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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...

Firstly, I would go through each stage of the sentence with the student. They must write each verb, noun or pronoun in the correct case and tense with the correct endings. At each step I would expect not ...

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...

Auxins are degraded within the tips of the shoots of the plant exposed to sunlight, and gather on the shaded side of the shoots. Gathered auxins enourage cell elongation, and the shoot to grow upwards, to...