-trivial.
 
Ibix said:
Yes. I presume there's a part (b) that's non-trivial.

Yes, simply the difference of volume for the salt water and fresh water displaced.

I did beat the water temple in ocarina of time, I got this.
 
They give you the weight of the fresh water displaced, they want the weight of the salt water displaced. But since the weight of the water the boat displaces is equal to the weight of the boat (so long as the boat's floating) then yes, they would just be the same value.
 
Looks like a problem dedicated to Archimedes' principle.
Apparently the professor thought people would need a hint, so he added question (a)...
 

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