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Atomic force microscope

Atomic force microscopes are a type of microscope. AFMs provide pictures of atoms on or in surfaces. Like the scanning electron microscope, the purpose of the AFM is to look at objects on the atomic level. In fact, the AFM may be used to look at ...

                                               

Electron microscope

An electron microscope is a scientific instrument which uses a beam of electrons to examine objects on a very fine scale. In an optical microscope, the wavelength of light limits the maximum magnification that is possible. As electrons have a sma ...

                                               

Fluorescence microscope

A fluorescence microscope is an optical microscope that uses fluorescence and phosphorescence to study organic or inorganic substances. "Fluorescence microscope" means any microscope that uses fluorescence to make a picture. This applies whether ...

                                               

Light microscope

A light microscope works like a refracting telescope except that the object is very close to the objective lens. An object to be studied, for example a tiny organism so small it looks like just a dot, is put on a slide, which is usually a flat pi ...

                                               

Scanning tunneling microscope

Scanning tunneling microscopy is a way to view atoms. It was developed in 1981. It was invented by Gerd Binnig and Heinrich Rohrer at IBM Zurich. They won the Nobel Prize in Physics for inventing it in 1986. For STM, good resolution is 0.1 nm lat ...

                                               

Clock

A clock is a device that tells the time. Some clocks can give the date as well as the time and a few give other information. There are different types of clocks. A watch is a type of clock that is small and can be carried. Watches are usually wor ...

                                               

Watch

A watch is a small clock carried or worn by a person. It makes it easy to see the time. It is also a fashion accessory for men and women, and expensive watches are designed for this purpose. A watch may be one of the few accessories worn by a per ...

                                               

Astronomical clock

An astronomical clock is a clock with special mechanisms and dials to display astronomical information. It shows the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. Some examples are large public clocks, ...

                                               

Atomic clock

An atomic clock is a clock that works with atoms, as opposed to most other clocks which are mechanical. The frequency comes from the crossing radiation of electrons. Atomic clocks are currently the most exact clocks of the world. They are also ca ...

                                               

Clock Cabinet

The Clock Cabinet is a room at Versailles. It is one of the rooms in the kings private cabinets. An astronomical clock stands in the room. Louis XV took great interest in astronomy. The clock shows the time, the day of the week, the month, the ye ...

                                               

Japanese clock

The Japanese clock is a device made to tell the time according to Japanese tradition. These clocks were introduced to Japan via Jesuit missionaries in the 16th century. In 1612, the clockmaker of Philip II of Spain created a working timepiece whi ...

                                               

Sundial

A sundial shows the current solar time during the day. It does this because the sun appears to move through the sky. At different times in the day when the sun is shining, a shadow is cast in different places on the dial. A person marks the dial ...

                                               

Clinical thermometer

A clinical thermometer is a thermometer used to measure human body temperature. Most made in the 20th century are mercury-in-glass thermometers. They are accurate and sensitive, having a narrow place where the mercury level rises very fast. A kin ...

                                               

Liquid crystal

Liquid crystals are special substances that are usually liquid, but that show certain properties of a solid crystal. A liquid crystal may flow like a liquid, but its molecules may be rotated in a crystal-like way. There are many different types o ...

                                               

Weather vane

A weather vane is a device with a freely rotating pointer used to indicate the direction of the wind. Weather vanes served as simple devices for showing the direction of the wind and its speed for centuries. They were a critical tool for agricult ...

                                               

Ballistics

Ballistics is a science about the motion of projectiles, mainly about bullets which are fired from guns. This science shows us the path and behavior of projectiles. Gun ballistics may be divided into the following four categories. Terminal ballis ...

                                               

Ballistic coefficient

In ballistics, the ballistic coefficient of a bullet is a measure of its ability to overcome air resistance in flight. A high BC means the object will slow down less. It will have more of its speed left when it reaches the target. BC depends on m ...

                                               

Bullet

Bullets are small metal objects fired from guns. Many kinds of bullets are made from lead covered with copper. They are put into a package called a cartridge. The cartridge is put into a gun. The bullet is at the front of the cartridge. The bulle ...

                                               

Heated shot

Heated shot is the heating of round shot before firing from muzzle-loading cannons. The purpose is for setting fire to enemy warships, buildings, or equipment. The use of shot dates back centuries. It was stopped when vessels armored with iron re ...

                                               

Missile

In general, missile may refer to anything thrown or launched object at a target like a javelin or darts. Nowadays, it means, mostly, a self-propelled guided weapon system. Missiles are used in war to destroy military targets. Missiles can carry e ...

                                               

Ohka

The Yokosuka MXY-7 Ohka was a type of airplane rocket, used for suicide attacks by the Empire of Japan in the last months of World War II. The United States gave the aircraft the name Baka. It was carried by a bomber that dropped it when close en ...

                                               

Projectile

A projectile is something that is sent flying through the air, usually as a weapon. Any solid object that is thrown or fired out of something is a projectile. For example, an arrow fired from a bow, a bullet, or even a rock from a slingshot are a ...

                                               

Rocket

A rocket may be a missile, spacecraft, aircraft or other vehicle which is pushed by a rocket engine. Some big rockets are launch vehicles and some are manned. Other rockets, for example missiles, are unmanned. Most rockets can be launched from th ...

                                               

Rocket launcher

A rocket launcher is a weapon that shoots rockets. Rockets are explosives that fly towards their targets by burning fuel. Some rocket launchers are mounted on a truck, and others are a type of recoilless rifle. They were invented by the Chinese a ...

                                               

Arkalochori Axe

The Arkalochori Axe is a bronze double axe, probably from the 17th century BC. The axe was found in a cave on Crete, in 1934. Other items were also found together with the axe. Possibly, there was an earthquake which rendered the cave inaccessibl ...

                                               

Bayonet

A bayonet is a knife- or dagger-shaped weapon. It is designed to be attached to a rifle barrel or similar weapon. This will turn the gun into a spear. It is a close-combat or last-resort weapon.

                                               

Ka-Bar

Ka-Bar is a combat knife first obtained by the United States Marine Corps in November 1942. It was then designated as the 1219C2 combat knife. Later it was called the USMC Mark 2 combat knife. When the United States Navy obtained the knife they c ...

                                               

Chemical warfare

Chemical warfare means using chemical compounds in war to injure or kill people. The chemicals used for chemical warfare are poisonous. Chemical warfare has been used since the Stone Age. Since 1899, several international laws have said that usin ...

                                               

1925 Geneva Protocol

The Geneva Protocol of 1925 was a law that made it illegal to fight with chemical or biological weapons in war. The Geneva protocol was signed on June 17, 1925 and the protocol was entered into force on January 8, 1928. Before, it was signed by s ...

                                               

Blister agent

A blister agent, or vesicant, is a chemical compound that causes severe pain on the skin, in the eyes, and in the mucus membranes. They can cause severe chemical burns, which then cause painful water blisters, on both the outside and the inside o ...

                                               

Blood agent

A blood agent is a poisonous chemical. A blood agent makes it impossible for a persons blood to hold oxygen and bring it to the rest of the body. Every part of the body needs oxygen to survive. Blood agents can cause life-threatening symptoms lik ...

                                               

CBRNE

CBRNE is an acronym for Chemical, Biological, Radiological, Nuclear, and Explosive materials. These materials are very dangerous, and can hurt many people. When they are used on purpose, CBRNE materials are weapons of mass destruction. However, C ...

                                               

Chemical weapons in World War I

Chemical weapons were a major part of World War I. It was the first time that chemical weapons were widely used in warfare. The gas was very harmful to both sides because the gas would often blow back into the attackers front lines. For this reas ...

                                               

Chloroacetic acid

Chloroacetic acid is an organochloride which results from replacing one hydrogen atom of acetic acid with one chlorine atom. Chloroacetic acid is used in industrial chemical processes, for example in the production of dyes. It was used as poison ...

                                               

Choking agent

A choking agent, also called a pulmonary agent, is a type of chemical weapon. Choking agents make fluid build up in the lungs, and can cause suffocation. The most common examples of choking agents are chlorine and phosgene. There are others, but ...

                                               

Mustard gas

Mustard gas or sulfur mustard is a chemical compound which has been used as a chemical weapon. It was used in World War I by the German Army against British and Canadian soldiers near Ypres, Belgium, in 1917. Later it was also used against the Fr ...

                                               

Phosgene oxime

Phosgene oxime, also called dichloroformoxime or CX, is a chemical weapon, and a nettle agent that damages skin and other body parts. It was first made in the year 1929. When it is solid, it has no color. When it is liquid, it is yellow-brown. It ...

                                               

Zyklon B

Zyklon B was the trade name of a pesticide invented in Germany in the early 1920s. It contains hydrogen cyanide as well as other chemicals. The product was used in Nazi Germany in gas chambers to kill Jews as part of the Holocaust, such as at Aus ...

                                               

Ammunition

Ammunition, often called ammo, comes from the French word la munition. At first it meant all items used for war. This was from the Latin word munire. It now is used only for bullets and other projectiles that are thrown at the enemy by guns, and ...

                                               

Bomb

A bomb is an explosive device that makes and lets out its energy very quickly. This detonation makes a big shock wave. Bombs have been used for centuries. Some bombs also throw out dangerous metal fragments, and some are firebombs. Most bombs do ...

                                               

Explosion protection

Explosion protection is meant to protect buildings and other civil engineering objects against internal and external explosions. It was widely believed until recently that a building subject to an explosive attack had a chance to remain standing ...

                                               

Fuze

In military munitions, a fuze is the part of an explosive device that makes it explode. In some devices a fuze may be identified by function as the "exploder". The term fuze is used to indicate an advanced ignition device with mechanical and/or e ...

                                               

Hand grenade

A hand grenade is a small explosive device that is thrown at a target. It can be used as a weapon against an enemy soldier or vehicle. The most common type of grenade is the fragmentation grenade. Fragmentation grenades send out lots of very fast ...

                                               

Land mine

A land mine is an explosive weapon that is put on the ground or just underneath the ground so that it explodes when a person or vehicle goes by. They are called "mines" because people who put them there dig a hole in the ground. Many people can b ...

                                               

Naval mine

A naval mine is a bomb placed in water to destroy ships or submarines. Unlike depth charges, mines are put in the water and left to wait until they make contact with a ship. Naval mines can be used offensively, to make it harder for enemy ships t ...

                                               

Nitroglycerin

Nitroglycerin, also known as nitroglycerine, trinitroglycerin, trinitroglycerine, 1.2.3-trinitroxypropane and glyceryl trinitrate, is a heavy, colorless, oily, explosive liquid obtained by nitrating glycerol. It is very dangerous and easy to deto ...

                                               

Pipe bomb

A Pipe bomb is a kind of explosive bomb. It is made from a pipe filled with an explosive material. In many countries making or having a pipe bomb is a serious crime.

                                               

Rocket-propelled grenade

"RPG" redirects here, for the gaming genre, see role-playing game. A rocket-propelled grenade or an RPG is the name for any kind of weapon, held on the shoulder that fires rockets that have an explosive warhead. These warheads are attached to a r ...

                                               

Trinitrotoluene

TNT is a powerful, shattering nitroaromatic explosive, somewhat similar to dynamite. Sometimes TNT is used to mean dynamite, or dynamite is used to mean TNT, because they can both be used in similar ways; however the two materials are distinct, d ...

                                               

V-1 flying bomb

The V-1 flying bomb was a World War II weapon. It was a flying bomb, an early cruise missile. Its jet engine made it travel at 350 mph. The Luftwaffe people who controlled it pointed it at London, UK and Antwerp in Belgium. V-1s destroyed nearly ...

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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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