Keeping warm + heat transfers

• conduction- vibrating particles transfer energy to neighbouring particles
• conduction happens in solids because there are a lot of collisions which pass on energy
• How well an object transfers energy by conduction= thermal conductivity
• Convection happens in liquids and gases
• Conduction and convection have one with thing in common they both involve particles gaining KE energy but in conduction energy is transferred whereas in convection particles gain KE energy and move faster
• Radiation is the energy transfer through a vacuum ( no particles)
• Energy in radiation is carried by infrared waves, the more hotter the object the more radiation released
• All objects constantly absorb and emit radiation
• Rate of energy transfer is reduced by increasing thickness, decreasing thermal conductivity and decreasing temp difference
• Double glazing is when you add an E pane of glass to a window prevents heat loss by conduction
• Change in GPE=mass (kg) x GFS9.8 or 10 x height (m)
• These are formulas

  
• KE= 0.5 x m(kg) x v(2) make sure speed is squared on calc
• whenever you calculate velocity make sure to like square root answer
• Insulation slows down the rate at which energy transferred out of a house by heating