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Mud is stopped using a wall made from 1.2 m high x 0.25 m wide rectangular concrete blocks as shown in figure below. Blocks density is 2700 kg/m3, mud density is 1800 kg/m3, and friction coefficient between ground and concrete blocks is f = 0.3 . There is concern that concrete blocks may slide or tip over the lower left edge as the mud level rises. Determine the mud height at which
A) The blocks will overcome friction, and
B) The blocks will tip over.
Drinking water at 10oC for an office complex must be pumped along a horizontal section of PVC pipe 50 m long at 2 m/s. The pipe has a nominal diameter of 62.5 mm and is Schedule 40. What is the head loss in m?
Finding the volume of hydrogen, A hydrogen filled balloon of the type used in cosmic ray studies is to be expanded to its full size which is a 100-ft diameter sphere, without stress in the wall at an altitude of 150,000 ft.
the service life of a battery used in a cardiac pacemaker is assumed to be normally distributed. a random sample of 10
a closed rigid stationary and adiabatic pressure vessel initially contains two-phase h2o at a pressure of 175 kpa and a
a satellite is in earth orbit with an altitude at perigee of 555.0 km and an altitude at apogee of 1200.0 km. a. what
A 9º wedge is inserted using a force of 1000 lbs. The static coefficient of friction between the wedge and the log is 0.50. Determine the force required to pull the wedge out.
a dragster comes off the start line with an acceleration of 4 ms2. the acceleration increases uniformly from 4 ms2 to
the exhaust gas from a diesel-powered electric generation plant will be used to generate steam in a shell-and-tube heat
a quantum stabilizer made of cold-worked columbium is 15in long and has a rectangular crosssection 14in by 34in. for a
to understand the physics of the o-ring we may need to start formulating the problem in a static equilibrium condition.
A small hydroelectric power plant produces electrical power at a rate of 30 kW. The plant utilizes a stream of water that drops 40 m from a lake to the turbine and flows at a rate of 100 kg/s. What is the efficiency of the turbine-generator?
a heat pump is used to maintain a house at a constant temperature of 23degc. the house is losing heat to the outside
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