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.
Welcome to the world of classical music instruments! Musical instruments are grouped into different families based on the way the instrument makes its sound. There are four main families of instruments: strings, woodwinds, brass, and percussion. Here is how an orchestra is often set up: Below you will find some basic information about each of the main types of instruments used most frequently in a full-sized orchestra: The Strings. The four most commonly used instruments in the string family are the violin, the viola, the cello and the double (string) bass.