On the Slashdot website, people can comment on the news. Often this leads to interesting discussions with many points of view.
Slashdot has been a website for ten years. It has lots of things to talk about. Some of the things are: computers, the Internet, video games, and politics.
Many people like Slashdot because you can share ideas. People who like computers and the Internet can read the ideas to learn.
Anyone can go to Slashdot and read it and do not need to give money. People from every country go. It has many ideas which are never the same.
Hooke's law
It is a law of mechanics and physics discovered by Robert Hooke.
This theory of elasticity says the extension of a spring is proportional to the load applied to it. Many materials obey this law as long as the load does not exceed the material's elastic limit. Materials for which Hooke's law is useful are known as linear-elastic or "Hookean" materials.
The length of a spring always changes by the same amount when it is pushed or pulled. The equation for this is:
When x = 0, the spring is at the equilibrium position.
This equation only works on a linear spring. A linear spring is a spring that is only being pushed or pulled in one direction, such as left or right or up or down.
Examples of everyday objects that have elastic potential energy are stretched or compressed elastic bands, springs, bungee cords, car shock absorbers, etc.
Elastic potential energy is the energy saved in an object that is stretched, compressed (compression is pressing objects together), twisted or bent. For example, an arrow gets the elastic potential energy from the bow. When it leaves the bow, the potential energy turns into kinetic energy.
The equation of the elastic potential energy is:
Railfan
A railfan is a person who likes railways and trains. Railfans like to take pictures of trains. They also like to watch trains. Some railfans make models of railways. These are called model railways.
Some railfans like to study the history of railways. Some railfans collect things having to do with trains. Railfans may carry a radio scanner when they are watching trains, so they can listen to the railway workers talk. Some railfans work for a railway, or have family members who worked for a railway. Most railfans like to ride trains.
There are many magazines for people who like trains. Railfans enjoy reading books and magazines about trains.
Time (magazine)
Time is an American news magazine. It was founded in 1923. It is printed every week in the United States. It is published by Time Inc. It has articles on politics and current events. It is read by more people than any other news magazine.
There is also a magazine called "Time For Kids", aimed at children. That magazine is eight pages long and contains more images and shorter articles than the regular "Time" magazine.
Cable television
Cable television is a way of letting people watch television without having to get signals from an antenna. The television signals are brought to the television through a coaxial cable or optical fiber, people usually have to pay to subscribe to get cable television. With cable television, people can watch many television channels carrying many television shows. Usually some of these are television stations and others are cable channels, made for the cable companies.
Cable TV is provided by many carriers, usually a place is served by only one or two cable companies. Some of those carriers in the United States are: AT&T U-Verse, Comcast, Time Warner Cable, Charter Communications and Verizon. Another method of subscription television is by Satellite television, especially in places where cable TV is not available.
Antenna
An antenna or aerial is a metal device made to send or receive radio waves. Many electronic devices like radio, television, radar, wireless LAN, cell phone, and GPS need antennas to do their job. Antennas work both in air and outer space.
The word 'antenna' is from Guglielmo Marconi's test with wireless equipment in 1895. For the test, He used a 2.5 meter long pole antenna with a tent pole called ' "l'antenna centrale" ' in Italian. So his antenna was simply called ' "l'antenna" '. After that, the word 'antenna' became popular among people and had the meaning it has today. The plural of antenna is either "antennas" or "antennae" (U.S. and Canada tends to use "antennas" more than other places).
Each one is made to work for a specific frequency range. The antenna's length or size usually depends on the wavelength (1/frequency) it uses.
Different kinds of antenna have different purposes. For example, the isotropic radiator is an imaginary antenna that sends signals equally in all directions. The dipole antenna is simply two wires with one end of each wire connected to the radio and the other end standing free in space. It sends or receives signals in all directions except where the wires are pointing. Some antennas are more directional. Horn is used where high gain is needed, the wavelength is short. Satellite television and radio telescopes mostly use dish antennas.
Jack London
John Griffith "Jack" London (born John Griffith Chaney, January 12, 1876 – November 22, 1916) was an American writer. He wrote many books. He lived in the U.S. state of California but also spent a lot of time in Hawaii and Alaska.
His most famous book was "The Call of the Wild". "The Call of the Wild" is about a dog named Buck who is taken to Alaska to work with a pack of dogs pulling a sled. This book took place during the Klondike Gold Rush. Many people bought "The Call of the Wild" and Jack London became a famous writer. He also wrote other books about dogs and wolves. Another one of his famous books is "White Fang".
Jack London was also a hobo at one time. He wrote a book about this called "The Road". Jack London had political beliefs. He was a socialist. One of his famous books is "The Iron Heel", which is the story of the government using force against the socialist movement.
He also spent some time at sea and making a living as an "oyster pirate". He wrote many books about sailing and boats. One of his best-known books about life at sea was "The Sea Wolf".
He married Charmian London born Kittredge (second wife). She was an athletic woman and an intellectual companion that broke the mold of Victorian womanhood—though they grew apart when she turned to socialite circles. His feminism was matched by models of sensitive "virility" and he sorted out the master-slave model of government in order to find alternatives.[3] He was on the vanguard of animal welfare and attempted a model pig farm, and experimented with early ecological agriculture, but Wolf House (his dream home) burnt to the ground in what could have been arson.[4] He died in a state of depression.
3. Cf. Saiz, Peter Ralph, "Political Tyranny and the Master-Slave Paradigm in Selected Sea-Tales of Herman Melville and Jack London", PhD thesis Purdue University 2003. https://docs.lib.purdue.edu/dissertations/AAI3113867/ Cf. also, Huebert, David, "Species Panic: Interspecies Erotics in Post-1900 American literature", PhD thesis University of Western Ontario 2018. 4. Cf. http://santarosahistory.com/wordpress/2016/11/the-case-for-arson-at-wolf-house/. Cf.Fresneau-Woodward, Servanne, "Nature animale et paysages naturels dans l'oeuvre de Jack London" Doctorat, Université de Paris X https://www.theses.fr/1987PA100174
Jerk
Jerk is the change in the acceleration of an object. Mathematically, jerk is the derivative, or the rate of change of acceleration by time. Jerk is also called jolt (in British English), surge, or lurch. Jerk is a vector and there is no word for its scalar value.
The jerk is measured in metres per second cubed (formula_1).