(a) Apply Maxwell relation and Gibb’s first equation (du=TdS-Pdv) to find the (∂u/∂P)_Trelation in terms of directly measurable properties (P, V and T). For an ideal gas, what will be the value of that partial derivative?

(b) Illustrate physical meaning of Inversion line with the help of T-P diagram.

(C) Assume that carbon dioxide (CO2) is collected from bacterial decomposition of organic matter at 5℃, and atmospheric pressure (100 kPa), and is required to be used in a process at -30℃, 40 bar. Apply theory of real gas behavior to calculate how much actual minimum work input and heat transfer is required to reach this state. Also, suggest some devices that can be used to obtain this state change

31. Write a report on advancement in wheel and tyre technology.Also the report should be consest of 10-12 Page,Advantage disadvantage,Future scope.Plagarsim level should be Zero.

Please don't answer if you don't know and write the report on 10-12 page minimum.
For small answer or for plagrism I will downrate your answer.So if you know than only answer it

Consider that a 1.35 wt% C- 98.65 wt% Fe alloy. Determine the weight fraction of the following.

(a) Proeutectoid Ferrite:
(b) Proeutectoid Cementite:

(c) Pearlite:
(d) Ferrite in Pearlite:

An airplane with a total span length of b = 60 m and cord length of c = 6 m wants to land at the airport. Holiday Rentals wing profile is NACA 23012 and single slot flaps are open while landing (α = 12 °, CL, flapli = 3, CD∞ = 0.07). Airplane Find the weight (kN) of the aircraft if it lands at 1200 kW thrust (ρ air = 1.2 kg / m3 ).

what are the thermal properties of composite materials??? with references, please.

Develop a simple MIS (Management Information System) that consists of a simple database (a text file). The system manages to dynamically input record/data into the database. The data from the database can be sorted, searched and updated. User also should be able to add new records/data, remove any data and etc.
Here are some ideas of MIS that can be developed:
1. Hotel reservation system.
2. Students management system.
3. Payroll management system.
4. Bus/Railway/Plane ticketing system.
5. Clinic record management system.

A solid propellant rocket engine gases at 3000 K stagnation temperature and 6000 kPa stagnation pressure It manufactures. The exit and throat areas of the nozzle are 0,01 m2 respectively. and 0.005 m2 Adiabatic base of the produced gases 1,4 and the gas constant is 320 J / kg.K. Find the thrust produced by the rocket at a height of 25 000 m (kN).

Give a step by step process of veryfying that a component under a set of loads will not fail.
Soild Mechanics course question

Determine the mass flow rate of the refrigerant flowing through the condensor of a two-stage compression refrigeration cycle (in kg/s). The fraction of the refrigerant that evaporates as it is throttled to the flash chamber is 0.19. The enthalpy of the refrigerant entering the evaporator is 55.14 kJ/kg and the enthalpy of the refrigerant leaving the evaporator is 239.19 kJ/kg. The amount of heat removed from the refrigerated space is 28 kW. (Round your answer to three decimal places).

1. Residual stress refers to stresses induced by plastic strain. T or F
2. Failure criteria is identical for ductile and brittle materials. T or F
3. Statically indeterminate problems can be solved by using additional equations provided by Hooke's Law. T or F.
4. To analyze stress at any point of any component or structure , one should consider:
5. The stress developed in a cylindrical pressure vessel along the longitudinal axis is:

Q8. Using a machine element , describe fatigue in engineering materials . Why is fatigue loading more dangerous than normal loading. As a design engineer, how can you prevent failure by fatigue.

1. One important point for an automobile radiator design is to cool the engine while moving at 50 km/h on a 7% grade road in a desert summer condition. Your responsibility as a design engineer is to make sure that the coolant (water in this case, since it is the hot summer time, no antifreeze is needed) temperature at the radiator inlet does not exceed the saturation temperature of water at this point. Consider a radiator that can be approached as a cross – flow heat exchanger with both fluids unmixed and working under the following conditions:

The manometer reading at the radiator water inlet is 100 kPa (the gage pressure!) where the local atmospheric pressure is also 100 kPa.

The engine heat rejection rate: q = 40 kW.

For air; flow rate 2700 kg/h, inlet temperature 52 ℃, specific heat 1008 J/kg.K.

For water; flow rate 5130 kg/h, specific heat 4244 J/kg.K.

For the radiator UA = 1134 W/K.

1. Determine the water inlet and outlet temperatures and air outlet temperature from the radiator. (15 P)
2. Determine the logarithmic mean temperature difference correction factor F and estimate the value of corrected logarithmic mean temperature difference for the radiator. (10 P)
3. Neglecting the pressure losses within the radiator, determine whether the design is safe or not against overheating (against boiling within the radiator). (15 P)
4. One effective way of obtaining safe operating conditions against radiator overheating may be increasing fan power to obtain higher air flow rates. If your findings for Part c) indicate unsafe operating conditions, determine the minimum air flow rate that ensures safe operation against the radiator overheating. To do this, increase the air flow rate with 90 kg/h intervals, until yuo reach safe operating conditions, while keeping the other parameters fixed at the above given values. (15 P)

1. A low quality coal known as Saray lignite has the components of C = 45%, H = 4%, O = 17%, S = 4%, N = 2%, A = 13% and W = 15%. Carry out the following analyses for this lignite:

1. Using the exact formula determine the heating value. (5 P)
2. Draw the Ostwald dagram in a scaled manner. (10 P)
3. After the combustion, 6% CO₂ and 10% CO contents are measured in the stack gases. Obtain the excess air coefficient and the ratio of O₂ within the stack gases, utilizing the Ostwald diagram you drew in Part b). (10 P)
4. Determine the excess air coefficient and the ratio of O₂ within the stack gases, using the analytical relations and compare the results with the ones you obtained in Part c). (10 P)
5. In what type of boiler and under which conditions do you think this lignite should be used in the lights of above estimated values of fuel components, the excess air coefficient, and the heating value. (10 P)

2. A refrigeration machine has been designed based on R134a. The design capacity is 15 tons.   The evaporator coil design temperature is 8 oC. The refrigerant enters the compressor as a slightly superheated vapor at 15 oC. The condenser coil design pressure is 14 bar. Refrigerant enters the expansion valve as a compressed (subcooled) liquid at 44 C. Note that the temperature of the air passing over the tubing in the evaporator coil will be higher than 8 oC and the temperature of the air passing over the condenser coil will be lower than the coil temperature. Use 80% for the compressor isentropic efficiency.
a. Calculate the power required to run the compressor under these design conditions and the required mass flow rate of R134a. (30 pts)

b. Find the rate of heat transfer for the condenser (high pressure side) of the system. (15 pts)

c. Find the quality of the refrigerant as it enters the evaporator. (10 pts)



3. A small gas turbine engine is used to produce power for auxiliary systems. This is a simple gas turbine open to the atmosphere. Air enters the compressor at 1 bar, 300 K. The compressor pressure ratio is 3.5:1. After passing through the combustion chamber, the air enters the turbine at a temperature of 1300 K. Determine the mass flow rate of air needed for the turbine to produce 60 kW of power. Also determine the heat that must be generated in the combustors. (30 pts) Solar collector …

g. Crazing and peeling are defects associated with glazing process; explain how they are different, and how they can be prevented?
h. Identify at least THREE processes that are line of sight processes.
i. List at least one limitation of PVD process.
j. Identify at least one failure mechanism associated with CVD coatings.
k. Gas turbine blades are to be refurbished; identify the process(es) and major steps involved in this process.
l. Identify at least TWO limitations of flame spraying.
m. What is a comparative advantage of using plasma arc thermal spraying process?

Theory of Bernoulli ,why is p_2<p_1and v_2>v_1?

what is temperature?

what is heat?

why do we use water tower?