Search over 10,000 free study notes

Electrons are bound to a nucleus in quantised energy levels. As they gain and lose energy they transition between this energy levels by emitting photons. Emitted photons have energies equal to the change ...

Firstly, it would be useful to look at some key definitions. An import tariff is a fee paid to bring goods from abroad into a country and be sold. Therefore, a rise in Chinese import tariffs raises the pr...

The pancreas responds by releasing insulin. This causes glucose to move into the cells.

Shivering involves rapid contracting and relaxing of the muscles. This requires energy and so the muscle cells respire in order to release this energy in the form of heat.

The success of the Arab Conquests can be easily broken down into two factors: the strengths of Islam and the weaknesses of their enemies. This can be seen in the worn down attitudes of the Byzantine and S...