two large aluminum plates (k =240W/m.K) each 1cm thick with 10micrometer surface roughness are placed in contact under a pressure of 1bar in air (k=0.026W/m.K). The temperature at the inside and outside surfaces is 400 degrees Celsius and 150degrees Celsius. Calculate the heat Flux and the temperature drop due to contact resistance.

What are the synthesis methods for carbon nanotubes? What is the general growth mechanism for CNTs? List at least 2 potential applications for CNTs. What are the synthesis methods for silicon nanowires? List at least 2 potential applications for SiNWs.

In a heat treatment of a specific excavator bucket tooth of 15kg mass, the tooth is heated to 885⁰C and to achieve the required level of physical properties it needs to be cooled to the final temperature in a cooling tank using brine as the cooling medium. Determine the final temperature if the minimum required mass of brine initially at 20⁰C temperature is 260 kg, using specific heat values c_b= 3.71 J/g·K and c_s=0.47 J/g·K for brine and steel respectively. Assume no heat losses to the environment.

Advantages, disadvantages and typical applications for the Acoustic Emission Testing.

what is the impact that the technology did?

the technology is the auto focus cameras on the phone or cameras which is a mechatronics system

(can you type it please it is hard to read the handwriting )

Fluid enters a tube with a flow rate of 0.021 kg/s and an inlet temperature of 20°C. The tube, which has a length of 6.280 m and diameter of 15 mm, has a surface temperature of 30°C. Determine the heat transfer rate to the fluid if it is water. The heat transfer rate to the fluid, in W is?

explain the design , construction and working of a parallel and counter flow shell and tube types of heat echangers? also draw figures

The Acme Widget Company has generally followed a relative conservative business model and has done well. Their sales have been relatively stable over the past decade and represent about 40% of the powered widget market, with widgets operating on conventional fossil fuels – gasoline, diesel, and propane. One of the founders of the company recently passed on his voting stock to his son, who advocates moving the company in a new direction. He wants the company to pursue a new business opportunity with the design and manufacture of widgets that employ alternative energy sources. You have been hired as a consulting engineer by the company to help them decide if they should go forward. While you know next to nothing about powered widgets, they believe you can help them perform an objective RWW analysis.  

Describe in some detail how you would go about leading this analysis: what questions would you have for the company personnel, what other sources of data might you want to use and what information would you attempt to gather from these sources? Incorporate as many of the tools we have explored this semester as you feel apply. For example: Is the Design for X Spiderweb graphic relevant for this analysis? What role might forecasting techniques play? How important is it to be able to quantify various factors at each stage of the analysis?

Discuss how turbulence influence the heat transfer process in convection pipe flow

Discuss the meaning/importance in 2-3 sentences per term (directly copying verbatim answers from thesaurus will carry NO points)

(1) Beach or clamshell marks; (2) Chevron pattern; (3) Creep; (4) Endurance limit; (5) Factor of safety; (6) Fatigue life; (7) Fatigue strength; (8) Fracture mechanics; (9) Fracture toughness; (10) Griffith law; (11) Notch sensitivity; (12) S-N curve; (13) Shot peening; (14) Toughness; (15) Weibull distribution; (16) Weibull modulus.

make sure to type it not hand written.

Write a literature review on

• the catastrophic effect of failure and fatigue on structure

Dont just copy paste from net please

Explain the importance of the failure and fatigue analysis, and how these two are conducted in the industries.

What are the problems and uncertainities in doing these analysis?

Minimum Words required: 3000

Please dont just copy from net, write in your own words

1222

Air enters a heating section at 100 kPa, 9^oC, 45% relative humidity at rate of 10m³/min, and it leaves at 22^oC. Determine (a) the rate of heat transfer (Q^?) in the heating section and (b) the relative humidity (??) at the exit. (c) What-if Scenario: What would the relative humidity at the exit be if the relative humidity of the mixture changed to 75%?

91. What are the essential differences between arc welding and resistance welding ?

2. Essential differences between brazing and fusion welding?

3. Explain the basic principles of arc welding processes

4. Why arc welding is called stick welding

5. can arc welding be used to join plastic materials? explain

6. What is a flux

7. What are the purposes of using flux?

8. Flux can be used in which joining processes

9. What are the disadvantages of using flux

10. What are the advantages of mechanical fastening

Briefly describe how a Design of Experiments methodology can be used when testing a new pump design that has three variables (number of impeller blades, channel depth, outlet diameter). Why would a factorial design of experiments be better than optimizing each variable independently?