Density

• Density formula:

  d=m/v
• Density:

  mass and density is directly proportional
• Density:

  density and volume is inversely proportional
• density of water:

  1 g/mL
• density is made up of two other measurements -mass and volume
• different materials have different densities
• the density of a substance is the same for all samples of the substance
• an object will float if it is less dense than the surrounding liquid
• Water Displacement:

  Voume of the object is equal to the volume of the displaced water
• Density of water : 1g/cm^3
• The specific gravity is the ratio between the density of an object, and a reference substance. The specific gravity can tell us, based on its value, if the object will sink or float in our reference substance.

  
  

  -comparing the sensity of a substance with that of the density of pure water
• Buoyancy

  The ability of an object

  to float in a fluid
• Buoyant force

  The upward force that acts on a submerged object.

  It acts opposite of gravity.
• Positively bouyant

  
• Positive Buoyant

  
• Negatively Buoyant

  
• Neutrally Buoyant

  
• Pressure in all directions

  • horizontal preassures cancel each other out
• •Archimedes' principle is named after Archimedes of Syracuse, who first discovered this law in 212 B.C
• Archimedes' principle

  •Any fluid applies a buoyant force to an object that is partially or completely immersed in it: the magnitude of the buoyant force equals the weight of the fluid that the object displaces”
• The “upward” force

   is acting on an

  object due to the

  displaced fluid
• ARCHIMEDES’ PRINCIPLE states that the WEIGHT of the amount of water displaced is equal to the BUOYANT FORCE
• Formula of archimedes principle:

  Fb = ρfluidVg
• Fb > Wobject  :  RISE
• Fb ≈ Wobject  : FLOAT
• Fb < Wobject  : SINK
• SP GR DISTANCE > 1, object sinks on the water
• SP GR DISTANCE < 1, object floats on the water
• SP GR DISTANCE = 1, object stays at any level of water