It is called a post script or ps.
Four crotchets added together equals one semibreve (whole note). The amount of beats it carries depends on the time signature.
It really depends on your time signature (that is what defines a beat as). In terms of the most common time signature 4/4, the note that has a rhythmic value of three beats is called a dotted half note.
quarter note
This time signature provides four 16th notes (semiquavers) in a measure. That is itself one quarter note from value.
A whole note if we're talking 4/4 time signature
post script is an ore added after the signature in letter
"PS" stands for postscript, a note added to the end of a letter after the signature. It is used to include an additional thought or information that was forgotten or deemed important to mention after the main body of the letter.
A Two rupees note bears a signature of Governor
Writers typically note the inclusion of enclosures at the end of a letter by typing "Enclosure" or "Enclosures" followed by the number of items included in brackets. For example, "Enclosures: (2)" would indicate that two additional items are included with the letter.
the signature of a letter is called the complimentary close or ending
The letter "C" in a music time signature signifies common time, which is equivalent to 4/4 time. This means there are four beats in a measure and the quarter note receives one beat.
The letter "C" in a time signature signifies common time, which is another way of saying 4/4 time. This means there are four beats in a measure and the quarter note receives one beat.
Four crotchets added together equals one semibreve (whole note). The amount of beats it carries depends on the time signature.
PS stands for "postscript," which is an additional note added at the end of a letter after the signature. It is used to include information that was forgotten or to emphasize a point made in the main body of the letter.
In a 6/8 time signature, the dotted quarter note gets the beat.
The key signature that includes the note E sharp is the key of F sharp major.
It depends what the time signature is; if the time signature is 4/4 then a note worth half a beat would be an eighth-note. If the time signature is in say 6/8, then half a beat would be a sixteenth-note. Usually music is in quarter beats, so most probably an eighth-note for you.