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1.Determine the minimum height on the wall to which the firefighter can project water from the hose, so that the water strikes the wall horizontally. The speed of the water at the nozzle is Vc=48ft/s. Distance from the hose to the wall is 30ft. and vertical distance from the ground to the hose is 3ft. No angle is given.
2.A container with a plunger compresses one pound mole of an ideal gas from 1 atmospheres pressure to 10 atmospheres. Calculate the amount of work done if the process is considered to be polytropic. Assume the temperature to be 273K and the value of k for the process to be 1.4. All losses are neglected.
A jet on an aircraft carrier is launched by a catapult. What are some of the parameters that would be taken into account to make sure the aircraft achives a specified speed at the end of the ship
A proposed combined cycle power plant is shown below. A gas turbine engine, the topping cycle, takes air at state 1 (T=300 K, P=100 kPa) and compress it irreversibly (hc=0.87) to state 2.
Stripping overburden in the Illinois coal belt, the Dusty Coal Company uses 270-horsepower, track-type tractors (with direct-drive transmissions) and drawn scrapers.
Determine the evaporation rate for a reservoir if the wind speed is 40 mph and the surface temperature is 15 degrees Celsius and the overlaying temperature is 25 degrees Celsius. and the relative humidity is 30 percent
Water flows through a 250-mm diameter steel (C=120) pipe at a a velocity, V = 1.5 m/s. Using the Hazen-Williams equation, what is the head loss due to friction per 1000 m of pipe
A Single clean layer of sand in a rapid-sand filter has an average grains size of 20X40 US. Mesh, porosity go 0.4, sand specific gravity of 2.65, and shape factor of 0.85. The absolute viscosity and density of water are 1.4X10^-3 Pa-s and 998 kg/m^3,..
A 40 kg sheave a OF RADIUS R=350 mm. and cenral radiusof gyration k=250 mm carries a 160 kg load b and is suspended by a cable and a spring of modulus k=1.2 kN/m. if the system is relased from rest in the positon show the spring is stretched 100 mm d..
What is the average length of queue, the average time spent in the system, and the average waiting time in the queue?
A direct shear cell 25.4cm x 25.4 cm in plan is filled with dry sand. a normal load of 6kN is applied to the sample, and the shear failure is 3.5kN. What is the anle of internal friction for the sand?
A ciricular sewer is laid on a slope of 0.5%. What diameter is required if the concrete pipe is to carry 25 cfs If the desired design mean suction velocity is between 3 and 7 ft/s, is the design acceptable
assume you are an observer standing at a point on the track for a period of 30 minutes and are recording the instantaneous speed of each vehicle as it crosses your point. what is the time-mean speed and space-mean speed for these vehicles for this..
A smooth hump is placed in the bottom of the channel. What would be the depth of flow over a 3 ft high jump. How high can the hump be made without backing flow up What would be the depth of flow over and just upstream of a 6 ft high jump
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