A major second up from C major is D major. In Music Theory, a major second interval consists of two half steps, so moving from C to D encompasses these two half steps. D major is the second scale degree in the C major scale.
The 2nd in C major is D.
F
Major C and the Major C
C major: C D E F G A B C C minor: C D Eb F G Ab Bb C
The second octave of the G major scale on the trombone begins on the note G in the second octave (G4) and continues through the scale: A, B, C, D, E, F#, and G (G5). The positions for these notes typically are: G (1st position), A (6th position), B (4th position), C (3rd position), D (1st position), E (2nd position), and F# (4th position). This octave provides a brighter and higher range compared to the first octave.
The 2nd in C major is D.
B flat
A minor second.
You can have a musical scale starting anywhere you like. On the piano, the simplest scale is C major, in which the second note is D. In all major and minor scales, you can find the second note by moving up two semitones from the first note (C-C#-D or G-G#-A)
D natural
The supertonic of any scale is the second degree of the scale. Therefore, the supertonic of C major is D.
G major transposed down a major second becomes F major. In the G major scale, the notes are G, A, B, C, D, E, and F#. When you lower each note by a whole step (major second), the resulting scale is F, G, A, Bb, C, D, and E.
F
To transpose from A major to C major, you need to shift each note up by a minor third interval, as C major is three half steps higher than A major. In A major, the notes are A, B, C#, D, E, F#, G#, and they become C, D, E, F, G, A, B in C major. Essentially, you can take each chord or melody in A major and move it up to the corresponding notes in C major to achieve the transposition.
The interval between C and D is a major second or a "whole step".
C major
C major