EGEE – Midterm Exam 1 – Energy and Environmental Engineering –
study material
Process of turning a fuel into electricity that is available in your home - ANS ✔✔A fuel is burned in a
boiler.
Water absorbs heat and boils into steam.
High-pressure steam is directed through a turbine, causing it to spin.
A turbine spins an electric generator, pushing electrons through wires.
A step-up transformer reduces the current and raises the voltage.
High-voltage power lines distribute the electric power to distant locations.
A step-down transformer reduces the voltage and raises the current.
Units of Energy - ANS ✔✔joule
BTU
calorie
kilowatt hour
Units of Power - ANS ✔✔horsepower
watt
Two sectors of the economy are responsible for the greatest amount of wasted energy in US - ANS
✔✔electricity generation
transportation
, Kinetic Energy - ANS ✔✔The energy of moving things
KE=1/2mv^2
Potential Energy - ANS ✔✔The energy an object has due to its position
PE=mgh
Nuclear Energy - ANS ✔✔energy that is locked in the nucleus of an atom and is released by
destruction of mass, also called mass energy
Thermal/Heat Energy - ANS ✔✔The energy of heat or temperature
Easier to obtain heat that to produce work
flows from areas of higher temperatures to areas of lower temperatures
Radiant Energy - ANS ✔✔Energy transmitted via electromagnetic waves
Longer wavelengths= lower energy frequency
Chemical Energy - ANS ✔✔Energy stored in the bonds between atoms
Electrical Energy - ANS ✔✔The energy of flowing electrons
Unit: kilowatt hour
Example of Chemical Energy - ANS ✔✔tank of gasoline on a motorcycle
partially charged cellphone battery
eating a slice of pizza
study material
Process of turning a fuel into electricity that is available in your home - ANS ✔✔A fuel is burned in a
boiler.
Water absorbs heat and boils into steam.
High-pressure steam is directed through a turbine, causing it to spin.
A turbine spins an electric generator, pushing electrons through wires.
A step-up transformer reduces the current and raises the voltage.
High-voltage power lines distribute the electric power to distant locations.
A step-down transformer reduces the voltage and raises the current.
Units of Energy - ANS ✔✔joule
BTU
calorie
kilowatt hour
Units of Power - ANS ✔✔horsepower
watt
Two sectors of the economy are responsible for the greatest amount of wasted energy in US - ANS
✔✔electricity generation
transportation
, Kinetic Energy - ANS ✔✔The energy of moving things
KE=1/2mv^2
Potential Energy - ANS ✔✔The energy an object has due to its position
PE=mgh
Nuclear Energy - ANS ✔✔energy that is locked in the nucleus of an atom and is released by
destruction of mass, also called mass energy
Thermal/Heat Energy - ANS ✔✔The energy of heat or temperature
Easier to obtain heat that to produce work
flows from areas of higher temperatures to areas of lower temperatures
Radiant Energy - ANS ✔✔Energy transmitted via electromagnetic waves
Longer wavelengths= lower energy frequency
Chemical Energy - ANS ✔✔Energy stored in the bonds between atoms
Electrical Energy - ANS ✔✔The energy of flowing electrons
Unit: kilowatt hour
Example of Chemical Energy - ANS ✔✔tank of gasoline on a motorcycle
partially charged cellphone battery
eating a slice of pizza
