1 However, should there be need to buy the complete compressor, that would cost around $600 to $1,000. 2  Used and rebuilt compressors, on average, can cost $200 to $700. 3  This does not include the professional labor. 4  If the labor is included, this can bring the total up to $1,500 to $2,000. Used and rebuilt compressors, on average, can cost $200 to $700. 2  This does not include the professional labor. 3  If the labor is included, this can bring the total up to $1,500 to $2,000. 4  For example, some users on the website Clutchfans.net, claimed that their labor costs were a pinch shy of $1,800.
The electric field strength between two parallel conducting plates separated by 4.00 cm is 7.50Ã104V/m. (a) What is the potential difference between the plates? (b) The plate with the lowest potential is taken to be at zero volts.
The magnitude of the field is proportional to the number of field-lines per unit area passing through a small surface normal to the lines. Thus, field-lines determine the magnitude, as well as the direction, of the electric field. In particular, the field is strong at points where the field-lines are closely spaced, and weak at points where they are far apart. The electric field-lines associated with a positive point charge are a set of unbroken, evenly spaced (in solid angle) straight-lines which radiate from the charge--see Fig. 9.