would a boat float higher at sea or at lake? Explain.?
481877
Your other answerers are on the right track.  When a boat floats, it displaces a volume of water with a weight equal to the weight of the boat.\n\nSo, the heavier the liquid in which the boat is floating, the less liquid it must displace in order to float, and thus, the higher it will float.\n\nThis means that the basic question is which is more dense (and so, heavier), saltwater or freshwater.  And, the answer is that saltwater is somewhere between 2.5% and 3.5% more dense than freshwater.
278046
Depends on what the "mass" is (its density)!  If the mass is more dense than water, then the mass is heavier - if the mass is less dense than water, then the mass is lighter than water.  Ice is the solid form of water and it is less dense, therefore it floats.
159084
Ice floating is because of water's expansion upon freezing. It lowers the density below that of liquid water, meaning it floats.
561534
Your question is a bit ambiguous, but let's see if we can answer and clarify:\n\n(1) There is a lake with a certain amount of water, thus establishing a water level with respect to the ground.\n(2) There is a boat with a coin inside it on the lake. The boat sinks into the lake to a level that you can mark on the side of the boat.\n(3) The coin is tossed into the lake, thus reducing the total weight of the boat and this will cause the "water level" wrt to the boat to change, i.e. the "water level" will decrease a bit since the boat will have risen a bit higher from the water surface.\n(4) When the boat with the coin inside it is floating on the lake, the lake's water level wrt to the ground will rise a bit, because the boat has displaced the lake's water.\n(5) When the coin is tossed into the lake, the water level wrt to the ground does change, but we do not know how because now the lake's water is being displaced by the coin's physical volume, not by its weight, as it was the case when it was inside the boat.
257654
Say the anchor weighs 15 pounds in air and displaces 2 pounds of water.\nBefore the drop, the boat displaces its weight plus the 15 lb weight in air of the anchor. This is the maximum displacement situation, so the water is at maximum height.\nAfter the drop, if the anchor hits bottom, the boat displaces its weight only and the anchor displaces 2 lb of water, the minimum displacement situation, so the water is at minimum height.\nAfter the drop, if the anchor doesn't reach the bottom, the boat displaces its weight plus the 13 lb weight in water of the anchor. The anchor displaces 2 lb water. The total displacement is the same as the maximum displacement situation, so the water is at maximum height.
196335
A ship can float on water because the desity of the ship is less than that of the water arround it.  When I speak of the Density, I speak of the ship as a whole.  The materials can be much more dense than water including steel or even Concrete.  What matters is what is in the ship.  If there is mostly air or something light in the ship, the average desity of the ship is very low and the ship will float high in the water.  If there is a lot of heavy cargo, the ship will float low in the water, unless too much cargo is loaded that is too heavy, then the ship could actually sink.\nWhen the ship is sitting on the water, it is displacing a certain amount of water.  The surrounding water then places pressure upon the ship pushing inward and upward.  The ship, not weighing as much as the water that is displaced is held up by this pressure.  If the wieght of the ship becomes more than what is displaced, then the ship will sink.
291004
if an object is floating, the buoyant force on it equals its weight -- the vertical forces have to sum to zero.  try drawing a free body diagram to convince yourself of this.
1047922
It all depends on buoyancy and density. \n\nIf the weight of an object is less than the weight of the fluid the object would displace if it was fully submerged, then the object is less dense than the fluid and it floats at a level so it displaces the same weight of fluid as the weight of the object.\n\nIf the object has exactly the same density as the liquid, then it will stay still, neither sinking nor floating upwards, just as the liquid nearby stays still.\n\nUNLESS, \n\nAn object made of a material of higher density than the fluid, for example a metal object in water, can still float if it has a suitable shape (ex: hollow) that keeps a large enough volume of air below the surface level of the fluid. In that case, for the average density mentioned above, the air is included also, which may reduce this density to less than that of the fluid.
276362
in the unconstrained case (no floor), water from the lowest hole will reach the furtherest given enough time (vertical space to drop). With a vertical constraint (a floor), the optimal coverage will be from a hole one third the way up from the floor, not the top hole near the surface of the water, and not a hole at floor level.\n\nAlthough I really don't see how this applies to wind sailing:-)
249885
If it's velocity is constant, and you jump straight up, you will land in the same place on the boat, because you, being on it, are travelling at the same velocity, and your horizontal velocity remains constant while you are airborne. (If you think you'll land in the water, then tell me, why is it that when you jump, on an airplane, you don't slam against the back wall?) Of course, you may have a difficult time maintaining your balance when you land, and that may cause you to fall into the water.
152879
No, it will not.  The other answers to this question are on the right track, in that they point out that an object's density is the key thing in most situations, since if it is less dense than the fluid it is in, it will displace fluid equal to its weight before it is completely submerged, and hence float.\n\nBut in *this* problem, we are told from the outset that there is not enough water to be displaced.  Therefore, the object will displace all the water, all 1 lb. of it, and still not have displaced enough water to equal its weight.  Therefore, it will rest on the bottom, i.e. not float.
335054
Both are capable of performing well in salt water as long as there is a good flush after boating with fresh water. I live in Fort Walton Beach, Fl. , and you see alot of both.
1134473
The Sea. The sea can make a ship float but not a pin.
1047132
1.A floating structure, such as a flatbottom boat, that is used to support a bridge. \n2.A floating structure serving as a dock. \n3.A float on a seaplane.
901376
Buoyancy is alot like drag in air, its proportional to surface area. (As in, if you increase the surface area, the force required to overcome the "drag" of water increases).\n\n You have one of two situations: Your boat is stationary, in which case, a barge or square shaped vessel with pontoons balancing it, or a dynamic vessel, with pointed fore and aft sections, once more with pontoons.\n\n Pontoons are what are going to make or break your design, you can increase your potential surface area by adding pontoons on arms, jutting from the sides of your vessel, and reduce your boat's mass at the same time.
122466
Actually a mono-hull is a displacement hull.  A displacement hull achieves no lift out of the water and is limted to a maximum speed that is largely a function of the length of the crafts waterline.  Once maximum hull speed is reached appling more power will result in no increase in speed.\n\nA catamarans hull typically can lift out of the water or "plane".  When a boat planes it is no longer constained to a maximum speed but an increased in power will make it go faster.
290972
pretty sure it wouldnt make a BIG difference by ANY means, but it would make the water higher by a smigen....  i guess?  lol