Pressure is force over area. So assuming your cube is at rest and on earth, then the force is mass x gravity and the pressure is mass x gravity / area.
A string quartet is made up of four musicians playing two violins, a viola, and a cello. These are all string instruments played either by plucking the strings or using a bow. The violins are the smallest and typically play the higher notes. The viola and cello are larger instruments and play the lower notes.
Clarinet Quintet in A Major, K 581. Ludwig van Beethoven. Quintet, a musical composition for five instruments or voices; also, a group of five musicians performing such a composition. The string quintet normally includes two violins, two violas, and a cello.