piano is a common singular noun
There's a little uncertainty here. A piano has strings, which a string instrument would have, but it's struck by hammers, which would also make it a percussion instrument.
K is the Kochel catalogue classification, named after the classifier of Mozart's works.
String instrument is a classification in itself. String instruments include violin, viola, cello, double bass, guitar, harp, etc. Some people put piano under the string classification as well.
The piano itself is an inanimate object and does not possess gender. However, in some languages, musical instruments may be assigned a gender classification based on grammatical rules. In English, the piano is typically referred to as a neutral object, while in languages like French or Spanish, it may be classified as feminine or masculine depending on the specific term used.
le piano I play the piano = Je joue du piano
Piano Jouer du piano - to play piano
piano.
forte,piano,forte,piano,forte,piano,forte,piano,forte,piano,forte
No, "piano" is not plural. "Piano" is the singular form, and "pianos" is the plural form
One can learn more information on piano playing at How to play Piano, Rocket Piano, Piano, Virtual Piano, Button Bass, Youtube, Online Pianist, Multiplayer Piano and many more.
This is difficult to answer because "upright piano" is a standard and well-defined term "Student piano" is not. In 99% of cases, a "student" piano IS an upright piano.
The singular of pianos is piano. As in "the piano is a nice instrument".