I assume you mean a chord. You can do this by placing fingers on both strings that you want to play and playing the strings at the same time.
A violin is not a note. It is an instrument.
2 fingers on A
2 Beats
It could mean many things. F is also a letter place holder for a note on the violin. Ex: F can be 2 on D.
ffgaagfeddefeeeffgaagfadefedee
e
Yes, you can play the note C on the E string of a violin.
violin
The longer the string the lower the note it produces
The note A-natural sounds different on a tuning fork, a violin, and a flute because of the relative amplitudes of harmonics.
the note becomes lower
Im guessing you mean Open A?