Engineering Blog Post #4

 

In theory, the solar oven should work. This is due to the solar energy being reflected off the tin foil and being absorbed into the black paper. From there it is converted into thermal energy then to chemical energy as the cooking process starts. Also, due to it’s “concave” interior shape, we can even notice a convection current which also helps the cooking process. The convection current is an example of heat transfer.

I think that the most successful area of this project was the amount of time and focus I took on exact measurements and planning, like most projects I work I generally rush to the building process. I think one area I could grow from is trying to prioritize certain aspects of the building process. There were definitely some parts of the oven that could be modified if I had the time to.

The oven is relatively light and portable and can be packed in a bag if needed. I think this product would most likely target campers who have time to multitask. Also, many foods consumed by campers are smaller in portion, so they are easier to cook in the small oven.

Engineering project post #3

Through building the box, I’ve learned how essential measurements are. At the beginning of the project. There were plenty of times where one cut might’ve been one centimeter off my original dimensions, and I had to re-cut all my pieces of cardboard. I also edited my prototypes through peer feedback. Some people suggested that I make a “stand” for the aluminum covered flap for the oven to be easier to use.

Engineering project blog post #2

The diagram that I drew is loosely based off my initial research:

Next class I will begin constructing my cardboard pizza box. I elected to build my own box because, with my own oven, I get to control the measurements and variables of the project. When considering the size of the box, the process is similar to that of seasoning soup before simmering versus after simmering. If you season the soup before it simmers, you don’t have control over the taste of the soup. The flavors of the soup might change through the cooking process, which might lead to an over-salted soup if you seasoned it beforehand. In building the pizza box, I can only go forward, not back. Making the pizza box may take up half of a class, from there I can begin laying out the aluminum foil and black construction paper. That process will take 1 1/2 to 2 classes. Depending on how much time I still have, I will be testing and changing my prototype with the remaining time.

Engineering Project Blog post #1

Blog post #1: Define and Inquire

What is this engineering task?

What are you thinking about doing? (this can be multiple ideas)

Embed images and links of ideas you like/don’t like

ANALYZE those ideas: What are the pros/cons about those ideas?

I want to focus on a project that shows energy transfer and conversion. One of the first ideas that I have come across is a windmill. 

For this project, I’ll need a motor, hot glue gun, paper cup, popsicle sticks, and paper. This project shows how electrical energy gets converted into kinetic energy.

I’ve also found another project that involves thermal energy transfer. It also shows insulators and absorbers.

https://www.education.com/science-fair/article/design-solar-cooker/

The materials I need are:

  • Cardboard pizza box
  • Pencil
  • Ruler
  • Box cutter or scissors
  • Aluminum foil
  • Clear type of tape
  • Black construction paper
  • Plastic wrap or large, transparent plastic bag
  • Newspapers

 

Update:

I need to find an alternative to a pizza box (I generally don’t order pizza, and most boxes might already be extremely greasy from the pizza itself.)

 

 

https://www.leaf.tv/articles/how-to-make-pizza-boxes/

 

Tips for cardboard:

https://www.instructables.com/id/Pro-Tips-for-Using-Cardboard/

 

 

Plotting a New Point in My Learning Curve: Parabolas

      

The project we have been working on for the past few weeks has been on quadratics and parabolas. In this project, we built our own catapults and launched ping pong balls from them. We used Logger Pro to analyze the video of our catapult and wrote our Height vs. Time equation from it. Using that equation, we then proceeded to convert it into a Height vs. Distance function.

The most challenging part of the project was probably converting the equations. Most of our numbers were not whole numbers and were long decimals such as 0.1002. But I think that this step in the project was extremely pivotal because we were finally able to apply our learning to a real-world situation with random numbers. I think one of the most important learnings from this project was not only how to solve quadratics and draw parabolas, but also to understand that parabolas are used almost every day. This project helped my understanding of quadratics by putting me in a situation where the numbers are not already set. In this situation, I had to find the numbers myself and crunch them. I think next time I would try to do the equations more solidly and focus more on them. The equations are really one of the most important parts of the project and I think I overlooked it.

 

 

 

Polymer Project Journal #4

Prototype Observations

Prototype Observations Strengths for this Prototype Limitations for this Prototype
Mark I:

 

18.3 g of glue

 

Super slime recipe

 

5 ml of borax.

 

Needs to be more stretchy

Not sticky enough

Really brittle

Durable Has to be stretched slowly
Mark II:

29.3g of glue

 

9ml of borax

 

20 ml of PVA

 

Too sticky

 

Increased elasticity

Again, durable Extremely sticky
Mark III:

40ml of PVA

 

51g of glue

 

20 ml of borax

 

5g of guar gum

 

10 ml of liquid starch

 

 

Wasn’t stretchy enough

 

Needs a bit more stickiness

 

Brittle

Durable

 

Thick

 

Not as sticky as Mark II nor Mark I

 

Stringy

Too thick
Mark IV:

 

73.9 g glue

 

1.2g of guar gum

 

40ml of PVA

 

20 ml of Borax

 

10ml of Liquid Starch

 

Brittle

 

Good elasticity

 

 

Durable

 

Good elasticity

 

“Gloop” like qualities

 

dough like, slight adhesiveness,

 

 

If pulled apart quickly, it would break.

 

 

 

 

 

 

 

 

 

 

Mark V:

 

73.9 g glue

 

40ml of PVA

 

20 ml of Borax

 

1.2g of gelatin

 

1.2g of guar gum

 

10ml of Liquid Starch

 

 

“Sweaty hand” like features

 

Not sticky, however wet

Bouncy

 

Stretchable in small quantities

 

Not easily broken if pressured is applied.

Jell-O like qualities makes it break quickly when pulled apart. Not sticky enough to be put back together

 

 

Prototype Claim

Use evidence from above observations to complete.

 

Prototype # 4, called MA-A4, was most effective for meeting our goal because: it had the best qualities and was well rounded. The qualities of the polymer suited our needs for product. Its Gloop like qualities allowed it to be stuck on to a pliable surface. It was stickier than Mark II and Mark III but more elastic and squishier than Mark V.

 

 

 

 

 

 

 

 

 

 

 

Method of Final Design

Give a summary of how your final product will be made.

Make sure you list the steps and amounts used.

 

 

  1. Add 73.9 grams of glue into a cup
  2. Measure 40 ml of PVA solution and add to the same cup
  3. Measure 20 ml of borax and add to the cup
  4. Stir with spoon to combine
  5. Next combine 1.2 grams of guar gum to the mixture
  6. Mix the slime until too thick to mix
  7. Add 10 ml of Liquid Starch to the mix and stir well
  8. Lay the slime onto a clean flat surface and continue to knead until not slippery or too sticky
  9. If needed put the slime under tap water for a couple seconds and pat dry with a towel.
  10. Apply onto any object and make sure it sticks well before using.

 

 

 

Reflection

What was the process like?  What was challenging?  What was interesting?  What did I learn?

 

The design process for this project was the most challenging part of the project for me. For my group, the slime took lots of time to make and any change in quantities could modify the result of the slime. I think what was most interesting was how we could apply this knowledge from the slimes to learn more about chemistry and how polymers work.

 

Infomercial is below:

 

 

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Polymer Journal #3

Describing Our Polymer

  1. We are making a polymer that can replace bubble wrap and can double as a pliable surface for fragile goods.

 

  1. We want the Physical Properties to include:
  • Stretchable
  • Durable
  • Odorless
  • Shapeable
  • Not adhesive

  

Our Plan to Develop our Prototype

*Prototype = sample or model

1st we will…                                                 

Research and test the physical characteristics of different base polymers.  

    2nd we will…

Find the perfect combination of base polymers and other materials for our polymer. 

    3rd we will…

Test our product and change any ratios of materials if needed. List all problems of the polymer.

     Then we will…

Present to the Dream On panel.

Our Method for Testing our Prototype: How we’ll test it to see if it works

Method Why we chose this/How this will be effective
Drop test (With a soda can see if the can will be dented upon impact) If the can becomes dented it will be safe to assume that a phone or computer will crack too.
Adhesive test We will see if two separate products will stick together
Temperature test To see if the polymer is affected by temperature.

 

Polymer Journal #2

Our Specific Goal:

The goal of our polymer project is to create a reusable polymer that is stretchy and durable that can be a replacement for packaging bubbles and can double for a phone case.

Target Market Audience

  Target Market Audience How will this help them?
Target Market Audience #1:

 

Everyone It will be a material that can be applied to anything that is fragile.
Possible Target Market Audience #2:

*just in case you have more than one target market audience

Moving companies. It will be a suitable replacement for bubble wrap. It’s also reusable.

 

Using Observations of Base Polymers

 

*Gloop, Super Slime, Boogers, Oobleck, Goobers

 

Polymer Characteristics We Like for Our Polymer Why this is important
Gloop Stretchy applicable over an extended range.  
Super Slime Squishy Comfortable
Boogers Sticky Allows for someone to grasp it.
Oobleck Durable Won’t break
Goobers N/A  

 

“AIR” + “ENERGY”+ “RENEWABLE” —–> “SAVE THE WORLD”

The issue I would like to focus on is the issue of renewable energy and how CO2 emissions affect our air quality. I currently believe that China’s primary source of energy comes from burning coal. However, the burning of coal creates pollution. I also think that Germany is doing a great job currently in using renewable sources and we should model what they are doing. Germany is already dubbed as the “the world’s first major renewable energy economy.” Renewable energy is affordable, cleaner, and is going to be better for the environment.

How will the reduction of Co2 emissions (switching to renewable energy) affect the economy of China? Will the pros of the switch outweigh the cons? What measures will the government take?

I fear that I may not have the correct information or solutions. I also worry that I may be too naive and that I don’t understand the significant impacts of suddenly switching to a new source of energy.

I hope to gain an outlook on how some small changes can really affect a big country. I also want to learn more about renewable energy sources.

I hope to spread awareness that pollution really affects our lives. That some toxins in the air are already 20 times the limit. That our actions can save us and our future.

I would appreciate your feedback to know if my question is too broad or if there are any ideas I am not covering.

“Life, Liberty, and the Pursuit of Happiness”

He was a man in his early forties, specks of grey hairs sprouting out of the sides of his head. He sat alone at his desk by candlelight, as he pulled out an old worn out a journal with the name, “GEORGE H. JACKSON” engraved on it. Slowly, with his wrinkled hands, he shakily grabs the book and guides it to the light. But then he retracts from the candle and lays the book on his desktop. He opens the journal dives back into his youth.

The question behind every revolution is what changed and stayed the same. Quite honestly, pretty much everything remained the same after the American revolution. We went from rich white guys running the show all the way to rich white guys running the show. Slavery was still in place, and it became even more significant in the Southern states. Treatment of Native Americans mostly remained the same. They were often prosecuted, and those who sided with the British had their villages burnt. Wealthy landowners and merchants still dominated society and politics. Even though women helped a lot to win the Revolution, the war never really changed the roles of women. They were always considered wards of their husbands or saleable assets of their fathers, and they didn’t gain personal rights.

 

 

What was revolutionary were the ideas. These ideas can be summed up in one of the sentences of the Declaration of Independence: “We hold these truths to be self-evident, that all men are created equal, that they are endowed by their creator with certain inalienable rights and that among these are life, liberty, and the pursuit of happiness.” The ideology of “all men are equal” was not initially shown as there were still slaves in use, it, later on, it presented itself in our American culture. The revolution also profoundly changed the economy. We also began to see the notion that all Americans where equal, that birth didn’t decide what job you got or your status in society. Now, you had the chance to work your way up and become wealthy. There was no significant social or financial gap in society.  With this new country, all men and women worked their fair share and earned their keep. With this idea, it not only profoundly shaped America but also began to mold revolutions and ideas for the rest of the world we know today.