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Problem: For a coarse aggregate sample of oven dry mass = 1000 g, absorption of 1%, and Bulk Relative Density (dry) of 2.62:
Question 1. Assuming all pores to be water accessible, calculate the porosity of this sample (volume of pores per unit volume of aggregate)
Question 2. Calculate the Saturate Surface Dry (SSD) Relative Density. Assume the density of water = 1000 kg/m^3
Which of the following is true for a thermistor with a negative temperature characteristic A) Decreasing temperature produces decreasing resistance in the thermistor. B) Increasing temperature produces decreasing resistance in the thermistor.
A cantilever beam AB has a rectangular cross section and is loaded by a force P at an angle α that acts at the centroid of the cross section. Two strain gages are placed at point C, which is at mid-height of the beam. Gage D measures the strai..
A submerged surface has an area of 25 square feet, and the resultant force acting on it is 100 pounds, what is the pressure exerted on the surface, in psi
A rectangular concrete beam has f'c=3000 psi and steel with fy=40ksi. Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment as a result of dead load of 60 kip-ft and a moment as a result of live load of 90 ..
A rectangular channel is 25ft wide and has a flow of 500 cfs at a velocity of 5ft/s. (a) Determine the specifc energy of water in the channel. (b) What is the criticl depth of water in the channel (c) What is the critical velocity
If we apply a breaking system to a skateboard while the speed of the skateboard is 5Milies per hour, the rider average weights is 180bounds while his height is 170 cm. You can assume the distance as it is 50meters.
Consider a solar-energy-powered ideal Rankine cycle that uses water as the working fluid. Saturated vapor leaves the solar collector at 150 psia, and the condenser pressure is 0.95 psia. Determine the thermal efficiency of this cycle.
What is the theoretical maximum amount of work that could be done by a gas in a piston expanding from 10 L to 20 L (pressure of the surrounding atmosphere is 100 KPa)
A hydroelectric plant passes 8 million gal/min across a head of 600 ft. If the turbine is 80 % efficient and head loss in the system is 200 feet. What is the power output?
Two Cables support a large lift which weighs 8 tons. find the forcein the cables and size them based on E= 30000 psi and the allowabletensile stress is 14400 psi.
Determine the critical load of a round wooden dowel that is 0.9m long and has a diameter of (a) 10mm (b) 15mm. Use E=12GPa
A horizontal 150mm pipe, in which 40 l/s of oil (S=.8) is flowing, contracts to a 75 mm diameter (left to right). If the pressure in the 150mm pipe is 300kPa, calculate the magnitude and direction of the horizontal force exerted on the contraction
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