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Nitrogen narcosis

Nitrogen narcosis is a problem for underwater divers. It affects the brain and nervous system a lot like alcohol, but goes away when the diver rises to a shallower depth. It does not have lasting effects after the depth is reduced.

                                               

Pepper spray

Pepper spray is a spray used for self-defence, by spraying it into an attackers face. It makes eyes water and causes intense pain, sometimes even leading to temporary blindness. Pepper spray is an inflammatory agent. When someone is sprayed with ...

                                               

List of R-phrases

R8: Contact with combustible material may cause fire R42: May cause sensitisation by inhalation R66: Repeated exposure may cause skin dryness or cracking R5: Heating may cause an explosion R32: Contact with acids liberates very toxic gas R38: Irr ...

                                               

Residual-current device

A ground fault circuit interrupter, or Residual Current Device is a type of circuit breaker which shuts off electric power when it senses an imbalance between the outgoing and incoming current. The main purpose is to protect people from an electr ...

                                               

Risk and Safety Statements

Risk and Safety Statements are codes that show the hazards of certain chemicals. There are certain R phrases and S phrases. For example, R34 states that the chemical may cause burns. S36 says to wear protective clothing.

                                               

Road safety

Road safety is safety in using roads. There are ways to make roads safe for motor traffic, cyclists and pedestrians. It involves rules such as speed limits and those about drinking and driving, and control systems, such as traffic lights and cros ...

                                               

Roll cage

A roll cage is a specially designed protective frame built in the passenger compartment of a vehicle. Generally made of welded steel tubing, a roll cage is a safety feature in the event of a rollover or crash. Roll cages are used mainly in auto r ...

                                               

List of S-phrases

S25: Avoid contact with eyes S15: Keep away from heat S62: If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label S47: Keep at temperature not exceeding. °C to be specified by the manufacturer S42: ...

                                               

Safety

Safety is a feeling that no bad things will happen. Security avoids things to happen that you dont want to. The police keep public safety, which stops crimes happen. Safety hats protect the head from injury. Houses provide safety from the weather.

                                               

Safety lamp

The first safety lamp was invented by William Reid Clanny. It used bellows and water to separate gasses. Later, two newer designs were invented. One newer design was the Geordie lamp, made by George Stephenson, and the other was the Davy lamp, ma ...

                                               

Smokey Bear

Smokey Bear is a mascot of the United States Forest Service. He was made to teach people that forest fires are dangerous and how people can prevent them. An advertising campaign featuring Smokey was started in 1944 with the slogan, "Smokey Says – ...

                                               

Stroller

A stroller or pram is a hand-pushed vehicle to carry babies and young infants. More general terms include child carrier, baby transport or baby carrier.

                                               

Tornado drill

A tornado drill is something people do to practice what they would do if there were a tornado. It is usually done in a building such as a school or office. It starts with a signal such as an alarm or a spoken message over an intercom. After they ...

                                               

Traffic cone

Traffic cones are cone-shaped markers, usually made from plastic, that are put on roads to temporarily redirect automobile traffic in a safe manner.

                                               

Circular knitting

Circular knitting or knitting in the round is a form of knitting that creates a seamless tube. It is done with circular or double-pointed needles. Socks, mittens, and sweaters can be made with circular knitting.

                                               

Glassworking

                                               

Practice

Practice or practise is the act of repeating a behavior over and over, or doing an activity again and again. It is a way to learn things faster, by repeating them. For example, sport teams practice to prepare for real games, or a musician practic ...

                                               

Skill

A skill or technique is a learned ability to do something. It could be playing a musical instrument or playing a kind of sport or even doing something simple like using a corkscrew. Someone who is trying to do something but not succeeding may be ...

                                               

Camaloon

Camaloon is an e-commerce company based in Barcelona, Spain. Camaloon is best known for printing services for Corporate Gifts, custom products & promotional merchandise.

                                               

Envelope

An envelope is a form of packing. Envelopes are used for sending letters or documents using regular postal mail. Envelopes are usually made of paper or hardened paper. An envelope may be small enough to make you need to fold the paper going into ...

                                               

File folder

A file folder, also called a folder, is a type of folder that can hold pieces of paper together. Folders are used both to organize pieces of paper neatly and to protect pieces of paper from falling off. Folders are usually made of a thick piece o ...

                                               

Paper clip

A paper clip is usually a thin wire in a shape that is wrapped in on itself. It is used to hold two or more pieces of paper together by pressure. Some other kinds of paper clips use two pieces. The type of wire paper clip that is usually used was ...

                                               

Scrapbook

A scrapbook is a book where people can keep pictures, newspapers articles, recipes, letters and similar things. It is often used to keep memorable things or a collection of things. It is also often used in the hobby of scrapbooking. Scrapbooking ...

                                               

Sticker

A Sticker is a type of label: a piece of printed paper, plastic, vinyl, or other material with adhesive on one side. They can be used for decoration for functional purposes, depending on the situation. They are also collected and traded among oth ...

                                               

Time

Time is the never-ending continued progress of existence and events. It happens in an apparently irreversible way from the past, through the present to the future. To measure time, we can use anything that repeats itself regularly. One example is ...

                                               

24-hour clock

The 24-hour clock is a way of telling the time in which the day runs from midnight to midnight and is divided into 24 hours, numbered from 0 to 24. It does not use a.m. or p.m. This system is also referred to as military time or as continental ti ...

                                               

Ab urbe condita

The phrase is Latin. It literally means from when the city was founded. The city talked about is the city of Rome. This way of measuring time was not used in Classical antiquity. The first to have used it was the historian Orosius, about 400 AD.

                                               

Absolute space and time

Absolute space and time are concepts used by Aristotle and by Newton. They are still used in classical mechanics. Even in Newtonian mechanics, the notion of inertial frame of reference is used. The concepts of space and time were separate before ...

                                               

Anno Domini

Anno Domini, shortened as AD or A.D., is used to refer to the years after the birth of Jesus. AD is also a shortening for Christian Era. Similarly, Before Christ, shortened as BC or B.C., is used in the English language to refer to all years befo ...

                                               

Bicentennial

A bicentennial is the two hundredth year of something. In the United States, bicentennial is commonly is used to refer to the year 1976. This is because 1976 is two hundred years after the country was started in 1776. In Australia it commonly mea ...

                                               

Big Rip

In physical cosmology, the Big Rip is a hypothetical cosmological model which describes the ultimate fate of the universe. According to this theory all the matter of the universe from stars and galaxies to atoms and subatomic particles, and even ...

                                               

Common Era

Common Era or Christian Era is a method used to identify a year. It means "a year in our time". It is the system for recording dates used almost everywhere around the world today: it is in common use. CE is an alternative to the AD, system used b ...

                                               

Countdown

                                               

Deadline

A deadline is a time by which some task must be completed. Very often, it means a time limit that is set in place by an authority - for example, a teacher tells students that they must turn in their homework in by a certain time. This is so the t ...

                                               

Diamond Jubilee

                                               

Equinox

An equinox is when the sun passes directly over the equator. There are two equinoxes each year. Equinox can also mean either of the two days when this happens. On these days, the nights are equal in length at latitudes L° North and L° South. The ...

                                               

Eternity

                                               

Future

The future is something that has not happened yet. Once that something has happened, it is called the past. If it is happening now, it is called the present. Movies, television shows and books that tell made-up stories about the future are often ...

                                               

Generation

A generation is used to mean the average amount of time between the birth of parents and the birth of their children. It is also used to mean all the people on one level of a family tree. For example, your brothers, sisters and cousins are in the ...

                                               

Graveyard slot

A graveyard slot is a timeslot during the early morning hours, between 2:00 to 6:00 a.m., after late night television and before morning news shows. Many people are sleeping at home, or in work away from the television. The timeslot mainly shows ...

                                               

Kali Yuga

In Hinduism, Kali Yuga, is one of the four stages or yugas that the world goes through. Traditionally, most Hindus believe that the Kali Yuga is 432.000 years long. Kali Yuga is also recognized and stated in Sikhism, in the Guru Granth Sahib.

                                               

Late night television

Late night television is a timeslot after primetime and before the overnight graveyard slot. It runs from 11:30 p.m. to 2:00 a.m. Eastern Time. In the United States, local news precedes the block. Shows include The Late Show with Stephen Colbert ...

                                               

Lorentz transformation

The Lorentz transformations is a set of equations that describe a linear transformation between a stationary reference frame and a reference frame in constant velocity. The equations are given by: x ′ = x − v t 1 − v 2 c 2 {\displaystyle x={\frac ...

                                               

Metric time

Metric time is a way of measuring how long a period of time is using the metric system. The metric system uses the second as a main unit of time. There are periods of time that are based on the second but shorter. They are named with metric prefi ...

                                               

Past

The past is something that has already happened. If something has not happened yet, it is called the future. Professors and researchers that study the events of the past, and try to explain why these events happened are called history professors ...

                                               

Primetime

Primetime is a timeslot on most networks running from 8:00 to 11:00 p.m. Eastern and 7:00 to 10:00 p.m. Central and Mountain. It is the most watched timeslot on television. It is before late night television.

                                               

Schedule

A schedule is a plan for accomplishing certain things on certain dates. Many people use a schedule to help them be organised. Jobs often require their employees to use a schedule and turn in projects or documents on certain dates.

                                               

Synchronization

Synchronization is the co-ordination of a set of events into a system that works according to time. For example, a conductor of an orchestra serves to keep the orchestra in time, or synchronized. Systems that operate with all their parts in synch ...

                                               

Time dilation

Gravitational time dilation is a physics concept about changes in the passage of time, caused by general relativity. A clock in outer space moves more quickly than a clock on Earth. Heavy things like planets create a gravitational field that slow ...

                                               

Time horizon

A time horizon is a future point in time when something must be "done" or will be "over". Either way, the matter will be closed when the time horizon is reached. Common time horizons people use are: end of calendar year and end of fiscal year. en ...

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Pino - logical board game which is based on tactics and strategy. In general this is a remix of chess, checkers and corners. The game develops imagination, concentration, teaches how to solve tasks, plan their own actions and of course to think logically. It does not matter how much pieces you have, the main thing is how they are placement!

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