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.
From Haydnâs first quartet to his last, a glorious progression of the composerâs development of the form is remarkably apparent. The model of composition of his Opus 9 quartets became the standard string quartet form. Listen to Hadynâs String Quartet in C Major, Op. 9, No. 1 on YouTube. Generally, the music composed for a string quartet reflects the four movement form of an orchestra: a fast first movement followed by a slow second movement, a dance-like third movement, and a fast forth movement.