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B/ the hull would no longer displace water - as waster would be inside.
Crocodiles close there valve to stay under water.
No, a dish drainer tray does not have to stay in the sink. You might want to put the draining part in the sink though because that is where the water will drain into.
it matters if it lighter or more dense so if you put oil in water together the oil will sink to the bottom and the water will stay at the top
An object that has a "net density" greater than the liquid it is placed in will normally sink to the bottom of the container. In some cases, usually for small objects, the surface tensionof the liquid will keep it afloat, but that can change (e.g. adding soap to water reduces surface tension).When sunken, the object is DISPLACING its net volume of liquid. When an object floats, it is only displacing its net weight of liquid.For example, an open steel canoe floats on a lake because its interior contains air, making its net density lower than water. The canoe will sink down partly into the water, and displace a mass of water equal to the mass of the canoe and its occupants. If it is overloaded, and water enters the canoe, it will sink to the bottom of the lake, its net density now being greater than water. The occupants will swim away, and the canoe is now only displacing its net volume (i.e. of the sides and bottom of the boat, and any small closed spaces that water cannot enter).
The boat will sink lower in fresh water. Try floating in the ocean versus your pool. You will see it is easier to stay afloat in salt water.
They stay in pipping and can react when mixed with water.
because the pieces that make up the wood are spaced out are the reasons it can stay afloat for a while no matter how large it is but when it does stay in the water for a long time the start to become more close together and when that happends they sink.
In water
The block isn't aerodynamic, so it sinks. The boat, no matter what it's constructed with, will be able to float if it's in a shape that will be aerodynamic in water.
Canoes do sink. Metal canoes will sink if they are turned sideways and loose their air pocket. Wood canoes normally do not sink if they are not waterlogged as the wood is buoyant. The same can be said for canoes made of other buoyant materials.
The canoe would move backward a bit.