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134 Cards in this Set
- Front
- Back
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force
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mass times acceleration
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force is
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a push or pull
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mass is
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total amount of matter in a object
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weight is
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measurment of gravity times mass
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torque is
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force like quantity in rotational mechanical system
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net force is
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when force act in the same direct
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prime movers are
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force like quanties that act in the same ways
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density
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mass divided by volume
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hydrometer
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used to measure density
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pressure
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increases with dept
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manometers
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used to measure pressure difference
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two types of fluids
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liquad and gas
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gasses are
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compressible
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pressure increase with what
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depth
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abosolute pressure is measured in
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reference to a vacumm
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weight density is
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the ratio of an object
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voltage comes in two factors
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dc and ac
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voltometers measures
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voltage differnce
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multimeters measures
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voltage
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positive pole is
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anode
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electrical circuits contain a
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source,conductor.load
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temperature differnce acts as a
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prime mover
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heat is a form of
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energy
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temperature is the
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measure of the average energy of motion
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thermocouples use
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three wires of two differnt metals
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the degree is placed in front of the
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f or c
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work equals
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force times distance
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input work
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work going into a system
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output work
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work done by the system
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efficiency
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output divided by input
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spring scales
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used to mesasure input and output force
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work equals
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turque times the anglr
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english unit for work
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foot pound
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si unit for work is
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newton meter
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linear mechanical work
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mass moved in a straight line
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angular mechanical
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mass moved around an axis
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mechanical work
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causes object to start moving
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fluid work
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w=dp x v
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when given height
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fluid system raises
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closed fluid system
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fluid is reused
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there is no such thing as
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linear fluid
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pressure exerted is
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work done by the piston
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cross sectioanl of a cylinder
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.7854time diameter
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electrical work is
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ew=v x q
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electrical charge
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amperes by time
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basic unit of electrical work is
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1 joule=1 volt
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input work
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will be given in joules
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rate is
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displacement like quanhtity divided by elapsed time
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velocity measures
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linear mechanical work
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speed is similar to
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velocity
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which has a higher pressure rate
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small or large pipe
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electrical rate
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amount of charge moved
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electricial current is smybolised by
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i
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one milliampere equals
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.001
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one microampere
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.000001
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ammeter measures what
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current
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hertz measures
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frequency
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oscilloscope
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frequency
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heats symbolised by
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Qh
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heat flow
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amount of energy transferred
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units of heat are
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btu
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dewar flask
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contain energy
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thermocouple
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measure heatflow rate
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equation for resistance
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force divided by rate
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resistance in a mechanicla system
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friction and drag
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equation for force
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force times friction
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drag resistance
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force divided by vilosity
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drag resistance
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disruption
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turbulence
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fyling
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sliding friction
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must overcome
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kinetic friction
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must overcome
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static friction
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greater
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friction reduction
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lubrication
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resistance
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solid moving
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laminar
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flow is opposinet of turbulent flow
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fluid resistance
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transporting liquad by heating it
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rf=
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dp/qv
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electrical resistance
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voltage/electrical
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re=
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dv/i
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conductors are
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copper
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insulators are
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plastic
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semi-conductors
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silicon
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resistivity
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quality of a material
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series circuit
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total resistance
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parrell circuit
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found with a formula
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themral resistance
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opposite to flow rate
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thermal resistance
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rt=dt/qh
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thermal conductitivty
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quality of a material
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r vaule
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r factor
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rt=
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i/ka
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energy
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to do work
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energy
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used to overcome ressistance
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p energy
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stored in mechanicla energy
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ep=
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f times h
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gravitational energy
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earths gravity
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elastic energy
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has its shape becuase of it
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k=
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f/d
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ep=
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kd2
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ep=
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weight of water
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weight of water
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62.4
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kinetic energy
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motion possed by a moving body
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ek=
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1/2mv2
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ek=
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1/2iw2
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total energy
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sum of p energy and k energy
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electricial energy
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movements of electricail charge
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capacitors
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measured in faurds
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capacitors
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eletronic devices
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inductances
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measured in henries
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efficiency less than
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100 percent
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h=
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mcDT
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calories are
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units of energy
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heat
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is added to or subteracted to from a substance
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conduction
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movment of heat energy
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convection
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transfer of heat energy
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radiation
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transfer of heat energy by electromagnetic
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power
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rate of doing work
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p=
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work/time
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power measure in
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foot per second
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power measured in
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watts
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power measured in
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horsepower
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one watt equals
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one joule
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one horsepower equals
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550 foot pounds
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one horsepower equals
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746 watts
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p=
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v time i
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p=
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t times w
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p=
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dp times qv
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gravity on earth is
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9.8 meters
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density of water is
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62.4
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one radian equals
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57.3 degress
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one revolution
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360 degress
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acceleration english unit
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foot second
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acceleration si unit
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meter second
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fluid system symbolised by
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qv
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i joule eqauls
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1 volt times coulomb
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