Vocabulary
A regular pattern of motion that carries energy is also known as a __________________.
Wave
v = frequency x wavelength
v = 10 Hz x 2 m
v = 20 m/s
What is the wave properties that measures the distance between crest to crest or trough to trough?
Wavelength
As frequency increases, wavelength decreases. Is this relationship direct or indirect? Explain how you know.
This is an indirect relationship because as one variable goes up, the other variable goes down.
Any solid, liquid, or gas:
Examples: water, metal, air, oxygen, helium, soda, the ground, etc.
What is a medium?
A medium is the matter a wave travels through. They can be solids, liquids, or gases.
Calculate a wave´s speed with a wavelength of 8 m and a frequency of 4 Hz.
v = frequency x wavelength
v = 4 Hz x 8 m
v = 32 m/s
Which wave property represents wave height?
Amplitude
Look at the data below. What is the relationship between wavelength and frequency?
Wavelength: Frequency:
1. 4.0 m 1.0 Hz
2. 3.5 m 1.5 Hz
3. 2 m 2.0 Hz
4. 1.5 m 2.5 Hz
As you decrease the wavelength, the frequency of a wave increases.
What happens to the amount of energy in a wave as the amplitude increases?
The higher the amplitude of a wave, the greater the amount of energy the wave has.
Taller wave = more energy.
Name the two types of mechanical waves we have learned about in class.
Transverse and Longitudinal
Calculate a wave´s frequency if the wave has a wavelength of 30 m and a speed of 60 m/s.
f = velocity/frequency
f = 60 m/s / 30 m
f = 2 Hz
The highest point on a wave is the ___________.
Crest
You are completing a wave simulation on the computer. You are changing the amplitude of a wave to see if amplitude effects a wave´s speed.
Amplitude: Wave Speed:
1. .75 m 4 m/s
2. 1.00 m 4 m/s
3. 1.25 m 4 m/s
Does amplitude effect wave speed? How do you know?
No, amplitude does not effect wave speed. I know this because the data shows wave speed stays at 4 m/s as you change amplitude from .75 m to 1.25 m.
You are analyzing two waves. Wave E has a frequency of 20 Hz. Wave F has a frequency of 10 Hz. Which wave would have the greatest amount of energy?
The higher the frequency, the higher the wave´s energy, so Wave E would have the greatest amount of energy.
How often a wave occurs each second is also known as ____________________.
Frequency
A wave is moving at a velocity of 10 m/s and has a frequency of 1 Hz. Calculate the wave´s wavelength, given this information.
Wavelength = velocity/frequency
wavelength = 10 m/s / 1 Hz
wavelength = 10 m
The lowest point on a wave is the _____________.
Trough
Two transverse waves have the same frequency. Wave A has a height of 10 m while wave B has a height of 5 m. Which wave would have the most energy?
Wave A. Waves that have a great height (amplitude) have more energy.
What type of mechanical wave is a sound wave?
A sound wave is a longtiduinal wave.
Which type of wave has compresions and rarefactions?
Longitudinal waves
A sound wave has a wavelength of 100 m and is traveling at a velocity of 1,000 m/s. What is the frequency of the sound wave?
frequency = velocity/wavelength
f = 1,000 m/s / 100 m
f = 10 Hz
The position of a wave whent he medium has not been disturbed is known as the ____________ position.
Rest/resting
As you increase the frequency from 1.0 Hz to 3.0 Hz, the wavelength decreases.
True/False: In a transverse wave, waves travel from side to side (or left to right), but the matter (medium) only oscillates up and down.
True, picture a boat in the ocean. A boat moves up and down as waves pass. Energy moves through the medium (water) from side to side.