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.
Piano Woodwinds Percussion Brass Began to use instruments with valves- gave a wider range and versatility. Most commonly used brass instruments were trumpets, horns, trombones and tubas. String No new instruments were used in the Romantic Period, all the same from the Classical and Baroque. but string instruments seemed to play a bigger role in balancing out the larger brass and woodwind sections in the orchestra.