A soil core (cylindrical) is extracted during a well installation. It has a dry weight of 2 kg, a length of 50 cm, and a diameter of 5.2 cm.

a. Estimate the bulk density and the porosity of the core (assume it is quartz sandstone (density = 2.65 g/cm3 ).

b. How much water is needed to achieve an average water saturation of 30%?

c. Estimate the specific yield if the specific retention is 0.06.

d. How much water would yielded from this sandstone aquifer if the water table drops 5 feet? (Assume the aquifer is 1 square kilometer). Report in cubic feet and gallons)

what are the principles of risk and general contract provision

A highway construction company is under contract to build a new roadway through a scenic area and two rural towns in Colorado. The road is expected to cost $18,000,000, with annual upkeep estimated at $150,000 per year. Additional income from tourist (Benefits) of $900,000 per year is estimated. The road is expected to have a useful commercial life of 20 years. Determine if the highway should be constructed at a discount rate of 6% per year, applying the Conventional B/C method . Remember to state your decision (Build or don’t build).

The Sustainable Development goal (SDGs) the essay should be on is goal 16 (peace and justice strong institutions). Look at the Mining industry in Africa (preferable Zambia in central Africa). Write everything in 1000 words.

I only want solution related to goal 16 and related to mining industry

Flow on a particular day is approximately 2,000 vph. At 10:00 AM, an incident occurs which reduces capacity to 1,600 vph. The incident is cleared 45 minutes later and the flow returns to the normal capacity of 2,400 vph. (a) Draw the fundamental diagram. (b) Draw a time-space diagram that shows the evolution of traffic. (c) Assuming there are no ramps upstream, what are the speeds of the forming and clearing shock waves of the queue upstream of the incident? (d) Assuming that the demand does not change, compute the duration in which the maximum flow of 2,400 vph is observed at the location of the incident.

I have a solid square aluminum beam. It is 12 inches long with cross sectional area .25" x .25". A force is applied to the center of the rod and supported at the ends. I need to know the maximum force before the aluminum fails. Equations and work done would be great so I can change the length and cross section if needed bigger or smaller max load.

A specimen of concrete column (200 x 200 mm) of 1.5 m long with 4 steel rebars (20 mm in diameter) inside with same length. If Ec = 21 Gpa, Es = 210 GPa, and free shrinkage strain = 0.0004, estimate the force carried by concrete and steel after shrinkage. If concrete tensile strength, ft = 5 MPa, will crack develop in this specimen?

Water at 70°F flows by gravity from a large reservoir at a high elevation to a smaller one through a 55-ft-long, 2-in-diameter cast iron piping system that includes four standard flanged elbows, a well-rounded entrance, a sharp-edged exit, and a fully open gate valve. Taking the free surface of the lower reservoir as the reference level, determine the elevation z1 of the higher reservoir for a flow rate of 10 ft3/min. The density and dynamic viscosity of water at 70°F are ρ = 62.30 lbm/ft3 and μ = 2.360 lbm/ft·h = 6.556 E–4 lbm/ft·s. The roughness of the cast iron pipe is ε = 0.00085 ft.

-The elevation z1 of the higher reservoir is ft.

(Please be accurate)

1. A concrete to concrete joint made in such a manner that the faces of the new and old concrete adhere sufficiently to prevent any relative movement across the joint; it creates some weakness in the concrete structure so care must be taken to where they are to be placed. These joints are called:

Select one:

a. Metal joint

b. Construction joint

c. Stop joint

2.

Piles may be made from all the following except one:

Select one:

a. Steel

b. Precast concrete

c. Brick

d. Timbe

3.

Reinforcing Steel is placed in the bottom of the footing to:

Select one:

a. Carry compression

b. Reduce shrinkage

c. Carry tension

d. Increase permeability

4.

The process of regularly spraying water or covering the concrete with moisture-retaining materials, or using chemical surface sealer in order to protect the exposed surfaces of newly poured concrete from evaporation and drying is known as:

Select one:

a. Consolidation

b. Hydration

c. Curing

d. Segregation

5.

A mat foundation placed at a depth such that the weight of the soil removed from the excavation is equal to the weight of the building above, so the stress in the soil beneath the building is the same after construction as it was before is known as:

Select one:

a. Pad (Spread) Footings

b. Strip Footings

c. Floating foundation

6.

When steel strands are tensioned before concrete is casted and requires heavy abutments to restrain the strands and is normally only done with concrete in precast plants, but not on the construction site is known as:

Select one:

a. Pre-tensioning

b. Post-tensioning

7.

When the column is located at or near a property line the following shallow foundation is used.

Select one:

a. Caissons

b. Combined footing or cantilever footing

c. Piles

d. Pad footings

write the simulation algorithm for Two lane one way traffic condition.(explain along with a flow chart).

Q (a)why steel formwork is preffered ? Explain with neat sketchs , the formwork for RCC beam.

(b) What is meant by Demolition ? What are the factors affecting the evaluation of Demolition methods ?