Bodies that are able to attract or repel things in this way are said to be 'electrified', or to be 'charged with electricity'. When two different substances are rubbed together, an electrical charge is produced because one of them will give electrons to the other. The reason is that the atoms in the two substances have unequal power to attract electrons. So the one that is more able to attract electrons will take electrons from the one that has a lower attractive force. If glass is rubbed against something else, it may either give or take electrons. What happens depends on what the other thing is.
Things that have taken electrons are called "negatively charged", and things that have given up electrons are called "positively charged". There is no special reason for these names. It is just an arbitrary (random choice) convention (agreement).
Besides being electrified by friction, bodies may be electrified in many other ways.
Argyroxiphium
Argyroxiphium is a small genus of plants in the sunflower family, Asteraceae. Its members are known by the common names of silversword or greensword due to their long, narrow leaves and the silvery hairs on some species.
The Silversword plant grows only at high elevations on the Island of Maui in Hawaii.
The silversword is a noticeable, round-shaped rosette plant with rigid (swordlike), succulent leaves densely covered by silver hairs. When a plant flowers at the end of its life, it produces a spectacular flowering stalk 0.5-2.0 m (1.6-6.4 ft) tall, typically with hundreds of maroon sunflowerlike flower heads. This plant receives more attention from visitors to Haleakala National Park than any other plant or animal because of its striking appearance and restricted distribution.
The strikingly beautiful Haleakala silversword has always aroused the curiosity of human visitors to Haleakala Volcano. In pre-park days, plants were often removed by travelers to Haleakala Volcano as proof that the party had reached the summit, a practice that eventually seriously affected the silversword population. Browsing by feral goats and domestic cattle was also a significant factor in the silversword decline, but it was not a species preferred by these animals. By the 1920s, silversword numbers were so depleted that the Maui Chamber of Commerce sent a petition to Washington, DC, requesting that a serious effort be made to save the species (Loope and Crivellone 1986).
Mr. Pacman
Mr. Pacman is an American pop music band from Colorado. They use sounds from old video games to create their music. Mr. Pacman has recorded 2 CDs & made 4 music videos.
Music video
A music video or music clip is a short movie that represents a song on a television screen. Most music videos feature the artist who recorded the song singing or lip-syncing it on screen. TV network channels that are famous for playing music videos are MTV, VH1, BET, and CMT.
In most countries in East Asia, music videos are called PVs. PV stands for "Promotional Video."
Hip hop
Hip hop is a type of culture/art style that started in the 1970s in the Bronx. It began in Jamaican American, African American, and Puerto Rican/Hispanic and Latino American urban areas in some of the larger cities of the United States. Hip hop uses rapping, where the rapper or group chants or says words with a rhythm that rhymes. The lyrics of hip hop songs are often about the life of urban people in the big cities. Hip hop music also uses musical styles from pop music such as disco and reggae. Rap and hip hop music have become successful music genres.
Hip hop as a culture involves the music as well as a style of dressing called "urban" clothes (baggy pants, Timberland leather work boots, and oversize shirts); a dancing style called breakdancing or "B-boying"; and graffiti, a street art in which people paint pictures or words on walls. In the 2000s, hip hop music and hip hop culture are very popular in the United States and Canada. Hip hop musicians usually use nicknames. Many of the popular hip hop musicians from the 2000s use nicknames, such as Snoop Dogg, Jay-Z, Eminem, Lil' Wayne, and 50 Cent. Cities that produce the most hip hop are New York City, Chicago, Atlanta, Miami, New Orleans, Philadelphia, Detroit, Los Angeles, Houston and Memphis. Hip hop is sometimes fused with other genres such as country music and rock music.
Rapping is a form of singing. It is a mix between singing and talking. The words are spoken with rhythm and in the text there are rhymes. The urban youth made rhyming games based on rap. The beat in the background is a simple loop that is sometimes made by the rapper themself or sometimes copied from a sample CD. The simple loop carries out through the entire song usually, except for the chorus. It developed in the ethnic minority urban (city) areas, as an American form of Jamaican "toasting" (chanting and rhyming with a microphone).
Run DMC and The Sugarhill Gang were early popular hip hop groups in the 1980s. When rappers began to use violent language and gestures, the music was then liked by gangsters. This kind of music was called "gangsta rap". Gangsta rap often has lyrics which are about guns, drug dealing and life as a thug on the street. This genre also began in the 1980s and is still produced.
Some well known early rappers include: Tupac Shakur, Snoop Dogg, The Notorious B.I.G., Eminem, and Sean "P-Diddy" Combs. During the 1990s there was a rivalry between the two big record labels "Death Row Records" and "Bad Boy Records". The rappers Tupac Shakur and Notorious B.I.G. were murdered. Later, the two record labels stopped the rivalry. Because most of the rappers who rapped for "Death Row Records" were from the West Coast of the US and most of the rappers who rapped for "Bad Boy Records" were from the East Coast, this rivalry was called "the West Coast – East Coast beef".
The fastest rapper according to Guinness World Records is Twista. In 1992, he rapped 11 syllables in one second. In 2013, the song Rap God by Eminem took the record for most words in a song; 1,560 in a little over 6 minutes, which is about 4 words per second.
Color blindness
People with color blindness cannot tell the difference between certain colors. They may not see colors at all.
Most color blindness is heritable, usually as simple Mendelian inheritance. Sometimes, it is the result of damage to the eyes, nerves, or the brain. It can be caused by coming into contact with certain chemicals.
Most color blindness is permanent. Some conditions can lead to temporary color blindness. During certain kinds of migraine, some people are unable to tell the difference between certain colors. There is no treatment cure for permanent color blindness.
Many more males are color blind than females. Between five and eight percent of males, but less than one percent of females, are color blind.
Color blindness is usually thought of as a disability. However, people who are color blind have one advantage: they are sometimes better at seeing through some types of camouflage.
In 1798, English chemist John Dalton published the first scientific article about color blindness. That was after he found out that he was color blind. The article was called "Extraordinary facts relating to the vision of colours". Because of this, the condition is sometimes called "daltonism". As of 2009, the word "daltonism" is used only for the type of color blindness called deuteranopia.
There are three steps in the process of telling the difference between colors:
Inside the human eye is a part called the retina. The retina receives the images that the eye sees. It sends the images to the brain. The retina has two types of cells: Rod cells and Cone cells. They work in different types of light.