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A recording tape passes over a 20-mm radius drive drum B and under the idler drum C. Knowing that the coefficents of friction between the tape and the drums are us=.40 and uk=0.30 and that drum C is free to rotate, determine the smallest allowable value of P if slipping of the tape on drum B is not to occur.
Determine the height "h" on the wall to which the firefighter can project water from the hose...and the speed of the water at the nozzle is v= 55ft/s. The firefighter is holding the hose 3.5 ft from the ground and the wall is located 15ft from the..
A Bonda portable generator is powering a small travelling fridge (120V) in your RV and consumes 125 watts. The efficiency of the generator's gas motor is 23% and the electrical portion (power head) is more efficient at 91%.
Suppose that you issued a query against a search engine and the search engine retrieved 125 documents. Suppose that there are total, Define Data mining confusion matrix
the hull of a boat has a volme of 150m and the total mass of the boat when empty is 8560kg. determine how much load this boat can carry without sinking in a lake.
An airport runway has a capacity of 60 operations (ie landing and take-offs) per hour. In a particular hour, there are 30 landings evenly spaced over the hour. During that same hour, 20 departing aircraft uniformly arrive at the runway within a 20..
A PVC pipe has an inside diameter of 40 mm, is 30 m long and carries 10°C water at a rate of 3.5 m3/hr. At this rate, the friction factor of the pipe is 0.0814.
determine the minimum length of a 5/16 inch, side fillet weld that will be necessary if the plate is subjected to an axial stress of 20 ksi . use an allowable shearing stress through the throat of the weld of 21 ksi.
A constant head permeability test was conducted on a clean sand sample. The diameter and length of the test specimen were 10 cm and 12 cm respectively.
A cylinder with a moveable piston holds .20 lb of hydrogen initially in a volume of 1 cu ft at a tem-perature of 1300 F. Then the volume is expanded to 2.5 cu ft while the gas pressure remains constant.
Determine the deflection angle to the last full station on a horizontal curve with Da=3 degrees. The PI is located at station 12.20 and the central angle is 24 degrees.
A simple beam of Douglas-Fir Larch, select grade, has a span of 18 ft with two concentrated loads of 3 kips each placed at the third points of the span. Neglecting its own weight, determine the size of the beam with the least cross-section
A 300 mm diameter pipe is placed in a 3 m deep rectangular trench that is 0.60 m wide. The trench is backfilled with clay that has a bulk unit weight of 18.8 kN/m3. Compute the dead load due to backfill that the pipe must support.
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