test

• Fluid


  A liquid or a gas
• Pressure in fluids


  The forces due to pressure act at right angles (normal to) the surface
• Calculating pressure


  1. Pressure = Force/Area

  2. Pressure (Pascals)

  3. Force (Newtons)

  4. Area (metre²)
• Density of atmosphere with increasing altitude


  The atmosphere becomes less dense as altitude increases
• Earth's atmosphere


  A thin (relative to the magnitude of the Earth) layer of gas surrounding the Earth
• Equation for pressure in liquids at different depths

  • Pressure due to a column of liquid(Pa) = Column height(m) x density(kg/m³) x gravitational field strength(N/kg)
  • P = hρg
• Upthrust


  The weight of the fluid that the object displaces
• Factors influencing whether an object will sink or float

  • Upthrust
  • Weight
  • Density of fluid