Concept explainers
(a)
Find the amount of radiation emitted from a hot pavement in Arizona.
(a)

Answer to Problem 35P
In SI units, The amount of radiation emitted from a hot pavement in Arizona is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Formula used:
The relationship between degree Celsius
Here,
The formula for the amount of radiant energy emitted by a surface is,
Here,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, The amount of radiation emitted from a hot pavement in Arizona is
Conclusion:
Hence, in SI units, The amount of radiation emitted from a hot pavement in Arizona is
(b)
Find the amount of radiated emitted from a hood of a car.
(b)

Answer to Problem 35P
In SI units, The amount of radiation emitted from a hood of a car is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, the amount of radiation emitted from a hood of a car is
Conclusion:
Hence, in SI units, the amount of radiation emitted from a hood of a car is
(c)
Find the amount of radiated emitted from a sunbather.
(c)

Answer to Problem 35P
In SI units, The amount of radiation emitted from a sunbather is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, the amount of radiation emitted from a sunbather is
Conclusion:
Hence, in SI units, the amount of radiation emitted from a sunbather is
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Chapter 11 Solutions
Engineering Fundamentals: An Introduction to Engineering
- Q2: Determine the change in dimensions in each section of the bar shown in figure. The portion AB is circular section and portion BC is rectangular section. E=115GN/m², v=0.33. L1 L2 P2+ P2 B Q3: A block is subjected to the stresses as shown in figure, find: principal stresses, shear stress with their directions and the normal and shear stresses on a plane inclined at 0. All stresses in MPa. (Confirm your answer by means of Mohr's stress circle). Txy 30 Note: (1) For all questions the student can choose any values of P1, P2, P3, W1, W2, a, σ (MPa), Txy (MPa), 0°, length and the dimensions of cross section area.arrow_forwardFor the gravity concrete dam shown in the figure, the following data are available: Unit weight of concrete (y)-2.4 ton/m Neglect Wave pressure, silt pressure, ice force and earth quake force) -0.65, (7)-1 ton/m Find factor of safety against sliding and overturning (F.Sa & FS), If heel and toe stresses (Pa & Pen) are 57.17ton/m² and 84.53 ton/m² respectively. w.s.l 83m Solve and sketch on paper 10m 80m 8marrow_forwardNeed assistance with d.arrow_forward
- 2. A series of gears are mounted on a 40mm diameter steel shaft. Take G = 75 GPa. (i) Draw the torque load diagram. (ii) Determine the angle of twist of gear B relative to gear A. (iii) Determine the maximum shear stress and it's location along the shaft. 600 N-m 900 N-m 200 mm 200 mm 200 mm 500 Nm 300 N·m 200 mm 500 N-marrow_forward1. The figure below shows a circular shaft with three sections. The length of each section is 50mm. (E 500 MPa). = (i) Draw the axial load diagram of the circular shaft. (ii) Determine the average normal stress at points A, B and C. (iii) Determine the maximum deformation and it's location along the shaft. 10 mm 5 mm 5 mm B 300 N A 900 N 800 N C 200 Narrow_forward02: For the gravity concrete dam shown in the figure, (the vertical stresses at toe and heel ((Pmax & Pmin) are 199 and 52 ton/m respectively. following data are available:- -Unit weight of concrete (ycone)-24 ton/m³ -Neglect Wave pressure, silt pressure, ice force and earth quake force. #-0.65 Find factor of safety against sliding and overturning (F.Sslid & F.Sover) AS 115 m 8 m 120 m Solve with sketch on paperarrow_forward
- please solve and neglect the distance between the two angles for simplecalculationsarrow_forwardDetermine the required solids retention time (SRT) of a completely mixed activated sludge aeration tank for a conventional activated sludge system treating a design flow rate of 34,560 m³/d, where the effluent standards are 30.0 mg/L for BODs and 30.0 mg/L for total suspended solids (TSS). Assume that the BOD5 of the effluent TSS is 70% of the TSS concentration. Assume the BODs concentration leaving the primary clarifier is 128 mg/L that the MLVSS concentration (X₂) is 2,500 mg/L. Assume the following values for the growth constants: Ks 100 mg/L BODS ⚫ Hm - 2.5 d 1 kd = 0.050 d 1 Y = 0.50 mg VSS/mg BODs removed Express your answer in days and round to the nearest 0.1.arrow_forwardFor the gravity concrete dam shown in the figure, the following data are available: Unit weight of concrete (7)-2.4 ton/m Neglect Wave pressure, silt pressure, ice force and earth quake force) -0.65, (7)-1 ton/m' Solve on paper and sketch Find factor of safety against sliding and overturning (F.Sa & F.S), If heel and toe stresses (Pain & P) are 57.17ton/m2 and 84.53 ton/m² respectively. Solve in table on paper w.s.l 83m 10m 8m 80marrow_forward
- 1. Find moments of inertia around horizontal and vertical centroid axes for given 6 cross sections. 30cm 4) "T 0cm 1116 5) 20cm 5cm 6)arrow_forward1. Find moments of inertia around horizontal and vertical centroid axes for given 6 cross sections. 1) 30cm 5cm 10cm 20cm 2) 3)arrow_forwardAn anchored sheet-pile bulkhead is shown in the figure below. Let L₁ = 2 m. L₂ =6 m. l₁ = 1 m = 17 kN/m². sat -18.86 kN/m², '=32°, and c=27 kN/m². Use the free earth support method. Anchor Sand = 0 Water table L Sand Ysat c' = 0 Clay = 0 1. Determine the theoretical depth of embedment, D. (Enter your answer to three significant figures.) D= m 2. Calculate the anchor force per unit length of the sheet-pile wall. (Enter your answer to three significant figures.) F= kN/marrow_forward
- Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage LearningResidential Construction Academy: House Wiring (M...Civil EngineeringISBN:9781285852225Author:Gregory W FletcherPublisher:Cengage Learning


