Can you explain how piano notes are produced and how they are represented on sheet music?

Piano notes are produced when a key is pressed, causing a hammer to strike a string inside the piano, creating a sound. On sheet music, each note is represented by a symbol placed on a staff with lines and spaces that correspond to different pitches. The position of the note on the staff indicates the pitch, and other symbols like the clef and key signature provide additional information about how the note should be played.