why does the wave go up and down?

Doesn't have to. Depends on how the energy is moving.

What gives the wave energy

A wave is one way of how energy travels, so the wave is energy itself. How the energy travels as a wave, such as its velocity, depends on the type of energy however. A pulse of electromagnetic energy, for example, such as lighting, will travel at a higher frequency than that of sound energy.

how many sound waves does an a hearing aid produce

Keep in mind that hearing aids can only address hearing loss in the frequency range below 8,000Hz. They're best at amplifying the volume within that range, but only as long as you can actually hear those frequencies

can a wave length be measured

Yes. There are special devices to do so.

I like turtles. They are cool.

Sorry my younger brother was tipping.

Main content

Course: Middle school physics > Unit 4

Lesson 1: Wave properties

Wave properties

Google Classroom

Review your understanding of wave properties in this free article aligned to NGSS standards.

Key points:

A wave is a repeating disturbance that travels through matter or space transferring only energy.
Below is a model of a wave.

A wave’s crest is its highest point, and its trough is its lowest point.
A wave’s amplitude is the maximum distance (positive or negative) a wave reaches from its rest position.
Wavelength is the distance between the same spot on two sections of a wave.
A wave’s frequency can be measured by how many crests (or how many troughs) pass a location in a certain amount of time.
A wave with a larger frequency has more energy. If a wave’s frequency doubles, its energy also doubles.
A wave’s energy is proportional to the square of its amplitude. So, if a wave’s amplitude doubles, its energy increases by four times, because $2^{2} = 4$ ‍.

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Haris Qamar
Posted 2 years ago. Direct link to Haris Qamar's post “Is there a certain name f...”
Is there a certain name for the starting point of a wave?
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- Technoblade
  Posted a year ago. Direct link to Technoblade's post “is it the period?”
  is it the period?
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2706356
Posted a year ago. Direct link to 2706356's post “What ocean has waves with...”
What ocean has waves with the higest frequency?
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- hirodavidson
  Posted a year ago. Direct link to hirodavidson's post “not that type of wave bro”
  not that type of wave bro
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xavier.calhoun
Posted 2 years ago. Direct link to xavier.calhoun's post “why does the wave go up a...”
why does the wave go up and down?
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- Advait Jay
  Posted a year ago. Direct link to Advait Jay's post “Doesn't have to. Depends ...”
  Doesn't have to. Depends on how the energy is moving.
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  (20 votes)
white-durden.michiah
Posted 2 years ago. Direct link to white-durden.michiah's post “What gives the wave energ...”
What gives the wave energy
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(9 votes)
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- spideroo1023
  Posted a year ago. Direct link to spideroo1023's post “A wave is one way of how ...”
  A wave is one way of how energy travels, so the wave is energy itself. How the energy travels as a wave, such as its velocity, depends on the type of energy however. A pulse of electromagnetic energy, for example, such as lighting, will travel at a higher frequency than that of sound energy.
  Button navigates to signup page
  (15 votes)
DRAKEB
Posted a year ago. Direct link to DRAKEB's post “can a wave length be meas...”
can a wave length be measured
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- jcsmeow
  Posted a year ago. Direct link to jcsmeow's post “Yes. There are special de...”
  Yes. There are special devices to do so.
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  (12 votes)
R M
Posted 10 months ago. Direct link to R M's post “Why are hearing aids made...”
Why are hearing aids made of plastic (ignore this question)? Is it possible if we put aluminum in the form of a hearing aid in the ear that we will hear better?
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- JMP299
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  Not to be an answer....
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DERENIKL
Posted 9 months ago. Direct link to DERENIKL's post “how many sound waves does...”
how many sound waves does an a hearing aid produce
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(9 votes)
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- tristansaucierandwitches
  Posted 6 months ago. Direct link to tristansaucierandwitches's post “Keep in mind that hearing...”
  Keep in mind that hearing aids can only address hearing loss in the frequency range below 8,000Hz. They're best at amplifying the volume within that range, but only as long as you can actually hear those frequencies
  Button navigates to signup page
  (5 votes)
Aatishthepro
Posted 10 months ago. Direct link to Aatishthepro's post “Frequency is how many cre...”
Frequency is how many crests (or how many troughs) pass a location per second not vaguely "in a certain amount of time" as per the official definition.
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(6 votes)
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Issaia
Posted 3 months ago. Direct link to Issaia's post “i get it but my head”
i get it but my head
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AydenF
Posted 4 months ago. Direct link to AydenF's post “I like turtles. They are ...”
I like turtles. They are cool.
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- AydenF
  Posted 4 months ago. Direct link to AydenF's post “Sorry my younger brother ...”
  Sorry my younger brother was tipping.
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  (6 votes)