This document discusses different types of waves including mechanical, electromagnetic, and matter waves. It focuses on sound waves, which are longitudinal waves that transfer energy through air in the form of alternating pressure variations. The document explains how sound is produced by oscillating objects and detected by the ear. It also covers the Doppler effect, where the observed frequency of sound changes depending on whether the source is moving toward or away from the observer. The last part discusses shock waves that form when objects exceed the speed of sound.
Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.
A learning object on factors affecting the speed of travelling waves. The example given in this slideshow is how dolphins use echolocation to detect objects in the ocean.
Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.
A learning object on factors affecting the speed of travelling waves. The example given in this slideshow is how dolphins use echolocation to detect objects in the ocean.
Mczee explains Conservation of Linear Momentumyoumarks
Our Mczee again stuck in a climbing problem. This time with a balloon. But he learns a lot of physics with this experience. And guess who helps in understanding the stuff?
A checklist, from simple to more complex, of facts, concepts, skills, and questions to ask yourself when learning a new reaction in organic chemistry. From www.masterorganicchemistry.com
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P1.5 Presentation.
Useful for revision for exams as it contains accurate information.
It includes:
- What are Waves
- Waves Definitions
- Energy Transfer
- Wave Speed
- Frequency & Time Period
- Light & Sound
- Reflection
- Refraction
- Diffraction
- Measuring Waves
- Oscilloscopes
- Ray Diagrams
- Using Light
- Red Shift
- The Big Bang Theory
This final presentation completes the whole of Physics (P1). This'll hopefully become part of a bigger collection of other science topics, soon to be uploaded.
Thank You. To all of you out there who may find my presentation helpful in any way, shape or form.I pleased to now be able to say the P1 Collection is now complete. Soon I'll be uploading other presentation on Physics, such as; P2 & P3 Hope you find these presentations useful and helpful for exams or just general revision. More presentation coming soon on this channel, JaskiratK.
See You Soon,
Jaskirat
Created By: JaskiratK
Uploaded By: JaskiratK
Information By: BBC Bitesize
Pictures/Images/Diagram: Google, BBC Bitesize
Slideshare: http://www.slideshare.net/JaskiratK
Prezi: https://prezi.com/user/mrnfvgaamzxe/
Describe and explain how sound travels in each Solids Liquids G.pdflohithkart
Describe and explain how sound travels in each: Solids: Liquids: Gas: Outer Space: List an
example for each kind of energy transfer: Thermal to electrical: Electrical to mechanical:
Mechanical to sound: Electrical to light: Define and give an example of each term as it relates
to light: Reflection: Refraction: Absorption: Lens: Define each term as it relates to electricity:
Open circuit: Closed Circuit:
Solution
1) Sound travels in different forms in different medium
Solids:
In solids, sound waves travel as both longitudinal as well as transverse waves. Longitudinal
waves are alternate regions of compressions and rarefractions caused by pressure deviations from
the mean pressure. On the other hand, transverse waves are caused by alternate regions of shear
stress developed perpendicular to the direction of propogation of the sound wave.
Liquids:
In liquids, sound travels through alterante regions of high pressure(compression) and low
pressure(rarefraction). Such type of waves are known as longitudinal waves. The source causing
the sound vibrates, thus compressing and expanding the air in the region near the source. This
gets propogated in space through longitudinal waves.
Gasses:
Like in liquids, sound travels through through longitudinal waves in gasses too.. The source
causing the sound vibrates, thus compressing and expanding the air in the region near the source.
This gets propogated in space through longitudinal waves.
Outer Space:
Sound requires some medium for propogation. Since outer space is devoid of any matter, sound
does not travel in outer space.
2)
Thermal to Electrical: Thermoelectric generators, Thermocouples etc
Electrical to Mechanical: AC Generator
Mechanical to sound: Bells, Percussion Instruments
Electrical to light: Torch light, Light Bulbs
3)
Reflection: The change in direction of light wave on hitting a surface is known as reflection. Eg:
Mirror
Refraction: Bending of light wave as it travels from one medium to another is known as
refration. refraction mainly happens due to difference in the refractive index between to the two
mediums. Eg: Contact lens, lens in microscopes
Absorption: The phenomenon by which light wave could be absorbed by a material when
incident on it is known as absorption. Eg: Absorption of light by chlorophyl for photosynthesis
Lens: lens is an optical device that bends light in a required fassion through refraction. depending
on the requirement and the shape of the lens, it can be used to focus the light beam or disperse.
Eg: Contact lens
4)
Open circuit: An electrical circuit without a complete path between the terminals of the power
source is known as open circuit
Closed circuit: An electrical circuit with atleast one complete path between the terminals of the
power source is known as open circuit.
This presentation by Morris Kleiner (University of Minnesota), was made during the discussion “Competition and Regulation in Professions and Occupations” held at the Working Party No. 2 on Competition and Regulation on 10 June 2024. More papers and presentations on the topic can be found out at oe.cd/crps.
This presentation was uploaded with the author’s consent.
This presentation, created by Syed Faiz ul Hassan, explores the profound influence of media on public perception and behavior. It delves into the evolution of media from oral traditions to modern digital and social media platforms. Key topics include the role of media in information propagation, socialization, crisis awareness, globalization, and education. The presentation also examines media influence through agenda setting, propaganda, and manipulative techniques used by advertisers and marketers. Furthermore, it highlights the impact of surveillance enabled by media technologies on personal behavior and preferences. Through this comprehensive overview, the presentation aims to shed light on how media shapes collective consciousness and public opinion.
Have you ever wondered how search works while visiting an e-commerce site, internal website, or searching through other types of online resources? Look no further than this informative session on the ways that taxonomies help end-users navigate the internet! Hear from taxonomists and other information professionals who have first-hand experience creating and working with taxonomies that aid in navigation, search, and discovery across a range of disciplines.
Sharpen existing tools or get a new toolbox? Contemporary cluster initiatives...Orkestra
UIIN Conference, Madrid, 27-29 May 2024
James Wilson, Orkestra and Deusto Business School
Emily Wise, Lund University
Madeline Smith, The Glasgow School of Art
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Introducing Acorn Recovery as a Service, a simple, fast, and secure managed disaster recovery (DRaaS) by IP ServerOne. A DR solution that helps restore your IT infra within minutes.
0x01 - Newton's Third Law: Static vs. Dynamic AbusersOWASP Beja
f you offer a service on the web, odds are that someone will abuse it. Be it an API, a SaaS, a PaaS, or even a static website, someone somewhere will try to figure out a way to use it to their own needs. In this talk we'll compare measures that are effective against static attackers and how to battle a dynamic attacker who adapts to your counter-measures.
About the Speaker
===============
Diogo Sousa, Engineering Manager @ Canonical
An opinionated individual with an interest in cryptography and its intersection with secure software development.
0x01 - Newton's Third Law: Static vs. Dynamic Abusers
SOUND WAVES
1. Physics 11
Traveling Waves
and Sound
Types of Waves
Sound
The Doppler Effect
Types of Waves
Mechanical Waves ⇒ waves that involve the
motion of a substance (the medium) through
which the wave moves
Electromagnetic Waves ⇒ a transverse wave
consisting of oscillating electric and magnetic
fields (no medium is required)
Matter Waves ⇒ at the atomic level, particles
such as electrons and atoms must be treated as
waves called matter waves
An Electromagnetic Wave
⇒ An electromagnetic wave is a transverse
wave consisting of oscillating electric and
magnetic fields.
disturbance
direction of travel
Transverse Wave
2. Longitudinal Wave
direction of travel
disturbance
Sound is a longitudinal wave
A wave in which the disturbance is parallel to the direction of
travel of the wave.
direction of travel
disturbance
⇒ In sound waves, air molecules are disturbed in the same
direction as the wave.
⇒ However, an individual air molecule does not travel
with the wave. It only oscillates back and forth.
Sound
⇒ All sound is produced by an
object that oscillates back and
forth.
Sound
3. ⇒ A speaker produces sound by a diaphragm which
oscillates back and forth.
⇒ The diaphragm produces successive regions of
increased pressure (condensations) and decreased
pressure (rarefactions).
Sound
Regions of increased pressure are
called condensations.
Regions of decreased pressure are
called rarefactions.
Sound
Sound
condensation
⇒ Your eardrum then detects the differences
in air pressure.
Sound
4. Sound An Electromagnetic Wave
⇒ An electromagnetic wave is a transverse
wave consisting of oscillating electric and
magnetic fields.
The Visible Spectrum
⇒ Imagine if you can the world view of little
creatures who could see only a very tiny portion
of the visible spectrum, creatures who are color
blind to all other parts. Their world view would
be very limited.
⇒ Guess what? We are like those little creatures,
in that the spectrum of colors we can see are a tiny
portion of the electromagnetic spectrum!
The Electromagnetic Spectrum
⇒ The electromagnetic spectrum consists of
electromagnetic waves of all frequencies.
5. The Electromagnetic Spectrum
⇒ Visible light makes up a very small portion (less
than one millionth of 1%) of the measured
electromagnetic spectrum.
A stationary sound source
What happens if the sound source is moving?
If the sound source is moving toward an observer,
the observer will hear a sound of higher frequency.
If the sound source is moving away from an observer,
the observer will hear a sound of lower frequency.
I hear a
lower frequency
I hear a
higher frequency
⇒ The frequency of sound (pitch) increases when
a source moves towards you.
⇒ The frequency of sound (pitch) decreases when
a source moves away from you.
The Doppler Effect
6. ⇒When an observer is moving towards a stationary source, the
frequency is greater (and the wavelength is smaller).
⇒When an observer is moving away from a stationary source, the
frequency is smaller (and the wavelength is bigger).
The Doppler Effect
The Doppler Effect:
Formal definition: the change in frequency or
pitch of the sound detected by an observer
because the sound source and the observer have
different velocities with respect to the medium of
sound propagation.
What it means: if either you or the source of
sound is moving, you will hear a sound of a
different frequency than is being emitted.
An object traveling at the speed of sound
A shock wave is formed!
bow wave ⇒ V-shaped wave produced by an object
moving on a liquid surface faster than the wave speed.
Bow Waves and Shock Waves
⇒ A similar thing happens when a plane is traveling
faster than the speed of sound. A sonic boom is heard
when the shock wave reaches listeners on the ground.
7. Breaking the Sound Barrier
sin θ =
s
v
v
v = speed of sound
vs = speed of object
We could figure out the speed of the jet by measuring
the angle of the Mach cone!