Another guess about where question mark comes from says that it comes from the 9th century, when it was a point followed by the curved part written slanted.
Some writers put a space between the end of their sentence and the question mark. This is thought to come from a French practice and is called French spacing. In French a space is always put before question marks, exclamation marks, colons, and semicolons. In English, however, using this space is thought of as bad form. The "Oxford English Dictionary" does not encourage it. Some English books do have these spaces, but are often a very thin space, which are not full spaces but an attempt to make the words easier to read.
In computing, the question mark character is represented by ASCII code 63, and is located at Unicode code-point U+003F. The full-width (double-byte) equivalent, ？, is located at Unicode code point U+FF1F.
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Kevin Federline
Kevin Earl Federline (born March 21, 1978) is an American entertainer, who dances, raps and models as his job. He is famous for being the former husband of pop singer Britney Spears. Federline has 4 kids, 2 with actress Shar Jackson and 2 with Spears.
Mercyful Fate
Mercyful Fate are a heavy metal band from Denmark. The band was formed in Copenhagen in 1980.
Basic
Basic may be:
Electrical circuit
A circuit is a closed path that consists of circuit components in which electrons from a voltage or current source flow back and fourth. If the circuit consists of electric components like a resistor, a capacitor, an inductor etc. then it will be called an Electrical circuit and if the circuit consists of any of the electronic circuit components like a diode, a Transistor etc. then it will be called an Electronic circuit. So, the electronic circuits may consist both of the electrical and electronic circuit components, but an electrical circuit will have only the electrical components.
The point where electrons enter an electrical circuit is called the "source" of electrons. The point where the electrons leave an electrical circuit is called the "return" or "earth ground". The exit point is called the "return" because electrons always end up at the source when they complete the path of an electrical circuit.
The part of an electrical circuit that is between the electrons' starting point and the point where they return to the source is called an electrical circuit's "load". The load of an electrical circuit may be as simple as those that power home appliances like refrigerators, televisions, or lamps or more complicated, such as the load on the output of a hydroelectric power generating station.
Circuits use two forms of electrical power: alternating current (AC) and direct current (DC). AC often powers large appliances and motors and is generated by power stations. DC powers battery-operated vehicles and other machines and electronics. Converters can change AC to DC and vice versa. High-voltage direct current transmission uses big converters.
Electronic circuits usually use direct current sources. The load of an electronic circuit may be as simple as a few resistors, capacitors, and a lamp, all connected together to create the flash in a camera. Or an electronic circuit can be complicated, connecting thousands of resistors, capacitors, and transistors. It may be an integrated circuit such as the microprocessor in a computer.
Resistors and other circuit elements can be connected in series or in parallel. Resistance in series circuits is the sum of the resistance.
A circuit or wiring diagram is a visual display of an electrical circuit. Electrical and electronic circuits can be complicated. Making a drawing of the connections to all the component parts in the circuit's load makes it easier to understand how circuit components are connected. Drawings for electronic circuits are called "circuit diagrams". Drawings for electrical circuits are called "wiring diagrams". Like other diagrams, these diagrams are usually drawn by draftsmen, and then printed. Diagrams may also be created digitally using specialised software.
A schematic is a diagram of an electrical circuit. Schematics are graphical representations of the essential connections in a circuit, but they are not lifelike depictions of a circuit. Schematics use symbols to represent components in the circuit. Conventions are used in a schematic to represent the way electricity flows. The common convention we use is from the positive to the negative terminal. The realistic way electricity flows is from the negative to the positive terminal.
Circuit diagrams use special symbols. The symbols on the drawings show how components like resistors, capacitors, insulators, motors, outlet boxes, lights, switches, and other electrical and electronic components are connected together. The diagrams are a big help when workers try to find out why a circuit does not work correctly.
The current flowing in an electrical or electronic circuit can suddenly increase when a component part fails. This can cause serious damage to other components in the circuit, or create a fire hazard. To protect against this, a fuse or a device called a "circuit breaker" can be wired into a circuit. The circuit breaker will open, or "break", the circuit when the current in that circuit becomes too high, or the fuse will "blow". This gives protection.
The standard return for electrical and electronic circuits is the earth ground. When an electrical or electronic device fails, it may open the return circuit to the earth ground. The user of the device could become a part of the device's electrical circuit by providing a return path for the electrons through the user's body instead of the circuit's earth ground. When our body becomes part of an electrical circuit, the user can be seriously shocked, or even killed by electrocution.
To prevent the danger of electrical shock and the possibility of electrocution, ground fault interrupts devices detect open circuits to earth ground in attached electrical or electronic devices. When an open circuit to earth ground is detected, the G.F.I. device immediately opens the voltage source to the device. G.F.I. devices are similar to circuit breakers but are designed to protect humans rather than circuit components.
Short circuits are circuits that get back to the power source unused or with the same power as put out. Using these usually blow a fuse but sometimes they don't. Doing this with a battery can cause electrical fires.
Quiz
A quiz is a type of game in which players (as individuals or in teams) try to answer questions correctly. Quizzes are also used in education and similar fields to improve the growth of someone's knowledge, abilities, and/or skills.
Quizzes are usually scored in points. Many quizzes are designed for people to determine the winner of a group of participants - usually the participant with the highest score.
John Hancock
John Hancock (January 12, 1737 – October 8, 1793) was an early American patriot, a leader in the American Revolutionary War, and an American statesman. He was the first man to sign America's Declaration of Independence. In modern America, "John Hancock" is a synonym for signature.
Hancock's ancestors arrived in the English colonies in 1652. In 1737, Hancock was born in Braintree (now Quincy, Massachusetts). When John Hancock Jr. his father died, he was adopted by his uncle, a merchant in Boston, Massachusetts. At his uncle's death in 1754, Hancock inherited the business. He became a leading merchant in Boston and one of the richest in the colonies.
In 1768, British officials seized his ship, the "Liberty". It carried a shipment of wine. The officials said he was smuggling. Boston patriots rioted and he was acquitted. This incident was one of the events that led to the American Revolutionary War.