Questions
The average temperatures (°F) for an 8-day period are: 32,35,34,36,48,43,42, and 40. If the area has...

The average temperatures (°F) for an 8-day period are: 32,35,34,36,48,43,42, and 40. If the area has an initial SWE of 2.46 in, K=0.06in/deg-day, and a runoff coefficient of CR = 0.5, plot the estimated daily runoff (in) from the watershed and determine the total melt and runoff for the 8-day period.

In: Civil Engineering

Wastewater Engineering: Find out which water treatment plant serves your home, draw a diagram including each...

Wastewater Engineering:
Find out which water treatment plant serves your home, draw a diagram including each of the main components of the process. Describe the objective of each of the individual components.

In: Civil Engineering

Construct a BOD demand curve for a sample that has a first order reaction constant K...

Construct a BOD demand curve for a sample that has a first order reaction constant K of 0.16 day–1 (base 10) and a nitrogenous reaction constant KN 0.08 day–1 (base 10). Nitrification is not significant until a period of 7.5 days has passed. The ultimate first stage BOD is 335 mg/L and the ultimate nitrogenous demand is 120 mg/L. 1) What is the total BOD exerted at 10 days? 2) How many complete days are required to exert at least 90% of the expected demand?

In: Civil Engineering

A simply supported beam 10m long carries a uniform load of 24 kN/m. Using E =...

A simply supported beam 10m long carries a uniform load of 24 kN/m. Using E = 200 GPa, I = 240x10^6 mm4

Using CBM (conjugate beam method):

A. Determine the rotation (in degrees) of the beam at a point 4m from the left support.

B. Determine the deflection at a point 4m from the left support.

In: Civil Engineering

Q. Describe briefly how the coefficient of consolidation (Cv) value can also be estimated based on...

Q. Describe briefly how the coefficient of consolidation (Cv) value can also be estimated based on a full scale loading trial. Explain why it is more reliable to use the Cv value obtained from a field trial than from a lab test ?

In: Civil Engineering

understand sustainability in terms of social, economical, political influences?

understand sustainability in terms of social, economical, political influences?

In: Civil Engineering

Design a roof drainage system?

Design a roof drainage system?

In: Civil Engineering

Describe a safety hazard you've encountered in the workplace? How was the hazard corrected? Did anyone...

Describe a safety hazard you've encountered in the workplace? How was the hazard corrected? Did anyone get injured? Were you involved in correcting the hazard? What was the final outcome? If it was not corrected, what do you think should have been done?

In: Civil Engineering

Calculate the first three frequencies of axial vibration of a bar fixed at one end.

Calculate the first three frequencies of axial vibration of a bar fixed at one end.

In: Civil Engineering

I. Solve the homogeneous differential equations with the constant coefficient. a. ? ′′ + 5? ′...

I. Solve the homogeneous differential equations with the constant coefficient.

a. ? ′′ + 5? ′ + 6? = 0

b. 4? ′′ − 8? ′ + 3? = 0 ? (0) = 2, ? ′ (0) = ½

 II. Solve non-homogeneous differential equations with the indeterminate coefficient method.

a. ?′′ − 3? ′ = 5cos(?)

b. ? ′ ′ + 5? ′ + 2? ′ = 7? 3?

III. Solve non-homogeneous differential equations with the parameter variation method.

a. ? ′′ − 2? ′ + 3? = ? 2? ? 2

b. ? ′′ − ? = 3??(?)

IV. Solve non-homogeneous differential equations by the operator’s method.

a. 3? ′′ + 3? ′ + ? = √?? −?

b. 6? ′′ − 2? ′ + ? = ? 2

In: Civil Engineering

Scraper tare (empty) 72000 kg Average load carried 31 m3 Density of material, in bank 1650...

Scraper tare (empty)

72000 kg

Average load carried

31 m3

Density of material, in bank

1650 kg/ m3

Load factor I

0.7

Distribution of load to driving wheels (% of gross weight)

57 %

Uphill grade on haul road, loaded

4 %

Traction coefficient, haul road

0.53

Rolling Resistance Factor, loaded

0.38 kN/t

Average speed, haul

15 km/hr

Haul distance

1020 m

Average speed, return empty

44 km/hr

Return distance (by different route)

1130 m

Efficiency factor (operator and scraper together)

42 min/hr

Fixed time is made up of:

Spot time

0.8 min

Load time

2.9 min

Dump time

1.4 min

a) Calculate the gross vehicle weight (GVW) (kg)

(Answer in kg)

b) Calculate maximum tractive force (kN) on road at driving wheels when loaded

(Answer in kN)

c) Calculate the effective grade % on the haul road.

d) Calculate total resistance (kg) while hauling.

e) Calculate the total cycle time (minutes).

f) Calculate production rate, in Bank m3/hr.

In: Civil Engineering

why do Engineers use PIN connection support during calculations but does not use it in actual....

why do Engineers use PIN connection support during calculations but does not use it in actual. What is the effect of this?

In: Civil Engineering

1. Solve for the area between x^3 − 6x^2 + 8x − y = 0 and...

1. Solve for the area between x^3 − 6x^2 + 8x − y = 0 and the x − axis.

2. Solve for the area bounded by y^2 + x − 4 = 0 and the y − axis.

3. Solve for the area of the arch of the cycloid x = θ − sinθ, y = 1 − cosθ.

4. Solve for the area bounded by x^2 − 2x − y = 0 and x^2 − 6x + y = 0.

In: Civil Engineering

A developer is going to build a new commercial building in Kowloon Tong. The features of...

A developer is going to build a new commercial building in Kowloon Tong. The features of the building are described as follows:

  1. Number of storey: 25 floors
  2. Floor areas: approx. 600m2 (each floor)
  3. Core areas: approx. 100m2 (each floor)
  4. G/F to 2/F: Restaurant premises (40% of the UFA); Retail establishments (60% of the UFA)
  5. 3/F to 25/F: Office premises

Note: UFA denotes Usable Floor Area

i ) Calculate the total cooling load for a given building.

This part fulfills the requirement of P5

In: Civil Engineering

researchers were interested in the effects of cannibis and ecstacy on abstract thinking.Participants were given a...

researchers were interested in the effects of cannibis and ecstacy on abstract thinking.Participants were given a task that required them to solve problems/tasks using abstract thinking.Researchers also included a group of nonusers. Base on the scenario, identify the Idependent variable and the dependent variable. Is the IV a quasi or experimental?. what is the research question.

In: Civil Engineering