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1. A rectangular block of concrete 3 ft × 3ft × 6 in. has its 6- in. side half buried at the bottom of a lake 23 ft deep. What force is required to lift the block free of the bottom? What force is required to maintain the block in this position? (Concrete weights 150 1b/ft3)
2. A dam spillway gate holds back water of depth h. The gate weights 500 1b/ft and is hinged at A. At what depth of water will the gate rise and permit water to flow under it?
two infinite black plates of 600 and 100 degrees celcius exhange heat by radiation. calculate the heat transfer rate
Three cylinder weighing 100N each and of 80 mm diameter are placed in a channel of 180 mm width as shown
copper and platinum both have the fcc crystal structure and cu forms a substitutional solid solution for concentrations
determine the number of kmols of carbon monoxide contained in a 0.27 m3 compressed gas cylinder at 200psi and 72f.
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727°C (1341°F). (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form?
a solar-thermal-electric power plant collects energy from sunlight focused on a high-temperature collector where solar
A 24-inch RCP outfall discharges directly onto the ground. The pipe has a slope of 1.75 percent and n-value of 0.015 and carries a design discharge of 20 cfs. Design a riprap apron for the outfall.
an air compressor receives atmospheric air at t0 17degc 100 kpa and compresses it up to 1400 kpa. the compressor has
it has been proposed that energy be taken as heat from the atmosphere around milwaukee and used to run a power plant.
On the same stress-strain curve, using a dashed line, please construct the stress strain curve for the AA 2024 material that had been subjected to the 50% cold work. Explain the following: Why did you estimate the modulus to be as you drew it
a vessel of cylindrical shape is 50 cm in diameter and 75 cm high. it contains 4 kg of a gas. a manometer attached to
Air enters a pipe at 25 0C, 100 kPa at a flow rate of 36 m3/hr. A heater on the outside of the pipe draws 8 amps at a voltage of 120 V. All the heat from the heater is transferred to the air (well insulated and wall t is small). Assuming that the air..
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