Surface Waves: Understanding its movements I. Introduction We treat here an important wave phenomenon‚ the surface wave. It occurs in many physical systems both mechanical and electromagnetic. Mechanical surface waves can exist at the interface between two media with different densities such as the oceans and air. Ordinary sea waves and tsunamis are surface waves. Seismic events can produce both longitudinal and shear waves at the earth’s surface‚ resulting in earthquakes. Electromagnetic surface
Premium Light Electromagnetic radiation Radio
The third-wave feminists are critical to the first and second waves because it ties all of the women’s movements previous accomplishments to all women‚ regardless of race‚ color‚ sexual orientation‚ and class. Without the third-wave feminists only white women would have the luxury of being able to vote‚ being provided equal employment opportunity‚ being heard when faced with sexual harassment and marital rape‚ and being able to broadcast the discrimination of gender. America wouldn’t be the country
Premium Feminism Gender Women's rights
English Next Why global English may mean the end of ‘English as a Foreign Language’ David Graddol The moral rights of the author have been asserted. The opinions expressed in this book are not necessarily those of the British Council. Designed and produced by The English Company (UK) Ltd www.english.co.uk Cover design by Intro (Last minor revision Jan 2007) © British Council 2006 The United Kingdom’s international organisation for educational opportunities and cultural relations. We
Free English language
WAVES OF MIGRATION 1. The Negritos * first people to come to the Philippines * also called Atis or Aetas * They came across land bridges from mainland Asia about 25‚000 years ago. * Philippines then‚ was connected to Asia by land bridges which later sank below the sea * very small people‚ less than 5 feet tall * Were called "Negritos" because they had black skin‚ short kinky hair‚ thick lips‚ and black noses. * they wore little
Premium Philippines Visayas
Before beginning our research on radio waves‚ to us‚ radio waves were just waves going through the atmosphere‚ carrying sound from one place to another. Those were our ignorant days! We did not realize the complicated terms and theories involved. In the following report you will see how we advanced in our knowledge of radio waves‚ and we hope it will do the same for you. Radio waves are a combination of two kinds of electric vibrations. Audio frequency waves‚ which represent voice and other
Premium Radio Electromagnetic radiation Broadcasting
Electromagnetic Waves It was once the great Scottish physicist James Clerk Maxwell (1831-1879) who had presented that electric and magnetic fields unstable together can form a spreading wave‚ appropriately called an electromagnetic wave. The properties of an electromagnetic wave are as follows: 1. They can travel through a vacuum at the same high speed‚ which is much faster than other types of waves that travel through a material. 2. They show the normal wave properties of reflection‚ refraction
Free Electromagnetic radiation Light Electromagnetic spectrum
Introduction Mistakenly called "tidal wave" the word tsunami is a Japanese word meaning‚ "harbor wave". A tsunami is a series of traveling ocean waves of extremely long length generated by disturbances associated primarily with earthquakes occurring below or near the ocean floor. Tsunamis are primarily the result of a vertical displacement of water and rank high on the scale of natural disasters. Since 1850‚ tsunamis have been responsible for the loss of over 440‚000 lives and billions of dollars
Premium Tsunami 2004 Indian Ocean earthquake
inexpensive‚andsafesoisoftenthefirstchoiceof a medical imaging method where feasible Sound waves • Sound wave propagate by longitudinal motion (compression/expansion)‚ but not transverse motion (side-to-side) • Can be modeled as weights connected by springs 1Ultrasonic Waves and properties • Mechanical waves are longitudinal compression waves • “Ultrasound” refers to frequencies greater than 20kHz‚ the limit of human
Premium Acoustics Ultrasound Sound
------------------------------------------------- Experiment NO. 315 ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- WAVE PROPAGATION ------------------------------------------------- ------------------------------------------------- EE3071 Laboratory 3 Location: S1-B4a-03 AY 2011/2012 Name: EMIR NUROV Matriculation number: U0920108K Group:
Premium Electromagnetic radiation Radio Antenna
INFRARED WAVES * Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light How They’re Made: Infra red waves are just below visible red light in the electromagnetic spectrum ("Infra" means "below"). You probably think of Infra-red waves as heat‚ because they’re given off by hot objects‚ and you can feel them as warmth on your skin. Infra Red waves are also given off by stars‚ lamps‚ flames and anything else that’s warm - including you. The detector
Premium Infrared