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A 3 kg mass is attached to one end of a 1 m long cord. The other end of the cord is attached to the center of a rotating disk (with radius greater than 1 m) that has a very large constant angular velocity. The 3 kg mass is dropped onto the rotating disk. If the maximum tension that the cord can handle is 50 N and the coefficient of kinetic friction between the disk and the mass is 0.1, find the time it takes to break the cord. (Assume that the disk is rotating faster than the angular velocity needed to break the cord).
Determine the transformed moment of inertia for the beam using steel as the reference material. Express your answer in in^4 to the nearest 0.1 in^4.
determine the pressure head at the nozzle inlet to produce a water jet velocity of 40 ft/s. Neglect the friction loss and assume incompressible flow.
what pH is required to precipitate all but 0.20 mg/L of iron from a raw water with an Fe 3+ concentration of 2.1 mg/L Assume the temperature is 25 C. The reaction isFe(OH)^3 = Fe + 3 OH^- and pKs= 38.57
water from a reservoir is being supplied to a powerhouse that is located at an elevation 935 ft below that of the reservoir surface. Discharging through a nozzle, the water has a jet velocity of 240 fps and a jet diameter of 6 in.
What is the alkali-aggregate reaction? List some of the rock types that are vulnerable to attack by alkaline solutions. Discuss the effect of aggregate size on the phenomenon.
Footings for a structure are to be built beneath a basement slab on a clay soil at a depth of 20ft below present ground level. The groundwater table is 15 ft below the ground surface. The soil-void ratio is about 0.87.
Calculate the compacted cubic yards per hour if a compactor with a 5-ft drum width travels at 3 mph over a 10-in. lift of aggregate base course with 4 passes required to meet density specifications under average operating conditions.
A 1.00 mol sample of an ideal gas (gamma = 1.40) is carried through the Carnot cycle. At point A, the pressure is 25.0 atm and the temperature is 600 K. At point C, the pressure is 1.00 atm and the temperature is 400 K.
Air enters an electrical furnace at 20oC, 100 kPa, with a volumetric flow rate of 30 m3/min. The furnace delivers air at 40oC to a duct system with three branches consisting of two 15-cm-diameter ducts and a 30-cm-diameter duct.
A project involves transporting iron pipe to a jobsite that is 43 miles from the supplier. The pipe will be hauled in trucks that can carry 16 pipes per load. Each pipe is 20 ft in length. The average haul speed of a truck will be 50 mi./hr and re..
1. What does the acronym ANSI stand for Stands for American National Standards Institute 2. What is the purpose of a titleblock The purpose of a title block is for give us enough information about the project.
Estimate the effective friction angle for the sand (assume c' = 0). Calculate the sand's shear strength (τf) on a horizontal plane at depths of the 20 ft and 50 ft.
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