piper cherokee wing area is 16m², span is 9.75m. total weight is 1100kg. airfoil is NACA 65-415 and lift coefficient slope is 0.1033 per degree. αL=0 is -1.5degree. Assume τ = 0.12. when air density is 1.23Kg/m³ and speed is 193Km/h. Determine the wing's angle of attack

Explain what is Poisson’s ratio, and define all the variables in the definition.
What is the maximal (minimal) value of the Poisson’s ratio?
Does the volume change in compression and expansion depend on the Poisson’s ratio (explain why and how)?

Sketch model system and explain the use of nuclear energy for PWR (pressure Water Reactor) Power Plant. Complete your answer with T-s, P-v and h-s diagram if known:

Compressed liquid enter heat exchanger 260^oC ; 150 bar

Compressed liquid out heat exchanger 220^oC ; 100 bar

fluid enter heat exchanger 212.4^oC ; 20 bar, saturated liquid

fluid out heat exchanger 240^oC ; 20 bar, superheated vapor

Steam out of turbine 0.04 bar ; x=90%

a) Calculate how much calorie that has to be generated by the reactor per kg liquid

b) Calculate power generated by the turbine

c) Calculate ratio mass flow rate compressed liquid (liquid cooled reactor) to fluid

a.Why is the radius of crack opening critical?

b.Explain the crack growth from a surface crack and how it grows. Why does it not need to be over half the cross sectional surface area to fracture?

c.Use the Hunt Library or your preferred source and research how alloying and heat treatment can reduce or worsen the expected life.

Six Sigma intended to be deployed from the Top - Down, i.e. from Corporate Level down to Process Level. Share your thoughts with regards to trying to deploy the strategy from the "Bottom - Up". That is to say, use projects at the lower levels in the organization to grow a Six Sigma strategy at a company. Consider the size of the company and the willingness of the company to accept change

A two-phase liquid–vapor mixture of Refrigerant 134a is contained in a 2-ft3, cylindrical storage tank at 100 lbf/in.2 Initially, saturated liquid occupies 1.6 ft3. The valve at the top of the tank develops a leak, allowing saturated vapor to escape slowly. Eventually, the volume of the liquid drops to 0.6 ft3. If the pressure in the tank remains constant, determine (a) the mass of refrigerant that has escaped, in lb, and (b) the heat transfer, in Btu.

PLEASE USE THE NUMBERs FROM THIS QUESTION. I am trying to compare my answers because I keep getting it wrong. Thank you

You graduated as a mechanical engineer five years ago, taking a job as a trainee engineer with a major automotive manufacturer. Since you were not happy with this company, you left three years ago to work for Hallmark, a large UK-based engineering consultancy company with several important offices worldwide. Hallmark commonly contract-out their employees to other companies (many consultancies do this). These often involve Hallmark engineers working for many months (sometimes years) at the other company, forming close working relationships with the company's engineers and other staff, and being party to information and data that are confidential to the company.

Soon after you started at Hallmark, they contracted you to work for PartCo Ltd, a large company that designs and manufactures automotive parts (PartCo often contract with Hallmark for engineers when PartCo has important work that requires extra staff). PartCo is a worldwide organisation and does business with most UK, European and Japanese automobile manufacturers. You joined a group doing relatively routine, but highly demanding, work on clarifying the design details for a new range of constant velocity (CV) joints for front-wheel drives. This required computer-based

engineering simulations of the parts, testing of prototypes, and final assurance of the products before the designs were released for manufacturing.

Whilst you have been doing this, you got a really good idea for a completely new type of CV joint. You have worked on the idea at week-ends and now believe that it could revolutionise vehicle propulsion. You have continued to work privately on this idea after returning to Hallmark to work on other, non-automotive, jobs.

You have told no-one at either PartCo or Hallmark of your private activities on the new CV joints.

Questions

(i) What intellectual property (IP) is involved here?

(ii) Who owns it?

(iii) If you wished to secure and exploit rights to the new CV joint, how would you go about it?

(iv) Could you justify your actions ethically?

Air enters an adiabatic compressor at 100 kPa (absolute) and 20 ºC at a rate of 0.075 m3 /s, and it exits at a pressure of 900 kPa (absolute). The compressor has an isentropic efficiency of 70 percent. Neglecting the changes in kinetic and potential energies, determine (a) the exit temperature of air and (b) the power required to drive the compressor.

How does a crack grow and why does the mean stress level influence the rate of growth within a metallic component? Is this material specific and if so explain why? Include how maintenance can influence the ‘life-expectancy’ of an aircraft.

Describe and quantify what you can do to improve ride comfort in a multi-degree-of-freedom model. make an example

Research paper on: Features and benefits of condensing oil furnaces, in one paragraph

I need a research paper on: Electronic controls for oil burners, in one paragraph.

The city of La Paz in Bolivia lies at an altitude of 3650m above sea level. Average atmospheric pressure is 62.3 kPa, average daytime temperature is 8.8 oC, and average relative humidity is 55%. The power station at La Paz airport uses a Baltimore Aircoil 3501A cooling tower; water coming from the condenser cooling circuit enters the top of the tower at 144 litres/s at 36 oC. Moist air at average ambient conditions enters the bottom of the tower and exits at the top at 12 oC with a relative humidity of 100%. The change in air pressure between inlet and outlet is negligible.

(a) If the evaporative cooling process in the tower loses 4% of the incoming water stream, what is the temperature of the cold water leaving the bottom of the tower?

(b) Under these conditions, what is the cooling capacity of the tower in tons? The rated capacity of the tower at normal ambient conditions (i.e. sea level, 21 oC wetbulb) is 500 tons: why is it operating so far from this point in La Paz?

(c) What is the volume flow rate of dry air leaving the tower?

Water enters a circular tube whose walls are maintained at constant temperature at a specified flow rate and temperature. To compute the rate of heat transfer between the walls and the fluid, using the flow Nusselt number the following temperature difference is used;