Monday, January 31, 2011

SOLID LIQUID _presentation

SOLID & LIQUID in español


SOLID LIQUID_materials

AMBER: solid element of liquid component


Amber is fossilized tree resin, which has been appreciated for its color and natural organic beauty since Neolithictimes. Amber is used as an ingredient in perfumes, as a healing agent in folk medicine, and as jewelry. There are five classes of amber, defined on the basis of their chemical constituents. Because it originates as a soft, sticky tree resin, amber sometimes contains animal and plant material as inclusions.


Patent US 4812052

Structural components, especially components having complicated configurations, are endurance tested for their creep resistance or strength in a removable massive metal testing block which encloses the component being tested in the manner of a mold. The mold type testing block is made of a high heat resistant metal acting as a susceptor in an induction heating system in which the testing block is surrounded by an induction heating coil. In this system the component being tested can be heated to high, highly constant temperatures which provides a substantial improvement in the creep testing results and reduces the cost of testing.

 The aim of studying the creep phenomena is to determine the behaviour of the polymer. Polymers have intrinsecally a double nature, that is liquid and solid at the same time. The liquid behaviour can be measured by the amount of creep, namely the (irreversible) elongation of the sample due to the constant stress applied. The solid behaviour is represented by the elastic response, e.g. reversible elongation.

Saturday, January 29, 2011

SOLID LIQUID _presentation

SOLID & LIQUID in english


SOLID LIQUID _physical phenomena


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.



the power of water and the insignificancy of humanity

Vajont Dam

what happened?

Vajont's video by Marco Paolini

On 9 October 1963 at approximately 10:35pm, the combination of 'drawing-down the reservoir' and heavy rains triggered a landslide of about 260 million cubic meters of forest, earth, and rock, which fell into the reservoir at up to 110 km per hour (68 mph). The resulting displacement of water caused 50 million cubic meters of water to over-top the dam in a 250-meter high wave. Despite this, the dam's structure was largely undamaged — the top metre or so of masonry was washed away, but the basic structure remained intact.
The flooding in the Piave valley destroyed the villages of Longarone, Pirago, Rivalta, Villanova and Faè, killing 1,450 people and turning the land below into a flat plain of mud. Many small villages in the territory of Erto e Casso and the village of Codissago, near Castellavazzo, were largely wrecked. Estimates of the dead range from 1900 to 2500 people, and about 350 families lost all members. Most of the survivors had lost relatives and friends along with their homes and belongings.
The villages near the landslide also suffered damage from the air displacement caused by the impact.



the golden juice

the orange, fruit itself, is solid but when you squeeze it, it gets liquid like a orange juice