The 'flat' is a half step below the note; similarly the 'sharp' is a half step above the note. The scale is made of 7 notes, 5 of which are separated from the next by whole steps, while two have only...
Chord. See related answers.
If one point is A(x1,y1) and other point is B(x2,y2) then the slop of line between these point, m=(y2-y1)/(x2-x1)
a staff!
..is a half note when, in the time signature, the quarter note = 1 beat (any time signature/4). In any time/8, it would be a quarter note. Etc, etc...
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