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70 Cards in this Set
- Front
- Back
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force equals mass * what?
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acceleration
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what is force?
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a push or pull that causes a change in shape or motion
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voltmeters measure what?
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voltage difference
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the two types of fluids are?
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hydraulic and pnuematic
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are gases compressible?
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yes
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multimeters measure what?
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voltage, amperage, and resistance
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the positive pole in an electrode is called what?
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anode
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are liquids compressible?
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no
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density is found by:
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mass divided by volume
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manometers are used to measure:
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pressure differemces
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heat is characterized by:
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vibrating motion of atoms and molecules
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what is torque?
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force-like quanity in rotational mechanical system
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thermocouples use how many wires?
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3
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the negative pole is called:
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cathode
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a hydrometer is used to measure:
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density or specific gravity in liquids
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work equals:
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force times distance
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input work is performed by:
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a human or motor
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output work is:
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work done by the system
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spring scales are used to measure:
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input and output force
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the basic unit of work in the english system is?
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foot-pound
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the basic SI unit of work is:
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newton-meter
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when is linear mechanical energy performed?
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when a mass is moved in a straight line
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when is angular work performed?
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when a mass is moved in an axis or rotation
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mechanical work causes an object to:
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start moving, stpo moving, or change directions
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fluid work equals:
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pressure difference times volume moved
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in a closed system the fluid is:
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reused
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is there such thing as linear or angular fluid work?
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no
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when is electrical work done?
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a voltage moved a specifiedamount of electrical charge
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what is the symbol for charge?
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q
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what is the basic unit for electrical work?
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joule
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rate equals:
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displacement like quanity divided by elapsed time
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velocity is:
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the measure of linear mechanical work
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is speed scalar?
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yes
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what is the english unit for rate?
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foort per second
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what is the SI unit for rate?
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meter per second
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how many radians are in one revolution?
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6.28
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what is the english unit for angular rate?
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revolutions per second
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what is the SI unit for angular rate?
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radians per second
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the strobescope is used to measure?
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angular rate
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in fluid systems ,what is flow rate?
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volume of fluid moved in a given period of time
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volume flow rate is symbolized by:
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Qv
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what are the english units for fluid flow?
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gallons per minute
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a dewar flask is used to:
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store heat energy
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heat flow rate is symbolized by:
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Qh
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hertz is a measure of:
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frequency
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what is the unifying eqaution for resistance?
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forcelike quanity divided by a rate
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what are the two forms of resistance?
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friction and drag
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what is the equation for the force of friction?
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coefficent of friction times force
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what must be overcome to start an object in motion?
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sliding friction
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kinetic friction must be overcome to:
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keep an object in motion
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how can friction be reduced?
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lubricants
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what is fluid resistance?
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resistance generated by a solid moving through a liquid
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laminar flow is the opposite of what?
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turbulent flow
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what is an example of an conductor?
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copper
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what is an exapmle of an insulator?
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plastic
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what is a semi conductor?
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silicon
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what is resistivity?
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quality of a material that describes how muchit permits electricity to to flow through it
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what is thermal resistance?
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opposition to flow of heat through a material
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conductivity is what:
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inversely proportional to resistivity
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what is the equation for thermal resistance?
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delta t divided Qh
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what is energy?
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the ability to do work
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what is energy used for?
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overcome resistance
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what is the equation for potential energy?
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force times height
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what does k stand for?
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spring constant
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capitance is measured in:
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farads
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what are inductors?
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electronic devices that consists of coils of wire rapped around a core
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what are the units for I?
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amps
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what is the weight density of water?
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62.4 Lb/ft^3
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what is radiation?
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transfer of heat energy by electromagnetic radiation
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what are the units for energy?
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calories and BTU's
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