sharps and flats

Without knowing which lesson you were looking at to tell you exactly what key it is, the sharps and flats after the bass clef tells you which key you are going to be playing.  

3 # is the key signature.  On which lines they are is not significant, they are just drawn there every which way.

If you go up by 5ths from C, G has 1 #, D has 2 and A has 3#.  So your music is in the key of A major.

Here is a table of the keys:
Key        Minor     Signature      1   2   3   4   5   6   7
C  major   A  minor                 C   D   E   F   G   A   B
G  major   E  minor  #              G   A   B   C   D   E   F#
D  major   B  minor  ##             D   E   F#  G   A   B   C#
A  major   F# minor  ###            A   B   C#  D   E   F#  G#
E  major   C# minor  ####           E   F#  G#  A   B   C#  D#
B  major   G# minor  #####          B   C#  D#  E   F#  G#  A#
F# major   D# minor  ######         F#  G#  A#  B   C#  D#  E#  
F  major   D  minor  b              F   G   A   Bb  C   D   E
Bb major   G  minor  bb             Bb  C   D   Eb  F   G   A
Eb major   C  minor  bbb            Eb  F   G   Ab  Bb  C   D
Ab major   F  minor  bbbb           Ab  Bb  C   Db  Eb  F   G
Db major   Bb minor  bbbbb          Db  Eb  F   Gb  Ab  Bb  C
Gb major   Eb minor  bbbbbb         Gb  Ab  Bb  Cb  Db  Eb  F

Thanks, guys! 8)

Much love!  :-*

Hey helgi, I thought the sharps (or flats) were placed on the line that represents the note(s) that are sharpened or flattened in that key?  Feel free to correct me here (theory's not my strongest area ;D),  but I noted that on the sheet music that chasumdeep had the sharps were on the F, C, and G notes being sharpened, which are the three notes that are sharp in G Major.

Do you think that makes sense? ??? :)
Brad

I went and looked it up.

See for example:
http://cnx.rice.edu/content/m10881/latest/

You are absolutely right, they are placed on the line where the note is sharpened.  I had no idea.  I just counted them.

You live and learn.  Thanks.

I have a ?   i have a acustic and i need string but i dont know names of them to get the right one...its the 6th string

It's called a low-E if it's the one closest to the top.  E-A-D-G-B-E / 6 thru 1.  The 1st string is also an E.  I take it you are replacing a broken string, best bet, get a whole new set and if you are not comfortable doing it yourself, find someone to show you so you can learn to restring your guitar and get her back in tune.  Good Luck!

Here is a common set of guitar strings.  Picture this as if you are leaning over and looking at your fretboard:

e .11  skinniest string closest to the floor
G .13
B .18
D .28
A .38
E .49  fattest string closest to your chest

Those are a bit thin for an acoustic.  .013 through .054 are my best guess at standard sizes.