USAGE The wordsprincipleandprincipalare pronounced in the same way but they do not have the same meaning.Principleis normally used as a noun meaning ¡®a fundamental basis of a system of thought or belief¡¯, as inthis is one of the basicprinciplesof democracy.Principal, on the other hand, is normally an adjective meaning ¡...
This article aims to raise awareness of the potential challenges involved in sending (autonomous) robots to war. Drawing on multiple disciplines, the author finds that the advantages and disadvantages of using robotic soldiers may well allow one to argue
Steam Distillation is a separation process for temperature-sensitive substances. It is a particular type of distillation. Another way around is a method for separating miscible liquid bases depending upon their volatilities. For instance aromatic compounds. It plays a vital role in some industrial regi...
The basic cell or voltaic cell is made up of two electrodes, one of copper and the other of zinc dipped in a glass vessel solution of dilute sulfuric acid. The current flows from copper to zinc outside the cell and from zinc to copper inside the cell when the two electrodes are connect...
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A photodiode is subjected to photons in the form of light which affects the generation of electron-hole pairs. If the energy of the falling photons (hv) is greater than the energy gap (Eg) of the semiconductor material, electron-hole pairs are created near the depletion region of the diode...
Electrons can be ejected from matter when light falls on it, whether it’s a single atom or a sheet of metal. This is true if the light has enough energy to overcome the material’s so-called work function or ionisation threshold in an atom or molecule. H. R. Hertz discovered this ef...