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A worker slowly moves a 50-kg crate to the left along a loading dock by applying a force P at corner B as shown. Knowing that the crate starts to tip at about the edge E of the loading dock when a= 200mm, determine:
(a)The coefficient of kinetic friction between the crate and the loading dock
(b)The corresponding magnitude P of te force
A small nitrogen container is at Pressure P1 = 5 bar and T1 = 300 K. It's been filled from a larger nitrogen container, which is P= 10 bar and T = 300 K.
Determine how much the thickness of the DNAPL layer has to build up with similar capillary characteristics but 1.08 g/cm3 density to migrate through a bed of fine sand of 0.5 mm diameter.
An ideal Sterling cycle operates between thermal energy reservoirs at 27 degrees C and 527 degrees C. The maximum cycle pressure is 2000 kPa.
Develop an estimate of the volumetric flow rate of air that will be required for aeration of the mixed liquor in an activated sludge system.For this calculation, assume that the (ultimate) CBOD is 200 mg/L and (ultimate) NBOD is 50 mg/L.
Describe the problem of lack of coordination between design and construction in a traditional contract. In agency CM,what expertise does the CM provide during the pre-design and design phase.
If an additional 11ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
A tank with a 3m diameter has an 8 cm orifice at the bottom. The tank is currently filled with water to a height of 2.5m above the orifice. If the orifice is opened, how long will it take until the height is 1 m.
A constant-head permeability test was conducted on a sample of fine silica sand. The cross-sectional area of the sample was 60 cm2 and its length was 150 mm.
The question asks for the magnitude and direction at the pin Aand int the cable BC needed to support a 500-lb ball load. The boomweight AB is neglected. AB is 8ft long and angled at 35degrees. The cable BC has an angle of 22 degrees and the500-lb bal..
the inclined leg differential manometer as shown in figure 1 below shows a reading along the inclined leg mercury
The wet mass of a sample of saturated soil is 520 grams. The dry mass, after oven-drying, is 400 grams. Determine the a) water content b)void ration c)saturated unit weight, and d)effective unit weight
A thin-walled pipe, of diameter 4 in., is held stationary in a river flowing at 6 ft/s parallel to its axis. The pipe contains a sharp-edged orifice, of diameter 3 in., with a contraction coefficient of 0.60 based on the area.
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