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Attosecond

An attosecond is a very short period of time. It is equal to one quintillionth of a second. It can also be written as 10 −18 seconds. Because it can be hard to think about how short this period of time is, on this page is a list of descriptions o ...

                                               

Century

A century is a way to describe a length of time. One century is one hundred years. The ancient Romans used the word centuria to describe a group of about one hundred soldiers, organized into a single unit. The Roman numeral for 100 is "C". The wo ...

                                               

Day

A day is the time it takes the Earth to spin around once. It is day time on the side of the Earth that is facing the Sun. When it is night time, that side of the Earth is facing away from the Sun. It takes 24 hours for the Earth to spin once, so ...

                                               

Decade

A decade is a period of 10 years. The word comes from the Ancient Greek word for ten: "deka". 10 decades make a century, while 100 decades make a millennium. A decade is any 10 year period: There are different ways to refer to different groupings ...

                                               

Eon

An eon is a term in Earth science for the longest periods of time. It describes a part of the Earths existence lasting hundreds of millions of years. Typically one billion years according to most geologists. A geologic eon is part of Earths exist ...

                                               

Era

An era in geology is a time of several hundred million years. It describes a long series of rock strata which geologists decide should be given a name. An example is the Mesozoic era, when dinosaurs lived on the Earth. An era is made up of period ...

                                               

Fortnight

A fortnight is a unit of time equal to 14 days. The word comes from the Old English: fēowertyne niht, meaning fourteen nights ". Some wages and salaries are paid every fortnight; however, in North America it is more common to use the term biweekl ...

                                               

Gigasecond

A gigasecond is one billion seconds. That is about 31.7 years. It can be written as 10 9 seconds. 3.16 Gs is about 1 century 100 years. 31.6 Gs is about 1 millennium 1000 years. This page lists times of between 1 and 1000 gigaseconds, or between ...

                                               

Hectosecond

A hectosecond is equal to 100 seconds. It can be written as 10 2 seconds. There are 10 hectoseconds in a kilosecond, which is 1000 seconds. There are 10 decaseconds in one hectosecond. 8.86 hectoseconds - half-life of a free neutron 3.15 hectosec ...

                                               

Kilosecond

A kilosecond is 1000 seconds. It can be written as 10 3 seconds. It is equal to 16 minutes, 40 seconds. There are 86.4 kiloseconds in a day. 86.4 kiloseconds = 24 hours = one day 799.2 kiloseconds = 9.25 days - half life of thulium-167 28.8 kilos ...

                                               

Megasecond

A megasecond is one million seconds. This page lists times between 10 6 seconds and 10 9 seconds, which is about 11.6 days and 0.0317 years. Ten megaseconds is equal to 115.74 days. 100 megaseconds is equal to 3.2 years.

                                               

Microsecond

A microsecond is one millionth of a second. This page lists times between 10 −6 seconds and 10 −5 seconds. One microsecond contains 1000 nanoseconds. There are 1000 microseconds in one millisecond. 2 microseconds – the life time of a muonium part ...

                                               

Millisecond

A millisecond is one thousandth of a second. To help you understand how fast a milisecond is, try this video. This page lists times between 10 −3 seconds and 10 −2 seconds. One millisecond contains 1000 microseconds. There are 1000 milliseconds i ...

                                               

Nanosecond

A nanosecond is one billionth of a second. It is equal to 10 −9 seconds. One nanosecond is equal to 1000 picoseconds. 1000 nanoseconds is equal to one microsecond. Ten nanoseconds are sometimes called a shake. Some things that take between one na ...

                                               

Picosecond

A picosecond is an standard unit of measuring time. It is equal to 10 −12 of a second. That is one trillionth, or one millionth of one millionth of a second, or 0.000000000001 seconds. Notation -10 seconds is 100 picoseconds. 10 -9 seconds is 1 n ...

                                               

Planck time

The Planck time is the length of time at which no smaller meaningful length can be validly measured due to the indeterminacy expressed in Werner Heisenbergs uncertainty principle. Theoretically, this is the shortest time measurement that is possi ...

                                               

Second

The second, is a unit of time. There are around 60 seconds in a minute, 60 minutes in an hour, and 24 hours in a day. This tradition dates back to the Babylonian. In science, a second is the time it takes for a caesium atom to vibrate 9.192.631.7 ...

                                               

Terasecond and longer

A terasecond is one trillion seconds. That is about 31.700 years. It can be written as 10 12 seconds. Here is a list of time spans longer than 1 terasecond: 10 18 seconds = 1 exasecond = 31.7 billion years 10 24 seconds = 1 yottasecond = 31.7 qua ...

                                               

Week

A week is 7 days in connecting order. There are usually 52 weeks in a year. In the English language, the days of the week are named after gods in Norse mythology, except for Saturday, which is named after a Roman god. Depending on the law of a co ...

                                               

Year

One year is about 365 days long. It is the time it takes the Earth to go completely around the sun once. A year is actually 365.2422 days long, but a calendar has 365 days, except in a leap year. The year starts on January 1 and ends on December ...

                                               

Drover (company)

Drover is a London based company providing vehicle subscriptions. Users pay a recurring fee for the right to use a car with insurance, maintenance, tax, MOT and breakdown cover, and can swap vehicles during the subscription or to cancel their sub ...

                                               

Van Hool

Van Hool is a Belgian company, which builds buses. It was founded in 1947 by Bernard Van Hool. The headquarters are in Koningshooikt Antwerp. They have got 15 different buses for the city. 9 of them have got a normal engine, 4 have got an engine ...

                                               

Elevator

An elevator or lift is a vertical transport vehicle that efficiently moves people or goods between floors of a building. They are generally powered by electric motors that either drive traction cables and counterweight systems, or pump hydraulic ...

                                               

Paternoster

A Paternoster is a type of elevator. Its design is different from that of other elevators. It has several cabins that constantly move up and down. They are linked on a chain. People can stop on or off at any floor they like. Paternosters have adv ...

                                               

Transmission medium

A transmission medium is something that can transmit energy. For example, the transmission medium for sounds is usually air. But sound can also be transmitted through solids and liquids. A wire can transmit electrons in the form of electricity. T ...

                                               

Corps of Bridges and Roads (France)

The Corps of Bridges is a French civil service corps. People entering the Corps are trained at the Ecole des Ponts ParisTech. Most of them are from the Ecole Polytechnique. The rest come from the Ecole Normale Superieure. In 2002, the corps of th ...

                                               

History of the automobile

The early history of the automobile can be divided into a number of eras, based on method of propulsion. Later periods were defined by trends in exterior styling, size, and utility preferences. The question of who invented the first automobile de ...

                                               

London Passenger Transport Board

The London Passenger Transport Board was the organisation responsible for public transport in London, England, United Kingdom, and its environs from 1933 to 1948. In common with all London transport authorities from 1933 to 2000, the public name ...

                                               

Metlink

This article is about the Melbourne public transport network. The same name is also used for public transport in Wellington. Metlink is the marketing name for all public transport operators in Melbourne, Australia.

                                               

SPRAT

The SPRAT is an assault bridge built on a military heavy truck. It is made in France and used by the French army. Its purpose is as a mobile bridge for military vehicles. It was used starting in 2011. Within the forward edge of battle, the PTA is ...

                                               

Air navigation

Air navigation is navigation while flying. It is used by pilots in aircraft to know their exact position and fond their way. That is important because if they get lost, they can hit a mountain or fly into a dangerous area or not find a place to l ...

                                               

Bearing (navigation)

In navigation, the word bearing is used for different methods that try to find out the angle between an object used for this purpose, and a reference direction. There are different systems of reference that can be used for this. A system of refer ...

                                               

Book of the Consulate of the Sea

The Book of the Consulate of the Sea or Book of the Consulate of Sea is a 15th-century maritime commercial law treaty. Is a compendium of maritime law that governed trade in the Mediterranean for centuries. Of Catalan origin, it was translated in ...

                                               

Buoy

A buoy is a floating device that can have many uses. It is usually anchored in a certain place. The word is most commonly said, but in American English it is often pronounced.

                                               

Car navigation

Car navigation allows an automobile driver to see where he or she is on a map at any given time. Automobile navigation can rely on GPS, or it can be DVD- or data-based. GPS-bsed navigation uses radio signals from special satellites that send thei ...

                                               

Dead reckoning

Dead Reckoning is a method of estimating a position. It is an important part of navigation. It uses the last known point, and speed and direction the vehicle or person has moved since it was at the fix, to make a good guess where the current posi ...

                                               

Satellite navigation

A satellite navigation or satnav system is a way of pinpointing position very exactly. Satnav uses a system of satellites. The system gives exact positioning. It allows small electronic receivers to find their position. The position is given with ...

                                               

Ship

A ship is a large vehicle used to travel on water. It is bigger than a boat. Most are cargo ships, which carry most of the worlds international trade. There are also many warships, passenger ships and other kinds for different purposes.

                                               

Public transport

Public transport is the transport of passengers. Passengers dont need their own cars or other vehicles. Most public transport lets many people travel at the same time.

                                               

Alaska Marine Highway

The Alaska Marine Highway or the Alaska Marine Highway System is a ferry service operated by the government of the U.S. state of Alaska. It is based in Ketchikan, Alaska. The ferries have many different ways of being used. Passengers can stay ins ...

                                               

Brihanmumbai Electric Supply and Transport

The BEST or the Brihanmumbai Electricity Supply and Transport is Mumbais public transport service and electricity provider. The government owned organisation, which was set up in 1873, operates one of Indias largest bus fleets. Originally setup a ...

                                               

Free travel pass

A free travel pass is when certain passengers can use buses, trains or trams without paying a fare or presenting a ticket. They may need to present an identification card produced by their employer, or by the transport provider.

                                               

Massachusetts Bay Transportation Authority

The Massachusetts Bay Transit Authority is Massachusetts public transportation system. The MBTA opened on September 2, 1897. Its first line, the Green Line, was the first subway in the Western Hemisphere. At first, it connected only the Boston Pu ...

                                               

Mobility as a service

Mobility as a Service is transportation that you can buy but do not have to own. For example, you can pay an Uber car to pick you up, but you do not own that car. Or you can pay for a city bike to travel around the city, but you do not own the bi ...

                                               

Rickshaw

A riksha or rickshaw is a kind of vehicle that has two wheels. They are usually pulled by a human but there are types that have been changed to be pulled by a bicycle or have their own motor.

                                               

Taxi

A taxi is a car, or other vehicle which is used for public transport. People use them to get to where they want to go. This means there are no stops in between where they get on and where they get off. Many big cities have taxis. In most other ty ...

                                               

Taxicab stand

A taxicab stand is a queue area on a street or on private property where taxicabs line up to wait for passengers.

                                               

Spaceflight

Spaceflight is when a thing made by man flies into outer space. A spaceflight can happen with or without humans on board. The Russian Soyuz program, the US Space Shuttle and the International Space Station are examples of manned missions for spac ...

                                               

Wernher von Braun

Wernher Magnus Maximilian Freiherr von Braun was a German engineer and scientist. He worked as a rocket designer between the 1930s and 1970s. Some people say he was the most important rocket engineer of the 20th century. He worked for the Nazis d ...

                                               

Extravehicular activity

Extravehicular activity is when an astronaut or cosmonaut gets out of a spacecraft in outer space, then gets back in. "Extravehicular activity" usually refers to a spacewalk outside a spacecraft orbiting the Earth, but can also refer to a moonwal ...