Problem 5: A total of 6 measurements are made of the mass of an injected molded part. The measurements are: [2.68 kg 2.66 kg 2.16 kg 2.12 kg 2.50 kg 2.96 kg] a) Determine the average mass based on the measurements. (5 points) b) Determine the uncertainty in the mass at a 95% confidence interval based on the measurements. (10 points) c) Determine the uncertainty in the estimated mean at a 95% confidence interval based on the measurements. (5 points) d) Determine the 95% confidence interval for the true standard deviation value based on the measurements. (10 points)

3. a) Write a script to prompt the user for the length and width of a rectangle, and print its area with two decimal places. Put comments in the script. b) Convert the script in part (a) to a function.

which grade of steele example steel 304,316, 321,202, is suitable and easy drilled? please give right answer

A finite wing area of 1.5 ft2 and aspect ratio of 6 is tested in a subsonic wind tunnel at a velocity of 190 ft/s at standard sea-level conditions. At an angle of attack of ?1°, the measured lift and drag are 0 and 0.181 lb, respectively. At an angle of attack of 2°, the lift and drag are measured as 5.0 and 0.23 lb, respectively. Calculate the span efficiency factor and the infinite-wing lift slope. (Round the final answers to four decimal places.)

1) The span efficiency factor, e, is ________ .

2) The infinite-wing lift slope is _______ per degree.

Design for Sustainability (DFS) is a DFX emphasis on sustainability, meaning that the primary design emphasis is on minimizing the negative or adverse impacts of production, usually with respect to ecology, but also on economy and society. Give two examples of ways that Design For Additive Manufacturing (DFAM) could also accomplish some of the goals of DFS.

Describe the steps you would use to create a circular pattern of holes in a part (*.ipt) in Autodesk Inventor Professional 2016.

Describe the process you use to use to prepare a *.stl file for processing by Slic3r. What considerations should you address with respect to object position?

Why is systematic file naming important for interacting with the Taz 3D printer using the “print from SD Card” command?

Explain why simplicity is an important factor in design

Describe two examples of automation technology that contributed to the development of additive manufacturing and why additive manufacturing would not be possible without that technology.

Design for X (DFX) is a design philosophy that emphasizes a single characteristic of a new product that will guide all of the decisions in the design of that object. What makes this a powerful strategy?

Describe two characteristics that assist with successful 3D printing that should be present in an object designed using Design For Additive Manufacturing (DFAM) as a guiding philosophy? (for example: having one large flat side that can adhere to a build plate)

Of the following: Design for Cost, Design for Reliability, or Design for Manufacturability, which is most compatible with production by additive manufacturing. Which characteristics of additive manufacturing contribute to that compatibility? why?

1.Write down the fplot( ) command used to generate a straight line formed by two (x, y) points: (-3, 5) and (3, 8). Plot the line from -5 ≤ x ≤ 5. Show your derivation of the line equation.

2. [15pts] The position x as a function of time of a particle that moves along a straight line is given by

a. [3pts] Derive the expressions for the velocity and acceleration of the particle

Make plots of the position, velocity, and acceleration as a functions of time for 0 ≤ t ≤ 15 sec following the instructions below.

b. [6pts] Using plot( ), plot the position, velocity, and acceleration on a single plot window using black solid line, green dash line, and yellow dash-dot line, respectively. Show the plot in Figure 1. Use the line width of 2. Include the following title in bold face: “Motion profile of a particle between 0 ≤ t ≤ 15 sec”. Include proper legend and axis labels with units. Show grid lines. All formatting must be done inside your code and not from the Figure Editor.

c. [6pts] Using subplot, plot the position, velocity, and acceleration vs time in 3 separate plots arranged in a single column. Show the subplot in Figure 2. Include the following title in bold face above the top-most plot: “Position, velocity and acceleration profile of a particle”. Show grid lines and proper axis labels on all your plots. All formatting must be done inside your code and not from the Figure Editor.

From the diameter and effective surface temperature of the sun, estimate the rate at which it emits energy. What fraction of this emitted energy is intercepted by the earth? Estimate the solar constant, given the mean earth-sun distance.

Problem 2.

Problem 1.

An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9 MPa.
The reheat temperature (state 3) is also  475ºC.  
The condenser pressure is 8 kPa, and the water exits as a saturated liquid

Find: (a) The heat addition to the cycle, (b) the consumption rate of U-235 to maintain the heat addition if this is a nuclear power plant, and (c) the consumption rate of natural gas to maintain the cycle

Problem 2.

Re-do problem 1 using an isentropic efficiency of 80% for both stages of the turbine and the pump

An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9 MPa.
The reheat temperature (state 3) is also  475ºC.  
The condenser pressure is 8 kPa, and the water exits as a saturated liquid

Find: (a) The heat addition to the cycle, (b) the consumption rate of U-235 to maintain the heat addition if this is a nuclear power plant, and (c) the consumption rate of natural gas to maintain the cycle

An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9 MPa.
The reheat temperature (state 3) is also  475ºC.  
The condenser pressure is 8 kPa, and the water exits as a saturated liquid

Find: (a) The heat addition to the cycle, (b) the consumption rate of U-235 to maintain the heat addition if this is a nuclear power plant, and (c) the consumption rate of natural gas to maintain the cycle

3. Upper bike price is $4600, middle bikes price is 10,000. Describe which is the best value for you as a student and why. Identify the critical path on the FAST diagram.

4. Genichi Taguchi defined the taguchi loss Function: Explain what the Taguchi Loss Function means for both the consumer and Manufacturer

As part of a mechanical device there is a circular cog, Cog1, that has a diameter of 50 cm. From the mechanic’s point of view, when the device is in action, Cog1 rotates anticlockwise and makes two full turns per minute. There is a red marker on Cog1 to help track this motion.

(a) Consider only the placement of the red marker on Cog1. It is defined by two variables, X and Y . X is the horizontal displacement from the vertical line through the center of Cog1 and Y is the vertical displacement from the horizontal line through the center of Cog1. Let θ be the angle from the positive horizontal axis to the line between the center of C og1 and the red marker. Assume θ is measured anticlockwise and in radians.

(i) Sketch a representation of this situation.

(ii) Let the red marker begin at θ = 0. Sketch the graphs X(θ) and Y (θ); the horizontal and vertical position of the red marker as functions of θ, as the marker rotates. Clearly label the axes, the maximums and minimums of the functions, and any points where the graphs cross the axes.

(iii) Give explicit expressions for X(θ) and Y (θ).