I'm not sure what you mean. If you meant do they play background music with the orchestra, then yes. You may not be able to hear violas that often because they usually don't have the melody but you might hear them and not even know it.
How often should you change water pump in a boat
No, the frost will not harm violas. They will not bloom in the winter but they will survive the frost.
There can be any number of violas in an orchestra. It most commonly depends on the conductor.
A full orchestra generally uses 12 violas.
with water
you water them every hour
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In most typical middle school and high school orchestras, the violas sit near the middle, in between the cellos and the 2nd violins. It goes like this: 2nd violins Violas 1st violins Cellos
viola tricolor
The plural is violas.
The Portuguese Water Dogs should be groomed about once a month.