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Find the integral of 4/(1-x^2) dx:

The first thing to notice here is that the denominator of the integrand is a case of 'difference of two squares'. The integral, which I will call I, can be rewritten as the integral of 4/((1+x)(1-x)) dx. If ...
JP
Answered by Jemima P. • Maths tutor
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What is covalent character, how does it arise. List a compound it does affect and explain the resulting properties covalent character affects.

Covalent character occurs in ionic bonds when the postive (usually metal) ion is highly charge dense and can polarise the counter ion causing electrons to be shared between the two ions rather than electrons...
JV
Answered by Jake V. • Chemistry tutor
31421 Views

How would I answer a passage question?

Passage questions appear really tricky from the outset, because you don't know what section of your text you might have to read and what may come up. Luckily, however, these questions actually give you a rea...
TD
11957 Views

The critical angle for a glass is 41 degrees. Calculate its refractive index.

Firstly we must remind ourselves of what is meant by critical angle. The critical angle is the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense med...
MS
Answered by Marnie S. • Physics tutor
17625 Views

Describe the differences between DNA and RNA?

DNA is: - double stranded- has thymine as a base- longer RNA is:- single stranded- has uracil as a base (instead of thymine)- shorter
MM
Answered by Muhammed M. • Biology tutor
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