10+Buoyancy

=Buoyancy- =

**: Is the net upward force that a fluid exerts on an immersed object **


 * ARCHIMEDES' PRINCIPLE** states that an immersed object is buoyed up by a force equal to the weight of the fluid it displaces.

Some key ideas are:
 * Pressure increases with depth
 * If weight of object is greater than buoyant force it sinks
 * If it is less that the force it floats

the buoyant force on an object increases as the depth of the object increases  objects are lighter when they are submerged because the buoyant force pushes them towards the surface  denser fluids exert a greater buoyant fore on objects than that of a lesser density

gases rise because they are less dense than air ad rise because of the force of buoyancy