In Dido and Aeneas, Dido sang a Lament that showed her grief…

In Dido and Aeneas, Dido sang a Lament that showed her grief about losing Aeneas.  Her grief was represented by a repeated descending pattern throughout the aria.  This is an example of which Baroque concept, which explains how to write specific emotions in music?

The maxillary premolars have a buccal cusp that is almost th…

The maxillary premolars have a buccal cusp that is almost the same height as the lingual cusp. The occlusal surface has numerous short grooves that connect to the central grooe; there are no obvious proximal marginal developmental grooves or depression. Which is premolr is this?