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The density of pure water is approximately 1000 kg per cubic meter.
It isn't, strictly speaking, useful to compare the density of a boat to the density of water. A boat can be constructed of material considerably denser than water (consider a steel battleship or aircraft carrier) and still float. What's important is that the boat must be able to displace a volume of water equivalent to the weight of the boat, without allowing the water to enter the boat.
---------------- Addendum ----------------
The answer your teacher is looking for: "The density of the water is greater than the density of the boat.". This answer is not correct in all cases.
If the actual displacement of the boat (sans air) is used to determine density, all steel boats would be denser than water, and most motor boats would be denser than water. A boat which (sans air) is less dense than water cannot fully sink.
Now for the next phase of comprehension: the boat has a degree of buoyancy not just in the water, but also in the air. To measure the total bouyancy (which is 0 while floating), you must understand that the mass of the displaced air (above water level) and the mass of the displaced water (below water level) is the sum of the mass of the air (below water level) and the boat (without air). Were the air denser than the boat, the boat would lift (sans surface tension) from the water and float away in the air.
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How does a heavy boat floats on water?
They have strong wood, and are mechanical crates to lift them aboard.
Why does the water level go down when a boat sinks?
When a boat is floating on water it displaces water equal to its weight(Archimedes Principle). As the density of water is less than boat so water displaced is greater than volume of boat. When the boat sinks water displaced is equal to volume of boat. So less water is displaced in 2nd case and consequently water level goes down. Note - relation between volume(v) mass(m) and density(d) : d = m/v
Why coins sink in the water but not an apple?
Metal is denser than the water thats why it sinks, but boats are designed to be floated in water dosent matter its iron or wooden boat. Its because of a certain law called Archimedes' principle. It states that "the liquid displaced by the object is equals to the weight of that object". The overall density of the boat is less than water.
How heavy does something have to be to float?
The weight of an object doesn't matter. A soap bubble will float, and so will a steel cruise ship with 1,000 people on it. Anything will float if you make it the right shape to push enough water out of the way when it's in the water. Floating is a factor of density not weight, a boat is less dense than the water around it. A ballon is less dense than the air around it. Obviously the more a vessel weighs the larger it has to be to keep it's density less than that of the water it is floating in. Exam if enough people climb aboard a small boat the density of the boat + the people comes closer to that of the water and the boat sinks.
A light coin sinks and a heavy boat floats why is it so?
It is not the weight of an object that matters, but its density. If it has less density than the water (or other liquid on which it is placed), it will float.
Why do boats with water sink?
When the density of entire assembly (boat, peoples, products, equipments, water etc.) has a density greater then the water density the boat is sinking.
Why does water density affect boats floating?
The water density is higher than the boat's therefore it floats on the water.
How does a boat not sink?
the boat has equal or less density than the water. :P
What part of the boat makes it float?
The boat floats because the entire boat - including any air contained within - has a total density less than the density of the water.
How does a heavy boat floats on water?
They have strong wood, and are mechanical crates to lift them aboard.
How are density and the ability of a boat to float related?
According to Archimedes' Principle (which he described in his treatise On Floating Bodies) a body immersed in a fluid experiences a buoyant force equal to the weight of the fluid it displaces. In the case of a floating boat, if the average density of the boat and the air within its hull is less than the density of the water, the mass of the water displaced as it settles into the water will be equal to the to the total mass of the boat but it will displace a volume less than the volume of the boat, thus enough of the boat will remain above the water to allow it to float.
Why does the water level go down when a boat sinks?
When a boat is floating on water it displaces water equal to its weight(Archimedes Principle). As the density of water is less than boat so water displaced is greater than volume of boat. When the boat sinks water displaced is equal to volume of boat. So less water is displaced in 2nd case and consequently water level goes down. Note - relation between volume(v) mass(m) and density(d) : d = m/v
How does density affects fresh water VS salt water?
The salinity of water affects its density By the way this was answered by a fourth grader. I'm really smart
A boat will float higher in the Atlantic Ocean than in the Potomac River because ocean water has -?
Greater density
Will a bar of aluminium float in water?
Not unless its shaped like a boat. (i.e. its density is greater than water)
Why a wooden boat floats on water?
Well, wood is lighter than water, so it floats, but that has very little to do with why a boat floats. You could make a boat out of just about any material that was rigid enough to hold its shape, and strong enough to not crack under the pressure a boat is subjected to, and, if built to the correct dimensions, it would float. A boat floats because the volume of water it displaces when placed in water has a higher weight than the weight of the boat and everything in it. When you put a boat in the water, it "displaces" (pushes aside) a volume of water equal to the volume of the boat up to the waterline. How much water is displaced depends on how heavy the boat and its contents are. As long as that weight is not greater than the volume of water the boat displaces, the boat will float. But remember, as you place more weight in the boat, it sinks lower in the water, therefore displacing more water, so the weight of water being dispaced is increasing too, though not as fast as the weight of the boat. Eventually, if you keep adding weight to the boat, the boat will weigh more than the water it displaces, and the top of the boat will sink below the water. At that point, water will get inside the boat and quickly add more weight to the boat, causing it to sink rapidly. Another way of looking at it. A boat floats by spreading out the weight of its contents over a larger volume than they would normally occupy, thereby lowering the density of the boat and its contents. This would not work if the boat was a flat piece of wood. The wood itself would float, but you couldn't put much weight on it before it sank. However, if you took that same piece of wood and built a structure (a box with the top side open is the simplest) that had a hollow volume that was prevented from being filled with water, the inclusion of that hollow volume increases volume without increasing weight, which means the density decreases. Ultimately, when you place any object in water, whether it floats or not depends on its density. Adding passengers or other dense objects to the inside of the boat will increase its weight (it will also increase the volume of the boat, if the objects are not fully contained within the volume below the top of the boat, but volume does not increase as much as weight does, so density increases.) At the point where the density of the boat and its contents exceeds the density of the water, the boat will sink. However, some time before that point, the density of the boat will be high enough to push it down in the water enough for water to start spilling over the sides, which will rapidly increase the weight of the boat, with no increase in volume, resulting in a rapid increase in density, causing the boat to sink like a rock. So, if you're looking at in terms of density rather than displacement, you need to assume that objects placed inside the boat, even if they do not fit in the original volume of the boat, do not increase the volume of the boat used in your calculations. In other words, assume that all objects fit neatly inside the original volume of the boat without increasing its volume. So that, when you are computing the density of the boat and its contents, the volume in the denominator remains constant at the original volume of the boat alone.
Does silver float?
No gold is more dense than water so it sinks and in the gold rush in Cali they paned underwater
