boats are important because they use them to carry ccargo from place to place
The water density is higher than the boat's therefore it floats on the water.
When the density of entire assembly (boat, peoples, products, equipments, water etc.) has a density greater then the water density the boat is sinking.
Only if the overall density of the boat is less than the medium in which it is placed.
Boats float because the mass of the water they displace is greater than the mass of the boat. This difference in density creates bouyancy.Read more: What_makes_a_good_boat_float
Density is important because it can show you if things float or sink.
It only floats if the density of the metal used is less than 1 gm/cm3
Boats help us carry things place to place and also help with travelling and holidays
density is very important. i cant think of the exact definition as to why it is important, but let me give you 2 examples: when a metal such as gold is mined, the metal comes with a lot of impurities. so it is then heated to the point where everything is a liquid. because of the difference in densities the impurities will "float" towards the top, and the pure gold "sinks" towards the bottom. they can then scrape off the top layer(s) of impurities another example is boats. the resultant density of the boat is less than that of the water and so allows the boat to float
The floating or sinking of an object depends on the upthrust force the water exerts on the object. By Archmides' principle, Upthrust Force = (Density of Liquid) * (Volume of Liquid Displaced by the object) therefore the upthrust force depends on the density of the liquid, and as salt water has a larger density than fresh water, boats should float better on salt water.
Methane hydrates are not inherently bad for boats. However, if methane is released from hydrates in large quantities in the water, it can reduce the water density and potentially lead to buoyancy issues for boats. Methane hydrates can also contribute to the formation of gas seeps, which can be hazardous for boats navigating in those areas.
Density is a property; density is important in any technology to evaluate materials.