What is a soldering copper?

What will be an ideal response?


A soldering copper is a tool made with a wooden or plastic handle, steel shank, and copper tip. It may
also have an electric heating element.

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If the effective area of the raster of an electron microscope specimen, supplying information to the CRT of an electron microscope, has a 5nm diameter and the semicone angle, a, of the electron beam is 0.01 rad.:

(a) What would be the maximum usable magnification of the microscope if a digital spot on thescreen of the CRT has a 100 µm diameter? (b) What would be the depth of field at this magnification? (c) What would be the depth of field if this microscope were to be operated at a magnificationof 2000X?

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Current thinking about the relationship between productivity and quality is that there is a

direct relationship between the two factors.

Indicate whether the statement is true or false.

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What disadvantage is there in using an electromagnetic chuck?

A) It requires a very dense pole piece arrangement to be effective B) Heat is generated and must often be compensated for C) It must be used dry to avoid shock hazard D) None, it is always advantageous

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If the INVERTERS are counted as gates, the circuit in the accompanying figure requires a connected of ____ different gates.



a. three
b. seven
c. eight
d. eleven

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