The production of X3 d foil used in printed circuit boards is accomplished by an electroforming operation in which a slowly rotating titanium drum acts as the cathode to plate copper onto its surface. The drum diameter = 500 mm and its width = 300 mm. At any moment during the process, 40% of the drum’s circumferential surface area is submerged in the electrolytic bath (the ends of the drum are insulated to prevent plating). As the copper foil exits the bath, it is peeled from the drum surface. If the thickness of the foil = 0.05 mm on the drum surface when it is peeled, and the process operates at a current of 500 amps. Determine the rotational speed of the drum

answer:

constructing a building's framework requires a solid foundation

explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

6.3 is the answer

explanation:

because it is the ex