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Energy
capacity to do work
potential energy
energy of position
kinetic energy
energy of movement
Heat
flow of energy due to a temperature difference
Temperature
measure of average kinetic energy
exothermic
heat is released
endothermic
heat is absorbed
law of conservation of energy
energy is neither created or destroyed
If energy an heat flow into the system the signs are
positve
if energy and heat flow out of the system the sings are
negative
greenhouse effect
when fossil fuels are burn they prove CO2 which leads to warmer temp
energy sources in the USA
fossil fuels, nuclear, hydro,wind,solar,geo
wind : advantage
no pollution and cheap
wind : disadvantage
wind power is less predicable
potential energy example :
water sitting behind a dam
kinetic energy example :
a an swimming in a pool
