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Matter and Energy

RCA Chapter 1

QuestionAnswer
absolute pressure The pressure scale that takes atmosheric pressure into account
Atmospheric pressure The weight of the gases that exert a force on the earths surface
British thermal unit (BTU) the amount of heat required to raise the temperature of 1 pound of water 1 degree
Conduction The method of heat transfer by which heat is transferred from molecule to molecule within a substance
Convection the method of heat transfer that is facilitated by the flow of fluid- typically air or water
Energy the ability to do work
Gas laws laws of gases that govern the behavior of gases or vapors
Gauge pressure the pressure scle that does not take atmospheric pressure into account: at sea level, the gauge pressure will be at 0 psig
Heat Energy that increases molecular movement within a substance
Horsepower Unit of power equal to 33,000 ft. / lb min
Inches of mercury vacuum When reading gauge pressure, a reading below atmospheric pressure
latent heat heat energy that results in a change in state of a substance while maintaining a constant temperature
matter Any substance that has weight and mass and occupies space
Power The rate at which work is done
Pressure Force per unit area: common units are pounds per square inch ( PSI)
psia Pounds per square inch absolute: takes into account the pressure of the atmosphere and is approximately equal to the gauge pressure plus 15
psig Pounds per square inch gauge: ignores the pressure of the atmosphere: used to measure pressure in sealed vessels such as car tires and air conditioning systems
radiation method of heat transfer by which heat travels through the air and heats the first object the rays come in contact with
Sensible heat Heat energy that results in the change of temperature of a substance
Temperature term used to describe the level of heat intensity
work Force exerted on an object times the distance the object is moved, measure in foot-pounds ( ft lb)
Created by: DHeptner
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