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Laboratory clean rooms are often kept at a slightly higher pressure than ambient pressure in order to flush out particulates and keep dust from getting in. If the pressure in such a room is equivalent to 1 mm water greater than the surrounding rooms, with what velocity will air exit under a small crack in the door? Assume that viscous effects are negligible, i.e., that no energy is lost in the flow
A movable cone fits inside a stationary conical depression. If a torque is applied to the cone, the cone will rotate at a certain speed depending on the angles θ and β, the radius r o, and the viscosity μ of the liquid.
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface A factor of safety of 2 is to be maintained against bea..
A pipe is to be installed under the ground on a bed of aggregate 6 in. thick. The entire weight on the aggregate from pipe and soil above the pipe is 1800 lbs. per linear foot of pipe. What is the pressure on the soil if theta is 45 degrees? Assum..
Roof trusses such as the one shown are spaced 6 m apart in a long, rectangular building. During the winter, snow loads of up to 1 KN/m^2 (or 1 KPa) accumulate on the central portion of the roof. Find the force in each member for a truss not at the..
water flows through a horizontal plastic pipe with a diamter of .2 m at a velocity of 10 cm/s. determine the pressure drop per meter of pipe using the Moody chart.
A single strain gage is cemented to a solid 4-in diameter steel shaft at an angle B = 25 degrees with a line parallel to the axis of the shaft. Knowing that G = 11.6*10^6 psi
A shallow lake can be considered a CFSTR. Nitrification, the conversion of ammonia to nitrate (NH3 -> NO3-) occurs in the lake according to first – order kinetics. One stream feeds the lake and one stream empties the lake with the flow rate in both b..
Adequately describe the abiotic factors that determinethe types and numbers of species found in yourzone. Examples of factors: temperature, access to sunlightfor photosynthesis, dissolved oxygen content, availability of nutrients such as carbon.
flow of 600cfs is measured at a depth of 3.4 ft in trapezoidal channel with bottom width of 25ft and side slopes of 3:1(h:v). The channel reach has a slope of .002. Estimate the channel roughness.
The tank contains water to depth of 2m and oil (SG=0.8) on top of the water to a depth of 1m. Determine the magnitude and location of the resultant force acting on one end of the tank (i.e. 3m high by 3m wide).
a suspension bridge cable of span 100 m and central dip 10 m is suspended from the same level at two towers. the bridge
The Biosolids from a wastewater treatment process contains 1 mg cadmium per Kg of dry solids. The biosolids from the plant contain 23% solids and have a specific gravity of 1.01. If the state department of environmental quality has
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