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...simple, why do the sounds made by each instrument in an orchestra or band sound so different? The pitch is the degree of highness or lowness of a musical note. The pitch depends on how rapid the vibrations are i.e. how high the frequency is. A higher pitch has a higher frequency. [low and high pitched waveforms] The diverse sounds made by the instruments in each section...

...code of A, C, G and T letters. FACT: Dogs’ best friend (humans) have 46 chromosomes and their famous enemy (cats) have 38. Despite the difference in numbers, dogs, cats and humans have pretty much the same overall amount of DNA in each cell. Organisms with the largest number of chromosomes: ferns often have over 100 chromosomes, with some having over 1000. Organisms...

...simple to use structured query language (SQL) CREATE TABLE statements to define tables, or to use the facilities of a database tool to define them for you. Once developed, the tables can be manipulated and displayed in many different ways, again using SQL statements, a database tool or an application development tool. However, uncontrolled ad hoc creation of tables by end...

...codes. Update at 10am Aftershocks are continuing. Journalists might like to visit http://www.centrometeoitaliano.it/terremoti-in-tempo-reale-italia-mondo-ingv/ I captured the screen grabs below from there at 0935 BST: [Map showing effect of the Earthquakes] [Map showing effect of the Earthquakes] The biggest aftershocks have been magnitude 4. These were in the two hours...