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A falling-head permeability test on a specimen of fine sand 16 cm; in area and 9 cm long gave a k of 7 x 10-` cm/s. The dry, mass of the sand specimen was 210 g and its p, was 2.68 Mg/m3. The test temperature was 26°C. Compute the coefficient of permeability of the sand for a void ratio of 0.70 and the standard temperature of 20-C. (Ariel A. Casagiantle.)
If the maximum total acceleration of the train must not exceed 1.5 m/s^2, determine the shortest distance in which the train can reach a speed of 72 km/h, and determine the corresponding constant rate of acceleration at.
The position of a car traveling between two stop signs along a straight city block is given by r=[9t-(43/2)sin(2t/5)]m, where t denotes time and 0s
Water flows in a circular pipe of diameter D at a depth y (
A 35 percent-efficient coal-fired power plant with effective height of 100 m emits SO2 at a rate of 0.6 lb/10^6 Btu into the plant. If winds are assumed to be 4 m/s at the stack height and just over 3 m/s at 10 m
A vertical pipe of 4ft diameter and 60 ft long has a pressure head of 22.7 ft of water at its upper end. when the flow of water through it is such that the mean velocity is 16 fps, the pipe friction head loss is hf = 2.8 ft.
A square building (15 m × 15 m in plan) is to be constructed on a site where the soil profile consists of 3m of clay with an over-consolidation ratio that varies from 5 at the surface to 2 at 3m overlying a 5m thick clay
What is the elongation of a rectangular bar (cross section 2 inch * 2 inch length 4 ft) When it is subjected to an axial load of 80,000 lbs. Assume the material of the bar has the following properties G = 7,700 KSI, V =0.30
A sample of 10 television tubes produced by a company showed a mean lifetime of 1200 hours and a standard deviation of 100 hours. Estimate (a) the mean, (b) the standard deviation of the population of all television tubes produced by this company.
Given that the max shear strength of the the concrete shore is 10 kPa and the engineer requires a F.S. of 2.5, find the required are of concrete for the thrust block.
An open test tube at 293 K is filled at the bottom with 12.1 cm of Hg and 5.6 cm of water is placed above the mercury. Calculate the pressure at the bottom of the test tube if the atmospheric pressure is 756 mm Hg
Write a particular specification for a cut-to-fill earthworks operation for a large sports field. Use the SABS 1200 format. You will have to establish realistic values for the density requirement of the fill, quality requirements and tolerances, m..
Determine the design load for strength and serviceability limit states (short-term and long term), for a steel beam in a residential building with the following data;
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