As a lubricant engineer, you design a new friction modifier as an additive for synthetic oil to reduce friction between two surfaces. Describe the content of your new friction modifier and mechanism to protect the surface.

For the stress data given below with the nearest error of 1:

27-17-11-24-36-13-29-22-18

23-30-12-46-17-32-48-11-18

18-32-26-24-38-24-15-13-13

18-21-27-20-16-15-37-19-19

a) Construct a frequency distribution table.

b) Construct the three types of statistical graphs.

c) Determine the (1) Mean, (2) Median, (3) Mode, (4) Range,

Variance, and (6) Standard Deviation.

Ai inventor proposes a four -stroke cycle running on helium. The engine has a compression ratio of 8 and maximum operating temperature of 1,500 K. The atmospheric conditions are temperature of 300 K and pressure of 100 kPa. The processes can be approximated as below:

1- 2 isentropic compression

2- 3 constant volume heat addition

3- 4 isentropic expansion

4- 1 constant pressure heat removal

a.

Plot P-v and T-s diagrams for this cycle.

b.

Determine state conditions at the end of each step by filling up the table below.

c. Heat addition

d. Net work

e. Thermal efficiency

Hint: Cp= 5.193 kJ/kg.K, Cv = 3.116 kJ/kg.K, R = 2.077 kJ/kg.K, k = 1.667

Please show work for all questions a-e. Thank You

Course Title: BUSINESS DYNAMICS: SYSTEM THINKING AND MODELLING FOR A COMPLEX WORLD  

                                Required

What System Dynamics

Meaning of feedback, types, with examples

Please Do it Clearly with each step and FAST

Use music wire to make a series of springs with wire diameters [0.075”, 0.080”, 0.085”, 0.090”].
Each spring should have a free length of 3” and rate of 50 lbf/ft and exactly 20 total coils. The
ends are squared and ground and the load factor of safety should be 1.1.
For each wire size, list the figure of merit and the spring index, C.
All else being equal, which wire diameter makes the most meritorious design?

Flue gases from an incinerator are released to atmosphere using a stack that is 0.62 m in diameter and 10.0 m high. The outer surface of the stack is at 45°C and the surrounding air is at 10°C. Determine the rate of heat transfer from the stack, assuming a. there is no wind and, b. the stack is exposed to 21 km/h winds.

1 A steel helical spring carries a compressive load of 32.4 pounds at a deflection of 0.25 inches. Maximum stress is 73240psi. The spring has 1.5 end turns. Calculate the value of c for the spring of minimum volume material. Calculate the value of d and choose the nearest standard wire diameter for the actual spring. Calculate the corresponding R and the number of active coils N_c. Also, calculate the material in the spring.

An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor as saturated vapor at 6 C and enters a throttling valve as a saturated liquid at 1.2MPa. Assuming the mass flow rate of fluid is 1 kg/sec. 1. The heat received by the fluid (kJ) is 2. The heat received by the surroundings (kJ) is 3. The power input to the compressor (kJ) is 4. The coefficient of performance is

Multiple Choice

1. Which of the following is not used to define a chamfer?

a. Angle and a distance

b. Distance and distance

c. Two angles and a distance

2. Which tool is used to draw a spring?

a. Coil

b. Loft

c. Sweep

3. The Edit Sketch tool can be applied to shapes created with which of the following tools?

a. Extrude

b. Rectangle

c. Revolve

d. Hole

4. The Edit Feature tool can be applied to shapes created with which of the following tools?

a. Circle

b. Line

c. Point, Center Point

d. Extrude

5. Which of the following parameters cannot be used to draw a work plane?

a. Angle to a plane

b. Point and a tangent

c. 3-Point

d. Tangent to face through

6. Which of the following is a material not listed under the Physical tab of the Properties dialog box?

a. Mild Steel

b. Aluminum Bronze

c. Glass

7. Sketched shapes can be projected between work planes using which tool?

a. Sweep

b. Boundary Patch

c. Move Face

d. Project Geometry

8. Which of the following will happen if a work plane is deleted?

a. The work plane will disappear from the screen and all entities will be deleted.

b. The work plane will disappear from the screen and all entities will remain in place.

9. Why are ribs used on molded parts?

a. To increase the part's flexibility

b. To balance the part

c. To increase the part's strength

10. The Face Draft tool is used to

a. Create airflow

b. Create an angled surface

c. Create a current behind a moving object

1. A trapezoid-shaped potato with base lengths of 1.5 cm and 2.0 cm respectively and a height/thickness of 0.5 cm was dried at a temperature of 70 ^oC in a convective oven for 24 h, if the surface temperature of the potato remained at 65 ^oC throughout the drying operation, describe the different changes that occurs during the constant and falling rate periods.

A high performance 4 stroke supercharged gasoline engine is being designed. The target specifications are as follows:

1. IMEP: 25 bar at peak power
2. bsfc:    237 g/kWh
3. isfc:     211 g/kWh
4. Bore to stroke ratio:    1.1
5. Number of cylinders: 4
6. Maximum mean piston speed: 21 m/s
7. Compression ratio: 10.5:1
8. Simulation results indicate that the indicated work per cylinder per cycle needs to be 1550 J/cyl/cyc.

Based on the provided information, finalize the engine design for the following parameters:

1. Bore and stroke (mm)
2. Engine displacement (litre)
3. Engine Speed at peak power (rpm)
4. Peak brake power (kW)
5. Fuel flow rate at peak power (kg/hr)
6. The minimum cylinder volume (cm³)

My device is an AIR COMPRESSOR

Choose the working fluid (substance) for your model device

Choose the inlet substance conditions such as temperature, pressure, velocity, mass flow rate or volume flow rate, quality, etc

Choose the outlet substance conditions based on the available information, or design the outlet conditions based on your research.

DRAW the system you are analyzing, including the SYSTEM BOUNDARY,

Show ALL INTERACTIONS between the system and surroundings on your drawing

Write the Conservation of mass equation as it applies TO YOUR SYSTEM

Write the Conservation of Energy equation as it applies TO YOUR SYSTEM

List all the assumptions and idealizations for the process

Calculate the thermo efficiency of the device. Be sure clearly shows equations, calculation process, intermediate answers/results,and final results. Units are critically important in all calculations.

Please write an introduction about materials absorbing sound.No plagiat please

For ethanol liquid C_5 H_5 O H with 50% excess of air. Determine adiabatic flame temperature

Consider the Rankine power cycle using vapor and liquid.

a: Explain what kinds of problems the Carnot Vapor Cycle has.

b: Draw a T-s diagram for the ideal Rankine cycle and label each process explicitly.

c: There is a method to superheat steam to high temperature in order to improve the efficiency of the ideal Rankine cycle. Explain its advantages and disadvantages explicitly.

d: Name the gas power cycle which uses the same four processes in its cycle and draw the T-s diagram and the P-v diagram for the gas power cycle.