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GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.
Galápagos is a three-part BBC nature documentary series exploring the natural history of the Galápagos Islands and their important role in the formation of Charles Darwin's theory of evolution. It was first transmitted in the UK on BBC Two in September 2006.
Van der Waals forces are often among the weakest chemical forces. For example, the pairwise attractive van der Waals interaction energy between H ( hydrogen ) atoms in different H 2 molecules equals 0.06 kJ/mol (0.6 meV) and the pairwise attractive interaction energy between O ( oxygen ) atoms in different O 2 molecules equals 0.44 kJ/mol (4.6 ...
Capillary action of water (polar) compared to mercury (non-polar), in each case with respect to a polar surface such as glass (≡Si–OH). Capillary action (sometimes called capillarity, capillary motion, capillary rise, capillary effect, or wicking) is the process of a liquid flowing in a narrow space without the assistance of external forces like gravity.
Newsround (stylised as newsround) is a BBC children's news programme, which has run continuously since 4 April 1972. It was one of the world's first television news magazines aimed specifically at children. Initially commissioned as a short series by BBC Children's Department, who held editorial control, its facilities were provided by BBC News.
Rise of the Nazis is a British documentary series about the rise and fall of Adolf Hitler and the Nazi Party.The first series aired in 2019, followed by the second and third series in 2022, and the fourth series in 2023. [1]
A static equilibrium between two forces is the most usual way of measuring forces, using simple devices such as weighing scales and spring balances. For example, an object suspended on a vertical spring scale experiences the force of gravity acting on the object balanced by a force applied by the "spring reaction force", which equals the object ...
When more than two forces are involved, the geometry is no longer a parallelogram, but the same principles apply to a polygon of forces. The resultant force due to the application of a number of forces can be found geometrically by drawing arrows for each force. The parallelogram of forces is a graphical manifestation of the addition of vectors.