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48 Cards in this Set

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the actual air pressure given by the gauge reading plus the normal atmospheric pressure
Absolute Pressure
Any object placed in a fluid apparently loses weight equal to the weight of the displaced fluid
Archimedes Principle
the pressure caused by the weight of the air in the atmosphere
Atmospheric Pressure
For the horizontal flow of a fluid through a tube, the sum of the pressure and energy of motion(kinetic energy) per unit volume of the fluid is constant
Bernoullis Principle
The upward force exerted on a submerged or partially submerged object
Buoyant Force
The volume of fluid flowing past a given point in a pipe per unit time
Flow Rate
The amount of air pressure excluding the normal atmospheric pressure
Gauge Pressure
The pressure applied to a confined liquid is transmitted without measurable loss throughout the entire liquid to all inner surfaces of the container
Hydraulic Principle (Pascals Principle)
The pressure a liquid at rest exerts on a submerged object
Hydrostatic Pressure
The force applied per unit area
Pressure
The smooth flow of a fluid through a tube
Streamline Flow
The erratic, unpredictable flow of a fluid resulting from excessive speed of the flow or sudden changes in direction or size of the tube
Turbulent Flow
The lowest possible temperature
Absolute Zero
The amount of heat(energy) necessary to raise the temperature of 1lb of water 1°F
BTU (british thermal unit)
The amount of heat necessary to raise the temperature of 1g of water 1°C
Calorie
The metric temperature scale on which ice melts at 0° and water boils at 100°
Celsius Scale
A change in a substance from one form of matter to another
Change of Phase
A constant that indicates the amount by which a solid expands or contracts when its temperature is changed 1 degree
Coefficient of Linear Expansion
The change of phase from gas or vapor to a liquid
Condensation
A form of heat transfer from a warmer part of a substance to a cooler part as a result of molecular collisions, which cause the slower-moving molecules to move faster
Conduction
A form of heat tranfer by the movement of warm molecules from one region of a gas or a liquid to another
Convection
The temperature at which air becomes saturated with water vapor and condensation occurs
Dew point
The process by which high-energy molecules of a liquid continually leave its surface
Evaporation
The U.S. temperature scale on which ice melts at 32° and water boils at 212°
Farenheit Scale
The change of phase from liquid to solid. Also called solidification.
Freezing
The change of phase from solid to liquid. Also called melting.
Fusion
A form of internal kinetic and potential energy contained in an object associated with the motion of its atoms or molecules and which may be transferred from an object at a higher temperature to one at a lower temperature
Heat
The heat required to melt 1 g or 1 kg or 1 lb of a liquid
Heat of Fusion
The amount of heat required to vaporize 1 g or 1 kgor 1 lb of a liquid
Heat of Vaporization
A pump containing a vapor(refrigerant) that is easily condensed to a liquid when under pressure. produces heat during compression and cooling during vaporization.
Heat pump
The metric absolute temperature scale on which absolute zero is 0 K and the units are the same as on the Celsius Scale
Kelvin Scale
The amount of heat necessary to raise the temperature of 1 kg of water 1°C
Kilocalorie
The relationship between heat and mechanical work
Mechanical Equivalent of Heat
The change of phase from solid to liquid. Also called fusion.
Melting
When two substances at different temperatures are "mixed together", heat flows from the warmer body to the cooler body until they reach the same temperature. Part of the heat lost by the warmer body is transferred to the cooler body and to surrounding objects. If the two substances are well insulated from surrounding objects, the heat lost by the warmer body is equal to the heat gained by the cooler body.
Method of Mixtures
A form of heat transfer through energy being radiated or transmitted in the form of rays, waves, or particles
Radiation
The U.S. absolute temperature scale on which absolute zero is 0°R and the degree units are the same as on the Farenheit scale
Rankine Scale
Ratio of the actual amount of vapor in the atmosphere to the amount of vapor required to reach 100% of saturation at the existing temperature
Relative humidity
The change of phase from liquid to solid. Also called freezing.
Solidification
The amount of heat necessary to change the temperature of 1kg of a substance by 1°C in the metric system or 1lb of a substance by 1°F in the U.S. system
Specific Heat
A measure of the hotness or coldness of an object
Temperature
The ability of a material to transfer heat by conduction
Thermal Conductivity
The change of phase from liquid to a gas or vapor
Vaporization
A measure of a liquid's ability to vaporize. The more volatile the liquid, the greater is its rate of evaporation
Volatility
If the temperature of a gas is constant, the volume is inversely proportional to the absolute pressure, V/V'=P'/P
Boyle's Law
If the pressure on a gas is constant, the volume is directly proportional to its Kelvin or Rankine temperature, V/T = V'/T'
Charle's Law
A commonly used reference in gas laws, Standard temperature is the freezing point of water. Standard pressure is equivalent to atmospheric pressure
Standard Temperature and Pressure (STP)
D/D' = P/P' or DP' = D'P
Boyle's Law