Category Archives: Grade 11

Wave Phenomena

Physics 11

Constructive Interference occurs when two troughs or two crests combine together as they travel in opposite directions towards each other, creating a greater combined wave and amplitude when they meet.

Destructive Interference occurs when a trough and a crest meet and combine to work against each other as they travel in opposite directions, which results in them momentarily cancelling out.

Standing Waves occur when the wavelength and the amplitude of the waves are the same as they approach one another, this creates a standing place of energy in the wave. The part of the wave that appears to not be moving is called a node/nodal point.

How do Noise-Cancelling Headphones Work?

Noise-cancelling headphones use destructive interference by taking the surronding sound waves and recreating the exact opposite type of wave allowing the crests and troughs of the sound waves to cancel out. Special material also helps cancel out any extra sound that may be heard.

The Crucible: Peer Pressure – Infographic

English 11

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How have you personally connected to, “The Crucible?”

After reading “The Crucible,” I was able to connect with many of the themes and lessons in the play. Over the course of the last few years of my life, I have experienced several of the different hardships represented in the play such as peer pressure, dishonesty, and religion. Since beginning high school, peer pressure and dishonesty are problems that I have encountered many times and have unfortunately become very familiar with dealing with. Although it may be difficult to remain truthful and resist pressure from my peers, I try my best to stick to my morals. However, I can easily relate to the feeling of wanting to be accepted by all and blindly following the actions of others because I behaved similarly not to long ago in middle school. Back then if someone higher up on the social ladder had asked me to do something, I would not hesitate to fulfill their request, not worrying about the consequences that might come from my actions. Another central theme that I personally connected to is the characters devoutness to God. I have grown up in the church and having been raised in a very religious family, I have basically been a Christian my entire life. My experiences certainly made it easier for me to understand and relate to many of the characters in the play because following any religion causes people to have to make sacrifices and I understand how difficult it can be to follow religious guidelines. The main focus for the majority of the characters in the play is to try to maintain their reputation and in doing so, they lie and cheat and judge one another. Although this play was written many years ago, I believe many of the themes in “The Crucible” are still relevant today and affect many different parts of my life.

How and why have you responded to, “The Crucible” in a personal, creative, and critical way?

For my project, I decided to use an infographic to show how I related the theme of peer pressure in the novel, to it’s relevance today. I chose to do an infographic because it allowed me to create a visual project that I was able to design and layout in the way that I wanted it. Throughout the process of creating my project, I was able to reflect and find connections to some of the different lessons and themes in the play and I critically selected which theme I thought was most relevant in the book and today. I creatively came up with an interesting form of presentation and used images and text to creatively explain the theme that I chose. I was also able to use my critical and creative thinking while choosing the examples that I wanted to use from the play, as there were many options to choose from, I had to select the one that I thought best represented the theme of peer pressure.

Thermos Challenge

Physics 11, Uncategorized

Prototype Testing Procedures:

     

Prototype Organizer #1:

      

Prototype Organizer #2:

      

Prototype Organizer #3:

     

Temperature vs Time Prototypes Graph:

Final Product:

Materials:

  • 1 glass jar (0.8W/m.k)
  • 1 plastic lid (0.03W/m.k)
  • 39.86 sq in of foam insulation (0.03W/m.k)
  • 1/6 sheet of paper (0.05W/m.k)
  • 4 dimes of glue (0.14W/m.k)
  • 2 googly eyes (0.03W/m.k)

Results:

Total cost = $3.00

Starting Temperature = 86.1°C

Final Temperature = 62.0°C

Change in Temperature = -24.1°C

Explanation and Justification:

The materials and ideas used to create this thermos were thoughtfully chosen. First off, we had to take into consideration thermal energy, this being the idea of a total amount of molecules in a specific amount of material and how these molecules interact. The faster the mocleules either vibrate, rotate, or translate the more friction there will be which results in more thermal enegery allowing there to be a higher temperature because of the average movement of kinetic energy of molecules. Therefore, with this idea in mind we worked together to find materials with a low thermal conductivity to be able to maintain this kinetic energy in the thermos. We decided to use foam insulation as our primary defense against heat loss as it has a low thermal conductivity of 0.03W/m.k – the lower the thermal conductivity the better it is as an insulator. As a result the foam was able to insulate the glass jar which also had a relatively small thermal conductivity of 0.8W/m.k. With both products and the plastic lid (0.03W/m.k- thermal conductivity) we were able to insulate the water and keep it’s heat. After learning from our first prototype we knew we needed to cover the top and bottom of the thermos due to conduction, convection, and radiation. As we do not want to lose heat, choosing to add insulation to the bottom of the glass jar elimated direct contact to a possibly colder surface which helped minimize heat loss. In addition, cold air/water is more dense meaning it would be at the bottom of the jar which is why we insultated the bottom even more to keep this needed heat inside. Also, by adding foam insulation to the top, we were eliminating further heat loss of the water’s heat through convection, since hot air/water is less dense allwoing it to rise. On the other hand, we weren’t able to minimize additionnal heat loss due to radiation because our budget would not allow it; however, if it had been possible, we would have added a refelctive layer on the inside so the heat wouldn’t have been able to radiate out as easily. While conducting our final experiment with the thermos we also took into account the law of conservation of energy. With this in mind we decided to warm up our thermos ahead of time to ensure we minimized as much heat loss as possible, as heat travels from hot to cold showing that the boiling water’s heat could travel to the cold jar’s “heat”. Furthermore, before measuring the temperature final temperature of our thermos, we quickly warmed up the thermometer so that the thermometer wouldn’t cause us to lose a lot of heat as the water’s heat would travel to the thermometer. Overall, we worked to create a “vaccum” to seal in heat by using various products and techniques that would minimize heat loss while also creating an appealing, adorable appearance of a bear. In the end, our thermos accomplshed it’s goal, and was a success because multiple aspects were considered throughout the design process and execution.

The Wreck of the Edmund Fitzgerald – Ballad

English 11

The ballad, The Wreck of Edmund Fitzgerald, written by Gordon Lightfoot, explores the central themes of both loss and environment. This poem tells the story of the sailors that died in the tragic wreck, during an unexpected storm, on Lake Superior. Unfortunetly, 29 men lost their lives in the wreck, leaving their families behind. The author demonstrates the theme of loss through the misfortune of the sailors and the impact it had on their families. After the wreck, all that was left was their leagacy, “And all that remains is the faces and the names/ Of the wives and the sons and the daughters” (Lightfoot 39-40). Their faces and names will forever be remembered as the brave men who barred the great waves that caused the unexpected shipwreck. The sailors were not prepared for the weather that they were going to have to endure, and once they had realized the severity of the storm, it was to late: “The wind in the wires made a tattle-tale sound/And a wave broke over the railing/And every man knew, as the captain did too,/T’was the witch of November come stealin'” (Lightfoot 17-20). The storm that the sailors faced, is comparable to one of a hurricane. The ballad is warning us to prepared for any situation, as the unexpected is not as unlikely as we may believe. We have to remember that weather and the environement that we are in can be unpredictable and is constantly changing. We must learn from the mistakes of others, even when it may seem that all hope is lost. Their sacrifice will inspire others to be prepared for anything and to continue fighting until the end.