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The air is heated by the coal fire. This causes the air to expand as the molecules move further apart. As a result the air becomes less dense. The less dense air rises. The cooler air from outside the chi...

When answering this A Level essay question, it is important not to analyse women as a single homogenous group. Factors such as race, socio-economic position, and family structure should be taken into acco...

Notice we have two different equations but that 'x' and 'y' take the same value in both equation a and equation b. In order how to work out what values they take we need to combine the two different equat...

Covalent molecules such as oxygen and ozone absorb different ranges of UV light mainly due to differences in the types of bonds that make up their structure. It is therefore useful to first consider the L...

Priestly explores the theme of social responsibility through the actions of the characters in the play. Through Sheila, the Inspector, and Mr and Mrs Birling, Priestly suggests that everyone has a coll...