Jun 10, 2018· Also, iron may be galvanised, i.e., plated with zinc, the layer of zinc helping to prevent the iron from corroding. 4.5 E.m.f. and internal resistance of a cell The electromotive force e.m.f., E, of a cell is the p.d. between its terminals when it is not connected to a load i.e. the cell is on no load.
The economy of Italy is the third largest national economy in the European Union, the eighth largest by nominal GDP in the world, and the 12th largest by GDP PPP.Italy is a founding member of the European Union, the Eurozone, the OECD, the G7 and the G20 it is the tenth largest exporter in the world, with $632 billion exported in 2019.Its closest trade ties are with the other countries of
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Copper is a chemical element with the symbol Cu from Latin: cuprum and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.A freshly exposed surface of pure copper has a pinkish orange color.Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling
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Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery grey metal in the actinide series of the periodic table.A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.Uranium is weakly radioactive because all isotopes of uranium are unstable the half lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years.