An air-standard dual cycle has a compression ratio of 9.1 and displacement of Vd = 2.2 L. At the beginning of compression, p1 = 95 kPa, and T1 = 290 K. The heat addition is 4.75 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine: a) each of the unknown temperatures at the various states, in K. b) the net work of the cycle, in kJ. c) the power developed at 3000 cycles per minute, in kW. d) the thermal efficiency. e) the mean effective pressure, in kPa.

In: Mechanical Engineering

An air-standard dual cycle has a compression ratio of 9.1 and displacement of Vd = 2.2 L. At the beginning of compression, p1 = 95 kPa, and T1 = 290 K. The heat addition is 5 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine: a) each of the unknown temperatures at the various states, in K. b) the net work of the cycle, in kJ. c) the power developed at 3000 cycles per minute, in kW. d) the thermal efficiency. e) the mean effective pressure, in kPa.

In: Mechanical Engineering

Please explain 3 different types of communications.

List what are the positive and negatives about the about each type of communication and give an example of each type of communication in aviation maintenance.

In: Mechanical Engineering

1. Does recrystallization eliminate mechanical fibering in a workpiece? Explain.

2. Explain advantages of the cold, warm and hot working of metals, respectively.

In: Mechanical Engineering

what are some examples of everyday objects/things that use:

gas power cycle

vapor power cycle

refrigeration cycle

In: Mechanical Engineering

(a)
plane has a wing using a NACA 2410 aerofoil. It is an altitude of
8000m and has an angle of attack of 5deg. How far could it glide in
km. (4s.f, tolerance +/- 0.1km)?

(b) same plane (with NACA 2410 aerofoil) still at an altitude
of 8000m is now flown with an angle of attack of 2degree. How far
could it now glide in km? (4s.f)

In: Mechanical Engineering

(a)Air, which can be assumed to behave as an ideal gas, undergoes a process from 150kPa and 400K to 600kPa and 500K within a piston cylinder. Can this process occur adiabatically? (Think about what the limitations on ???? are to answer this question). (b)Now consider air which is compressed in an air compressor adiabatically from 150kPa and 400K to 1000K and 600kPa. It enters the air compressor with a mass flow rate of 1kg/s. Determine the rate of entropy produced during the process in ??j/(s*k)

please answer both questions

the ones that are posted are wrong

In: Mechanical Engineering

(A)
car has a length of 6m and is travelling at speed of 95km/hr. What
is its Reynolds number?(5s.f , tolerance +/-500)

(B) for Concorde SST plane, how far could it actually glide in
km?(3s.f), (has lift/drag ratio of 6:2, engines failed at altitude
of 17500m and can make it to airport 106km away)

In: Mechanical Engineering

Cast-cobalt alloys quite common in manufacturing industry. Describe in details about it.

In: Mechanical Engineering

Can you write essay with 300-450 words related to these keywords?

1-Lock, 2-Friction force, 3-Friction lining-shoe, 4-Bearing
ring,

5-speed gear wheel, 6-Tangential leaf spring

In: Mechanical Engineering

Hi, please help me with this question.

What does flank wear depend on and why did a tool that machined steel 1020 suffered a flank wear greater than one of the same material that machined 4140 steel or aluminum?

What does crater wear depend on?

If you can give also some resources from which I can find information about the answer.

Thank you very much.

In: Mechanical Engineering

An old wooden telephone pole with a single cross member was blown off center during a recent storm. To temporarily stabilize the telephone pole, a repair crew has attached a cable from the end of the cross member to an eye-ring stake anchored in the ground. (Figure 3) If the origin O of a coordinate system is placed where the pole meets the ground, the point where the cross member is attached to the pole is A(−2.00,1.80,23.4)ft and the point where the cable is attached to the end of the cross member is B(−2.00,−3.20,26.4)ft. The cable's direction is {1.00i−1.00j−1.00k} and it has a tension of 195 lb . What is Ma, the moment that tends to twist the telephone pole due to the tension in the cable applied at point B?

In: Mechanical Engineering

What are the weakneses of the following forces in modeling the piston:

1-Constant force

2- linear

3-1/2 sin wave

In: Mechanical Engineering

Refrigerant-134a enters an adiabatic compressor as saturated
vapor at 160 kPa at a rate of 2.8 m^{3}/min and is
compressed to a pressure of 900 kPa. Determine the minimum power
that must be supplied to the compressor. Use the tables for
R-134a.

The minimum power that must be supplied to the compressor

In: Mechanical Engineering