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80 Cards in this Set
- Front
- Back
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Force equals ______ times acceleration.
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mass
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Force is a?
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push or pull
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Spring scales are used to measure?
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input and output work
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There is no such thing as what in work?
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linear or angular fluid work
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Speed is similar to?
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velocity
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A stroboscope is used to do what?
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measure angular rate
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The two forms of resistance in mechanical systems are?
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friction and drag
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________ friction must be overcome to start an object in motion.
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sliding
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_______ is the ability to do work.
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energy
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The formula for potential energy is?
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Ep= Force * Height
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_________ is the rate of doing work.
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power
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One __________ equals 746 watts.
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horsepower
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Convection is the transfer of what by movement of a fluid from one region to another.
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heat energy
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What are the units for energy?
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calories and Btu
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What is the formula for power?
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P =Force * Rate
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Mass is the total amount of _______ in an object.
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matter
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Weight is the measurement of gravity times_______.
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mass
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Gravity on earth is?
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9.8 meters/second^2
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_____ is the force-like quantity in rotational mechanical systems.
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torque
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What is the sum of two forces?
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net force
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Density is found by dividing what by volume.
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mass
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The two types of fluids are?
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hydraulic and pneumatic
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_________ __________ is the ratio of an objects weight to its volume.
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weight density
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________ measure voltage difference.
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voltmeters
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what is the positive pole in a battery called?
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anode
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The negative pole in a battery is called?
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cathode
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_____ is the vibrating movement of atoms and molecules.
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heat
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The degree symbol is placed _______ of the F or C when giving temperature.
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in front
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Work equals force times_______.
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distance
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_______ work is the work done by the system.
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ouput
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_______ work is the work going into a system, performed by a human or a motor.
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input
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One radian equals _______ degrees.
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57.3
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The basic english unit of work 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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1N*m equals?
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1 joule
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________ mechanical work is performed when a mass is moved in a straight line.
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linear
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________ mechanical work is performed when a mass is moved around a axis or rotation.
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angular
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(W=Delta P*V)
What does the delta p stand for? |
pressure difference
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Define electrical work.
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Is done when a voltage moves a specified amount of electrical charge.
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What is a coulomb?
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a quantity of charge
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What is a coulomb equal to?
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6.25*10^18
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A rate is a displacement like quantity divided by what?
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elapsed time
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_______ is the measure of linear mechanical work.
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velocity
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Units of linear mechanical rate in the English and SI system is?
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foot per second (English) and meter per second (SI)
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Angular rate is expressed in ________?
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radians per second (SI) or revolutions per minute (English)
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There are __________ radians in one revolution (360 degrees).
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6.28
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A __________ 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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Volume flow rate is symbolized as what?
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Qv
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Electrical current flow is symbolized as what and is measured in what units?
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I and amperes
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One milliampere is equal to_____ amps.
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1/1000 amps or .001 amps
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What does an oscilliscope do?
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measures frequency as well as voltage waveform
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A ____ _____ is used to contain and store heat energy.
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dewar flask
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A thermocouple thermometer can be used to do what?
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measure heat flow rate
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What is the equation for drag resistance?
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R=F/V
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________ friction must be overcome to keep a moving object in motion.
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kinetic
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Kinetic friction is always greater than static friction. True or False.
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false
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Friction can be reduced by the addition of what?
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lubricants
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Laminar flow is the opposite of what?
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turbulent flow
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What does electrical resistance represent?
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Re
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What is the ohm's law?
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the standard equation for calculating electrical resistance.
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_________ are used to control the amount of voltage in a circuit.
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resistors
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_______ are materials such as copper and solder that permits the free flow of electrons.
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conductors
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_______ are materials such as plastic and ceramic that do not permit the free flow of electrons.
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insulators
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What are semi-conductors?
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materials, such as silicon, that allow some current to pass through.
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_________ __________ is 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=Delta T/Qh
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Energy used to overcome resistance in a system is lost in the form of what?
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heat
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_______ _______ energy is energy that an object has because it has been raised against the gravitational pull of earth.
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Gravitational potential
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What is spring constant represented by?
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k
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What is the weight density of water?
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62.4 lb/ft^3
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Kinetic energy is the energy of motion possessed by a what?
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moving body
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Total energy in a system is equal to the sum of what?
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potential energy and kinetic energy
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________ are electronic devices consisting of conductors separated by insulators.
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capacitors
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What consists of a coil of wire wrapped around a core?
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inductor
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Inductance is measured in?
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henries
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Heat is calculated by what formula?
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H=mc*delta T
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Calories and Btu are units of what?
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energy
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What is a transfer of heat energy by movement?
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convection
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radiation is the transfer of what?
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heat energy by electromagnetic radiation.
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