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Energy (Kinetic Energy (Depends on (mass, velocity), Energy of motion,…
Energy
Kinetic Energy
Depends on
mass
velocity
Energy of motion
Calculating KE: .5mv2
Thermal Energy
Temperature: measure of the average kinetic energy of the particles in an object
Thermal Energy: sum of the kinetic and potential energy of all the particles in an object
related to temperature, but not the same
Heat: thermal energy that flows from something at a higher temperature to something at a lower temperature
Calculating Thermal Energy
Joules = mass x change in temperature x specific heat
Specific Heat
Water has a high specific heat and takes more heat to raise the temperature
Metals have a low specific heat and don't require much heat to raise the temperature
amount of heat that is needed to raise the temperature of a 1kg of some material by 1 degree C
Transferring Thermal Energy
Convection
transfer of thermal energy in a fluid by the movement of warmer and cooler fluids from place to place
Convection Current
rising and sinking action of lava lamp is an example, uses both convection and conduction
Conduction
thermal energy that is transferred by the collisions between particles, not by the movement of matter
Radiation
transfer of thermal energy by electromagnetic waves
called radiant energy, can be absorbed, reflected, or transmitted
dark colors absorb more
Potential Energy
stored energy due to position
3 types
elastic: springs or rubber bands
chemical: food and fuel
gravitational: position above Earth
mass x acceleration x height
Law of Conservation of Motion
states that energy can not be created or destroyed