Search over 10,000 free study notes

The Doppler effect is the change in frequency that occurs when a source is moving relative to an observer. If the source moves away from the observer, the wavelength will be increased and therefore the fr...

P wave: atrial depolarisation and subsequent contraction. QRS complex: Ventricular depolarisation and subsequent contraction. Q wave is negative due to left to right depolarisation of ventricular septum. ...

A series of compounds with the same functional group, having similar chemcial properties and reactions.

Firstly, the alveoli walls consist of a one-cell thick layer of squamous epithelium. This means there is a thin barrier to diffusion, and a small distance for oxygen molecules to diffuse across to get to ...

When writing an introduction, being concise and precise is key. Your introduction should contain no more than a couple of sentences, depending on the length of your essay. It should provide a very general...