Scientific Notation & Metric Converstions
Motors
Generators
Standby Power
Misc
100
4.5 x 103 in standard notation
What is 4500?
100
produce _____ energy from _____ energy
What is produce mechanical energy from electrical energy?
100
produce _____ energy from _____ energy
What is produce electrical energy from mechanical energy?
100
definition of standby power
What is electrical power used by a device when it is not performing its primary function (i.e., turned off or in standby mode)?
100
3 ways to increase the strength of an electromagnet
What is 1) increase the number of windings, 2) use an iron core, 3) increase the diameter of the core?
200
0.000973 in scientific notation
What is 9.73 x 10-4
200
parts of the motor that slides along the commutator to conduct electrical current from the power source
What are brushes?
200
conductor loop that spins
What is armature?
200
unit representing the amount of 1000 units of electrical power used in one hour
What is kilowatt-hour?
200
What is step-up transformer?
300
3340 mL = _______ L
What is 3.340 L?
300
the purpose of the commutator (include the word electromagnet)
What is to cause the current to alternate in order to reverse the polarity of the electromagnet?
300
type of current produced by a generator
What is alternating current?
300
amount of money a family spends each year on standby power if 12% of their $100/month electric bill is spent on standby power
What is $144?
300
the reason you can't remove all of the insulation on the axles of the motor/generator you built
What is to allow the electromagnet to turn off so that inertia and gravity cause the coil to keep spinning?
400
0.448 hg = ____ cg
What is 4480 cg?
400
The two parts of electromagnetic induction
What is 1) Magnetic fields can produce electrical current in conductors. 2) Electricity can produce a magnetic field and cause iron and steel objects to act like magnets.
400
3 types of power plants that use steam or hot water to turn a turbine in a generator
What is nuclear, coal, natural gas?
400
a device that uses 20 W of power in standby mode releases this much carbon dioxide into the atmosphere if it is left in standby mode for 30 days (1.21 lbs of CO2 released per kWh)
What is 17.4 pounds of carbon dioxide?
400
3 of the main greenhouse gasses
What is (any three) carbon dioxide, methane, nitrous oxide, and water vapor?
500
6.75 x 103 meters = _____ kilometers
What is 6.75 kilometers?
500
(AC or DC)What is AC motor?
500
one way of generating electricity that does NOT use a generator
What is solar power?
500
3 signs a device might use standby power
What is (any 3)
Device has a clock display
Device has a light that stays on even when it’s off
Device is warm to the touch after being off for a few hours
Device operates with a remote control
Device has an “instant-on” feature
500
3 observations that support that the global climate change is occuring
What is 1) Increases in global sea and air temperatures, 2) Widespread melting of snow and ice, 3)Rising global sea level?