From Horenstein, chapter 3.

Problem solving and idea generation. These designs should pass the “conceptual test”, i.e., after seeing the drawings, the reader can agree prototypes based on these designs will possibly work. A good design should be able to solve at least one anticipated problem.

1.- Develop a method to save energy by reducing or eliminating traffic jams, be specific and include all details. A diagram is required.

2.- Design a method to get high school students interested in science and engineering. Defend your method by including one anticipated problem and explain what and how one or more elements in your design will help overcome it. Details sketches are required.

Logbook and Record Keeping: consult the Horenstein book for examples of a detailed sketch and tolerance table.

3.- Measure the dimensions of an ordinary cell phone with its main groups of keys. Prepare a dimensioned sketch, complete with tolerance table.

Estimation: you can only research for ‘obvious data’ such as the air density, and the number of students in each sections of the freshman English class at UMB. Then show calculations leading to your estimates. These calculations are worth at least 75% of credits.

4.- Estimate the total mass of air that passes through your lungs each day

5.- Estimate the number of books checked out of Healey Library each week

Data Analysis

6.- Provide a method to obtain a ranking for the school districts in Massachusetts from the data on the Massachusetts Government (www.mass.gov) website.

7.- Provide the ranking list for the “top ten” school districts using Excel, defend your results.

LABVIEW: Consult your LabView manual when necessary.

8.- Create a VI that solve the circuit shown. Inputs: V (Battery Voltage) , R1 and R2. Outputs: I (total current) and V2 (Voltage across R2).

All needed formulas: I=V/(R1+R2) ; V2=I*R2 (or V2=V-I*R1). Set V=9V; R1=2 Ohm; R2= 2 Ohm. Run VI. No credit will be awarded without numerical results shown in Front Panel. Include your name and date in a text box in the Front Panel and Block Diagram, and paste a copy of both into your Word file (large pictures will increase file size, so use a moderate size).

Figure for problem 8 Figure for problem 9

9.- Create a VI that solve the circuit shown. Inputs: V (Battery Voltage) , R1 and R2. Outputs: I (total current) and I2 (Current across R2).

All needed formulas: I=V/(R1*R2/(R1+R2)) ; I2=V/R2. Set V=9V; R1=2 Ohm; R2= 2 Ohm. Run VI. No credit will be awarded without numerical results shown in Front Panel. Include your name and date in a text box in the Front Panel and Block Diagram, and paste a copy of both into your Word file (large pictures will increase file size, so use a moderate size).

EXCEL

10.- Import the data (metal distance and ultrasonic response) from http://www.itl.nist.gov/div898/handbook/pmd/section6/pmd631.htm into Excel (it helps to save them into a text file and then use ‘Data/Get External Data/Import text file’ with the ‘fixed width’ option). Produce a non-linear fit with a model different than the exp(-b1*x)/(b2+b3*x) used in CW5 to achieve a smaller ‘standard’ deviation. Plot the data and best fit on a same plot. Then copy the plot into a Word file. State clearly your model and provide Excel values for all the coefficients and also the final ‘standard’ deviation.

Model:___________________

First coefficient:___________ Second coeff.:____________ Third coeff.:______________ Fourth coeff:________________ Fifth coeff (if applicable):_____________

Final standard deviation: __________________

Also provide data obtained from CW5 here:

Model: exp(-b1*x)/(b2+b3*x)

b1=_______________ b2=________________ b3=___________________

Final standard deviation:__________________