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A 10m height chimney has a 2.0m x 2.0m square cross section. The wind blows horizontally in a direction which is parallel to one of the diagonals of the cross section. Careful measurement shows that, at height y from the ground, the magnitude of the wind velocity is given by
u = 1.16 * Unom* log(750*y) for y > 1m
where Unom = 5m/s. The density and viscosity of air are 1.2 kg/m3 and 2.0x10-5m2/s respectively.
Estimate the force on the chimney and the bending moment at the bottom of the chimney. You may assume that the effect of the wind on the first 1 m height of the chimney has a negligible effect on the force and the moment.
A very fast-moving train car passes you, moving to the right at 0.50c. You measure its length to be 12m. How long does David measure the train car to be
Prepare journal entries to record the actual revenues and expenditures. Assume all transactions resulted in increases or decreases in cash.
Consider the following definition of discrimination
Dividend Yield The market price for Macro Corporation closed at $33.07 and $47.93 on December 31, 2008, and 2009, respectively. The dividends per share were $0.42 for 2008 and $0.58 for 2009.
120-v rms signal at 60.0hz is applied across a 30.0mH inductor and a 100 resistor. what is the rms value of the voltage across the inductor
Accrued $576 interest on Elkin City bonds. Dec. 31 Accrued $620 interest on Morgan Co. bonds. 2013 Mar. 1 Received semiannual interest on the Elkin City bonds. June 1 Received semiannual interest on the Morgan Co. bonds.
A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
In Career Focus: A Personal Job Search Guide, Martucci Lamarre (2006) suggests that if we want to realize our job dreams, we need to think about ourselves as products to be marketed.
An elastic cord is 63.9 cm long when a weight of 71.1 N hangs from it but is 88.9 cm long when a weight of 184 N hangs from it. What is the "spring" constant k of this elastic cord
Watson uses four units of direct material in each finished unit. The direct material price has been stable and is expected to remain so over the next six months.
The two upper lengths of the welded Y-shaped assembly of uniform slender rods have a mass per unit length of 0.3 kg/m, while the lower length has a mass of 0.7 kg/m. Locate the mass center of the assembly. lenghts of all rods aew 30mm
The bar is 1m long and its weight, W, acts at its midpoint. The angle is a=30 degrees, and the the spring constant k= 100N/m. The spring in its current position is 1.52m long, and its unstretched length of 1.25 m occurs when the bar is vertical a=..
A lunar module weights 1500 kg on earth where g = 9.75 mps2. On the surface of the moon where g = 1.70 mps2, what will be the force in Newtons required to accelerate the module at 10 mps2?
Beam Deflection Solution, Derive an expression for the deflection due to shear for a cantilever beam of constant rectangular cross section, under action of a point load, P at free end.
Assume that the width of the intersection in 24 ft and the car is 20 ft long. If the driver's perception-reaction time is 0.75 seconds, determine if he can clear the intersection safely for the following conditions
A stream conveying a flood peak of 50 m3/s (velocity 1.25 m/s and depth 1 m) is divided into 1 km long reaches for solution of the unsteady equations. Determine the largest value of ft for which the solution will be stable.
A 32mm rebar with a guage length of 200mm was subjected to tension to fracture according to ASTM E-8 method. if the rebar is loaded to 390kn only ad then unloaded, what is the premantnt change in length.
Determine the runoff rate at t = 15.0 hr from a two storm system if the first storm drops 2.0-inches starting at t = 0, and the second storm drops 5.0-incheds starting at t = 12.0 hrs.
he concentration of carbon in an iron-carbon alloy is 0.15 wt%. What is the concentration in kilograms of carbon per cubic meter of alloy
determine the adequacy of W16x40(A-36) of steel beam that supports a uniform load of 800 pounds per foot over a span of 30 feet
The Record-a-Song company has contracted with a rising star to record eight songs. The sizes in MB of the different songs are 8, 3, 5, 5, 9, 6, 7, and 12, respectively. Record-a-Song uses two CDs for recording. Each CD has a capacity of 30 MB.
Body A and body B are connected by an inextensible cord. If both bodies are released simultaneously from rest, what distance do they move in 3 sec and what is the tension in the cord. The weight of A is 50 lb and the weight of B is 10 lb.
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