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Historical sources are an essential part of studying the past. Though can sometimes be confusing, there are lots of easy ways on how to break them down.The background of a source is essential to understan...

There are a number of ways where coastlines see the formation of headlands and bays but there are a number of factors which must be seen for these to form.

Firstly the geology and litholo...

These questions involve weighing up different components of an event. You may be considering causes, consequences or the level of, for example, opposition. Considering the question is 'to what extent', it...

(bx+d)(bx-d)=b^2x^2-d^2(ax-c)(bx+d)(bx-d)=(ax-c)(b^2x^2-d^2)=ab^2x^3-ad^2x-b^2cx^2+cd^2ab^2=3b^2c=2ad^2=147-cd^2=98From equations:a=3/b^2c=2/b^2d^2=49b^2Since a, b, c, d are positive integers, b must be 1...

pH=14-pOHpOH=-log([OH(-)])NaOH-> Na(+)+OH(-)[NaOH]=[OH(-)]=0.1MpOH=-log(0.1)=1pH=14-1=13