Showing posts with label physical phenomena. Show all posts
Showing posts with label physical phenomena. Show all posts

Saturday, January 29, 2011

SOLID LIQUID _physical phenomena



 TSUNAMI


a solid and destroyer wall of liquid water


19th century tsunami painting by japanese artist Hokusai

26 December 2004 Sumatra's West Coast 
A tsunami (pronounced tsoo-NAH-mee) is a series of waves, made in an ocean or other body of water by an earthquake, landslide, volcanic eruption, or meteorite impact. Tsunamis can cause huge destruction when they hit coastlines. Some people call tsunamis “tidal waves”, but these large waves really have little to do with tides, so the term “tidal wave” does not really suit them.
Tsunami waves are different from the waves you can usually find rolling into the coast of a lake or ocean. Those waves are made by wind offshore and are quite small compared with tsunami waves. A tsunami wave in the open ocean can be more than 100 km across. That’s roughly the length of 1000 American football fields! Tsunami waves are huge and can travel very quickly, at about 700 km/hr, but they are only about one meter high in the open ocean.

Wednesday, January 26, 2011

SOLID LIQUID _chemistry

MERCURY: 


a material on the edge between being solid and liquid

MERCURY


 Mercury, also known as quicksilver or hydrargyrum is a chemical element with the symbol Hg (Latinized Greekhydrargyrum, from "hydr-" meaning watery or runny and "argyros" meaning silver) and atomic number 80. Mercury is the only metal that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions isbromine. With a freezing point of −38.83 °C and boiling point of 356.73 °C, mercury has one of the broadest ranges of its liquid state of any metal. A heavy, silvery d-block metal, mercury is also one of the five metallic chemical elements that are liquid at or near room temperature and pressure, the others beingcaesiumfranciumgallium, and rubidium.

SOLID LIQUID _geography

DEAD SEA
a sea stuffed with salt




The Dead Sea ,also called the Salt Sea, is a salt lakebordering Jordan to the east and Israel and the West Bank to the west. Its surface and shores are 423 metres (1,388 ft) below sea level, the lowest elevation on the Earth's surface on dry land. The Dead Sea is 377 m (1,237 ft) deep, the deepest hypersaline lake in the world. It is also one of the world's saltiest bodies of water, with 33.7% salinitys. It is 8.6 times more salty than the ocean. This salinity makes for a harsh environment where animals cannot flourish, hence its name. The Dead Sea is 67 kilometres (42 mi) long and 18 kilometres (11 mi) wide at its widest point. It lies in the Jordan Rift Valley, and its maintributary is the Jordan River.
The Dead Sea has attracted visitors from around the Mediterranean basin for thousands of years. Biblically, it was a place of refuge for King David. It was one of the world's first health resorts (for Herod the Great), and it has been the supplier of a wide variety of products, from balms for Egyptian mummification to potash forfertilizers. People also use the salt and the minerals from the Dead Sea to create cosmetics and herbal sachets. In 2009, 1.2 million foreign tourists visited on the Israeli side.
The sea has a density of 1.24 kg/L, making swimming difficult but providing a relaxing floating experience.