Topic 3 - Energy

the ability to do work or cause a change

Joules

• caused by movement of charges charger

• energy stored in nucleus of atom • released from nuclear reactions nuclear power plants sun/stars

• anything noisy • type of kinetic energy speakers vocal chords

• determines how active an objects atoms are fire

• anything luminous sun light bulbs candles

• potential energy stored within chemical bonds of an object batteries coal

• potential energy due to an objects position (calc by m x h x g bird on tree brand

• potential due to compression or expansion of an object rubber band

kinetic energy is the energy due to its motion and potential energy is stored energy

chemical elastic gravitational

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the transfer of energy by a force acting on an object as it is displaced

• energy cannot be created or destroyed • when energy is converted from one form to another, total energy stays the same

• energy is passed along but the type of energy is not changed

• energy changes from one type of energy to another

kickicking a soccer ball w/ kinetic energy from leg -> ball moving with kinetic energy

light with electrical energy -> heat + light

chemical potential -> kinetic + heat

study of how heat can be transferred between objects or transformed into other forms of energy

a type of thermodynamic system that can exchange heat with its surroundings but mass cannot be exchanged

when 2 objects are at different temperatures and there is a temp gradient - when the thermal energy of an object is the same as its surroundings, thermal equilibrium is reached

• conduction occurs when two objects at different temps come in contact with each other • heat flows from the warmer to cooler obejct until they are both at the same temp