Fluids and Buoyancy

• Density = mass / volume
• The density of water is 1000 kg/m^3
• Positive Buoyancy Describes... an object that has a density less than water and will float to the top.
• Neutral Buoyancy Describes... an object that has a density the same as water and will suspend in the middle.
• Negative Buoyancy Describes... an object that has a density greater than water and will sink.
• Matter is anything that has mass and takes up space.
• Mass is the quantity of matter which a body contains
• Flow Rate= Volume of fluid flowed/time taken to flow (In seconds)
• Density is a.... Measure of the mass per unit volume of a substance.
• Volume of a Cylinder = pi x r^2 x h
• Weight is the Gravitational Acceleration (Force of Gravity) on an object (Subject to Change)

  ..........Where As........

  Mass is the quantity of matter which a body contains
• Cohesion is the attraction between molecules of the same substance. (Increases Viscosity)
• Friction is the resistance of one surface to the movement of another surface.
• An Increase in Temperature will reduce Viscosity. While a decrease in Temperature will increase Viscosity
• Adhesion is the attraction between particles of different materials.
• Viscosity is the resistance of a fluid to flow. It is measured in Pascals per second (Pa/s)
• Concentration is the amount of solute in a given volume of solution.
• Larger Particles experience greater Viscosity
• Buoyancy


  The upward force that a fluid exerts on an object
• The buoyant force


  Is directly proportional to the density of the fluid