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60 Cards in this Set
- Front
- Back
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Sound is what type of wave?
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Longitudinal
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What type of waves are electromagnetic waves?
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Transverse
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The tallest point on a transverse wave is called the _____.
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Crest
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The lowest point on a transverse wave is called the ______.
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Trough
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The measurements from any two consecutive points on a transverse or longitudinal wave is called the ___________.
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Wavelength
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The height of the wave is called the __________.
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Amplitude
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Water waves crash into the shore 2 times every second. What is the frequency of the waves? *Don't forget the units!
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2 Hz
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The parts of the wave that are closest together on a longitudinal wave are called the ___________.
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Compressions
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The parts of a longitudinal wave that are farthest apart are called the __________.
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Rarefactions
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What happens to the amplitude when two waves interact with constructive interference?
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The amplitude increases.
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What happens to the amplitude of two waves when they interact with destructive interference?
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The amplitude decreases
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How do sounds originate?
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By a vibrating object.
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Sounds waves that have a frequency below 20 Hz are called ___________.
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Infrasonic waves (infrasound)
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What is the normal range for human hearing?
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20 Hz - 20,000 Hz.
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Sound waves that have a frequency above 20,000 Hz are called __________.
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Ultrasonic waves (ultrasound)
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In what type of medim do sound waves travel the fastest in? Why? vacuum, gas, liquid, or solid
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Solid
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In what type of medium do sound waves travel the slowest in? Why
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Gas...remember, sound doesn't travel in a vacuum -- there are no particles to vibrate!
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How is sound intensity measured?
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decibels
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Does a light-year measure distance or time?
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A light year measures the distance light travels in one year.
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What is the order of the electromagnetic spectrum from longest wavelength to shortest wavelength?
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RMIVUZG.....Red Monkeys In Vermont Use X-rays Good (Radio, Micro, Infrared, Visible, Ultraviolet, X-ray, Gamma)
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Do electromagnetic waves need a medium to travel through? *Hint...what type of wave are electromagnetic waves?
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NO! Electromagnetic waves are transverse waves!
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What type of waves are light waves? (visible light)
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transverse waves
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The color of an object depends on the color it __________.
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reflects
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What are the three additive primary colors of light?
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red, green, blue
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When red and blue are mixed, what color is produced?
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magenta
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When blue and green are mixed, what color is produced?
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cyan
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When red and green are mixed, what color is produced?
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yellow
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What are the 2 colors called when we can mix them and make white light?
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complimentary colors
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Why is the sky blue?
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High frequency light is scattered the most. Since violet light has the highest frequency, it is scattered the most. We don't see violet well, so we see a blue sky.
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Why are sunsets red?
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All of the high-frequency light has been scattered due to the position of the sun in the sky. Longer wavelengths and low frequency light is more prevalent, therefore we see a red/orange sunset.
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The term used to describe a wave that bounces back into it's original medium is called________.
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Reflection
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The law of reflection states.....
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the angle of incidence is equal to the angle of reflection
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What kinds of images can mirrors produce?
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real or virtual
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Where is a virtual image always located? *Hint...in front or behind the mirror
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Behind the mirror
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What happens in diffuse reflection?
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Light is scattered in all direction.
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Light bends when it moves into a new medium. This is called __________.
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refraction
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How does the speed of light change when it travels from air to water? How does the light bend, then?
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It slows down, so it bends towards the normal....remember FST.
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What is the charge of an electron?
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Negative
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What is the charge of a proton?
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Positive
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What is the charge of a neutron?
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Neutral
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What happens when opposite charges interact?
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They attract each other
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What happens when like charges interact?
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They repel each other
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A material that allows for the flow of electric charge well is called a _________.
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conductor
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A material that doesn't allow for the flow of charge well is called an ___________.
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Insulator
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A lightning strike is an example of charging by.....*Hint: contact, friction, induction ,polarization
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Induction
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An electric pressure that can produce a flow of charge or current with in a conductor is called _______________.
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voltage
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Charge will flow in a circuit when the circuit is closed and when there is a _____________.
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potential difference
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How is electric current measured? What are the units?
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Amperes (A)
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How is voltage measured?
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Volts (V)
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How is electric resistance measured?
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Ohms
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Why can birds sit on high voltage wires?
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Because there isn't a potential difference....they are not "grounded"
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How is electric power measured?
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Watts
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A complete path that allows for the flow of electric charge is called a ____________.
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circuit
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Define series circuit.
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A single path that allows for the flow of electric charge.
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Define parallel circuit.
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A circuit that has multiple pathways for current to flow.
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What happens if one device in parallel fails? Will the other devices work?
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The other devices will work...there are multiple pathways for current to flow in a parallel circuit.
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A diagram with symbols representing a ciruit is called a ____________.
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Schematic diagram
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What two mechanisms do we have to prevent overloading of a circuit?
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Fuses and Circuit breakers
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How do you find the total resistance of a circuit connected in series?
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Add up all the resistors
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How do you find the total resistance of a circuit connected in parallel?
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Take on of the resistors and divide the value in half.
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