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The SA node initiates an impulse which travels across the atria causing them to contract and blood is forced actively into the ventricles. This is called atrial systole. The AV node then delays the impuls...

The Electoral College is not the best method because campaigns focus on swing states, demonstrated by the fact that in the 2012 Presidential Election, 38 states were not visited a single time. This may ca...

This question tests fundamental understanding of integration and checks that the student is not simply memorizing the simple examples for the test. Most students will remember that the integral of 1/x is ...

Isostatic sea level change refers to a change in the level of the land relative to the sea, and it is a localised change. The two main causes are isostatic rebound - the slow rise of areas that were once ...

"Birdsong" and birds themselves are used as a central motif, throughout the novel. This is first highlighted by Stephen’s phobia of birds. The horror for Stephen of the flapping birds wings is d...