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.
Each family is grouped by the way the instrument produces vibration. This kind of classification gives us the string family, the woodwind family, the brass family and the percussion family. The String Family. When you think of the orchestra, you most likely think of the violin, or at least some sort of string instrument. This is probably because they make up the majority of the instruments in the orchestra, so good thinking! All string instruments use string vibration to produce sound, so it makes sense that they are called the string family! There are four main string instruments. These are the violin, the viola, the cello and the bass.