use matlab to create a function that finds inverse of 2x2 matrix and returns result. Should be a error check to make sure matrix is 2x2, and nonsingular.

Dispute the Kolmogorov scale in turbulence.

Prove that Kolmogorov was wrong.

create a function in matlab that sums two m x n matrices using nested loops, then returns result into a new matrix. Use nesed for loops to add matrices piece by piece. Basically means, dont program simply A+B

Function should perform error check to make sure both matrices have same number of rows/ columns.

1 – What is the mechanism of UV aging of polymeric materials? 2 – Why the mechanical properties of polymers varies with processing technique? 3 – How the dynamic friction of composite depends on the filler’s nature?

1. If you suspect that the vehicle tends to oversteer in a corner, which sensors readings would you check to confirm your suspicions?

2. While on a road course, the first driver consistently achieves a lap time of 1 min 23 seconds while the second driver achieves a lap time of 1 min 45 seconds. As the race engineer, how would you coach the second driver to translate logged data into future ontrack gains? Hint: Assume you have a GPS (!), along with the usual other sensors. How can you overlay the data of both drivers, so you can compare their strengths and weaknesses?

3. With regards to data pulled from sensors, is the data always accurate? Can it be trusted to properly setup the vehicle?

4. True or False (If false please explain why) - Vehicle setup is solely dependent on the race engineer regardless of driver input because the race engineer can fully optimize the vehicle based on sensor data.

5. True or False (If false please explain why) - Sensor data should be logged during every session and compared with the engineers set up sheet, engineer’s notes, and driver’s notes during debriefing, to assess the effects of any changes done to the vehicle.

The following informaiton is not a question; it is just some extra background information.

some of the sensors that are being discussed are Hall Effect Sensors, Wheel Speed Sensor, Steering Angle Sensor, GPS, Linear Potentiometer, Wheel Speed Sensor, and a Steering Angle Sensor.

Some Sensor Functions...

Shock Travel Sensors - will be used to measure shock travel distance as well as shock speed. The motion is also important for determining proper shock damping rates. A shock should never be fully compressed, eliminating damping potential, which can result in the vehicle becoming unsettled and/or damaged. Based on shock travel data, vehicle status can be evaluated and adjusted to enhance performance. For example, if the vehicle continues to bounce up and down a number of times after the initial impact to the shocks, then it is likely that the vehicle is underdamped, and spring and damping rates can be adjusted.

Wheel Speed Sensor - measures revolutions per minute (RPM) and can be used as a tachometer. Hall effect sensors are a common type of wheel speed sensor.

GPS - can be used to measure absolute speed, the vehicle track position (racing line), and lap timing during road racing. The position information can be used in MoTeC's i2 data analysis software to show and compare the driven lines by each driver as well as create track maps. Additionally, a GPS unit can be a cost-effective alternative to the traditional lap timing system. GPS is a useful tool to help with driver learning. Since the position and speed are tracked, the race engineer can calculate the optimum position for the driver to begin braking, or where to start a turn to allow for the fasted lap time. And when debriefing the driver, it can be used to show where the driver needs to make improvements.

Accelerometer - the MoTeC C185 Display has a built-in 3-axis accelerometer, which measures acceleration in the x-y-z directions; however, it is located in the vehicle dash, not at the vehicle Cg. To simplify the analysis, we will pretend that the accelerometer data is located at the Cg for purposes of this course. The sensors are oriented to measure the lateral and longitudinal accelerations of the vehicle, such as in a turn or during acceleration or braking.

Steering Angle - measured in degrees, is recorded to better understand how the vehicle is reacting to driver inputs. For example, while in a turn, if the steering angle sharply rotates into a counter steer situation it is likely that the vehicle began to oversteer. The steering angle sensor fits into the end of a slotted steering shaft at the steering rack. - TPS (Throttle Position Sensor) - this mounted directly to the rotational shaft of the butterfly valve on the throttle body. It measures the rotation of the throttle body in degrees that is then read by the ECU and recorded for future analysis.

*Engine Speed (RPM) - measures the speed of the crankshaft of the vehicle and relays the information to the MoTeC dash unit. Engine speed is used to remain in peak power areas for the engine (around 11,000 RPM) as well as protecting the engine from damage of over revving the engine.

*Gear Position - determines what gear the vehicle is in and can be displayed for the driver. This eliminates any confusion of what gear the vehicle is in at a given time. This is especially helpful for sequential gearboxes, such as in the formula car, for knowing which gear the vehicle is in. Unlike traditional H pattern gearboxes, the shift lever reverts back to its original position after every shift and without a gear position sensor, the driver would be tasked with correctly counting which gear the vehicle is in. On the FSAE car, neutral is located between first and second gear. Therefore, the shift lever is pushed forward to select first gear, then pulled rearward to select 2nd through 6th gear.

Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a
velocity of 37 m/s and exits at 1.2 bar with a velocity of 460 m/s. For steady-state
operation, and neglecting potential energy effects, determine the exit
temperature, in °C.

What are the steps in producing a concrete slab on grade?

Answer the following

a)State any advantages or disadvantages you see in measuring vibrations with a strain gauge as opposed to the other methods we have used. What effect would changes in temperature have on strain gauge readings and is it possible to eliminate this effect? It was briefly mentioned that different bridge configurations can eliminate temperature effects, but what are those effects and how does that work?

b)In order to get the most accurate readings, should a strain gauge have a high stiffness or a low stiffness? Explain.

Concurrent Engineering is a work methodology based on the parallelization of tasks.

Write a short essay (750 words or more) on Concurrent Engineering as part of the product designing process. Your essay should discuss and explain the concept of Concurrent Engineering, in addition to relevant points such as, FOR EXAMPLE:

• Why it is important to set ‘Concurrent Engineering’ during design?

• How does this approach work (for a given generic product)?

• What are the benefits and drawbacks of Concurrent Engineering?

• Other points as well, provide your own input..

The essay should be prepared in a neat format that comprises:

• Attempt this assignment individually.

• Do not copy from your peers, any similar submissions will be nullified • A cover page (with your name and ID number included).

• A short introduction paragraph(s).

• Main text answer referring to course materials.

• Evidence of further free reading from library and peer-reviewed resources (suitable number of references from books and scientific articles).

• Tables, figures, and illustrations whenever needed to further support your answer, and make it more clear, strong, and appealing.

• A short conclusion paragraph(s)

• List of references at end of essay.

• Total number of words at end of essay (does not include references and cover page)

FLUID MECHANICS

The viscosity of water at 20⁰C (68⁰F) is 1.008 cp (centipoises). (A) Compute the absolute viscosity in lb-sec/ft² . (B) If the specific gravity at 20⁰C is 0.998, compute the kinematic viscosity in ft²/sec.

Use:
1 poise = 1 dyne-sec/cm²
1 lb = 444,800 dynes
1 ft = 30.48 cm

(Please provide a brief step explanation since a solution has been already provided, but it isn't clear how they arrived at the final solution. Thank you!)

Using this sample matlab code:

clear all;
clc
A= ????????;
B= ????????;
AUG=[A B];
for L=1:size(A,2)
%Pivoting starts
for k=L:size(AUG,1)
for m=k+1:size(AUG,1)
if abs(AUG(k,L))<abs(AUG(m,L))
temp=AUG(m,:);
AUG(m,:)=?????????;
AUG(k,:)=?????????;
end
end
end
%Pivoting ends
%Gauss Elimination starts
for k=L+1:size(AUG,1)
AUG(k,:)= ????????????????????????????;
AA=AUG(:,1:size(A,2))
BB=AUG(:,size(A,2)+1:end)
end
%Gauss Elimination ends
end

b)Write a MATLAB M-file which performs gauss elimination without pivoting step by step and shows the coefficient matrix in each step. Using cond (X, P) calculate the condition number of the final step coefficient matrix (U matrix).

c) Write a MATLAB M-file which performs gauss elimination with pivoting step by step and shows the coefficient matrix in each step.

d)Using cond (X, P) calculate the condition number of the final step coefficient matrix (U matrix).

A list paragraph is preferable for engineers as it doesn’t require paragraph features as much as text block paragraphs do.

True or False

Atmospheric air enters the heated section of a circular tube at a flow rate of .005 kg/s and a temperature of 20 degrees Celsius. The tube is of diameter D = 50 mm, and fully developed conditions with h = 25 W/m^2K exist over the entire length of L = 3m.

a) For the case of the uniform surface heat flux at q''_s = 1000 W/m² , determine the total heat transfer rate q and the mean temperature of the air leaving the tube T_m,o. What is the value of the surface temperature at the tube inlet T_s,i and the outlet T_s,o? Sketch the axial variation of T_s and T_m. On the same figure, also sketch (qualitatively) the axial variation of T_s and T_m for the more realistic case in which the local convection coefficient varies with x.

b) If the surface heat flux varies linearly with x, such that q''_s(W/m²) = 500x(m), what are the values of q, T_m,o, T_s,i, and T_s,o? Sketch the axial variation of T_s and T_m. On the same figure, also sketch (qualitatively) the axial variation of T_s and T_m for the more realistic case in which the local convection coefficient varies with x.

c) For the two heating conditions of parts (a) and (b), plot the mean fluid and surface temperatures, T_m(x) and T_s(x), respectively, as functions of distance along the tuble. What effect will a fourfold increase in the convection coefficient have on the temperature distributions?

d) For each type of heating process, what heat fluxes are required to achieve an air outlet temperature of 125 degrees Celsius? Plot the temperature distributions.

List 4 issues that need to be considered when selecting a factor of safety in an

engineering design.

2-

What is the difference between yield strength and ultimate tensile strength of a material?

1. Figure 21.4 provides suggested cutting speeds and feeds for turn- ing. You are cutting a wrought carbon steel (1012) at normalized to 100 Bhn and have have selected a high speed steel tool. For a DOC of 150 in., What speed and feed would you select?

2. For problem 1, suppose you selected a speed of 145 sfpm and a feed of 0.015 in. per revolution. The workpiece is 4 in. in diameter.

a. What is the input rpm? b. What is the MRR? c. What is the cutting time for a 6-in. cut?

Only question 2 please.. if you need more info please let me know