They are both Sharp (#) and Flat (b).
For instance A "C" sharp is the same note as a "D" flat.
Which note is used in the written music is depending on the key in which they are being played in.
When writing music, you try to use each letter ("ABCDEFG") only once for the key you are in. This is to keep each note on it's own separate line or space on the music staff.
So lets say you are playing F major (F G A Bb C D E F). You would use Bb instead of A# so that the "A" would not be used twice.
However, in a B major scale (B C# D# E F# G# A# B), you would use A#. In that case, the A# is the same note as the Bb, but in music notation, they will be different notes so that each note is only used once.
Hope this helps.
Look on this picture http://musicianinyou.com/resources/Piano%20Keys.GIF
A sharp on the piano could be black notes or white ones. A sharp is note that is half a step above the natural note. A natural note is any of the white notes on your piano. For example if you played the G key on your piano you would be playing G natural. If you played the white note on the right of G you would be playing A. If you played the black note on the right of G in between G and A you would be playing G sharp or A flat. Hope that answers your question a sharp is half a step above a note and any of the black notes on the piano are one notes sharp and another notes flat. for example, E sharp would be F natural, a white key.
If you look at the black keys they are grouped in 2's and 3's. Now look at the group of 3. F-sharp is the black key in the group of 3 that is farthest left.
G Sharp
The black key directly to the right of G is G-sharp/A-flat.
Look on this picture http://musicianinyou.com/resources/Piano%20Keys.GIF
Yes, A flat is the same black key as G sharp on the piano. It is the middle black key in the three black key groups.
A sharp on the piano could be black notes or white ones. A sharp is note that is half a step above the natural note. A natural note is any of the white notes on your piano. For example if you played the G key on your piano you would be playing G natural. If you played the white note on the right of G you would be playing A. If you played the black note on the right of G in between G and A you would be playing G sharp or A flat. Hope that answers your question a sharp is half a step above a note and any of the black notes on the piano are one notes sharp and another notes flat. for example, E sharp would be F natural, a white key.
If you look at the black keys they are grouped in 2's and 3's. Now look at the group of 3. F-sharp is the black key in the group of 3 that is farthest left.
G Sharp
The black key directly to the right of G is G-sharp/A-flat.
To the left, G natural. To the right, A natural (on a piano keyboard).
Sharp.
The G flat key is the black key left to G and right to F on the keyboard.
It would be the key of G. Tubas are C instruments, like a piano.
If you mean a common f sharp triad on a piano, then they would be F sharp, A Sharp, and C sharp, any combination of the three. The notes of the diatonic F sharp scale are F sharp, G sharp, A sharp, B, C sharp, D sharp and E sharp
No. It is the black key between G and A. It is also called A flat.