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A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi.
What do you understand by the term durability? Compared to other considerations, how much importance should be given to durability in the design and construction of concrete structures?
A hawk flying at 2 m/s at an altitude of 45 m accidentally drops its prey. The parabolic trajectory of the falling prey is described by the equation below until it hits the ground, where y is its heig
A three-span continuous H20 timber beam with three equal spans of 1.3 mts supports a uniform load of 22.46 KN/m^2 with intensity q = 20.214 KN/m.
A segment of urban four-lane (two lanes in each direction) has a 3% upgrade that is 1500 ft long followed by a 1000-ft 4% upgrade. It has 12ft lanes and 3ft shoulders.
A highway reconstruction project is being undertaken to reduce crash rates. The reconstruction involves a major realignment of the highway such that a 60 mi/h design speed is attained.
A mechanic uses a crowfoot wrench to loosen a bolt at C. The mechanic holds the socket wrench handle at points A and B and applies forces at these points.
The casting has a mass of 3 Mg. Suspended in a vertical position and initially at rest, it is given an upward speed of V mm/s in 0.3s using a crane hook H.
The inclined leg differential manometer as shown in Figure 1 below shows a reading along the inclined leg mercury manometer of 50mm. Determine the pressure difference between A and B.
A car travelling at 60 mph in a construction area skids into a stack of concrete barriers. Skid marks leading to the crash measures 150 ft. The car was travelling on a 3% upgrade on a pavement with fr
Given bulk density as 1300kg/cubic meter and field capacity as 22% by weight and permanent wilting point as 10% by weight calculate available water capacity.
A vertical curve is formed when a rural highway passes under a bridge joining a -8% grade to the horizontal grade satisfying the requirement for safe speed of 90 Km/hr . Determine the minimum cl
The fixture AC is designed with a screw adjustment to regulate the height of the 900 N load supported by the roller at A. The screw bears against a smooth surface at B. Determine the reaction fo
A 1: 1.8: 4.5 mix has a water/cement ratio of 0.6 and a cement content of 300 kg/m3. The temperature of the ingredients are as follows: cement 180C, aggregate:300C, water:20 0C.Assuming that the
The voltage for registering a bit of 1 on Ethernet can be as low as 2.5 volts or event 1 volt.why is this so low when the capacity for transmitting electricity on the copper wire is so high.
Describe the difference between population standard deviation and sample standard deviation. Describe a scenario in which you would use each.Other than the calculation of statistics, how could an
Lets design the members if they are made of wood(compression and tension design strength = 5000psi) or aluminum (???compression and tension design strength= 20000psi). Do not use any safety factor
Four laboratory-scale, continuous-flow, completely mixed activated sludge reactors have been operated using wastewater from a yeast production plant. The data found are shown in Table below. Det
A boatman must carry a wolf, a goat and a cabbage across a river in a boat which is so small that he can carry at most, only one of them with him in at a time.Moreover whenever the wolf and goat
following results were obtained from direct shear tests on specimens of a sand compacted to the in-situ density.determine the values of the shear strength parameters c' and o'.normal stress is 5
16.5 The California ambient air quality standard for visibility requires that the average σ e be less than 0.23 km - 1 when the relative humidity is less than 70%. To what visual range doe
Consider four nodes with a symmetric full mesh of traffic demands each having data rate d. That is there is a demand of d bps from each node to every other node in the network. (a) If the phys
A television station is considering the sale of promotional dvds. It can have the dvds produced by one of two suppliers. Supplier A will charge the station a set-up fee of $
A signal s(t) is defined as: s(t) = 4cos(3πt) + 5cos(21πt) volts. The signal s(t) is sampled using ideal sampling with a sampling period of 38.095 milliseconds. What is the scaling factor