Top answers


How do I rationalise the denominator of a fraction which consists of surds?

[ Recall: the numerator of a fraction is the top number; the denominator refers to the bottom number. A surd is an irrational number, e.g. √3, √5, etc.]Given the following fraction:(a+√b)/(c-√b), where a,b a...
LD
Answered by Liam D. • Maths tutor
10748 Views

How can I write a great conclusion to an English essay?

At any level, the conclusion to an English essay should not be merely a bland summary of the content already explored . It may be a good idea to summarise the main points that have led to the final discussio...
AP
Answered by Adam P. • English tutor
28712 Views

How do I approximate an irrational square root without using a calculator?

Although this might look like a smart trick at the beginning, the truth is that as a physicist this kind of approximations turn out to be useful very often. This is quite likely to come up in the PAT as well...
SH
Answered by Sergio H. • PAT tutor
6740 Views

Political spectrum

Left wing: - believes the role of the state is to intervene in social and economic policy -believes in the nationalisation of industries -believes people need assistance- for example welfare state and redist...
LB
Answered by Lizzie B. • History tutor
6275 Views

Types of chemical bonds

Ionic bond - this is an electrostatic force of attraction between two oppositely charged ions, i.e. a positively charged ion and a negatively charged ion. Covalent bond - this is a bond where electrons are s...
LB
Answered by Lizzie B. • Chemistry tutor
17402 Views