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In both writing and speaking assessments, you need to ensure your content has good flow and ticks certain boxes that the examiner is looking for - for example have you used the correct form of the past...

Crude oil is composed of many hydrocarbons. The crude oil is heated to evaporate it and the vapour rises. There is a temperature gradient up the column (hotter at the bottom...

A sprain is a torn ligament occuring around a joint. A common example is a sprained ankle. Where as a strain is a torn muscle or tendon. For example a pulled hamstring.

When you exhale, the intercostal muscles relax. The diaphragm also relaxes and the ribs move inwards and downward. There is a decreased volume of the chest so therefore the pressure increases in the lungs...

Terminal velocity is the constant speed (in a particular direction) a body reaches when the forces are balanced, i.e. acceleration = 0 m s^-2.

An example of...