Clay Bricks (0)

Sarnased õppematerjalid

13

pptx

Dioxins and furans in the atmosphere

D i ox i n s a n d f u r a n s i n t h e atmosphere. Their impact on humans and nature. Emission sources  What are dioxines and furans? The term Dioxin is commonly used to refer to a family of toxic chemicals that all share a similar chemical structure and a common mechanism of toxic action. Most dioxins and furans are not manmade or produced intentionally, but are created when other chemicals or products are made. This family includes: seven of the polychlorinated dibenzo dioxins (PCDDs), ten of the polychlorinated dibenzo furans (PCDFs) and twelve of the polychlorinated biphenyls (PCBs). · PCDD · 2,3,7,8TCDD · PCDF · PCB · PCDDs and PCDFs are not commercial chemical products but are trace level unintentional byproducts of most forms of combustion and several industrial chemical processes. Of all of the dioxins and furans, one, 2,3,7,8tetrachloropdibenzo dioxin (2,3,7,8 TCD

Inglise keel

12

docx

Wooden pallets

SLAID 1 I am going to talk about wooden pallets. After I am finished I will answer any question you might have about my presentation. SLAID 2 Lets start with history. Wooden pallets date back to 1000 B.C. Egiptians used sheets of wood for transport and storage. These wooden sheets are called skids or sleads. They are still in use but their shape and durability has changed a lot. It was the during the early 1920’s, shortly after the modern forklift was invented, when skids evolved into pallets, revolutionizing the way merchandise was stored and transported. The new design of pallets allowed goods to be moved, stored and stacked with extraordinary speed and versatility. During the WWII the allied countries established a standard size pallet to ease shipment and transportation. This agreement skyrocketed the production and popularity of wooden pallets during the war After the war variety of sizes and designs were produced and used. The transport and storage of different sizes pallets ma

Ehitus materjalid ja konstruktsioonid

29

rtf

PETROLEUM

Tallinn 2013 Ott Speek Subject: English Geodesy Study group: GI-21b PETROLEUM PRESENTATION Petroleum (L. petroleum, from Greek: Πέτρα (rock) + Latin: oleum (oil) is a naturally occurring flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. The name Petroleum covers both naturally occurring unprocessed crude oils and petroleum products that are made up of refined crude oil. A fossil fuel, it is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure. Petroleum is recovered mostly through oil drilling. This comes after the studies of structural geology (at the reservoir scale), sedimentary basin analysis, reservoir characterization (mainly in terms of porosity and permeable structures). It is refined and separated

Inglise keel

62

doc

Energy - põhjalik referaat energiast

SISUKORD ENERGY STORY................................................................................................................4 USES OF ENERGY............................................................................................................. 4 2.1 Uses of energy in homes...............................................................................................5 2.2 Types of energy used in homes.................................................................................... 6 2.3 Energy use in different types of homes........................................................................ 6 2.4 Commercial Energy Use...............................................................................................9 2.5 Industrial and Manufacturing Energy Use..................................................................11 2.6 Transportation Energy Use.........................................................................................12 RENE

Inglise keele foneetika ja fonoloogia

9

ppt

The Navajo People, Art

weaving. Navajo rugs and blankets are not only functional but they are also an important element in the culture and economy of the Navajo Nation. Traditionally Navajo rugs were used as bedding, saddle blankets, and ceremonial dress. These traditional usages can still be seen today.  POTTER Y Navajo art is known for being hand made from natural materials, this includes Navajo Pottery. The Navajo use natural clay from special locations and the colors used to stain and paint the pottery come from local plants. Even the mud ovens in which the pottery is cooked is made of materials from the surrounding area.  BASKETR Y While the art of basketmaking may seem minor, a basket has great symbolic significance because it represents the wellbeing of an individual, particularly the mind. Apart from their ceremonial usage, baskets are also used for

Inglise keel

8

docx

Stonehenge - lühikokkuvõte inglise keeles

STONEHENGE Stonehenge is surely Britain's greatest national icon, symbolizing mystery, power and endurance. Its original purpose is unclear to us, but some have

British history (suurbritannia ajalugu)

13

doc

Aborigeenid (Inglise keeles)

Such as the sky, or water. During the Dreaming the ancestors criss-crossed Australia shaping the land into its current state as the went. The Aborigines also consider certain constellations to be ancestors . Death was always a time of sorrow and supernatural fear among traditional ATSI people(Aboriginal and Torres Strait Islander people.) . Wailing or crying was a common occurrence among the mourners who often painted their bodies with pipe clay, red ochre, or charcoal when a relative or friend died. In some districts people wore a head covering made of feathers. Others beat their bodies with sticks or clubs, or cut themselves with shells or stone knives to cause bleeding. In these instances the period of sorrow or mourning, was considered to be at an end when their wounds were healed. Relatives and close friends often sat beside a grave of a deceased person, but this was related to their superstitious beliefs.

Geograafia inglise keeles

17

docx

Railgun

Referaat Railgun Table of contents Introduction......................................................................................................................................3 1.What a railgun basically is............................................................................................................4 1.1History of railguns...................................................................................................................4 1.2Theory behind it......................................................................................................................5 1.3How a railgun works...............................................................................................................6 1.4How a railgun would work on a military ship in the future....................................................8 3. Research advances so far.............................................................................................................9

Inglise keel

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