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Mechanical Engineering homework help

   All answers must have 5-7 sentences each, must be in own words 1. What is sol

  
All answers must have 5-7 sentences each, must be in own words
1. What is solar radiation? Explain with help of plank’s energy distribution (spectrum) diagram.
2. How do you calculate total irradiance from the sun?
3. Explain Stefan-Boltzmann law, Weins displacement law, and inverse square law.
4. Calculate total energy emitted by sun. (find energy emitted per unit area using S-B law, then multiply that with surface area of sun)_
5. Calculate total energy emitted by earth.
6. What is solar irradiance and what is its value on the surface of the earth. 
7. Explain a) scattering b) absorption and c) reflection of solar radiation
8. Explain the phenomena selective absorption in the atmosphere.
9. Explain the terms a) irradiation b) radiosity c) Insolation d) solar constant
10. Explain summer and winter solstice 
11. Explain monthly insolation at different latitudes on the surface. 
12. What is solar altitude angle and azimuth angle?
13. What is daily insolation and how do you calculate it. What are factor influencing it?
14. Explain with a diagram the ‘physics’ behind a flat solar collector.
15. How do you calculate energy absorbed and lost by a receiver of flat plate collector.
16. Explain specular, diffuse and general deflection of light.
17. How do you calculate energy ultimately absorbed in a flat plate collector.
18. What is Heat removal factor
19. How do you calculate efficiency of a flat plat collector?
20. For a flat plate collector if the transmittity, absorptivity and reflectivity are respectively 0.7, 0.8 and 0.7 respectively. Calculate the fraction of solar energy ultimately absorbed.
21. The flat plate collector in Q20 has area 20 m2. Solar radiation intensity available to the plate is 200W/m2. Calculate the amount of radiation absorbed by the plate.
22. For the same collector, if the surface temperature is 80oC and ambient temperature is 25oC. The overall heat transfer co-efficient is 15W/m2oC. Calculate the heat loss to surrounding from the collector
23. Calculate energy utilized by the absorber
24. Water is used to remove heat from the collector. The temperature of fluid at inlet and out let of the collector is 20 and 89oC respectively. Calculate the mass flow rate required.
25. Calculate the heat removal factor for the collector
26. Calculate collector efficiency

Categories
Mechanical Engineering homework help

   All answers must have 5-7 sentences each, must be in own words 1. What is sol

  
All answers must have 5-7 sentences each, must be in own words
1. What is solar radiation? Explain with help of plank’s energy distribution (spectrum) diagram.
2. How do you calculate total irradiance from the sun?
3. Explain Stefan-Boltzmann law, Weins displacement law, and inverse square law.
4. Calculate total energy emitted by sun. (find energy emitted per unit area using S-B law, then multiply that with surface area of sun)_
5. Calculate total energy emitted by earth.
6. What is solar irradiance and what is its value on the surface of the earth. 
7. Explain a) scattering b) absorption and c) reflection of solar radiation
8. Explain the phenomena selective absorption in the atmosphere.
9. Explain the terms a) irradiation b) radiosity c) Insolation d) solar constant
10. Explain summer and winter solstice 
11. Explain monthly insolation at different latitudes on the surface. 
12. What is solar altitude angle and azimuth angle?
13. What is daily insolation and how do you calculate it. What are factor influencing it?
14. Explain with a diagram the ‘physics’ behind a flat solar collector.
15. How do you calculate energy absorbed and lost by a receiver of flat plate collector.
16. Explain specular, diffuse and general deflection of light.
17. How do you calculate energy ultimately absorbed in a flat plate collector.
18. What is Heat removal factor
19. How do you calculate efficiency of a flat plat collector?
20. For a flat plate collector if the transmittity, absorptivity and reflectivity are respectively 0.7, 0.8 and 0.7 respectively. Calculate the fraction of solar energy ultimately absorbed.
21. The flat plate collector in Q20 has area 20 m2. Solar radiation intensity available to the plate is 200W/m2. Calculate the amount of radiation absorbed by the plate.
22. For the same collector, if the surface temperature is 80oC and ambient temperature is 25oC. The overall heat transfer co-efficient is 15W/m2oC. Calculate the heat loss to surrounding from the collector
23. Calculate energy utilized by the absorber
24. Water is used to remove heat from the collector. The temperature of fluid at inlet and out let of the collector is 20 and 89oC respectively. Calculate the mass flow rate required.
25. Calculate the heat removal factor for the collector
26. Calculate collector efficiency

Categories
Mechanical Engineering homework help

 All answers must have 5-7 complete sentences each. Must be in own words.    1.

 All answers must have 5-7 complete sentences each. Must be in own words.
  
1. Explain at least three problems with current energy use. (Write 5-7 sentences in your own words) 
2. Give solutions to these three problems. Justify your answers. (open-ended question)
3. Which of the seven issues listed in the handout is the most critical? Why?
4. Discuss the energy market share of various energy sources from 1800 to date and in the future (5-8 sentences). Explain the trends with a diagram. (5 -6 sentences)
5.  Global electricity production has increased constantly over the years. Identify three reasons (5-7 sentences) 
6. Three comments on global electricity consumption. (5-7 sentences)
7. Explain the global energy transition from 1800 to the future (2100) with the help of a diagram.
8. Draw at least ten conclusions from the Sankey diagram. 
9. Discuss five major environmental issues from coal. Discuss each in 3 sentence minimum.
10. Discuss global warming and estimates about future temperature rise. Show at least two references. 

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Mechanical Engineering homework help

 All answers must have 5-7 complete sentences each. Must be in own words.    1.

 All answers must have 5-7 complete sentences each. Must be in own words.
  
1. Explain at least three problems with current energy use. (Write 5-7 sentences in your own words) 
2. Give solutions to these three problems. Justify your answers. (open-ended question)
3. Which of the seven issues listed in the handout is the most critical? Why?
4. Discuss the energy market share of various energy sources from 1800 to date and in the future (5-8 sentences). Explain the trends with a diagram. (5 -6 sentences)
5.  Global electricity production has increased constantly over the years. Identify three reasons (5-7 sentences) 
6. Three comments on global electricity consumption. (5-7 sentences)
7. Explain the global energy transition from 1800 to the future (2100) with the help of a diagram.
8. Draw at least ten conclusions from the Sankey diagram. 
9. Discuss five major environmental issues from coal. Discuss each in 3 sentence minimum.
10. Discuss global warming and estimates about future temperature rise. Show at least two references. 

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Mechanical Engineering homework help

TNR: 12 font, MLA   1: Manufacturing Processes: Polymer Composite and Fiber Rein

TNR: 12 font, MLA
  1: Manufacturing Processes: Polymer Composite and Fiber Reinforced Polymer Composite 
 # 1A: Polymer Composite Introduction, Description along with figures and schematics, Working Principles, Advantages, Disadvantages, Summary, and References to process the Neat and Nanoparticle-Infused Polymer Composites using the following Methods: 1. Mechanical Mixing 2. Sonication 3. Magnetic Stirring 
 # 1B: Fiber Reinforced Polymer Composite Introduction, Description along with figures and schematics, Working Principles, Advantages, Disadvantages, Summary, and References to manufacture the Conventional and Nanoparticle Infused Fiber Reinforced Polymer Composites using the following Methods: 1. Hand Lay-Up/Wet lay-up 2. Vacuum Assisted Resin Transfer Molding (VARTM) 3. Compression Molding/Hot Press 4. Autoclave Molding 

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Mechanical Engineering homework help

1.  Report should include information about background, safety record of BP comp

1.  Report should include information about background, safety record of BP company, causes of explosion, consequences, companies involved and liability of the disaster 
2.  3 pages long excluding title page, table of content and references, 12 pt font, 1” margins and double spacing between lines. 
3.  include a bibliography, and inside text references must be included. 
4.  Appropriate section headings should be identified. 

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Mechanical Engineering homework help

Choose any one material of inetest and explain the following: 4 pages, 12 font,

Choose any one material of inetest and explain the following: 4 pages, 12 font, MLA 
Material: Iron
Please explain the following of the material Iron.
What is the material of importance?
What discovery/development led to the material impacting society?
What property of the material enables the technology?
What were the social implications of the development?

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Mechanical Engineering homework help

   2) For a 0.46 wt%C Ni-Cr steel plate, show any calculations to support your r

   2) For a 0.46 wt%C Ni-Cr steel plate, show any calculations to support your responses to the following queries: 
After pouring the melt into a refractory container and allowed to furnace cool to 728°C,
calculate the fractional amounts of the equilibrated phases formed within a plate.
 
For a steel with the attached time-temperature-transformation (TTT) diagram, give the processing of three steel items – one plate with a microstructure of 25% upper bainite, another plate of 100% martensite minimized for cracking, and the third plate with 75%
lower bainite.
 
For 2B and 2C, sketch carefully each microstructure expected for the four plates with
all the phases identified with their corresponding temperatures.
    
3)  For high technological industries, you evaluate metals and ceramics beyond the Fe-C alloys to more costly applications.
A. For one process, elect three alloying components for Ti alloys to give alpha-gamma 
phase from an eutectoid reaction and another process, give three alloying components added to Ti to give alpha-gamma phases near a peritectoid reaction. Be sure to describe each process in not more than three sentences. 
B. What alloying elements should you seek for stainless steel to have a bar or plate with martensitic phase, as well as explain why? 
C. For a material of the hypersonic plane, liquid Hf-Nb-Ta alloy infuses into a B4C packed bed and reacts to form a HfB2-HfC-Nb3B4-Nb4C3-TaC-Ta3B2 composite or the same boride-carbide precipitates embedded in a Hf-Nb-Ta alloy matrix. Determine the mass of Hf, Nb, and Ta needed to give you 1 kg of Nb3B4 in metal matrix having 50at%Hf- 45at%Nb-5at%T a. 
D. What two refractories or ceramics (no metals) must you consider to hold a Hf-Nb melt at 2500°C in preparation for a proper Hf/Nb ratio and a refractory to eventually add Ta to the Hf-Nb alloy in a subsequent melting of the Hf-Nb-Ta alloy at 3500°C? 
E. A hafnium-niobium melt contained in a graphite or carbon crucible (1 cm thick and 5 cm inner diameter) reacts to form an internal layer composed of HfC and NbC between the Hf-Nb liquid and the internal, graphite crucible. The figure below gives the diffusion coefficients of carbon in cm2/s for HfC, TaC, NbC and ZrC. 
Determine the carbon diffusion in HfC at 3600°C.
 
Estimate the carbide having the larger thickness in twelve hours between the
Hf-Nb liquid and the internal crucible wall?
 
F. From the Ta-C phase diagram, below, give the three-phase reactions for a eutectic, 
peritectic, peritectoid, congruent, and euctectoid reactions along with their respective temperatures at which they occur. 
4) . A Ta2O5 semiconductor at temperatures greater than 1000°C exists with doubly- charged, oxygen vacancies. Your engineering colleague argues strongly that these oxygen ionic defects convert the tantalate lattice into a p-type semiconductor – is he correct and give reasoning? 
B. Is the semiconductor n-type or p-type, if Al2O3 is added, instead of Ta2O5, to the NbO lattice and give your reasoning? 

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Mechanical Engineering homework help

Hi,there are total 14 questionsno word limitjust need to answer all questions in

Hi,There are total 14 questionsNo word limitJust need to answer all questions in the same file attached.

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Mechanical Engineering homework help

 3-page single space assessment/review of the Space Shuttle Challenger Disaster.

 3-page single space assessment/review of the Space Shuttle Challenger Disaster. This should include:
Please include at least 3 sources
–Introduction to the Space Transportation System
–The technical problem and reason
–The ethical challenge
-Your recommendations  
 
Notes are attached.