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Introduces how sound is made; how it travels; the terms "pitch," "volume," and "compression waves"; how ears detect sound; and the way vocal cords work. Views the parts of an ear and how they function to allow us to hear sounds. Uses easily replicated experiments to demonstrate sound's principles.
(Source: DCMP)
Everyday examples and laboratory experiments explain and demonstrate the concept of waves as they relate to physics. Three segments cover the characteristics of transverse and longitudinal waves and the reflection and refraction of waves. Complex physics is made clearer by the lab demonstrations.
When an earthquake hits, it sends seismic waves through the ground. Find out about seismic waves in this animation.
A wave carries energy from one point to another through a medium. Types of waves include light, sound, electromagnetic, mechanical, transverse, and longitudinal. Explores a wave's characteristics, such as amplitude, frequency, and wavelength. Also presents the four ways waves interact with mediums. Defines terminology as it is introduced. Quiz after summary.
Longitudinal waves carry energy through air, water, and solids. They compress and expand the medium in the same direction as the energy is transferred.
Students investigate the features of vibrations and waves. Examples of these phenomena help students understand how sounds are formed, how light travels, and how ocean waves move. Students also explore different types of waves such as microwaves, radio waves, and seismic waves. Concepts and terminology include vibration, energy, wave, light, and sound.
Waves are all around. They are a disturbance that travels through space and matter transferring energy from one place to another. Find out about the nature, shapes, and impacts of waves in this animation.
On March 11, 2011 a 9.0 magnitude earthquake off the coast of Japan generated a tsunami. This series of ocean waves sped towards the island nation with waves reaching 24 feet high. The result was devastation and utter destruction. Part of the "Danger Zone" series.
Harnessing energy from the waves of the world’s oceans seems like the ultimate in renewable fuel. With funding from the National Science Foundation, Electrical engineer Annette von Jouanne is leading efforts to capture wave energy, by creating simple, powerful devices that can withstand heavy winds, monster waves, and corrosive salt water. Oregon State University research now underway is based on ocean buoy generators. As ocean swells hit the buoy, electrical coils inside move through a magnetic field, inducing a voltage, and creating electricity.
What is a seismic wave? Which of the four types is most destructive? Discover the science behind earthquakes with this animated video.
It’s called a wavemaker, and its 300 feet long and 12 feet wide. With support from the National Science Foundation, this huge new tool, the largest of its type in the United States, is helping scientists perform large scale studies on the impact of both hurricane and tsunami waves.
What happens when black holes collide? What is the speed of gravity? There are so many weird questions related to gravitational waves, and host Dianna Cowern interviews Dr. Michael Landry for a better understanding of gravitational waves. Part of the "Physics Girl" series.
One of the harshest environments on earth exists at the place where the sea meets the rocky shore. Students will examine the wide variety of animal and plant life that survive these difficult conditions that are caused by pounding waves during the ebb and flow of the tides.
Describes how the sound and pictures from a live event get from the camera to the home television screen. Provides a history of television, explaining the switch from black and white to color. Notes the advantages of digital signals over analog. Considers the future of television. Looks at a new technique, digital video compression, in which television signals are received through phone lines.
A 9.0 magnitude earthquake rocks the ocean floor about eighty miles off the coast of Japan. This disturbance causes a transfer of energy from the seafloor to the ocean, which generated a series of ocean waves known as a tsunami. Within 20 minutes, the waves struck the Japanese coastline, and other nations go on high alert as the tsunami spreads throughout the Pacific Ocean. Part of the "Danger Zone" series.
Heat waves, cold waves, droughts and floods are all examples of extreme climatic events. These weather extremes are due in part to climatic change and cause society to ask numerous questions related to their impact on human life. How are these extreme events produced? What effects do they have? And how will a new climatic map on a global level affect humans? Chapter 12 of Air: Climate Change Series.
Through descriptions of actual volcanic and earthquake occurrences, students will discover how these dynamic forces affect the world. This video discusses the nature and causes of earthquakes and volcanoes. Other topics covered include molten rock, magma, lava, cinder cone, shield volcano, composite volcano, caldera, Ring of Fire, seismic waves, seismograph, and Richter scale.
From a table at a bar, on a corner of the city of Buenos Aires, we discovered the nature of some of the “wave motion phenomenon” that surrounds us. Some of these were radio and TV waves or the ones from the microwave in the kitchen, solar light, X-rays and cosmic waves.
A rip current is a narrow, fast-moving channel of water that starts near the beach and extends offshore through the line of breaking waves. If a swimmer gets caught in a rip current, the best thing they can do is stay calm. The current will not pull a swimmer underwater, but it will pull them away from shore. A swimmer caught in a rip current should float and wave for help. Do not try to swim back to shore or against the rip current. Part of the "Danger Zone" series.
