Fire extinguisher

A fire extinguisher, or extinguisher, is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the expertise of a fire department. Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire.

In the United States, fire extinguishers in all buildings other than houses are generally required to be serviced and inspected by a fire protection service company at least annually. Some jurisdictions require more frequent service for fire extinguishers. The servicer places a tag on the extinguisher to indicate the type of service performed (annual inspection, recharge, new fire extinguisher).

Dry

Dry or dryness denotes a lack of water. It may also refer to:

Common meanings

Places

People

Art, entertainment, and media

Film

Literature

Music

Techniques

Works

Albums

Songs

Chemical substance

A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys.

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.

Chemical substances exist as solids, liquids, gases or plasma, and may change between these phases of matter with changes in temperature or pressure. Chemical reactions convert one chemical substance into another.

Fire

Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition.

Fire is hot because conversion of the weak double bond in molecular oxygen, O₂, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O₂); the bond energies of the fuel play only a minor role here. At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.

Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Fire has been used by humans for cooking, generating heat, light, signaling, and propulsion purposes. The negative effects of fire include hazard to life and property, atmospheric pollution, and water contamination. If fire removes protective vegetation, heavy rainfall may lead to an increase in soil erosion by water. Also, when vegetation is burned, the nitrogen it contains is released into the atmosphere, unlike elements such as potassium and phosphorus which remain in the ash and are quickly recycled into the soil. This loss of nitrogen caused by a fire produces a long-term reduction in the fertility of the soil, which only slowly recovers as nitrogen is "fixed" from the atmosphere by lightning and by leguminous plants such as clover.

Carry Out

Carry Out is a song recorded by American rapper and producer Timbaland for his third studio album Shock Value II (2009). The song features guest vocals from longtime collaborator, American recording artist Justin Timberlake. Timbaland and Timberlake co-wrote the song with Timothy "Attitude" Clayton, Jim Beanz and Jerome "J-Roc" Harmon; with Harmon co-producing the song with Timbaland. Mosley Music Group, together with Blackground and Interscope Records, serviced the song to contemporary hit radio on December 1, 2009 in the United States, as the third single from Shock Value II.

Carry Out received a mixed response from contemporary music critics, with many being divided on the song's composition and lyrical content. Carry Out's lyrics use the term 'carry out' as metaphor for sex. Most found the song to be one of the album's best tracks, but criticized the use of food-sex metaphors and deemed the song to be lacking in creativity. The song also received comparisons to The Lonely Island's 2006 single Dick in a Box, in which Timberlake was featured. "Carry Out" peaked within the top ten of the charts in Canada, the Republic of Ireland and the United Kingdom. The song's accompanying music video, directed by Bryan Barber, features Timbaland and Timberlake surrounded by women, which they attempt to seduce while dressed in fast-food restaurant themed costumes.