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How do I write about the background of a source?

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 understand i...
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Answered by Ellen L. • History tutor
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How do Headlands and Bays form on a coastline?

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 lithology of the coastline ...
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Answered by Ella W. • Geography tutor
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How do I answer 'To what extent' questions?

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 is...
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Answered by Ellen L. • History tutor
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3x^3 -2x^2-147x+98=(ax-c)(bx+d)(bx-d). Find a, b, c, d if a, b, c, d are positive integers

(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. T...
LK
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Calculate pH of 0.1M NaOH

pH=14-pOHpOH=-log([OH(-)])NaOH-> Na(+)+OH(-)[NaOH]=[OH(-)]=0.1MpOH=-log(0.1)=1pH=14-1=13
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Answered by Laura K. • Chemistry tutor
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