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EGEE Midterm Exam 1 Questions with Accurate Answers
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Exam of 5 pages for the course EGEE at EGEE (EGEE Midterm Exam 1)
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EGEE Midterm Exam 1Process of turning a fuel into electricity that is available in your home - answerA 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 - answerjoule
BTU
calorie
kilowatt hour
Units of Power - answerhorsepower
watt
Two sectors of the economy are responsible for the greatest amount of wasted energy
in US - answerelectricity generation
transportation
Kinetic Energy - answerThe energy of moving things
KE=1/2mv^2
Potential Energy - answerThe energy an object has due to its position
PE=mgh
Nuclear Energy - answerenergy that is locked in the nucleus of an atom and is released
by destruction of mass, also called mass energy
Thermal/Heat Energy - answerThe 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 - answerEnergy transmitted via electromagnetic waves
Longer wavelengths= lower energy frequency
Chemical Energy - answerEnergy stored in the bonds between atoms
Electrical Energy - answerThe energy of flowing electrons
Unit: kilowatt hour
Example of Chemical Energy - answertank of gasoline on a motorcycle
partially charged cellphone battery
eating a slice of pizza
a battery
Example of Potential Energy - answera snap or clip on clothing
mousetrap ready for action
a paperclip gripping a stack of paper
Example of Thermal Energy - answeran incandescent lightbulb that burned out
moments ago
Example of Radiant Energy - answerlight of day
wireless connectivity at the cafe
FM on the car radio
dental x-rays
Example of Electrical Energy - answera bolt of lightning
static from sweater
Example of Nuclear Energy - answerhigh energy subatomic particles from a radioactive
element
Example of Kinetic Energy - answer3000lb. car rolling down the highway
Electromagnetic wave radiant energy forms in order, from longest wavelength to
shortest, from lowest frequency to highest - answerAM radio, microwave oven, heat
from a person or pet, incandescent light bulb, UV - black light, dental X rays, gamma
rays from a radioactive element
Conduction - answerHeat flows from warmer to cooler by contact between the materials
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