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14:540:492 : Assignment 1_IntRe_Truc Hoang

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tth99
23 Aug 2022
School
Rutgers University
Department
Industrial and Systems Engineering
Course
14:540:492
Professor
E.A.Elsayed

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Document Summary

Assignment 1: two mse (materials science and engineering) students invented materials with yield strengths shown in columns b and c in the attached excel sheet (these are the yield strength of 100 samples from each type of material). Each inventor claims that his/her material is superior to the other. They approached a civil engineering student to assess the use of these materials for column support of a static structure. One hundred observations of the potential stress are recorded in column a in the attached excel sheet: the observations in column a represent applied stress and observations in columns b and. C represent the strength of the two materials. Also, assume that all observations follow normal distributions. Determine the probability of failure and which material is preferred. Use matlab and excel to perform the analysis. (excel method attached to another excel file) Denote that a, b, and c are the data for applied stress, the strength of two materials respectively.

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Related Questions

Diffusion Lab
Overview:
In this lab you will investigate how molecules transport in a cell through diffusion and osmosis. You will observe both diffusion and osmosis using an egg and three different substances. You will write a hypothesis, perform an experiment, record observations, collect data, and answer questions after the lab. Below you will find the materials needed for the lab, the procedure for conducting the lab, and a sample layout for your lab notebook page.
Background Information:
The cell membrane surrounds every cell and is the organelle that regulates what moves into and out of a cell. They are selectively permeable which means they only allow certain things to move across the membrane.
Diffusion is the movement of molecules from a high concentration to a low concentration. It is a type of passive transport meaning that it does not require energy from the cell.
Osmosis is the process where water molecules diffuse across the cell membrane from an area of high concentration to an area of low concentration.
For the Lab:
This lab should be done over four consecutive days. You will need to obtain these materials. You should create a lab notebook page to record your hypothesis, observations, and write your conclusions. You can create the notebook page on paper or on a computer.
Materials:
  •  1 raw egg
  •  Container that will hold 2 cups or more (It should be large enough to fully submerge the egg in a liquid)
  •  Tape measure
  •  Vinegar
  •  Corn syrup
  •  Distilled water
  •  Plastic Wrap
Note: Nothing in this lab should harm you, but be careful and ask for help if you need it. Wash your hands every time after you handle the egg and clean your lab area after each day. If you need assistance get adult supervision.
 
Lab Procedure:
Start by writing a hypothesis to answer the following experiment question: Make sure the hypothesis is in the "if, then" format.
 
What happens to a raw egg when it is covered first in vinegar, then corn syrup, and then distilled water?
 
Perform the experiment over 4 consecutive days at about the same time each day. Below you will find instructions for each day:
Day 1:
1. Measure the egg's circumference in centimeters using the tape measure. Record the measurement on the observation table.
2. Record any "before" observations about the egg's appearance (color, shape, texture, size).
3. Carefully place the egg in the container and add vinegar until the egg is fully covered.
4. Cover the container with plastic wrap and leave overnight.
Day 2:
1. Very carefully take the egg out of the vinegar and dry it off.
2. Measure the egg's circumference using the tape measure. Record the measurement on your observation table.
3. Record any "after" observations on your observation table.
4. Clean out the container with soap and water and place the egg back in the container.
5. Add corn syrup until the egg is fully covered. Record any "before" observations on your observation table.
6. Cover with plastic wrap and leave overnight.
Day 3:
1. Repeat steps 1-4 from Day 2 .
2. Add distilled water to the container until the egg is fully covered. Record any "before" observations on your observation table.
3. Cover with plastic wrap and leave overnight.
Day 4:
1. Repeat steps 1-3 from Day 2 .
2. Clean the container and throw away the egg.
When recording the circumference of the egg do so in centimeters. Your observations should describe the appearance of the egg and any other important facts you notice. Look at the color, size, shape, texture and anything that changes about the egg throughout the experiment.
 
Below is a sample of how to set up your lab page to record your experimental data. You should leave as much space as needed for each part.
Sample Lab Notebook Setup:
Diffusion Lab
Hypothesis:
Observation Table
 
Post-Lab Questions:
1.Describe what happened to the egg after soaking it in vinegar for 24 hours.
2.Describe what happened to the egg after soaking it in corn syrup for 24 hours.
3.Describe what happened to the egg after soaking it in the distilled water for 24 hours.
4.How did you see diffusion and osmosis in this lab?
Fill in the chart as you go through the experiment. When done with the experiment answer the post lab questions. Submit your lab page with your observations and answers to the post-lab questions. You can submit either a picture of your work or upload a document.
Things to remember:
  •  Qualitative observations describe appearance (color, texture, shape, size, smell, etc.)
  •  The variables in this lab are vinegar, corn syrup, and distilled water.
  •  The controlled variables are the egg, beaker, and the time the egg is exposed to each substance.
  •  The independent variable is the substance the egg is submerged in (vinegar, corn syrup, and distilled water).
  •  The dependent variable is what happens to the egg after being exposed to the three different substances.
Biology Special Lesson: Diffusion Lab
This rubric is an outline of how the lab information you submit will be graded.
Grading Rubric
Overview:
In this assignment you will be creating a model or replica of an animal cell or plant cell. This can be done in many different ways and you are encouraged to be creative. Below you will find a list of what you must do and include in this project as well as a grading rubric for your final submission.
Project:
Your project is to create a model or replica of a plant or animal cell. This can be done using, materials that you have at home. Feel free to be creative in how you represent each aspect of the cell. You can use craft materials, candy, food, or any other materials you have access to.
Your model will need to include the cell type you chose and all of its major organelles. Each part, of the cell should have a unique visual representation. Your model must include a label for every. part of the cell or a separate key that describes how each organelle is represented. You will also describe the purpose or function of each organelle. This can be done on a separate piece of paper and can be written in an essay format or as a list.
 
Depending on the cell type you choose, you will need to include all of the following organelles:
  • Cell Wall (Plant cell only)
  • Cell Membrane
  • Nucleus (with DNA)
  • Nuclear Membrane
  • Endoplasmic Reticulum (smooth and rough)
  • Ribosomes
  • Mitochondria
  • Golgi Body
  • Lysosomes (Animal cell only)
  • Vacuoles
  • Chloroplasts (Plant cell only)
Submission:
You will submit this project as a picture of your model and descriptions of the organelles.
Biology Special Lesson: Make a Cell
 
Grading Rubric
Make a Cell Project
Overview:
In this assignment you will be creating a model or replica of an animal cell or plant cell. This can be done in many different ways and you are encouraged to be creative. Below you will find a list of what you must do and include in this project as well as a grading rubric for your final submission.
Project:
Your project is to create a model or replica of a plant or animal cell. This can be done using materials that you have at home. Feel free to be creative in how you represent each aspect of the cell. You can use craft materials, candy, food, or any other materials you have access to.
Your model will need to include the cell type you chose and all of its major organelles. Each part of the cell should have a unique visual representation. Your model must include a label for every part of the cell or a separate key that describes how each organelle is represented. You will also describe the purpose or function of each organelle. This can be done on a separate piece of paper and can be written in an essay format or as a list.
 
Depending on the cell type you choose, you will need to include all of the following organelles:
  •  Cell Wall (Plant cell only)
  •  Cell Membrane
  •  Nucleus (with DNA)
  •  Nuclear Membrane
  •  Endoplasmic Reticulum (smooth and rough)
  •  Ribosomes
  •  Mitochondria
  •  Golgi Body
  •  Lysosomes (Animal cell only)
  •  Vacuoles
  •  Chloroplasts (Plant cell only)
Submission:
You will submit this project as a picture of your model and descriptions of the organelles.