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A bomb is an explosive device, usually some kind of container filled with explosive material, designed to cause destruction when set off. The explosion of the bomb has to be triggered, usually by a clock, a remote control, or some kind of sensor, usually pressure (altitude), radar, or contact. The word comes from the Greek bombos, an onomatopoeic term with approximately the same meaning as "boom" in English.
Bombs are first and foremost weapons; the term "bomb" is not usually applied to explosive devices used for civilian purposes (such as construction or mining). Note that many military explosive devices are not called "bombs". The military mostly calls airdropped, unpowered explosive weapons "bombs," and such bombs are usually the provenance of air forces and naval aviation. Other military explosive devices are called grenades (such as hand grenades), shells, depth charges, missiles or mineMine can refer to a number of things: Mines are tunnels used in mining for extraction of resources. In medieval times, a mine was a tunnel dug under a castle wall to make it collapse. This was known as undermining or sapping''. These tunnels were sometimes.
They have been used for centuries in warfare and are a central part of the terrorist'sTerrorism refers to the use of violence against noncombatants for the purpose of achieving a political, religious or socio-economic goal. Terrorist acts can be carried out by individuals or groups, and are sometimes sponsored by governments as an alternat arsenal. They fall into three distinct categories: conventional (filled with chemical explosives), dispersive (filled with submunition s, chemicals or other disruptive agents which are spread on or shortly before impact) or nuclear (relying on nuclear fissionIn physics, fission is a nuclear process, meaning it occurs in the nucleus of an atom. Fission is when the nucleus splits into two or more smaller nuclei plus some by-products. These by-products include free neutrons and photons (usually gamma rays). or nuclear fusionIn physics, nuclear fusion (a thermonuclear reaction is a process in which two nuclei join, forming a larger nucleus and releasing energy. Nuclear fusion is the energy source which causes stars to shine, and hydrogen bombs to explode. It takes considerabl for their effect).
A distinction is commonly drawn between terrorist and military bombs. The latter are almost always mass-produced weapons, developed and constructed to a standard design out of standard components and intended to be deployed in a standard way each time. By contrast, terrorist bombs are usually custom-made, developed to any number of designs, use a wide range of explosives of varying levels of power and chemical stability, and are used in many different ways. For this reason, they are generally referred to as improvised explosive deviceExplosive devices as used by terrorists, guerrillas or commando forces, are formally known as Improvised Explosive Devices or IEDs . An IED is a device placed or fabricated in an improvised manner incorporating destructive, lethal, noxious, pyrotechnic, os or IEDs.
The most powerful bomb in existence is the hydrogen bomb, a nuclear weaponmushroom cloud of the atomic bombing of Nagasaki, Japan, in 1945 lifted nuclear fallout some 60,000 feet (18 km) above the epicenter. A nuclear weapon is a weapon that derives its energy from nuclear reactions and has enormous destructive power a single n. The most powerful non-nuclear bomb is the United States Air Force's MOAB (Massive Ordnance Air Burst).