A boat floating in fresh water displaced 16000 N of water. How many newtons of salt-water would it displace if it floats in salt-water of a specific gravity of 1.17?
The ANSWER IS 14,000 N, but how to I get that?
2007-12-12 02:21:12 · 5 answers · asked by bazjhi 1 in Science & Mathematics ➔ Physics
The equation for buoyant force is Fb=density*gravity*volume. Also the weight of the water displaced is equal to the volume of the water displaced.
2007-12-12 02:29:44 · update #1
The answer is 16,000 Newton regardless of fresh water, salt water, or mercury. Simply because weight of displaced liquid is equal to the weight of the boat.
Please advice your parents that with a teacher like this you are getting nowhere, and they should consider transferring you to another school.
2007-12-12 03:29:48 · answer #1 · answered by Alexander 6 · 17⤊ 1⤋
You are absolutely right (and so is Alexander, above) and the answer is wrong. You wrote:
"The equation for buoyant force is Fb=density*gravity*volume. Also the weight of the water displaced is equal to the volume of the water displaced."
In salt water, the boat will displace the same 16000 N.
Fb.fresh = Fb.salt = Boat's Weight = 16000 N
The difference is that the boat will displace less volume in salt water by a factor of 1.17.
2007-12-12 05:21:48 · answer #2 · answered by Frst Grade Rocks! Ω 7 · 10⤊ 0⤋
All fresh water boats can float in the denser salt water. There is a slight chance that a boat with very low sides, like a pirogue, which was built for salt water might swamp under the same load in fresh water as it would sit lower. However the average wave height it so much higher in oceans that make a boat with such a shallow freeboard would be unlikely.
2016-05-23 05:15:38 · answer #3 · answered by ? 3 · 0⤊ 1⤋
The ratio of their Densities is 1.17 : 1
Density of salt water : Density of water
Ratio of force will be 1 : 1.17
Force in salt water is = 16000 x 1 / 1.17 = 13675.21368 N
approx. 14000 N
2007-12-12 02:32:10 · answer #4 · answered by Murtaza 6 · 0⤊ 9⤋
It has something to do with the bouyant force.
2007-12-12 02:26:56 · answer #5 · answered by Further Down the Coast 1 · 2⤊ 5⤋