Most of the rings are only a few kilometres wide and are very dark. Most rings are made of rocks 0.2–20 meters wide. But some rings are made of very small dust particles. The closest ring is 38,000 km away from the center of Uranus and the furthest ring is 98,000 km away.
Scientists think that the rings are at not more than 600 million years old. The ring system was created when several moons crashed together. After crashing, the moons broke up into many pieces and made rings.People may discover more rings.
R rating
An R rating is a rating given to multimedia. It usually means that people under the age of 17 require an accompanying parent or adult guardian in order to watch it. The rating means different things in different countries:
Excision (musician)
Excision (real name: Jeff Abel) (born 1986 in Kelowna, British Columbia, Canada) is a dubstep DJ and music boss. His signature sound takes influence from the morphing basslines of the drum and bass genre, the aggressive energy of heavy metal, and the laid back vibes of hip hop. Excision is also cited as being one of the first dubstep producers and DJs in North America, he has also played a significant role in the genre's growth in popularity. His first release was in 2007. Excision was asked by Pendulum to remix their 2009 single “Showdown.” His musical recordings from the Shambhala Music Festival in 2008, 2009, 2010 and 2011 have also received over a million downloads which are available for free. He is known to work frequently with fellow Canadian producers Datsik and Downlink. he is also bad ass
Populus
Populus is a genus of trees common in the northern hemisphere. They are commonly called poplars. The genus has 25–35 species in three sub-groups, commonly called poplars, aspens, and cottonwoods.
In the September 2006 issue of "Science", it was announced that the Western Balsam Poplar ("P. trichocarpa") was the first tree to have its full DNA code sequenced.
The flowers are mostly dioecious (rarely monoecious) and appear in early spring before the leaves. They are borne in long, drooping catkins. The male flowers have a group of 4–60 stamens on a disk. The female flower is a single-celled ovary in a cup-shaped disk.
Pollination is by wind. The fruit is a two to four-valved capsule, green to reddish-brown, mature in mid summer. It contains tiny light brown seeds surrounded by tufts of long, soft, white hairs which help wind dispersal.
Poplars of the cottonwood section are often wetlands or riparian trees. The aspens are among the most important boreal broadleaf trees.
Poplars and aspens are important food plants for the larvae of a large number of Lepidoptera species. "Pleurotus populinus", the aspen oyster mushroom, is found exclusively on dead wood of "Populus" trees in North America.
Equilibrium constant
Equilibrium constant is a mathematical quantity which expresses the relationship between products and reactants of a reaction at equilibrium with respect to a specific unit. In other words, equilibrium constant is the reaction quotient of a chemical reaction at chemical equilibrium. The equilibrium constant can help us to understand whether the reaction tends to have a higher concentration of products or reactants at equilibrium. We can also use to Equilibrium constant determine if the reaction is already at equilibrium.
There are several different types of equilibrium constants that provide relationships between the products and the reactants of a chemical reaction at chemical equilibrium in terms of different units. Dissociation constants can be used as an example.
For a general chemical equilibrium
the equilibrium constant can be defined by
where {A} is the activity of the chemical species A, etc. (activity is a dimensionless quantity). It is conventional to put the activities of the products in the numerator and those of the reactants in the denominator.
For equilibria in solution, activity is the product of concentration and activity coefficient. Most chemists determine equilibrium constants in a solution with a high ionic strength. In high strength solutions, the quotient of activity coefficients changes very little. So, the equilibrium constant is defined as a concentration quotient:
Or,
Here, formula_5 is the partial pressure of formula_6.
If,
Then,
Here, formula_9 is the equilibrium constant in terms of partial pressure.
In this same process,
For the reaction above,
So, the relation between formula_12 and formula_9 is,
Here, formula_15 the number of moles of gas on the product side minus the number of moles of gas on the reactant side in the balanced reaction
Edward Durell Stone
Edward Durell Stone (March 9, 1902 - August 6, 1978) was an American architect. He is most known for designing buildings with modernist style between 1950-1960s.
Bashar al-Assad
Bashar al-Assad (born 11 September 1965) is the president of Syria and the head of the Ba'ath Party in Syria. Assad has held these positions since the death of his father Hafez al-Assad (1930-2000), who had ruled Syria since 1971.
Bashar al-Assad was elected in 2000, and re-elected in 2007. He was unopposed each time because no-one else was allowed to stand against him.
Assad was born on 11 September 1965 in Damascus, Syria to Hafez al-Assad and Anisa Makhlouf. He had two brothers, Bassel al-Assad and Shabbih Maher al-Assad, and one sister, Bushra al-Assad. Bashar was quiet and reserved and was not interested in politics or the military.
Assad studied medicine at the University of Damascus and graduated in 1988. He then studied ophthalmology at a military hospital, and in 1992 studied at the Western Eye Hospital in London.
His father wanted Assad's elder brother Bassel to succeed him as leader of Syria. Bassel died in a car accident in 1994, and Assad returned home to Syria.
He went to a military academy at Homs, and became a colonel after only five years. He worked as an adviser to his father.
When Bashar's father died, the government changed the constitution. Under Syrian law the president had to be at least 40 years old. With the law changed, Assad was able to be elected President of Syria in June 2000. He was also made commander-in-chief of the armed forces, and leader of the Ba'ath Party which has ruled Syria since 1961.
Large protests began in January 2011. The protesters wanted political reforms, an end to the state of emergency (which had been in place since 1963), and the return of civil rights. The protests in March were the largest to take place, and the government used violence against the protestors.
The United States placed sanctions against the Assad government in April 2011. Canada and the European Union also placed sanctions against the government in May 2011.
In June 2011, Assad promised reform, a new parliarmentary election, and more freedoms. He also urged refugees to return to Syria.
In January 2012, Reuters claimed that over 5,000 civilians and protesters (including militants) had been killed by the Syrian army, security agents and militia, while 1,100 people had been killed by terrorists.
In January 2012, Assad gave a speech in which he claimed that the uprising was being engineered by foreign countries. He said that a new referendum could be held in March.
The referendum was held in February 2012. The referendum would change the term limits of future Syrian presidents. It passed with 90% support. The U.S. and Turkey did not accept the results. The European Union pushed new sanctions on the government.
In June 2012, the ICRC announced that Syria was in a civil war. The national death toll on both sides reached 20,000.
In 2014 and 2015, he began to lose some support from the Alawite community. This was because an unequal number of soldiers killed in the conflict were Alawites.