This document provides an overview of wave motion, including the following key points:
- There are two types of wave motion: longitudinal waves, where particle motion is parallel to the direction of energy transfer, and transverse waves, where particle motion is perpendicular. Sound waves are longitudinal while light waves are transverse.
- Key wave properties are defined, including wavelength, frequency, amplitude, and speed. The wave equation relating these properties is presented.
- Reflection and refraction of waves is demonstrated using wavefront diagrams, showing how waves change direction at boundaries between mediums. Refraction occurs when waves move from deep to shallow water, changing the wavelength.
A PowerPoint Presentation for Grade 9 teachers. This presentation is ONLY suggested guide for teachers to assist them on the discussion after the activities as suggested in the Learner's Module were performed. Please feel free to add comments and suggestions. Thanks!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
7. Transverse wave… In terms of the wavelength, what is the length of the red line on the graph? Wavelength λ – distance from one point on one wave to the same point on the next wave (for example- from crest to crest) Crest Crest Trough Trough Wavelength λ Wave spreads Wave movement Light travels as a transverse wave Wave movement is at right angles to the direction that the wave is travelling Amplitude – maximum displacement from its undisturbed position Amplitude
10. Longitudinal wave If the diagram shows the motion of the wave in 1 second then what is the frequency of the wave? Frequency – the number of waves passing a point every second (Hz) Rarefaction Compression Sound waves travel as longitudinal waves Wave movement is parallel to the direction the wave is travelling
25. The angle the wave hits the barrier at is 23 degrees. 1. What is the angle of incidence ? 2. Draw the three waves after they have hit the barrier and label the angle of reflection and include the normal line . Example 23 º Normal line Angle of incidence 67 º Angle of reflection 67 º
Mexican wave – people are the medium and the disturbance is their standing up and down Air-zooka – Make your own wave generator, plastic bottle and balloon. Feel the wave pass you by! The air particles bounce off each other and push the energy along from the balloon.
Wave motion is from left to right, particle motion is up and down
Moves up and down, while the wave passes from left to right.
Undisturbed position – equilibrium point Right angles is sometimes called perpendicular One quarter of a wavelength
Bit more difficult to notice, next slide illustrates this better! Particles move on the same ‘plane’ as the wave’s motion. A ‘plane’ is a flat or level surface, which may be imaginary
Particles move back and forth on the same plane as the movement of the wave
Frequency = 2 Hz (2 Waves per second) http://id.mind.net/~zona/mstm/physics/waves/partsOfAWave/waveParts.htm#frequency
Set up a table, two heading; longitudinal and transverse http://hyperphysics.phy-astr.gsu.edu/hbase/sound/wavplt.html#c3
http://surendranath.tripod.com/Applets/Waves/Twave01/Twave01Applet.html What happens to the speed of the wave as the frequency is altered? If the speed stays the same then what other feature of the wave changes as well as the frequency? Page 61 (handout from CGP) answer question 10, A wave example
Derivation using speed = distance / time Frequency is the number per second (inverse of time for one wave, one over time), Wavelength is the distance of one complete wave. Stick those values into speed equation and bing bang bong – wave equation!
Try question 9, 11 and 12 on page 61
One of the common uses of waves – we’re still getting to grips with the basics though that even x-ray waves would display
Waves can be represented using wave-front diagrams. These show the crests of the waves passing through the medium. The point half way between two crests can be regarded as the trough.
NB. The normal line is a reference line. It is set at a right angle (perpendicular) to the surface of the barrier. All angles are measured from this line e.g. the angle of incidence.
Do Now – Use your notes from last day to complete the question…
Analogy of car brakes… running on the beach… soldiers in line
White rocks - Portrush How does the wavelength change as the waves come closer to shore? It becomes smaller, the waves are closer together – from deep to shallow water, change in medium (actually slows down due to energy lost through friction with the seabed).
Surfing in Indonesia… check out the different waves (video) Some of the best swells out there!
Surf Science Chapter 6 – Refraction (pics of defocusing and focusing page 53) Surf-able waves require a change in depth from deep to shallow to cause the wave to grow in size and peel. A reef, sand-bar or point will usually be the reason for the waves changing and bending. The wave will allows bend towards the slower (shallower) part of the coast. Think of a car moving which then can apply its brakes to only the left hand-side, it will veer off to that side. Point Break – headland sticking out with deep water in front and shallow water on either side. As the swell comes in one end will slow down as it hits the shallow water and bend in towards the headland. The rest of the wave will ‘fan out’ (defocus) and the energy will be spread out along the wave. The wave will reduce in size and power but the wall will be longer and not diminish much as you ride along. Reef Break- waves are concentrated or focused onto a slab of rocking sticking out from a stretch of open coast. The shallow reef would have a deep channel of water beside it and then a steep beach on the coastline. The swell coming in hits the reef first and slows down with the rest of the swell travelling in the deep water focusing its energy and bending in towards the reef. This makes a bigger more powerful wave with a high peak, ‘swell magnet’.
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