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This question is to test integration by parts.  First let u=x² and u'=2x as a result, and v'=e^x and so v=e^x too. Then use the by parts formula to express the integral as x...

The reagents needed are sulphuric acid and nitric acid. It may be useful to notice that nitric acid here acts as a stoichiometric reagent, in that it is used up in the reaction to nitrate the toluene, but...

Fuel rods provide fissionable elements such as uranium - 235 , The uranium abosrbs a neutron at thermal speeds (  energy transefered to the moderator) from previous reactions. This then enables the Uraniu...

Wagner’s Tristan und Isolde is one of the most significant works of the 19th century. It is particularly notable for a radical approach to melody and harmony. The appropriately named ‘prelude’, not ‘overt...

Bivalves - Firstly they have two identical valves make up the main shell. They also grow from a few mm to 1m in size such as the giant clam. In order to close the valves, a pair of adductor muscles contra...