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Molecules of propanol have a hydrogen directly bonded to a NOF atom (oxygen in this case), which means that they can hydrogen bond with eachother. The oxygen in the other three molecules is only bonded to...

Between 1898 and 1991 American foreign policy encountered three major turning points: The moveto imperialism and global expansion beginning in 1898; the inward turn to isolationism following thefinancial ...

The derivative of a function in a point is, by definition, the slope of the tangent line to the function in that point. In a point that is a maximum or a minimum, one can easily picture that the tangent i...

Descartes argues that there is a fundamental essential difference mind and body. The mind is characterized as a res cogitans: it is that which thinks, its characteristic action is thought, it has no exten...

In Spanish there are no proper modal verbs, but we use what we call 'perífrasis verbales modales'. These are constructions involving an auxiliary verb conjugated and a main verb in a non-conjugated form (...