Divers usually increase their density by wearing a weight belt (which contains lead weights). Some divers also rely, to a lesser degree, on using steel tanks, which are more dense than aluminum tanks.
To decrease their density, divers put air into a Bouyancy Control Device (BCD). Some divers may also control bouyancy by putting air into a drysuit if they wear one.
Whereas the increase in density created by the weightbelt is normally fixed, the positive bouyancy provided by the BCD can be varied throughout the dive.
Usually a divers net density will decrease over the dive - a diver with a full Scuba tank has about 4.5 lbs of extra weight (the weight of the gas) over a diver with an empty scuba tank.
Divers use substances with high density (ie. lead) to help them sink, and substances with low density (ie. air) to help them float. That way they control their bouyancy.
A material needs a lower density than water to float in water. Ships float in water because their average density is lower than water. The average density includes the steel hull and the air inside the hull.
This is archemedies principle. This is a balance between the force on the water displaced by gravity compared to the force on the floating object due to gravity. That is if the average density of the object that whishes to float is less then water then it will float. If it is greater then it will sink.For a boat the average density is the average of the density of the hull and the air inside the hull.
An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.
Its average density is a lot less than water
the ability to float with density is almost impossible
More density will sink. Less density will float.
It shouldn't, because its average density is greater than the oil.
No. To float density must be less than 1 (the density of water).
Average density of the object compare to density of water. If denser than water, it will sink.
No. The key to whether an object floats or sinks is the average density, i.e., mass divided by volume. Also, whether an object will float or not also strictly depends on the surface volume. A piece of tin foil shaped into a boat will float and the same mass of tin foil shaped into a crumpled up ball will not float.
If its average density is less that water, it will displace more than its own weight in water, and it will float.