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90 Cards in this Set
- Front
- Back
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What is force?
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Force is a push and pull that causes a change in shape or a change in motion.
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What is the formula for force?
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Force equal mass times acceleration
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What is mass?
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Mass is the total amount of matter in an object, as measured in grams(SI) or pound-mass(English).
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What is weight?
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Weight is a measurement of gravity times mass.
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What is the gravity on earth?
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Gravity on earth is 9.8 meters/second^2
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What is torque?
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Torque is force-like quantity in rotational mechanical systems.
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What is net force?
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sum of the two force.
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How do you find density?
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dividing mass by volume.
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What is hydrometer?
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used to measure density or specific gravity in liquids.
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What does manometer use for?
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to measure pressure differences.
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what is absolute pressure measure in?
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reference to vacuum (zero pressure)
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what does gaga pressure measure in?
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relative atmospheric pressure.
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what is weight density?
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ratio of an object's weight to it volume.
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How many forms does voltage have?
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AC & DC
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where does DC come from?
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Batteries
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what is formula for work?
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work equal force times distance
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what is input work?
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done by human
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what is output work?
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work done by system
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what is spring scale used for?
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measure input and output force
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what does one radian equal?
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57.3 degrees
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what is linear mechanical work?
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preformed when mass moved in straight line.
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what is angular mechanical work?
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preformed when mass around axis or rotation
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what is a closed system?
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hydraulic brake system
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what is formula for fluid work?
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W=Dp*V
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what is Dp?
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pressure differences
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what is V?
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volume
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how can you find the cross-section of a cylinder?
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times 0.7854 by diameter^2
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is there linear or angular fluid work?
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NO
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what id basic unit for electrical work?
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joules
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A coulomb is a quantity of charge equal to?
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6.25 times 10^18 electrons
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what is rate?
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displacement-like quantity divided by elapsed time.
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What does velocity measure?
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linear mechanical work
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what is velocity?
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vector
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what is speed?
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similar to velocity
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what does angular expressed?
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radian per second(SI) or rev. per min.(English)
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one rev equal?
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6.28 radians
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a stroboscope?
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is used to measure angular rate
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what is acceleration?
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rate at which speed increases or decreases
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what is unit of acceleration?
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foot/second^2
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volume flow rate symbolized?
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Qv
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what is Dewar flask?
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contain and store heat energy
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what is thermocouple?
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measure heat flow rate.
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what is unit of heat?
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BTU(English) calorie(SI)
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what is viscosity?
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substance related to thickness
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one milliampere equal?
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1/1000 amps(or .001amps)
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resistance equal?
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force-like quantity divided by rate
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what are two forms of resistance?
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friction and drag
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what is the equation for friction?
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f equal force times coefficient of friction
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what is sliding friction?
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must overcome to start an object in motion
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what is static friction?
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greater then kinetic friction
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what is kinetic friction?
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keep a moving object in motion
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how is resistance generated?
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by solid moving through a fluid as known as fluid resistance
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what is laminar flow?
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opposite of turbulent
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how is laminar flow move in object?
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around object through layers
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what is the formula for fluid resistance?
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Rf=Dp/Qv
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what is conductor?
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material such as copper and solder
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what is insulators?
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plastic and ceramic
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what is most streamline shape?
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teardrop
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what is semi-conductor?
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material such as silicon
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what is the formula for thermal resistance?
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Rt=DT/Qh
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what is energy?
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ability to work
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what if form of energy?
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heat
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what is potential energy?
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energy store in mechanical, fluid, or electrical device
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what is the formula of potential energy?
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Ep=force*height
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what is it in newton?
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mass*gravity=weight
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what is elastic potential energy?
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energy that object has because its shape
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what unit is spring constant?
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k
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what is formula for k=force?
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k=force/distance
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what is kinetic energy?
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moving object in motion
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what is v?
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velocity
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what is electrical energy?
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is potential energy and kinetic energy
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what is capacitance?
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electronic energy device
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how is capacitance calculated?
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C=q/v
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what is inductor?
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store electrical energy
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what is the formula for henries?
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Ep=(1/2)LI^2
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what is power?
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rate of doing work
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equation for power?
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P=work/time
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one watt equal?
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one joules per second
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one horsepower equal?
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550 foot-pound/second
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one horsepower equal?
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746watts
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what is power measure?
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foot=pounds/second(English), horsepower(English), watts(SI)
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what is unit of energy?
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kilowatts
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one watts equal?
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one volt times one amp
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what is rotational mechanical system?
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power equal torque times angular rate
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what is it in fluid system?
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power equal pressure differences times flow rate
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what is unit of kilowatt?
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unit of energy not power
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p=v*i is express by?
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power equal one volt times one coulomb divided by one second
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what is rotational mechanical system?
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mechanical work in rotational form
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P equal?
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power
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DPequal?
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pressure differences
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