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Die Glocke (German: [diː ˈɡlɔkə], 'The Bell') was a purported top-secret scientific technological device, wonder weapon, or Wunderwaffe developed in the 1940s in Nazi Germany. Rumors of this device have persisted for decades after WW2 and were used as a plot trope in the fiction novel Lightning by Dean Koontz (1988).
Experiments in 1659 by Robert Boyle of the Royal Society were made using a barometer underwater, and led to Boyle's law. [1] The French physicist, mathematician and inventor Denis Papin published Recuiel de diverses Pieces touchant quelques novelles Machines in 1695, where he proposed a depth gauge for a submarine. [2]
Bell expanded on the theorem to provide what would become the conceptual foundation of the Bell test experiments. [ citation needed ] A typical experiment involves the observation of particles, often photons, in an apparatus designed to produce entangled pairs and allow for the measurement of some characteristic of each, such as their spin .
The Bell numbers are named after Eric Temple Bell, who wrote about them in 1938, following up a 1934 paper in which he studied the Bell polynomials. [ 27 ] [ 28 ] Bell did not claim to have discovered these numbers; in his 1938 paper, he wrote that the Bell numbers "have been frequently investigated" and "have been rediscovered many times".
Bell's spaceship paradox is a thought experiment in special relativity. It was first described by E. Dewan and M. Beran in 1959 [ 1 ] but became more widely known after John Stewart Bell elaborated the idea further in 1976. [ 2 ]
The Kremlin Clock on the Moscow Kremlin rings in 2012.. The most basic sort of striking clock simply sounds a bell once every hour; this is called a passing strike clock. . Passing strike was simple to implement mechanically; all that must be done is to attach a cam to a shaft that rotates once per hour; the cam raises and then lets a hammer fall that strikes t
A bell that is up is dangerous to be near, and only expert ringers should ever contemplate entering a bell chamber or touching a rope when the bells are up. To raise a bell, the ringer pulls on the rope and starts the bell swinging. Each time the bell swings the ringer adds a little more energy to the system, similar to pushing a child's swing.
The phenomenon is named after the Scottish anatomist, surgeon, and physiologist Charles Bell. Bell's phenomenon is a normal defense reflex present in about 75% of the population, resulting in elevation of the globes when blinking or when threatened (e.g. when an attempt is made to touch a patient's cornea).