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The total weight of the surface area of a boat is less than than the weight of a body of water of the same size (buoyancy), so that is why it floats. A needle sinks because a body of water with the same size is lighter than the needle.
Note: It is entirely possible to float a needle on water. It requires a bit of doing, but it can be done.
What else can I help you with?
How can a boat float and don't sink?
because the boat is made out of stuff that can float
Does the needle float or sink in water?
A needle will sink in water because it is denser than water. The buoyancy force acting on the needle is not enough to counteract its weight, causing it to sink.
What will sink float or suspend?
A boat
Which property causes a ball to sink and a boat to float?
Density is the property that causes a ball to sink and a boat to float. If an object is denser than the liquid it is placed in, it will sink, while if the object is less dense than the liquid, it will float.
How does the shape of the boat effect it to sink or float?
The science is called "displacement". If the shape of the boat allows the amount of the boat in the water to be less weight than the water it displaces it will float. If the amount of the boat in the water weighs more than the water it displaces it will sink.
Why a needle does not float whereas a heavy ship floats-?
A needle doesn't float because there is very little air in a needle. Metal is much more dense than wood, which is what most boats are made of. When a boat is made of metal, there are air stores inside of the boat that keep it afloat.
What will happen to a needle place in water?
A needle placed in water will float due to surface tension. The surface tension of water allows the needle to be supported on the surface rather than sink.
Does needle float on water?
Yes, a needle can float on water if it is carefully placed on the surface due to surface tension. However, if the needle is pushed down into the water, it will sink due to its density being greater than that of water.
If a boat has a mass of 320g and it displaces 260g does it sink or float?
A boat will float if it displaces a weight of water equal to or greater than its own weight. In this case, the boat has a mass of 320g but only displaces 260g of water, meaning it is heavier than the water it displaces. Therefore, the boat will sink.
Do material and shape affect buoyancy of a toy boat?
Yes it does because depending on the materials of the boat and how much their mass is can change the buoyancy of the toy boat. Boat can be designed to have less volume in order for it to have less density and be able to float. So if the material's mass is alot if can make the boat sink. If the material's mass is not alot then it can help the boat float. If the shape is designed to have more volume than mass it will float. If not then it will sink.
Do plastic boats sink or float?
All plastic items float on water, so therefore a plastic boat floats on water.
Do boats sink?
Boats can sink. They are usually made of materials that allow them to displace water, and permit them to float. From time to time, that material will break down, and the boat will sink.
