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Determine how many buses needed to provide service on the following route with the indicated characteristics:
-Route length: 16 miles (one way)
-Headway: 15 minutes
-Average number of stops made during run, one direction: 22
-Terminal time at each end: 10 minutes
-Average route speed: 38 miles per hour
-Acceleration/Deceleration time: 15 seconds per stop
-Dwell time (average): 35 seconds
a) How many buses needed?
b) How much of a reduction in terminal time would be required to reduce the number of required buses by one?
A 45 W electric mixer is operated for 5 minutes while mixing a 2 kg shake. Assume Csubv=4200 J/kg-K for the liquid. Determine the temperature rise (in degrees C) of the milk shake.
A consolidated-drained triaxial test on a normally consolidated clay yielded a friction angle of 28°. If the all-round confining pressure during the test was 140 kN/m2, what was the major principal stress at failure.
this concentration is based on an assumption that the individual is generally healthy and is exposed for 8 hours per day over a working lifetime ( that is from age 18 to 65 years). assuming a body weight of 78 kg and an inhalation rate of 0.63 m^3..
A spherical drop of water has r = .1mm . If the surface tension of water is 72 dynes/cm, calculate the pressure difference across the interface. Express the answer in dynes/cm^2. (Tip: theta = 0 for perfect fluid spheres)
Drawdown data from an observation piezometer near a well used for a pumping test with constant pumping rate is plotted on a semilog plot vs. time (the time axis, on the horizontal, is on a log scale).
Flow velocity is given by the function v= -5i +3j . Find the equation for the velocity potential, and the stream function ?. Sketch the equipotential line going through the origin.
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
The water table is lowered from a depth of 10' to a depth of 20' in a deposit of silt. All the silt is saturated, even after the water table is lowered. The silt's water content is 26%.
A vane, 10 cm long and 8 cm in diameter, was pressed into soft clay at the bottom of a bore hole. Torque was applied and gradually increased 45 N-m when failure took place. Subsequently the vane rotated rapidly so as to completely remould the soil..
A soil proposed for a compacted fill contains 38% fines and 62% coarse materials by dry weight. when the coars fraction has w=2.0%, its affinity of water is completely satisfied( that is,it is saturated but surface dry).
If the weight of the empty truck and tanker was 120 kN, please calculate the volume of gasoline in the tanker at the time of the crash in m^3. Furthermore, at today’s gasoline price of $2.58/gal, plus the cost of the 18-wheeler (purchase price of $98..
Calculate the peak bending moment for the 4x10 roof beam. Then draw a clear dimensioned FBD for the two exterior bearing walls above the floor joists, no moment calcs here.
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