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141 Cards in this Set
- Front
- Back
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Force equals mass times ______.
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Acceleration
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A ____ is a push or pull that causes a change in shape or a change in motion.
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Force
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The total amount of matter.
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Mass
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_____ is the measurement of gravity times mass.
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Weight
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____ is a force-like quantity in rotational mechanical systems.
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Torque
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When forces act in the same direction the _____ ______ is the sum of the two forces.
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Net Force
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What are the prime movers in electrical, fluid, and thermal systems?
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Voltage, pressure difference, and temperature difference
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What is found by dividing mass by volume?
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Density
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What is used to measure density and specific gravity?
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Hydrometer
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Pressure is measured by dividing a unit of force by a unit of_____.
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Area
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_____ is used to measure pressure differences.
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Manometer
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Two types of fluid are ________ and _________.
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Hydraulic, pneumatic
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Gasses are compressable _____ are not compressable.
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Liquids
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____ increases with depth in a fluid but is not independent of volume.
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Pressure
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_______ _______ is measured in reference to a vacuum(zero pressure).
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Absolute Pressure
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Weight density is the ratio of an object's weight to its _____.
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Volume
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Voltage comes in what two forms?
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DC and AC
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What measure voltage difference?
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Voltmeter
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What measures voltage, ampherage, and resistance?
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Multimeter
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What is the positive and negative pole in a baterry refered as?
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Anode, cathode
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_____ is used to measure pressure differences.
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Manometer
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Two types of fluid are ________ and _________.
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Hydraulic, pneumatic
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Gasses are compressable _____ are not compressable.
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Liquids
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____ increases with depth in a fluid but is not independent of volume.
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Pressure
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_______ _______ is measured in reference to a vacuum(zero pressure).
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Absolute Pressure
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Weight density is the ratio of an object's weight to its _____.
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Volume
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Voltage comes in what two forms?
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DC and AC
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What measure voltage difference?
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Voltmeter
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What measures voltage, ampherage, and resistance?
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Multimeter
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What is the positive and negative pole in a baterry refered as?
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Anode, cathode
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What acts as a prime mover in thermal systems?
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Temperature difference
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What is a form of energy charcterized by the vibrating movement of atoms and molecules?
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Heat
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________ is the measure of the average energy of motion of molecules in a substance.
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Temperature
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____ use three wires of two different metals to measure temperature.
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Thermocouple
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where is the degree placed when when giving temperature difference?
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after
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Work equals force times ______.
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Distance
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_____ work is work going into a system.
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Input
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____ work is work done by a system.
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Output
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________ is output work divided by input work, multiplied by 100.
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Efficiency
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What are used to measure input and output force?
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Spring scales
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One radian equals how many degrees?
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57.3
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what is the basic English unit for work?
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Foot-pound
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What is the basic SI unit for work?
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Newton-meter
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what kind of work is preformed when a mass is moved in a straight line?
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Linear Mechanical work
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What kind of work is preformed when a mass is moved around a axis or rotation?
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Angular mechanical work
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____ ____ causes an object to start moving, stop moving, of change direction.
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Mechanical work
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______ ____ is equal to the pressure difference time th the difference in volume.
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Fluid work
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When given the hieght a fluid is raised, you must also know the ____ _______ of the fluid in order to calculate fluid work
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Weight Density
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in this fluid system the fluid is reused.
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Closed fluid system
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There is no such thing as linear or ______ fluid work.
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Angular
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______ exerted by a piston multiplied by the area of the piston face equals the work done by the piston.
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Pressure
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The cross-sectional area of a cylinder can be found by multiplying ______ by the diameter^2.
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0.7854
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What is done when a voltage moves a specified amount of electrical charge.
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Electrical work
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A coulomb equals how many electrons?
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6.25 X 10^18
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Amperes times time equals what?
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Electrical charge
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What is the basic unit of electrical work?
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Joule
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Input work by an electrical pump will be given in what?
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Joules
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______ is a displacement like qualntity divided by elasped time.
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Rate
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What is the measure of linear meachnical work?
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Velocity
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_____ is similar to velocity, but it is scalar.
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Speed
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What are the English and
SI units for linear mechanical rate? |
foot per second, meter per second
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_____ _____ is expressed in radians per second.
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Angular rate
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How many radians are in one revolution?
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6.28
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What is used to measure angular rate?
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Stroboscope
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________ is the rate at which speed increases or decreases.
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Acceleration
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Flow rate is the volume of fluid moved in a given period of time in what system?
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Fluid system
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What are the units of fluid flow?
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gallon/minute, cubic meters per second
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____ is the quality of a substance related to its thickness.
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Viscosity
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Under the same pressure, a larger pipe will have a ______ flow rate than a smaller pipe.
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Higher
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______ ______ is the amount of charge moved in a given period of time.
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Electrical rate
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Electrical current is symbolized by an__
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I
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One milliampere is equal to________.
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1/1000 amps
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One microampere is equal to________.
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1 * 10^-6
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What is used to measure electrical current?
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Ammeter
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____ is a measure of frequency in alternating current.
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Hertz
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An _________ can measure frequency as well as voltage waveform.
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Oscilliscope
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Heat flow rate is symbolized by a __.
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QH
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____ ______ ______ is the amount of heat energy transferred through a substance in a unit of time.
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Heat flow rate
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units of heat are...
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Btu, calorie
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What is used to contain heat and store heat energy?
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Dewar flask
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What type of thermometer can be used to measure heat flow rate?
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Thermocouple thermometer
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What is the unifying equation for resistance?
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Resistance= force-like quantity / rate
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what are the two forms of mechanical resistance?
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Friction and Drag
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What is the symbol for the coefficient of friction?
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Mew
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What is the equation for drag resistance?
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resistance equals force divided by velocity
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what is the disruptionof airflow as an object move referred to as?
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Turbulence
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What must be overcome to start an object in motion?
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sliding friction
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What must be overcome to keep an object in motion?
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Kinetic Friction
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friction can be reduced by adding .....
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lubricants
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______ friction is always greater than _______ friction.
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Static, Kinetic
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Electrical current is symbolized by an__
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I
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One milliampere is equal to________.
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1/1000 amps
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One microampere is equal to________.
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1 * 10^-6
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What is used to measure electrical current?
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Ammeter
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____ is a measure of frequency in alternating current.
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Hertz
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An _________ can measure frequency as well as voltage waveform.
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Oscilliscope
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Heat flow rate is symbolized by a __.
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QH
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____ ______ ______ is the amount of heat energy transferred through a substance in a unit of time.
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Heat flow rate
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units of heat are...
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Btu, calorie
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What is used to contain heat and store heat energy?
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Dewar flask
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Resistance generated by a solid moving through a fluid is known as ....
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fluid resistance
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What is the opposite of turbulent flow?
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Laminar flow
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Is fluid resistance proportional to the length of the pipe?
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yes
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What is the formula for calculating fluid resistance?
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Rf=Dp/Qv
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What is equal to voltage difference divided by electrical current flow?
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Electrical resistance
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What is Re=DV/I ?
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ohms law
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_______ _______ results when electrons run into metal atoms inside wires.
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Electrical resistance
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What are used to control amount of of voltage in a circuit?
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Resistors
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Materials such as copper and solder that permit the free flow of electrons
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conductors
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Materials such as plastic and ceramic that do not permit the free flow of electrons.
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Insulators
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materials, such as silicon, that allow some current to pass through.
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Semi-conductors
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the quality of a material that describes how much it permits electricity to flow through it.
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Resistivity
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total resistance is found by adding the resistance valves in the circuit.
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Series circuit
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total resistance is found with the following formula Rtot=(R1R2)/(R1+R2)
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Parallel circuit
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The opposition to the flow of heat through a material.
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Thermal resistance
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What is the equation for thermal resistance?
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RT=DT/QH
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_____ ____ is the quality of a material that describes how well it transmits heat.
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Thermal conductivity
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the rating of a material based on its ability to resist heat flow.
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R-value
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the ability to do work
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Energy
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Energy stored in a mechanical, fluid, or electrical deviceby virtue of a change in shape.
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Potential Energy
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Resistance generated by a solid moving through a fluid is known as ....
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fluid resistance
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What is the opposite of turbulent flow?
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Laminar flow
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Is fluid resistance proportional to the length of the pipe?
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yes
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What is the formula for calculating fluid resistance?
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Rf=Dp/Qv
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What is equal to voltage difference divided by electrical current flow?
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Electrical resistance
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What is Re=DV/I ?
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ohms law
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_______ _______ results when electrons run into metal atoms inside wires.
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Electrical resistance
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What are used to control amount of of voltage in a circuit?
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Resistors
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Materials such as copper and solder that permit the free flow of electrons
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conductors
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Materials such as plastic and ceramic that do not permit the free flow of electrons.
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Insulators
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Electrical current is symbolized by an__
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I
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One milliampere is equal to________.
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1/1000 amps
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One microampere is equal to________.
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1 * 10^-6
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What is used to measure electrical current?
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Ammeter
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____ is a measure of frequency in alternating current.
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Hertz
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An _________ can measure frequency as well as voltage waveform.
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Oscilliscope
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Heat flow rate is symbolized by a __.
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QH
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____ ______ ______ is the amount of heat energy transferred through a substance in a unit of time.
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Heat flow rate
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units of heat are...
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Btu, calorie
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What is used to contain heat and store heat energy?
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Dewar flask
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K=F/d
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spring constant
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