Scienceeeee

• Heat


  Transfer of thermal energy from a hot object to another
• Heat is only present when there is a temperature difference between objects
• Once there is no temperature difference, the 2 objects already reached thermal equilibrium
• Heat


  Energy in transit
• Heat transfer


  Heat transfers from a warmer object to a colder object
• Conduction


  Transfer of heat from 1 location to another through the successive collisions of electrons & atoms of the material
• Metals


  • Good conductors because they have free electrons
• Thermal Insulators


  They do not allow heat to transfer through them easily
• Thermal Insulators


  • Cork
  • Fiberglass
  • Plastic
  • Wood
  • Snow
• Convection


  Transfer of heat through the movement of the substance itself
• Convection is the primary method of heat energy transfer for liquids & gases, collectively called Fluids
• Sea breeze


  Enables the air above the land be heated & rise, while the cooler air above the water sink, which replaces the risen warm air over the land
• Land breeze


  During the night time, the process is reversed since the land cools faster than the water
• Radiation


  Another method of heat transfer through electromagnetic waves (waves that can transfer energy without any medium)
• All objects radiant and absorb radiant energy
• Good emitters of radiant energy are also good absorbers of radiant energy
• Poor absorbers of radiant energy are also considered poor emitters
• If this is not the case, objects will not reach thermal equilibrium
• A good reflector of radiant energy is considered as a poor absorber of it
• Sound wave


  A longitudinal wave produced by vibration is an object, it travels parallel to the motion of the particle
• Sound wave


  • It is a mechanical wave that needs a medium such as solids, liquids, or gases to propagate
• A medium is composed of particles which move or vibrate when energy