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What do the inventors for fire escape and the bullet proof vest have in common?
The answer you're looking for is, they were both invented by women, however, Stephanie Kwolek, a scientist, didn't actually invent "the bullet proof vest," but instead, she invented Kevlar, a material used in bullet proof vests.
How does a handgun work?
There are several different types of handguns.Single-Shot Pistol - pre-1840's design. Single ShotEarly guns were single-shot pistols that were loaded from the muzzle end. Black powder was poured into the barrel and the bullet forced on top of the powder. A Flintlock pistol was fired using a hammer that held a flint rock that fell against a Frizzen that created sparks. The hammer would force the frizzen away to expose the powder to the sparks. Revolver PistolThe Revolver was designed to allow the user to load 6 shots or more. The gun operates by rotating the cylinder containing the loaded rounds in individual Chambers. By pulling back the hammer (i.e. cocking the gun), the hammer moves a ratchet that rotates the Cylinder to a unfired chamber. This mechanism was copied from the windless of a ship. The gun is fired by pulling the trigger, thus releasing the hammer, allowing it to fall on the chamber to fire the bullet. Automatic PistolVery complicated mechanism. The gun has a slide mechanism that is pulled back and picks up a new bullet from the magazine in the grip of the gun. When the slide returned, it would cock the gun so that it would fire when the trigger is pulled.
How you build a fire detecter?
Actually they are smoke detectors, they detect the result of the fire, smoke. A smoke detector works as follows: There is a chamber with a small nuclear source in it. Smoke particles are hit by the radiation and are ionized, ie, an electron is knocked off the particle leaving the particle with a charge on it. The chamber has two parallel plates in it with a voltage across the plates. The ionized particles are attracted to one of the plates, causing an electric current to flow. This current is amplified and detected and sets off the alarm.
What is a water leg in a boiler?
It is the small space between two plates having water and at the other side of the plate hot gases are available to transfer heat to the boiler water. In fire tube boiler space between end plate and combustion chamber's end plate is called water leg.
What is FM 200 system clean agent fire subression system fire fighting system?
It is a Clean fire agent gas based system to extinguish the fire & it is a combination of fire inhibitors & cooling..
