A rectangular building with a near-flat roof is acted upon by wind at right angle to one of the walls. Which of the following envelope surfaces will be acted upon by positive (toward-the-surface) pressure and which envelope surfaces will be subjected to suction (negative pressure)?
Windward wall
Leeward wall
Side walls
Roof
Windward wall Positive pressure
Leeward wall Negative pressure
Side walls Negative pressure
Roof Negative pressure
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How is the top course of a vertical vessel’s sidewall jacket installation normally completed?
a. All bands and screws are installed as with other courses. b. The top band is left off until the beauty band is installed. c. The head jacket must be installed before the top course of sidewall jacket. d. Temporarily wire the jacket in place until the vessel head jacket is installed.
A lever consists of a round wheel that revolves around an axle
Indicate whether the statement is true or false
To minimize twisting or lifting injuries, many employers have _____
a. instituted stretching programs b. required fitness evaluations c. provided back braces d. hired strength coaches
Given a signal x(t) = tri(100t) form a signal x[n] by sampling x(t) at a rate fs = 800 and form an information-equivalent impulse signal x?(t) by multiplying x(t) by a periodic sequence of unit impulses whose fundamental frequency is the same f0 = fs = 800. Graph the magnitude of the DTFT of x[n] and the CTFT of x?(t) . Change the sampling rate to fs = 5000 and repeat.
What will be an ideal response?