Odessa

Odessa or Odesa (Ukrainian: Оде́са, [oˈdɛsɐ]; Russian: Оде́сса; IPA: [ɐˈdʲesə]) is a city in Ukraine and a major seaport and transportation hub located on the northwestern shore of the Black Sea. Odessa is also an administrative center of the Odessa Oblast and a multiethnic major cultural center. Odessa is the third biggest city in Ukraine and known in Ukraine as Black Sea Pearl or Southern Palmyra.

The predecessor of Odessa, a small Tatar settlement, was founded by Hacı I Giray, the Khan of Crimea, in 1440 and originally named after him as "Hacıbey". After a period of Lithuanian control, it passed into the domain of the Ottoman Sultan in 1529 and remained in Ottoman hands until the Ottoman Empire's defeat in the Russo-Turkish War of 1792.

In 1794, the city of Odessa was founded by a decree of the Empress Catherine the Great. From 1819 to 1858, Odessa was a free port. During the Soviet period it was the most important port of trade in the Soviet Union and a Soviet naval base. On 1 January 2000, the Quarantine Pier at Odessa Commercial Sea Port was declared a free port and free economic zone for a period of 25 years.

The Beach

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Energy

In physics, energy is a property of objects which can be transferred to other objects or converted into different forms, but cannot be created or destroyed. The "ability of a system to perform work" is a common description, but it is difficult to give one single comprehensive definition of energy because of its many forms. For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton. However, there are many other definitions of energy, depending on the context, such as thermal energy, radiant energy, electromagnetic, nuclear, etc., where definitions are derived that are the most convenient.

Common energy forms include the kinetic energy of a moving object, the potential energy stored by an object's position in a force field (gravitational, electric or magnetic), the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns, the radiant energy carried by light, and the thermal energy due to an object's temperature. All of the many forms of energy are convertible to other kinds of energy, and obey the law of conservation of energy which says that energy can be neither created nor be destroyed; however, it can change from one form to another.

Solar

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Ukraine

Ukraine (ⁱ/juːˈkreɪn/; Ukrainian: Україна, tr. Ukraina [ukrɑˈjinɑ]) is a country in Eastern Europe,bordered by Russia to the east and northeast, Belarus to the northwest, Poland and Slovakia to the west, Hungary, Romania, and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively. It is currently in dispute with Russia over the Crimean peninsula which Russia annexed in 2014 but Ukraine and most of the international community still recognise as Ukrainian. Including Crimea, Ukraine has an area of 603,628 km² (233,062 sq mi), making it the largest country entirely within Europe and the 46th largest country in the world, and a population of about 44.5 million, making it the 32nd most populous country in the world.

The territory of modern Ukraine has been inhabited since 32,000 BC. During the Middle Ages, the area was a key centre of East Slavic culture, with the powerful state of Kievan Rus' forming the basis of Ukrainian identity. Following its fragmentation in the 13th century, the territory was contested, ruled and divided by a variety of powers, including Lithuania, Poland, the Ottoman Empire, Austria-Hungary, and Russia. A Cossack republic emerged and prospered during the 17th and 18th centuries, but its territory was eventually split between Poland and the Russian Empire, and later submerged fully into Russia. Two brief periods of independence occurred during the 20th century, once near the end of World War I and another during World War II, but both occasions would ultimately see Ukraine's territories conquered and consolidated into a Soviet republic, a situation that persisted until 1991, when Ukraine gained its independence from the Soviet Union in the aftermath of its dissolution at the end of the Cold War.