magnetic$46228$ - traduction vers grec
![HP-41-series]] (from 1979) could store data via an external magnetic tape storage device on [[microcassette]]s](https://commons.wikimedia.org/wiki/Special:FilePath/Digital cassette drive HP82161A connected to calculator HP-41CX.jpg?width=200 "HP-41-series]] (from 1979) could store data via an external magnetic tape storage device on [[microcassette]]s")
![A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit](https://commons.wikimedia.org/wiki/Special:FilePath/Ferrite core memory.jpg?width=200 "A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit")
![[[Project Whirlwind]] core memory](https://commons.wikimedia.org/wiki/Special:FilePath/Project Whirlwind - core memory, circa 1951 - detail 1.JPG?width=200 "[[Project Whirlwind]] core memory")
![Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high ("1") or low ("0") depending on original magnetization state of the core.](https://commons.wikimedia.org/wiki/Special:FilePath/Ringkernspeicher hysteresekurven.agr.svg?width=200 "Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high (\"1\") or low (\"0\") depending on original magnetization state of the core.")
![This [[microSDHC]] card holds 8 billion bytes (8 GB). It rests on a section of magnetic-core memory that uses 64 cores to hold eight bytes. The microSDHC card holds over one billion times more bytes in much less physical space.](https://commons.wikimedia.org/wiki/Special:FilePath/8 bytes vs. 8Gbytes.jpg?width=200 "This [[microSDHC]] card holds 8 billion bytes (8 GB). It rests on a section of magnetic-core memory that uses 64 cores to hold eight bytes. The microSDHC card holds over one billion times more bytes in much less physical space.")
![US quarter]] for scale](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetic-core memory, 18x24 bits.jpg?width=200 "US quarter]] for scale")
Définition
Wikipédia
Magnetic pistol is the term for the device on a torpedo or naval mine that detects its target by its magnetic field, and triggers the fuse for detonation. A device to detonate a torpedo or mine on contact with a ship or submarine is known as a contact pistol.
A magnetic pistol on a mine will allow the mine to detonate in proximity to a target, rather than actual contact, allowing the mine to cover a larger effective area.
A magnetic pistol on a torpedo allows the torpedo to detonate underneath the ship, instead of upon impact with the side of the ship. As an explosion underneath a ship is contained between water and the ship, far more damage will result to the ship. The explosion will lift the ship out of the water and may break the keel of the ship, splitting it in two. Any hole created by the explosion will be on the bottom, causing more flooding.
A contact pistol on a torpedo will require the torpedo to strike the side of the ship. Any hole created by the explosion will be closer towards the waterline, reducing flooding. The explosion will also dissipate into the air, reducing the damage. If the torpedo is fired too deep, the torpedo will not hit the ship. If the ship has a round or sloping bottom, the torpedo may glance off the bottom and not detonate.
