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The wood pencil has been used for writing by the Soviet space programs from the start. It is simple with no moving parts, except for the sharpener. The mechanical pencil was used by NASA during Project Mercury, [11] and it remained one of the most used writing instrument up through the Gemini, Apollo, and Skylab programs. [12]
Reginald Tate, who had played the title role in The Quatermass Experiment, collapsed and died on 23 August 1955, aged 58. [4] This was less than a month before the shooting of the location filming for Quatermass II began, and necessitated the casting of a replacement lead actor at short notice; John Robinson was chosen to fill the part. [5]
A Cartesian diver or Cartesian devil is a classic science experiment which demonstrates the principle of buoyancy (Archimedes' principle) and the ideal gas law.The first written description of this device is provided by Raffaello Magiotti, in his book Renitenza certissima dell'acqua alla compressione (Very firm resistance of water to compression) published in 1648.
Inspired by Pavlov's experiment, Jim trains Dwight to expect an Altoid at the sound of a computer log-in bell. After weeks of conditioning, Jim boots his computer, and Dwight immediately extends ...
In aerodynamic levitation, the levitation is achieved by floating the object on a stream of gas, either produced by the object or acting on the object. For example, a ping pong ball can be levitated with the stream of air from a vacuum cleaner set on "blow" - exploiting the Coandă effect which keeps it stable in the airstream. With enough ...
While this basic idea carried enormous weight and has come to form the basis of understanding why objects float, it is best applied for objects with a characteristic length scale greater than the capillary length. What Archimedes had failed to predict was the influence of surface tension and its impact at small length scales.