Show:
Waves
Light
Reflection
Circuits
Magnets
100
What is a mechanical wave?
A disturbance in matter that carries energy from one place to another.
100
How are electromagnetic waves different from mechanical waves?
How they are produced & how they travel.
100
What is the law of reflection?
The angle of reflection is equal to the angle of incidence.
100
What is an electrical conductor?
A material which charge can flow easily.
100
What is a circuit breaker?
A switch that opens when the current in a circuit is too high.
200
How are mechanical waves produced?
When a force of energy causes a vibration to travel through a medium.
200
What is the speed of light in a vacuum?
3.00x10^8 m/s
200
What type of image does a plane mirror make? Why?
Virtual, the rays of light strike you and reflect from the mirror into your eyes.
200
What is resistance?
Opposition to the flow of charges.
200
What makes material magnetic?
Its magnetic domains are aligned.
300
Three types of mechanical waves?
Tranverse, longitudinal, and surface.
300
How electromagnetic waves vary?
Wavelength and frequency.
300
What are two factors that affect the strength of an electric field?
The amount of change and the distance from the charge.
300
What is the formula for Ohm's law?
V=IxR R=V/I
300
What is a solenoid.
A coil of current-carrying wire that produces a magnetic field.
400
Name one example of each type of wave.
Longitudinal: Compressions & Rarefractions Transverse: Troughs & Crests Surface: Oceans
400
Does light behave like a wave, particle, or both?
Both
400
List the three methods of charge transfer.
Friction, contact, and induction.
400
What are the units for current, resistance, and voltage?
Current=Amps Voltage=Volts Resistance=Ohms
400
Name six sources of electrical energy in the U.S.
Coal, water, natural gas, wind, nuclear energy, and potroleum.
500
The height of wave is called _________.
Crest
500
Longest to shortest, list the kinds of waves in the electromagnetic spectrum.
Radio, infared, visible light, ultraviolet, x-rays, and gamma.
500
What type of image can be produced by a concave mirror? Convex mirror?
A concave mirror produces virtual or real images. Convex produces only virtual.
500
What is a battery?
A device that converts chemical energy to electrical energy.
500
What does a generator do?
Converts mechanical energy to electrical energy by relative motion in a coil of wire.