14 January 2018
Why Nuclear Energy Is Great
When you hear the words “nuclear energy”, you don’t usually think of clean, efficient energy, but rather dangerous and hazardous to the environment. Nuclear energy is very misunderstood by the general public or people who have not done some research on it themselves. Nuclear energy is actually one of the most environmentally friendly sources of energy, it isn’t as clean as wind or solar energy though, but it is significantly more efficient. The production of nuclear energy doesn’t emit any greenhouse gasses, which is the main culprit for global warming. Greenhouse gasses absorb certain frequencies of infrared eradication and scatter them back to the surface of the earth, heating it. Greenhouse gasses prevent heat from escaping the earth, keeping it warm, which can lead to the melting of the ice caps, which will lead to dangerously high sea levels. A nuclear power plant actually emits fewer radioactive materials into the environment that a traditional coal burning facility. It is estimated that nuclear energy has saved 1.84 million lives by not releasing countless pollutants. Nuclear power is more efficient than other sources of power. It is estimated that nuclear energy has a 91% efficiency rate. Actually building a nuclear power plant will cost a lot more than a power station that generates the other types of energy, but nuclear energy itself is cheap. In 2007 the cost of nuclear generated electricity was 1.7 cents per kilowatt hour, the cost for coal for 2.4 cents, 6.7 cents for natural gas, and 10.2 cents for oil. Nuclear energy has an enormous capacity. One kg of 4% enriched fuel grade uranium released the same energy as almost 100 tons of coal or 60 tons of oil. Each year the US saves $12 billion dollars on energy costs because of nuclear power. Nuclear power plants save a lot of money that could be used on great things such as hospitals, education, and making sure people are fed. One in five households and businesses receive power from nuclear power plants in the US. 13% of the worlds energy comes from nuclear power plants, even though there are only 449 of them in 30 countries, as of April 2017 there are 60 new nuclear power plants under construction in 15 countries. Nuclear power is extremely powerful so there must be some serious downsides when handled incorrectly. What about the safety of nuclear energy? Nuclear energy is used in massive bombs used to blow up entire cities so it must be super dangerous right? Accidents in nuclear power plants are far more harmful than accidents in other power stations but the risk of an accident is low and declining. A repetition of the famous 1986 Chernobyl disaster, which displaced over 300,000 people, is virtually impossible. Hopefully after taking in all this information you are now informed on why nuclear power is not the terrible thing you may or may not have thought it was. I believe that nuclear power will be the main energy source in the future because of how great it is.
I am Biff, I am a fantastic football player. I have yet to graduate high school because my math teacher flunked me. My father is Willy Loman, a mediocre salesman, and possibly a suicidal maniac. I am most definitely a ladies man. Keeping jobs has been a trouble for me, I haven’t kept one job for as long as I would like and I am just jumping around from job to job. I really don’t think my father, Willy likes me for this specific reason. I am trying to get a loan of 15 thousand dollars so I can have my own ranch but I am asking for the loan from somebody I have stolen from in the past.
18 December 2017
“I Know Why the Caged Bird Sings”, Poem Analysis
The poem “I Know Why the Caged Bird Sings”, by Maya Angelou, is denotatively about a bird that is in cage, restricted, watching other birds outside fly around with no restriction. Connotatively this poem is about how black people are oppressed and have restrictions that white people do not. black Poole in this poem are represented by the caged bird, and white people are represented by the free bird. The theme of this poem is oppression and restrictions, and how oppressed people had nothing but their voice to protest. To put this into a thematic statement we could say: your voice is your most powerful weapon. Violent protests from black people in America never worked, but when revolutionaries like Martin Luther King fame along, they got social reform by using their voice instead of violence. Three poetic devices in this poem are: Allusion, personification, and rhyme. The birds in this poem allude to the different races, the free bird referring to whites and the Caged Bird referring to black people. When it is said that the birds sing it is personification because the birds are given a human trait. There is also rhyme in this poem. Ex.
The caged bird sings with fearful trill of the things unknown but longed for still and his tune is heard on the distant hill for the caged bird sings of freedom
The rhyme scheme in this stanza is ABABBABA. This poem is significant because it represents to much move than just birds flying around. It has a very deep connotative meaning.
The video below looks just like magic, how can something just change by itself right in front of our eyes? Well, with some understanding of waves we can explain this phenomenon. The big idea, or sole reason to this so called magic is refraction. When you look at the glass the light rays bend around the center of the glass, causing the light rays to intercept each other between the glass and the arrow, or piece of paper, creating a focal point, the light that was on the right side is now on the left and vice versa, this causes the arrow to appear to be inverted, which makes it appear to be backwards. Anytime light light goes through one medium into another, it refracts. In conclusion this is in fact not magic, but can be straight forwardly explained using wave physics.
This clip is demonstrating destructive interference, one person flung the slinky down and the other flung the slinky upward, when the waves meet in the middle they cancel eachother out making the slinky take the form of a flat line once again.
This clip demonstrated constructive interference. Both group members flung the slinky in the same direction (up or down) at the same time so that the waves would collide, when the waves collides they constructed a bigger wave, like they combine forces.
In our third trial we rapidly slinged the slinky back and forth, our goal was to find how many node points we would make with our slinky, a node point is basically one wave, if it takes 3 waves to reach the other end the slinky has 3 node points. It is a lot easier to see if the slinky is going at super rapid speeds but we counted 3 node points on our slinky.
For the “Archimedes Challenge” we had to build an ancient machine, the machine me and my group constructed over a course of 4 days is called a trebuchet. The trebuchet was invented in China in 300 BC. It is unknown who exactly invented the trebuchet but the machine was used by the Mohists as early as the 4th century BC, Mohism was an influential philosophical, social, and religious movement in ancient China. The trebuchet was invented for the purpose of war but more specifically sieging. Sieging is when military forces surround a town or city with the purpose of cutting off supplies, forcing a surrender. The trebuchet was not invented simultaneously in different places but eventually made its way to the west due to the Avars. The Pannonian Avars were a group of Eurasian nomads of unknown origin during the early Middle Ages. The short term effect was that whoever had access to the trebuchet had a great advantage when sieging because nobody would have prepared for such a weapon yet. Long term effect is that cities were forced strategized against the trebuchet like maybe building walls differently which could lead to some new discoveries in engineering.
The trebuchet we made in class is a little different than a traditional ancient trebuchet. Instead of a rotating axis for the throwing are to slide on, we used a hinge instead to attach the arm to the beam and still give it a very large throwing radius. We have elastic bands attached to one side of the throwing arm, on the opposite side of the payload basket. When the side of the payload basket is pulled down, more and more potential energy builds up the farther you pull it down. When you let go, all that potential energy turns into kinetic energy and the throwing arm throws whatever object with great force.
We spend the class discussing as a group what we would like to build, we settle on a catapult and plan to fully design our catapult the next day.
We have a bit of a debate wether or not we should make a catapult because we notice a lot of other groups have the same idea as us. We make our idea more unique by making a trebuchet, which is sort of a catapult but really isn’t and our idea will be totally original. We make a very rough sketch of what our trebuchet will look like.
We secure 4 pieces of wood into a frame very strongly together using a hot glue gun, it is crucial we get this part perfectly or our trebuchet will not be strong enough to handle the recoil of the force it is putting out.
We use nails to make the rest of the body, we then attach the beam using a hot glue gun, we attach the throwing arm to the beam using a hinge and nails. we test the trebuchet out and the beam fails or straight up flies off so we decide to use nails to secure the beam instead, we test out the trebuchet several times and it is fully functional. The building process is now complete.