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Suppose that from the past experience a professor knows that the test score of a student taking his final examination is arandom variable with mean 70 and standarddeviation 85
Assuming that the aggregate has negligible absorption, calculate the temperature of the fresh concrete. Also calculate how much ice is required to reduce the temperature of the fresh concrete to 61
Calculate the minimum set-back distance required for a national highway of 4 lane divided carriageway having circular curve of radius of 350 m & design speed 100 km/hr.
A sample of saturated soil was consolidated under an all-around pressure of 60 lb/in2. The axial stress was then increased without permitting drainage. The sample failed when the axial deviator stre
A point source with effective stack height of 50 m emits 80 g/s of on a clear summer day with surface winds at 4 m/s. Winds at 50 m are 5 m/s. An inversion layer starts at an elevation of 250 m.
A long line of burning agricultural waste emits 0.3 g/m/s of particulate matter on a clear fall afternoon with winds blowing 3 m/s perpendicular to the line. Estimate the ground-level particulate c
Higher water level inside the eye, combined with wind results in a "storm surge". Calculate the force on the levee gates form storm surge 20 feet above level of the lake traveling at about 25 ft/sec
The subsoil at the site is a thick layer of soft alluvial river silts and sands, the bearing capacity of the silt has been found to be in the region of 80 kN/m2. There is a high ground water table p
Reservoir A (water surface elevation = 1300 ft) is connected to reservoir B (water surface elevation=250 ft) by 6,000 ft of 14 inch diameter cast iron pipe (e = 0.005 ft. Neglecting all minor losses
Find the area of steel reinforcement required for a concrete T-beam for the following data; f'c = 3 ksi, fy=50 ksi,d=28 in, t= 6 in., bw= 16 in., bf= 60 in., and the section sustains a factored bend
Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment as a result of dead load of 60 kip-ft and a moment as a result of live load of 90 kip-ft
uniform rod makes with the vertical during the roll, and (b) the speed of the roller after it moves 4 ft., starting from rest. The roller rolls without slipping, and the rod hangs vertically (theta
Listed on cramster as ask. There is a car driving through water. Velocity is 12mph. Find h (max water depth) that will alow car to pass. List all assumption and calculations is the problem statement
An air bubble of .3 inch diameter is released from the regulator of a scuba diver 100ft below the waters surface. The water temp is 85 degree's F. What is the diameter of the bubble before it reache
The distance l, which is the distance between the outside face of the exterior support at the left-hand end of the beam and the center of the interior support at the right-hand end, is 30ft; the wid
The area shown is revolved about the x axis to form a homogeneous solid of revolution of mass m. Using direct integration, express the mass moment of inertia of the solid with respect to the x axis
Estimate the discharge in a rock-bedded stream (d84=30cm) that has an average depth of 2.21m, a slope of 0.0037, and a width of 48m. Assume ks=d84.
Three forces are applied to the bar. Determine the normal and shearing stresses at (a) point a, (b) point b, (c) point c.Assuming that the 750-N force is directed vertically upward.
what size galvanized iron pipe (e=0.0005ft) is required to carry a flow of 5 cfs of water at 60 degrees F (v=1.217X10^-5) without exceeding a head loss of 5.0 ft/100ft of pipe
Disk A of constant thicness and is at rest when it is placed in contact with belt BC, which moves with constant velocity v. Denoting by uk the coefficient of kinetic fr4iction between the disk and t
The characteristics of the line are 5,000 ft of steel pipe (e = 0.00015 ft) which has an ellipsoidal cross section (flow area = 4 ft^2; wetted perimeter = 8 ft); three standard elbows (K = 0.9 per e
How many truckloads of trucks hauling an average volume of 6 LCY (4.6 LCM) would be required to haul 1 million CCY (764, 600 CCM) of gravel to a dam site
A bacteria culture grows with constant relative growth rate. After 2 hours there are 600 bacteria and after 8 hours the count is 75000 a.) Find the intitial population.
A 23-lb crate is pushed by a force F, which has the magnitude that varies as shown on the graph. If the crate is originally at rest and it takes 3 seconds after applying the force to hit the bumper
A 5 cm diameter, 6 m high pole is fixed in concrete. The pole supports a circular 4 m diameter sign. Estimate the maximum moment that must be resisted by the concrete for a wind speed of 30 m/s