http://upload.wikimedia.org/wikipedia/commons/archive/4/47/20060521051627!2004_Indonesia_Tsunami_Complete.gif
http://my-ecoach.com/online/webresourcelist.php?rlid=3608
What happens to a tsunami as it approaches land?
As a tsunami leaves the deep water of the open ocean and travels into the shallower water near the coast, it transforms. If you read the “How do tsunamis differ from other water waves?” section, you discovered that a tsunami travels at a speed that is related to the water depth – hence, as the water depth decreases, the tsunami slows. The tsunami’s energy flux, which is dependent on both its wave speed and wave height, remains nearly constant. Consequently, as the tsunami’s speed diminishes as it travels into shallower water, its height grows. Because of this shoaling effect, a tsunami, imperceptible at sea, may grow to be several meters or more in height near the coast. When it finally reaches the coast, a tsunami may appear as a rapidly rising or falling tide, a series of breaking waves, or even a bore.
What happens when a tsunami encounters land?
As a tsunami approaches shore, we’ve learned in the “What happens to a tsunami as it approaches land?” section that it begins to slow and grow in height. Just like other water waves, tsunamis begin to lose energy as they rush onshore – part of the wave energy is reflected offshore, while the shoreward-propagating wave energy is dissipated through bottom friction and turbulence. Despite these losses, tsunamis still reach the coast with tremendous amounts of energy. Tsunamis have great erosional potential, stripping beaches of sand that may have taken years to accumulate and undermining trees and other coastal vegetation. Capable of inundating, or flooding, hundreds of meters inland past the typical high-water level, the fast-moving water associated with the inundating tsunami can crush homes and other coastal structures. Tsunamis may reach a maximum vertical height onshore above sea level, often called a runup height, of 10, 20, and even 30 meters.
This numerical simulation (2.6 MB), produced by Professor Nobuo Shuto of the Disaster Control Research Center, Tohoku University, Japan, shows the 1923 Kanto tsunami attacking a Japanese village. A longer version (6.2 MB) of the this animation is also available. Note that the structures in this model are rigid – in a real-life tsunami, coastal structures often are destroyed. (The QuickTime movie presented here was digitized from a video tape produced from the original computer-generated animation.)
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Question 5
When the man was burning to death, many people just walked right by him and ignored him. This is the case in everyday life. Many different people have ideas and no one to listen to them. There is an importance of having an audience when presenting your ideas because you feel that someone is listening, rather than just being ignored. Plus having an idea being heard could be the start of something that turns into something more. The one idea could be transformed into something that changes the world for the better; but if there was no audience to hear the one idea that could of turned into something great, then the person would just feel like it’s not important because he’s being ignored. Having an audience is what every person wants. They want to be heard and want people to respond to their ideas. Even the quietest person wants to be heard some of the time. Being ignored all the time would just result as the person becoming isolated.
Question 14
In this scene Louis Mackey says that there is a bigger gap between the average person and Plato, then the average person and a chimpanzee. He blames this on laziness
Filed under Uncategorized | Comment (0)http://www.youtube.com/watch?v=ThUaBAGJpQs
http://www.youtube.com/watch?v=EI_HWv0qWrw
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