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JS Bach's role in the development of Equal Temprament was vital. Equal Temprament is a type of tuning, which over time has become standardised on almost all instruments in Western Classical Music. Inst...

ER, IR and AR are the three different endings of Spanish verbs. IR and ER verbs are conjugated in a similar way, and AR verbs in a different way in the present tense. 

With all regular ve...

The hypothalamus in the brain controls the body temperature.

If the temperature gets too high:
receptors in the hypothalamus detect the change.
the heat loss ...

Energy will be lost due to the plastic deformation of the mass as the bullet enters the mass. However momentum will always be conserved, so you can use this to find the speed of the mass when the bulle...

Like with many questions in the PAT test once you know what to do it is quite easy! To solve you can use a difference of two squares i.e. (2007-2006)(2007+2006). As the first bracket gives 1 and the se...