IGCSE PHYSICS: chapter 19- density and pressure

HideShow resource information
View mindmap
  • Chapter 19: density and pressure
    • density, ? = mass, m / volume, V
    • Density is measured in kg/m³.
      • To convert from kg/m³ to g/cm³ times by 1000.
    • volume = w (width) x h (height) x d (depth)
    • pressure, p = force, F / area, A
      • Pressure is measured in Pa = pascals
        • It is the weight in newtons per metre squared acting down on a surface.
        • 1 Pa = 1 N/m²
    • In stationary liquids and gases the pressure increases with the depth of a gas or liquid.
    • Pressure difference, p, in Pa = height in m x density in kg/m³ x gravitational field strength in N/Kg
    • To find the density of an irregular shaped object.
      • 1. Weigh the density of the object.
      • 2. To find its volume, fill a can with a pout with water until it just flows out of the spout.
      • 3. Place a clean, dry measuring cylinder beneath the spout.
      • 4. Slowly lower the irregularly shaped object into the can until it is completely submerged.
      • 5. The water displaced will have the same volume of that of the object.
        • So the volume of the object is found by measuring the volume of the water collected in the measuring cylinder.


No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Forces and Motion resources »