Buoyancy and Fluids Quiz

Buoyancy is the upward force exerted by a fluid, such as water, on an object submerged in it, counteracting the object's weight.

Viscosity is the property of a fluid that determines its resistance to flow; higher viscosity implies thicker, more resistant flow.

The SI unit of viscosity is the pascal-second (Pa·s), representing the dynamic viscosity of a fluid.

Density is the fluid property that determines whether an object will sink or float; objects with lower density than the fluid float.

Newton (N) is a unit of force, not pressure; pressure is measured in pascals (Pa) or newtons per square meter (N/m²).

Archimedes' principle states that a body immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.

When an object is fully submerged in a fluid, the buoyant force acting on it increases.

Buoyancy is not affected by the depth of the fluid; it depends on the object's volume and density.

As depth in a fluid increases, the pressure also increases due to the weight of the fluid above causing higher compression.

Pascal's law states that a change in pressure applied to a confined fluid is transmitted undiminished to all portions of the fluid.

The buoyant force on a helium balloon is greater than its weight, causing it to float in the air.

The mechanical advantage is calculated as the ratio of the larger piston area to the smaller piston area, so it's 50/10 = 5.

Bernoulli's effect describes the change in pressure experienced by a fluid when its velocity changes; higher velocity corresponds to lower pressure.

A submarine submerging by letting water into its ballast tanks illustrates Archimedes' principle, adjusting buoyancy by altering displaced fluid.

Ice floats on water because it has a lower density than liquid water, causing it to be buoyant.