Near the harbour the sea got polluted cause by industrial waste, gives a few examples of prevention for sea pollution cause by industrial waste and elaborate on it, and how can it still happen even though rules and regulation are implemented

1. You can estimate the labor cost of erecting 284 tons of structural steel in either of two ways. The first method relies on a knowledge of erection labor cost expressed as cost per ton ($/tn) of steel. The second method relies on a knowledge of labor production expressed as crew hours per ton erected (crew hr/tn) and the hourly cost of labor expressed as cost per crew hour ($/crew hr).
   1. Which of the two methods is likely to give the most accurate estimate and why?

b. Your boss is wondering how the erratic and unpredictable changes in the purchase price of the steel is going to affect your estimate. Explain to her what effect, if any, this will have and why.

Please type or write legible thank you

1)Can an earthquake's magnitude or intensity vary from place to place? Why?

2)Describe the difference between porosity and permeability

3)How can groundwater overdraft (groundwater withdrawal is greater than recharge) lead to land subsidence?

4)Philosophically, what is the difference between the uncertainty in the design factors of an engineered structure and the uncertainty of the geologic properties of the site where the structure will be located? How can the discrepancy between the two uncertainties be accommodated to insure a successful project?

How to prevent water pollution and elaborates, and also why water pollution still happens even when there is laws regarding environment protection?

Show your understanding of the specific energy principle by drawing the specific energy curve
diagram. Represent all three depths applicable.

How do you calculate the overturning moment for each story of the building in Excel. Suppose we have a 5 story building that is 50 feet tall and each floor is 10 foot high. The force on the 5th floor is 10 kips, on the 4th floor it's 8 kips, on the 3rd floor it's 6 kips, on the 2nd floor it's 4 kips and on the first floor it's 2 kips. Is there a routine you can use in Excel that will calculate this without much effort and what would it be. The fourth floor will have an overturning moment of 10*10=100; the third floor will have an overturning moment of 10*20+8*10=280; the second floor overturning moment is 10*30+8*20+6*10=520; the first floor's overturning moment is 10*40+8*30+6*20+4*10=800; the base overturning moment is 10*50+8*40+6*30+4*20+2*10=1100

1. Using pictures and/or diagrams describe and explain four (4) basic modes of rock failures and the factors contributing to pit slope instability. (12 points)

Please type your answer, Please do not write on the paper and post it (minimum 2 page)

• Why do metals initially exhibit only elastic deformation under low loads?

• What causes metal plastic deformation to begin at higher stress levels?

• What occurs in metals on the atomic level that causes plastic deformation at high stress?

• What occurs in molten metals when they cool and solidify, both initially and then later?

design for british code 8110

1.A 500 mm square column carries a dead load of 1200 kN and imposed load of 400 kN. The safe bearing capacity of the soil is 180 kN/m². Design a square pad footing to resist the loads using the following material strengths: f_cu=30 N/mm², f_y=500 N/mm².

2.Design a pad footing for a rectangular column of section 300x500 mm supporting an axial factored load of 1,400 kN. The safe bearing capacity of the soil is 180 kN/m². Use f_cu= 20N/mm², f_y= 415 N/mm².

What are the steps of design process in architecture and explain each one?

A well-mixed sample (volume = 30 mL) of mixed liquor from an aeration tank of an activated sludge wastewater treatment plant was divided into two halves. The first half was filled in a 22.285 g crucible and placed in a drying oven at 105°C for 24 hours. The weight of the crucible and the residue after drying was 22.344 g. The crucible was then placed in a furnace at 550 °C for 30 minutes. After that the crucible with the ash weighed 22.310 g. The second half was filtered through a 0.151 g glass-fiber filter. After that the filter was placed in a drying oven at 105°C. The weight of dried filter with the residue was 0.196 g. The filter was then placed in a furnace at 550 °C for 30 minutes. After that the filter with the ash weighed 0.167 g.

a) Calculate (in mg/L): Total Solid (TS), Total Suspended Solid (TSS), Total Dissolved Solid (TDS), Total Volatile Solid (TVS), Volatile Suspended Solid (VSS), and Volatile Dissolved Solid (VDS).

b) Which value could be assumed the microorganism concentration in the aeration tank (X)

c) If the influent of the aeration tank of this activated sludge plant has a flow rate of 0.1 m3 /s, find the volume of the tank, if the required detention time is 2 hours.

d) In the influent BOD5 is 95 mg/L, find the food to microorganism ratio (F/M) for this activated sludge plant in ?? ??∙? . e) If a 2- Liter graduated cylinder was filled by an activated sludge sample from the same plant and the settled volume after 30 minutes was 800 mL, find the SVI.

Construct a precedence diagram (AON) b) On the diagram, compute the four activity dates (ESD, EFD, LSD, and LFD) and the floats (TF and FF) for each activity. c) Identify critical event(s), critical activities, and critical path(s) Please calculate and show results on the diagram in the following form: Act Time Predecessors B 5 - M 4 B N 9 B P 8 B L 6 M F 5 M,N C 8 N,P K 6 P G 7 L,F,C A 3 F,C D 7 C,K E 13 K H 3 G,A J 2 D,E,H

what a spatial model is by using some examples of real-world entities and how they could be modeled in GIS (e.g. the city of Denver could be modeled as a vector point in a map of the US or as a vector polygon area in a map of Colorado). What are the limitations of the spatial data models with regard to your example?

Assume you have a coal fired plant that produces 300 MW. The plant is 30% efficient. There is 0.2 lbs. of sulfur produced per BTU. There is 5% residual ash created. Assume you live 4km downstream to the plant. Its is a cloudy summer night with wind of 2.5 m/s. The effective stack height is 100m

1. What is the feed rate of coal to the plant (lbs. per hour)?
2. How much sulfur is produced per hour?
3. What is the concentration of sulfur at your house? - list all assumptions you use
4. Assume the concentration is too high, what should you do?
5. How much ash is produced per day
6. If you have decided to build an ash landfill that can hold 256 years’ worth of ash at the current rate of production, and the coal ash density is 100lbs/cy, how many cubic yards of landfill space must be created?
7. At a cost of $50 per ton of excavation. How much will the landfill excavation cost?