Estos son archivos de audio o video seleccionados para mostrar en la Página principal como los Multimedia del día. Publicarlos en esta página permite a los usuarios traducir los subtítulos a otros idiomas.
Multimedia del día proporciona un archivo de audio o video con licencia gratuita cada día.
English : Experiment showing direct synthesis of aluminum bromide from the elementary substances. The reaction is very vigorous and can be presented by the equation: 2Al(s) + 3Br2(l) = Al2Br6(Br2).
The product, as indicated by the equation, is dissolved in the excess bromine.
English : Due to the fact that the orange peel or the peel of other citrus fruit is squeezed over a flame, it is allowed for the juices from the peel to come in contact with the flame; then, the essential oils ignite and burn.
English : One of the big mysteries in astronomy is how Hubble Space Telescope. They give us a unique insight into how galaxies collide to form larger galaxies.
English : Female banana farmers in northern Malawi have found a creative solution to combat the impacts of climate change, which have recently devastated their crops. They are making wine from overripe bananas that go bad because of extreme conditions.
English : An experiment showing burning of sulfur in oxygen. A flow-chamber joined to gas washing-bottle (filled with solution of methyl orange) is being used. The product is sulfur dioxide (SO2) with some traces of sulfur trioxide (SO3). The 'smoke' that exits the gas-washing bottle is, in fact, a sulfuric acid fog generated in a reaction represented by:
SO3(g) + H2O(l) = H2SO4(aq).
The oxides are acidic, as can be witnessed by the colour change of the indicator.
English : Meteorologists roughly divide Vietnam into three climate zones. The subtropical north, the tropical south and the weather divide at the Hai Vân Pass. Video redubbed using AI. [de][es][vi].
English : The craft of the Oberberg paving stone cutters. In a quarry in Erlenhagen/Gummersbach, the paving stone cutters break the blocks out of the rock and cut them to size according to their intended use, protected from wind and weather only by roof-like huts.
English : A video of a galaxy forming in an astrophysical simulation. Since our Universe moves too slowly to watch, faster-moving computer simulations are created to help find out. This video from the IllustrisTNG simulations tracks gas from the early universe until today. As the simulation begins, ambient gas falls into and accumulates in a region of relatively high gravity. After a few billion years, a well-defined center materializes from a strange and fascinating cosmic dance. Gas blobs – some representing small satellite galaxies – continue to fall into and become absorbed by the rotating galaxy as the present epoch is reached and the video ends.
English : Aboard the ISS, expedition 31 flight engineers of NASA and ESA grappled and berthed the SpaceX Dragon spacecraft to the station's Harmony module May 25, 2012.
