Consider an automobile engine which operates on the ideal Otto cycle. In this engine, air is compressed with a compression ratio of 10. At the beginning of the compression process, air is at 105 kPa and 17oC, and in the combustion process 640 kJ/kg of heat is added to air. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition (combustion) process, (b) the net work output, (c) the thermal efficiency of the engine, and show the cycle on a P-ν diagram.

Consider a diffuser in which air flows steadily. At the inlet of the diffuser the pressure, the temperature and the velocity of the air are 100 kPa, 110oC and 175 m/s, respectively. At the exit of the diffuser the pressure, the velocity of the gas and the area of the diffuser are 110 kPa, 15 m/s and 0.1 m2 , respectively. Accounting for an heat loss of 3 kJ/kg from the diffuser to the surroundings at 100 kPa and 25oC and assuming constant specific heats, determine (a) the exit temperature, (b) the rate of exergy change and (c) the second-law efficiency of the diffuser where ηII, diffuser = exergy output exergy input .

make a scheme or illustration of the precipitation hardening process for aluminum alloys and explain each step

Vibrations Question in Mechanical Engineering:

Vibrating System

Stability Question

Describe in as much detail as possible what is meant by a stable vibrating system and state the condition which must be satisfied to achieve stability.

Problem 1. Explain the definition of the unit of quantity, the definition of SI, and the basic unit of SI. Also, select one of the SI basic units and explain the definition of the unit in detail. However, write it down so that high school students can understand it. Summarize the above in A4.

Design a robot that can support humanity from the spread of COVID-19 . Draw suitable diagrams and focus your explanation towards the robot subsystems.

What could be some of the reasons for the discrepancies between the Hilpert’s equation or the Churchill & Bernstein’s equation.

Research question: How is ceiling welding possible? (It welds in the overhead (overhead) position, how can the droplets that dissolve from the electrode tip not be lowered downward by gravity but transferred to the welding bath upward?)

1. Analysis and application of Coanda effect
2. Prove that the self-induced velocity of source segment at its center point only has normal component and equals to λ/2

Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa of a steam Rankine power cycle. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cycle

a. Sketch the cycle of a T-s diagram. Indicate the isobars with their values and the values for temperature and entropy.

b. The heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing.

c. The thermal efficiency.

d. Compute the entropy generated by the turbine per unit of mas of steam flowing.

e. The heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam flowing. [Hint: this refers to the cooling tower]

Manufacture methods course:

working process which will increase strength of metals? Draw the process.

explain mechanical mechanisms.

objective in real life.

1 kg of saturated steam at 1000 kPa is in a piston-cylinder and the massless cylinder is held in place by pins. The pins are removed and the system suddenly and adiabatically expands to 5x its original volume before the piston hits a pair of upper pins. The expansion takes place against an atmosphere is 60 kPa. What is the final specific internal energy of the system? The answer will be in kJ/kg.

I need to write an essay about the following:
Suppose you are in job interview of your dream job and the question asked to you ''OUT OF ALL CANDİDATES ,WHY WE SHOULD HİRE YOU?"

It must have
1.Introduction
2.Developing ideas -Minimum 2 paragraph
3. Conclusion

how do you relate the air fuel ratio to the equivalence ratio, and the ‘lambda’ ratio

List and explain the measuring elements (stages) of a dial indicator starting with the primary sensing element