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Identify and state the historical significance of the middle passage.
What will be an ideal response?
The transatlantic passage from Africa to the New World. The middle passage was the route through which slaves were brought to the Americas.
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?Why should the temperature extremes a weld will be seeing in service be important to the selection of a filler metal for a weld?
A. ?Some welding electrodes produce more heat than is needed to make a weld if the metal is very cold. B. ?Some metals become very brittle and crack easily at low temperatures. C. ?Some arc welding electrodes will not hold an arc if the metal is too cold. D. ?None of the above
For the motor in Problem 7.1, and for a fan-type load, calculate the following, assuming that the supply frequency is reduced by 20% and the v/f ratio is kept constant:
a. Motor speed b. Starting torque c. Starting current d. Motor efficiency (ignore rotational and core losses)
Draw the shear and moment curves for each member of the frame in Figure P5.44. Sketch the deflected shape. Treat the shear plate connection at B as a hinge.
Name the roof that is a combination of a hip and a gable roof. The center section of the roof is framed in a method similar to that for a gable roof. The ends of the roof are framed with a partial hip that blends into the gable:
What will be an ideal response?