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A 20g mass vibrates accordings to the equation x=0.0009cis(3pit/2 + pi/2). Find the amplitude, period, max velocity, max acceleration, spring constant "K", and the total energy of the system?
A concrete mix with a 3-inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1700 lb/yd^3 of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard.
A fine-bubble aeration basin has a flow of 21.5 mgd, an influent BOD of 180 mg/l, 31 mg/l of mmonia, and effluent of 10 mg/l. During the winter, the wastewater temperature of 14.8 degrees C does not nitrify.
A block begins to slide down a ramp after being elevated to an angle of 47.5 degrees. What is the coefficient of static friction
The force exerted by the potatoes on the frame at one side of the chair is equivalent to horizontal and vertical forces of 24 N and 84 N, respectively, at E and a force of 28 N perpendicular to member BH at G.
Draw a graph showing the effluent concentration as a function of time for : a. Zero order CMFR and PFR with the same influent concentration and reaction rate. b. First order CMFR and PFR with the same influent concentration and reaction rate.
Briefly explain how variation in water table elevation can result in overconsolidation of a soil and list oehr possible mechanisms that cause over consolidation of soils.
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
calculate the depth h of mud for which the 3m concrete retaining wall is on the verge of tipping about its forward edge A. the density of mud may be taken to be 1760 kg/m3 and that of concrete to be 2400 kg/m3.
What return period must an engineer use in the design of a bridge opening for a 50% risk that flooding will occur at least once in two consecutive years? Repeat for a risk of 100%.
a hydraulic jump is to be formed in a trapezoidal channel with a base width of 20ft and a side slope of 2:1. The upstream depth is 1.25ft and Q=1000 cfs. Find the downstream depth and the head loss in the jump.
If the pipe is designed with a safety factor of two [i.e. the maximum stress in the field must be less than half the rated yield stress], what is the maximum depth that can be safely reached for drilling.
using a prism and prism pole in conjunction with a total station, the bottom of the prism pole is placed on point A. the distance from the bottom of the prism pole to the center of the prism (HR) is 4.97 feet.
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