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The mass of the rock doesn't make any difference. Anything with a volume of 21 L, when it's

completely submerged, displaces 21 L of water, and produces a buoyant force equal to the

weight of 21 L of water.

21 L of water has a mass of 21 Kg. Its weight is (MG) = (21 x 9.8) = 205.8 Newtons = 46.3 pounds. (rounded)

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Q: A 58 kg rock with a volume of 21 L is completely submerged in water The density of water is 1 kgL What is the buoyant force on the rock?
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How does the amount of buoyant force exerted by water vary with the volume of submerged solid?

The amount of buoyant force is equal to the weight of the displaced water. The VOLUME of the displaced water is equal to the part of the solid that is submerged - thus, the buoyant force is equal to this volume, times the density of the water.


What is the buoyant force of a 150lb object submerged in water?

That completely depends on the object's volume (which you have not mentioned). The buoyant force on it is equal to the weight of an equal volume of water.


What is the relationship between density and volume and buoyancy?

Density = mass / volume. An object will float if it has less density than the fluid in which it is placed. The buoyant force is equal to the volume (this may be the submerged part of the volume) times the density of the displaced fluid.


When does buoyant force become maximum?

As soon as an object is completely submerged in the liquid, displacing the maximum volume of liquid.


The buoyant force on an object is least when the object is?

The buoyant force is zero when the object is just touching the liquid. As the object displaces more volume, the buoyant force increases until the object is completely submerged. Once the object is submerged, it doesn't matter how deep it is, the buoyant force remains constant.


What is the buoyant force acting on the rock when A rock with volume of 0.3m3 is fully submerged in water having a density of water is 1000 kgm3?

The buoyant force on a submerged object is equal to the weight of the displaced fluid. The density of the water is 1,000 kg/m3, so its weight is 1,000 N/m3. The volume of the rock is 0.3 m3. The buoyant force = weight of the displaced water = (0.3 x 1,000) = 300 N.


Does the buoyant force on a submerged object depend on the volume of the object ir the weight of the object?

On its volume.


An object with a mass of 4.6 kilograms and a volume of 0.0025 cubic meters is submerged in water. What is the buoyant force on the object?

The buoyant force is equal to the amount of water displaced. Multiply the volume of the object by the density of water - then convert that to a force (at about 9.8 newton/kilogram).


If the solid is not completely submerged in the water Explain how this technique error affects the reported density of the solid?

You wouldn't get the right reading of volume of the object, so you're density calculation would be off.


Distinguish between submerged body nad immersed body?

SUBmerged means that the entire thing is completely UNDER the fluid surface.IMmersed means that the thing has some part IN the fluid ... that is the part whose Volume displaces the fluid, which has buoyant force applied to it.(So, "completely immersed" is not redundant, but it means "submerged")


What is the relationship between density of a liquid and the buoyant force exerted on the mass?

buoyant force = density of the liquid*Volume*gravity. so the buoyant force is directly proportional to the density of a liquid.


How is the upthrust related to volume of the body submerged in a liquid?

The upthrust is the volume, multiplied by the weight density of the liquid in which it is submerged - or the volume, times the mass density of the liquid, times the gravitational field.