Double-check that volume formula.talaroue said:B=mg
V*density*g=mg
denisty=M/V
denisty= .1371 kg/(4/3*PI*r^2) because its a sphere
Buoyancy is the ability of an object to float or rise in a fluid. It is caused by the upward force exerted by the fluid on the object, known as the buoyant force.
Buoyancy is calculated using Archimedes' principle, which states that the buoyant force is equal to the weight of the fluid displaced by the object. This can be expressed mathematically as Fb = ρVg, where Fb is the buoyant force, ρ is the density of the fluid, V is the volume of the fluid displaced, and g is the acceleration due to gravity.
The buoyant force on an object is affected by the density of the fluid, the volume of the fluid displaced, and the acceleration due to gravity. It is also affected by the shape and density of the object itself.
Objects float when the buoyant force acting on them is greater than or equal to their weight. This is usually the case for objects with a lower density than the fluid they are placed in. Objects will sink when the buoyant force is less than their weight, typically due to a higher density than the fluid.
Buoyancy is used in many real-world applications, such as shipbuilding and submarine design. It is also used in hot air balloons and blimps to provide lift. In addition, the concept of buoyancy is important in understanding the behavior of fluids and how they interact with objects.