If concrete weighs 145 pounds per cubic foot, what is the weight in pounds of a concrete footing that is 18" long, 12" high, and 12" wide ? Round answer to the nearest hundredth.
What will be an ideal response?
217.5
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Sally is making a sine bar, which is used to machine angles on parts (see Figure 4.19). She has a 1.250 in. thick bar that needs 90° grooves machined into it for precision ground 1.0000 in. diameter cylinders. A sine bar is used by placing different thicknesses under one of the cylinders so that the proper angle is attained. Sally wants the distance between the centers of the cylinders to be 5.000 in.
(a) How deep should she mill the 90° grooves so that the top of the sine block is 2 in. tall?
(b) Once her sine block is finished, she wants to mill a 22.5° angle on a brass block. What thickness of gage blocks will produce this angle for this sine plate?
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Power can be described as
a. how hard you push. b. how fast you push. c. how far you push. d. how long you push.
The unit of measurement of an AC voltage measured on an oscilloscope is ____.
A. peak B. peak to peak C. average D. rms
The typical gauge wire that is used in low voltage control circuits is ____________________ gauge.
Fill in the blank(s) with the appropriate word(s).