what are waves? waves = a transfer of energy from one place to another ex. = a water wave is a...

Upload: kellie-bryan

Post on 12-Jan-2016

215 views

Category:

Documents

2 download

Report

Download

Embed Size (px):

TRANSCRIPT

What are waves?

• Waves = a transfer of energy from one place to another

• Ex. = a water wave is a disturbance at the surface of the water.

• Ex. = a seismic wave is a moves through through the soil of earth

Can waves provide energy?

• Both of the previous waves can transfer their energy

• Water waves can move a boat up and down – this requires work (energy)

• Seismic waves can move a building back and forth and up and down

Page 4: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

What about sound waves?

• Sounds waves transfer energy with air pressure

• The sound travels outward in all directions from the source

• When it reaches your ear, it does work by moving your ear drum

Page 5: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Mechanical waves

• Everything we mentioned are described as mechanical waves

• These require a medium, such as water, air, even a rope or spring

Page 6: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Wave terms• Wave pulse –

produced if a source makes a single disturbance (like a bang)

• Period wave – if the source vibrates repeatedly, like a guitar string

Page 7: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Transverse wave• Particles in the medium,

like a rope, move up and down, but the wave moves back and forth.

Page 8: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Longitudinal wave• Particles move back

and forth as well as the wave, like in a slinky spring

Page 9: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

• Peak – each of the highest points of a wave

• Trough – each of the lowest points of a wave

• Amplitude – the distance from peak to trough divided by 2

Page 10: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Wavelength

• The wavelength is the length of the repeating pattern

• Could be from peak to peak

Page 11: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Frequency

• Frequency is number of waves that pass a certain point per unit of time

• We call this Hertz (Hz)

Page 12: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Period of wave

• The period is the time it takes just one wavelength to pass a point

Page 13: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Wave speed = how fast it moves

Speed will affect frequencyWatch this:

Page 14: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Calculating wavelength, Frenquency & Wave Speed

• f = 1/T where T is the period or time for 1 wave

• Remember speed = distance / time– What is our distance for waves? – What is our time?

• Wave speed = wavelength/period– V = /T we can substitute in f for 1/T

– To get: v = f *

Page 15: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Calculating wavelength, Frenquency & Wave Speed

• Example – The string of a piano that produces the note middle C vibrates with a frequency of 264 Hz. If the sound waves produced by this string have a wavelength in air of 1.30m, what is the speed of sound in air?

Page 16: What are waves? Waves = a transfer of energy from one place to another Ex. = a water wave is a disturbance at the surface of the water. Ex. = a seismic

Water, Waves, and Tides

Shallow Water Waves and Solitary Waves - Colorado …whereman/papers/Hereman...Shallow Water Waves and Solitary Waves Willy Hereman Department of Mathematical and Computer Sciences,

Kayde Ford Sean Esposito. Waves: Waves- a vibratory disturbance that travels through a material or space [ex: sound, water waves, light, heat waves A

14. Diffraction of Water Waves by Breakwatersauthors.library.caltech.edu/48243/1/Diffraction of Water Waves by... · 14. Diffraction of Water Waves by Breakwaters By John H. Carr

Waves What do you know?. Types of waves Mechanical – need a medium or material to travel through ex. Water, slinky Mechanical – need a medium or material

WAVES. Waves can be… Water waves Sound waves Light waves Earthquake waves Waves in a slinky Stadium waves

Waves in Water Waves and Sound - UNM - New Mexico's Flagship

Waves Wave - rhythmic disturbance that carries energy through matter or space. ex: water, sound, rope, springs, electromagnetic wave pulse - single disturbance,

Water Waves June 2015

Water Waves

External-Compression Supersonic Inlet Design Code...Mach Waves M L M EX Three-stage diffuser with shock waves External Supersonic Diffuser Cowl Lip Shock Waves Focal Point M L M EX

Waves What do you know?. Types of waves Mechanical need a medium or material to travel through ex. Water, slinky Mechanical need a medium or material

Waves & Vibrations Physical Science. Waves are common! Examples of waves: –Sound waves, visible light waves, radio waves, microwaves, water waves, sine

8 th grade science! 1. ◦Sound waves, ◦visible light waves, ◦radio waves, ◦microwaves, ◦water waves, ◦sine waves, ◦Coffee waves, ◦Muddy waves ◦telephone

Wave Energy. Waves have different energy Waves with lots of energy look and feel different than waves that have little energy. Ex) breeze making waves

Waves and Water Dynamics

1 Waves and Vibrations Physics: Mr. Maloney. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves,

Water Waves - Faculteit Wiskunde en Informatica · PDF fileOutline Introduction Equations for water waves Linear wave theory Classiﬁcation of water waves Behavior near the front

Waves and Water Dynamics - Hunter Collegefbuon/GEOL_180/GEOL180_S2018_Ch8.pdf · Waves and Water Dynamics Chapter 8 Lecture • Most waves are wind-driven. • Most waves are generated

Refraction of water waves

A wide variety of waves A wide variety of waves Waves on a string Acoustic waves Electromagnetic waves Water waves Dispersive and non-dispersive waves

Waves. Waves are everywhere. Sound waves, light waves, water waves, stadium waves, earthquake waves, waves on a string, and slinky waves and are just

1 Waves and Vibrations. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone

Waves and Vibrations 1. Waves are everywhere in nature – Sound waves, – visible light waves, – radio waves, – microwaves, – water waves, – sine waves,

Waves n Characteristics of All Wind-generated Waves n Deep Water Waves n Shallow Water Waves n Other Water Waves

Ocean Water Waves I

Waves Chapter 25. Waves Waves are everywhere. Sound waves, light waves, water waves, stadium waves, earthquake waves, waves on a string, and slinky waves

Waves. Important Pts. To Remember The transfer of ENERGY from wind to water makes waves. The waves move, NOT the water

2 Waves are everywhere in nature –Sound waves, –visible light waves, –radio waves, –microwaves, –water waves, –sine waves, –telephone chord waves, –stadium

Report - Water Waves

Waves Wave Spectrum Surface waves deep-water waves shallow-water waves Wave Development Wave Equations Global Wave Heights S

Waves and Sound - schoolwires.henry.k12.ga.us · Classes of waves Mechanical Waves Require a medium Ex: Sound, seismic, water Usually travel fastest in dense media DO NOT travel in

Waves are closely related to oscillations We’ll mainly deal with sinusoidal waves. - Water waves: Water molecules oscillate in a circle - Sound waves:

Waves All waves, whether they are water waves or electromagnetic waves, can be described in terms of…

1© Manhattan Press (H.K.) Ltd. 9.7Diffraction Water waves Water waves Light waves Light waves Fraunhofer diffraction Fraunhofer diffraction