What's the equation for the volume of the cylinder?
V (volume)= pi multiplied by R squared multiplied by the height
Example: radius is 6" height is
... [Show More] 30
V=3.1416•6•6•30
A drill draws a current (I) of 4.5 amps and resistance of 16.0 ohms, how do You find the power(watts)?
P=I squared (amps) multipled by R(resistance)
Example:P=4.5•4.5•16.0
4.5•4.5=20.25
20.25•16.0=324
P=324
What is the equation for distance?
D=R•T
D(distance=R(rate) multiplied by T(time)
What is the equation for pressure?
pressure = force/area
P(pressure)= F(force) divided by A(area)
What is the equation For voltage?
E=I•R
voltage (E) = current(I) x resistance(R)
What is the equation for current or amps (i)?
I=E/R
i (current in Amps)
R=(resistance in ohms)
E(volts)
What is the equation for series voltage?
Et=E1=E2=E3
ET(total voltage)
What is the equation for series resistance?
Rt=R1+R2+R3
R=resistance
What is the equation for series current?
It=i1=i2=i3
it=total current in amps
I=current in amps
How do you calculate resistance of a wire?
R=P•L/A
R=resistance of the wire
P= resistivity constant of the wire
L=length of the wire
A=cross sectional area of the wire
What is the equation for parallel voltage?
Et=E1=E2=E3
E=voltage
ET=total voltage
What is the equation for parallel current?
iT=i1+i2+i3
I=current in amps
iT=total current in amps
What is the equation for parallel resistance?
RT= 1 divided by 1/R1 + 1/R2 +1/R3
Add each fraction (1/R1-1/R3)
Divide the answer of each resistance by 1
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What is the equation for pulley relationship?
(Diameter of First pulley) •(RPM of first pulley) (diameter of second pulley) •(RPM of second pulley)
Take RPM of the first pulley and multiply it by the diameter of the first pulley, then divide that by the diameter of the second pulley.
What is the equation for sprocket relationship ?
(Number of teeth in sprocket1)•(RPM of sprocket 1)= (number of teeth in sprocket 2)•(RPM of sprocket 2)
Take the number of teeth and multiply it by the RPM, then divide it by the number of teeth in sprocket 2
What is the equation for leverage(lever principle)?
F1D1=F2D2
F1=weight to be lifted
D1=distance from pivot point
F2=weight applies to end of fulcrum
D2= distance from the pivot point where force is applied
How many centimeters (CM) are in an inch?
There are 2.54 cm in one inch
How many centimeters (CM) are in a foot?
There are 30.5 CM in a foot (12")
How many inches in a millimeter (MM)?
There are .0394 inches in a millimeter(MM)
How many pounds are in a kilogram(KG)?
There are 2.20KG in one pound
How many liters in a gallon?
3.79L = 1 gallon
How many liters are in a quart?
There are .95 liters in a quart
How many quarts in a liter?
1.06 quarts are in a liter
What is the square inches of 1 square foot?
1 square foot= 144 inches squared
What is the equation for area of a square?
A=Bsquared
Can a wet surface act as a conductor for electricity?
Yes, wet surfaces conduct electricity
When using portable lights what must they be made of?
They must be made of non conductive material
Does moisture increase the severity of electric shock?
Yes, moisture raises the severity of electrical shock
What is a danger Of even a slight electrical shock?
Injury due to involuntary movement following electrical shock.
How can the third wire of an extension cord best be described?
It prevents the case or chassis of the supply device from becoming hot
How does a ground fault detector protect a worker using a power tool?
It removes power if leakage current develops in the cord or a tool
What should be done if a coworker is in contact with a live circuit?
Remove power or safely remove the victim from the source of power
What precautions should be taken when performing cleaning operations on elevator electrical equipment?
Remove power and lockout and tag out
What is the definition of voltage?
A measure of electrical energy or pressure The potential difference between a "hot" and "neutral" lead
What is the definition of current?
The rate of flow of charge/ the movement of the electrical energy
What is the definition of ampere(amps)?
Is the unit used as a measure of Current; the actual flow of electrons
What's is a milliampere(mA)?
A milliampere is 1/1000 of an ampere (AMP)
What is the definition of resistance?
Opposition or hindrance to the flow of electrons in an electric circuit.
What is the definition for a circuit?
A complete path for the flow of current
What is the definition of a conductor?
A conductor is a material which allows electricity to travel through it.
What is the definition of a watt?
unit of electric power or the measurement of electrical power
What is the outermost shell of an atom called?
The valence shell
The nucleus of an atom contains what?
neutrons and protons
The symbol E is used to represent what?
Voltage
What happens to the total resistance in a wire if it's length is double?
The resistance is doubled
What does it mean if atom has only one electron in the outer most shell?
Is it a good conductor
Between Atoms what do unlike charges do?
They attract eachother. - attracts +
What is the characteristics of a neutral Atom?
It has an equal amount of protons and neutrons
What is the name of the unit measuring current?
Ampere (I)
What is the direction of electron current flow?
Electrons move from the negative to positive
What is the unit that measures the quantity of electrons passing a given point?
A coulomb
In an electrical circuit what is the name of the unit used in measuring the potential difference across two points in a circuit?
Voltage
What is used to measure the opposition to current flow?
Ohms (resistance)
What happens to the total resistance in a wire if it's cross-sectional area is increased by four times?
The resistance is 1/4th
What is the equation for current?
I=V(E)/R
What is the equation for voltage?
voltage (E)= current(I) x resistance
What is the equation for resistance?
resistance (R)= voltage(E)/current (I)
If you double the current and resistance stays the same the voltage will be what?
The voltage will double
If you double the resistance in the current remains the same the voltage will be what?
The voltage will double [Show Less]