|
Muzzle Energy
Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle (firearm), muzzle of a firearm. Without consideration of factors such as aerodynamics and gravity for the sake of comparison, muzzle energy is used as a rough indication of the destructive potential of a given firearm or cartridge. The heavier the bullet and especially the Muzzle velocity, faster it moves, the higher its muzzle energy and the more damage it will do. Kinetic energy The general formula for the kinetic energy is E_\mathrm = \frac mv^2, where ''v'' is the velocity of the bullet and ''m'' is the mass of the bullet. Although both mass and velocity contribute to the muzzle energy, the muzzle energy is proportional to the mass while proportional to the ''square'' of the velocity. The velocity of the bullet is a more important determinant of muzzle energy. For a constant velocity, if the mass is doubled, the energy is doubled; however, for a constant mass, if the velocity is doubled, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle Velocity
Muzzle velocity is the speed of a projectile (bullet, pellet, slug, ball/ shots or shell) with respect to the muzzle at the moment it leaves the end of a gun's barrel (i.e. the muzzle). Firearm muzzle velocities range from approximately to in black powder muskets, to more than in modern rifles with high-velocity cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns firing kinetic energy penetrator ammunition. To simulate orbital debris impacts on spacecraft, NASA launches projectiles through light-gas guns at speeds up to . Several factors, including the type of firearm, the cartridge, and the barrel length, determine the bullet's muzzle velocity. Projectile velocity For projectiles in unpowered flight, its velocity is highest at leaving the muzzle and drops off steadily because of air resistance. Projectiles traveling less than the speed of sound (about in dry air at sea level) are ''subsonic'', while those traveling faster are ''super ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miljøministeriet
Ministry of the Environment of Denmark () is the Danish ministry in charge of almost all matters concerning environmental issues in Denmark. The head office is in Copenhagen. Created in 1971 as the Ministry of Pollution Combating ("''Ministeriet for forureningsbekæmpelse''"), it changed its name in 1973 to the current Ministry of the Environment. However, from 1994 to 2005 it was known as the Ministry of Environment and Energy ("''Miljø- og Energiministeriet''"), as the ministry was merged with the Ministry of Energy. In 2005, the energy sector was detached again and the ministry reverted to the old name. In a press release on 21 March 2007, the ministry announced that it would be hosting the COP-15 summit in 2009.(created on 1 January 2011 by a merger of Miljøklagenævnet and Naturklagenævnet) See also * Wind power in Denmark * Minister for the Environment (Denmark) Notes External links Ministry of the Environment 1971 establishments in Denmark Environment En ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Divided
Division is one of the four basic operations of arithmetic. The other operations are addition, subtraction, and multiplication. What is being divided is called the ''dividend'', which is divided by the ''divisor'', and the result is called the ''quotient''. At an elementary level the division of two natural numbers is, among other possible interpretations, the process of calculating the number of times one number is contained within another. For example, if 20 apples are divided evenly between 4 people, everyone receives 5 apples (see picture). However, this number of times or the number contained (divisor) need not be integers. The division with remainder or Euclidean division of two natural numbers provides an integer ''quotient'', which is the number of times the second number is completely contained in the first number, and a ''remainder'', which is the part of the first number that remains, when in the course of computing the quotient, no further full chunk of the size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ratio
In mathematics, a ratio () shows how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Similarly, the ratio of lemons to oranges is 6:8 (or 3:4) and the ratio of oranges to the total amount of fruit is 8:14 (or 4:7). The numbers in a ratio may be quantities of any kind, such as counts of people or objects, or such as measurements of lengths, weights, time, etc. In most contexts, both numbers are restricted to be Positive integer, positive. A ratio may be specified either by giving both constituting numbers, written as "''a'' to ''b''" or "''a'':''b''", or by giving just the value of their quotient Equal quotients correspond to equal ratios. A statement expressing the equality of two ratios is called a ''proportion''. Consequently, a ratio may be considered as an ordered pair of numbers, a Fraction (mathematic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quotient
In arithmetic, a quotient (from 'how many times', pronounced ) is a quantity produced by the division of two numbers. The quotient has widespread use throughout mathematics. It has two definitions: either the integer part of a division (in the case of Euclidean division) or a fraction or ratio (in the case of a general division). For example, when dividing 20 (the ''dividend'') by 3 (the ''divisor''), the ''quotient'' is 6 (with a remainder of 2) in the first sense and 6+\tfrac=6.66... (a repeating decimal) in the second sense. In metrology (International System of Quantities and the International System of Units), "quotient" refers to the general case with respect to the units of measurement of physical quantities. ''Ratios'' is the special case for dimensionless quotients of two quantities of the same kind. Quotients with a non-trivial dimension and compound units, especially when the divisor is a duration (e.g., "per second"), are known as ''rates''. For example, densi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mainland China
"Mainland China", also referred to as "the Chinese mainland", is a Geopolitics, geopolitical term defined as the territory under direct administration of the People's Republic of China (PRC) in the aftermath of the Chinese Civil War. In addition to the geographical mainland, the geopolitical sense of the term includes islands such as Hainan, Chongming Island, Chongming, and Zhoushan. By convention, territories outside of mainland China include: * Special administrative regions of China, which are regarded as subdivisions of the country, but retain distinct administrative, judicial and economic systems from those on the mainland: ** Hong Kong, formerly a British Hong Kong, British colony ** Macau, formerly a Portuguese Macau, Portuguese colony * Taiwan, along with Penghu, Kinmen, Matsu Islands, Matsu and other minor islands, are collectively known as the Taiwan Area, where has been the major territorial base of the government of the Republic of China (ROC) since 1950. Though the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firearms License
A firearms license (also known as a gun license; or licence in British English) is a license or permit issued by a government authority (typically by the police) of a jurisdiction, that allows the licensee to buy, own, possess, or carry a firearm, often subject to a number of conditions or restrictions, especially with regard to storage requirements or the completion of a firearms safety course, as well as background checks, etc. Firearms licenses are not required in all jurisdictions. Additionally, some countries or states may require by law a "permit-to-purchase" in order to buy handguns or firearms. A licence may also be required to buy ammunition. The permit or license scope varies according to what firearm(s) or activity(s) it allows the holder to legally do with the firearm. Some jurisdictions may require a firearm license to own a firearm, to engage in hunting, target shooting or collecting, or to carry a concealed firearm, or operate a business (such as being a gun d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Guns
An air gun or airgun is a gun that uses energy from compressed air or other gases that are mechanically pressurized and then released to propel and accelerate projectiles, similar to the principle of the primitive blowgun. This is in contrast to a firearm, which shooting, shoots projectiles using energy generated via exothermic combustion (detonation) of chemical propellants, most often black powder or smokeless powder. Air guns come in both long gun (air rifle) and handgun (air pistol) forms. Both types typically propel metallic projectiles that are either diabolo-shaped pellet (air gun), pellets or spherical round shot, shots called BB (ammunition), BBs, although in recent years Minié ball-shaped cylindro-conoidal bullet, cylindro-conoidal projectiles called slug (projectile), slugs are gaining more popularity. Certain types of air guns (usually air rifles) may also launch fin-stabilized projectile such as flechette, darts (e.g., tranquilizer guns) or hollow-shaft arrows (s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gun Legislation In Germany
In Germany, access to guns is controlled by the German Weapons Act (), which adheres to the European Firearms Directive and was first enacted in 1972, and superseded by the law of 2003. This federal statute regulates the handling of firearms and ammunition as well as acquisition, storage, commerce and maintenance of firearms. In a debate on stricter gun control after a school shooting that resulted in 16 deaths, German weapons expert Holger Soschinka asserted that "Germany has one of the strictest weapons laws worldwide - and it is sufficient". However, others criticized it as too lax and argued that more control is needed, with one anti-weapons group describing the law as "unconstitutional" because it "puts the interests of sport shooters above peoples' right to life and physical integrity". While gun ownership is widespread, and associations and ranges for shooting sports and the use of historical guns and weapons in festivals are not forbidden, the use of guns for private self ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airsoft Guns
Airsoft guns are air guns used in airsoft sports. They are a special type of low-power smoothbore guns designed to shoot Airsoft pellets, plastic pellets often colloquially (but incorrectly) referred to as "BB (ammunition), BBs", which are typically made of (but not limited to) plastic or biodegradable polymer, biodegradable resin materials. Airsoft gun powerplants are designed to have low muzzle energy ratings (generally more than 1.1 Joule, J, or 1.1 Foot-pound (energy), ft⋅lb) and the bullets have significantly less penetration (weaponry), penetrative and stopping power than conventional airguns, and are generally safe for competitive sporting and recreational purposes if proper protective gear is worn. Depending on the design mechanism for bullet propulsion, airsoft guns fall into two groups. One group is mechanical guns, which consist of a coil spring-loaded piston pump, piston air pump that is either manually cocked (e.g., spring guns) (these are commonly referred to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total population of over 84 million in an area of , making it the most populous member state of the European Union. It borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The Capital of Germany, nation's capital and List of cities in Germany by population, most populous city is Berlin and its main financial centre is Frankfurt; the largest urban area is the Ruhr. Settlement in the territory of modern Germany began in the Lower Paleolithic, with various tribes inhabiting it from the Neolithic onward, chiefly the Celts. Various Germanic peoples, Germanic tribes have inhabited the northern parts of modern Germany since classical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
