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HEAT(anna) - Coggle Diagram

- - - - know if object gain/loss heat
- - - - =can take place in vacuum
  - - - radiation of heat moves in all directions
  - - - e.g cooling coils of refrigerator painted black to ensure heat lost quickly.black colour radiate heat faster to the surroundings
  - - - reflector
        
        bounce off radiation
      - take in heat in the form of radiation
- - - - convection requires movement of particles in a medium.particles in fluid move freely, can transfer heat from one region to another by convection
        
        however, particles in solids not able to move freely, can only vibrate in fixed positions,vacuum not have any particles in it
  - - - density of region of cooler fluid now become higher than heated region of fluid
        
        hense hot fluid rises cold fluid sinks
    - - hence,density decreases
  - - - boiler installed at lower part of hot water system
        
        1.water heated up in boiler
        
        2.hot water rises to upper storage tank
        
        3.cold water in water supply tank sinks
        
        into the boiler to replace hot water
      - boiler at bottom=heated water rises,cold water sinks ,replacing hot water
- - - - prevent heat loss
- - - - cools=bends=turn on
- - - - water level drops initially,because the glass flask expands first before water upon heating
        
        after heating for a while water level increases,shows liquid expand upon heat gain
- - - - vacuum
        
        silvery glass walls
        
        silvery wall reflects radiant heat back into the liquid
        
        radiation
        
        it does not have any particles
        
        conduction+convection
      - air is good insulator of heat :blanket
        
        conduction
    - - convection
- - - - cooler +denser air from sea flow to replace rising hot air
        
        air to sea=sea breeze
        
        land is always quicker when gaining heat
- - - - cooler+denser air from land flows towards sea to replace the rising hot air
        
        land to sea=land breeze