How does weight affect buoyancy?

Answer 1

It depends on the two materials involved.

The underlying question here is what affect does temperature have on density -- because it is the relative density of an object that will determine whether it sinks or float in a liquid. Most often, the density of a material goes down with increasing temperature (in other words buoyancy goes up with temperature) -- but that is not always the case. Water is most dense at 4°C for instance, which is why ice cubes float. For any common material, it is trivial to find a graph of density versus temperature (try Google.com for instance). The lower the density, the more buoyant it will be (it won't be buoyant at all in water if the density is above 1 gram/cm3 though).

Answer 2

In order to float in water, it must have positive buoyancy, so that the amount of water displaced by the object weighs more than the object itself. For example, a boat that weighs 250 lbs but displaces 400 lbs of water will easily float. Buoyancy is an upward force equal to the weight of the water that is displaced.

An object that sinks in water has negative buoyancy because the amount of water it displaces weighs less than the object itself. So the gravitaional force (weight) on the object is greater than the upward buoyancy of the object, and it sinks. For example, a boat that weighs 400lb but displaces only 250 lbs of water will sink.

Answer 3

volume: when you heat it, the particles will spread out, making the substance expand

Density: same as above plus the particles are more spread out when heated, making the substance less dense, and when cooled the substance is more dense because the particles are closer together

viscosity: same as above

Answer 4

In general, buoyancy is reduced at higher temperatures. This is because water is less dense at higher temperatures so the floating object must sink deeper to displace the same mass of water. It is for this reason that ships have different plimsoll lines for different parts of the world.

Answer 5

Heat affects the density of objects, such as water, and if that density is changed, the ability to be buoyant in water changes, too.

Answer 6

The object that is less dense will float over top of a more dense object. Buoyant objects are less dense then the things they are in which is why they float.

Answer 7

i dont know but its a yes

Answer 8

No. But density affects buoyancy.