What is a yo-yo? A toy consisting of a spool attached to a string. Hmm. Try this, a toy consisting of a long string attached to a spool that is dropped and raised repeatedly using the force of friction, gravity and momentum to unwind and rewind the string. Although it is just a spool and a string it can do amazing things in the right hands. Some people learn how to work a yo-yo the first time they try while others have a hard time trying to get the spool back into their hands. Soon you will find out all there is to know before playing with these devices. There is a scientific background in yo-yo’s, something extraordinary that brings yo-yo’s to life. These simple toys are remarkable demonstrations of fundamental scientific principles. Let’s bring physics into the world of yo-yo’s.
There are many scientific terms that describe yo-yo’s function. Although a yo-yo is a simple device, there is so much behind the scene of it. You will learn that there are various types of yo-yo’s: original, modern, fishing yo-yo’s, and yo-yo’s that are present today (with more advances). Traditional and modern Yo-yo’s are more complicated to play with because there is only the string attached to the axle which makes it harder to do tricks (no support). Newer yo-yo’s have support as they are built with a ball bearing system. Later you will find out what that is. There is also various body material of yo-yo’s: (wood, plastic, metal), weight, axle design, shape, and size which all play a huge role in yo-yo’s performance. First, we’ll look at the differences in traditional and modern yo-yo‘s. (In the picture to the left), the traditional yo-yo design has a single-tied string securely tied around the axle where in the modern design; the string is double-lo...
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...o rewind completely, the person must give a slight tug on the yo-yo to counterbalance the energy lost to friction. Friction is caused by the axle rubbing against the string as it winds up; however, in the modern design, there is less friction between the string and the axle because the string is only looped around the axle; therefore, more friction is needed in tugging the yo-yo back into the palm of your hand. Coming back to “sleep”, it is relatively difficult to wake a yo-yo up. Manufacturers have tried to make waking up a yo-yo easier so they found an improvement in doing so. One of the improvements was shifting the weight of the yo-yo to alter is moment of inertia.
http://www.howstuffworks.com/yo-yo.htm http://www.youtube.com/watch?v=smT3teaCQ9s http://www.youtube.com/watch?v=igOjrQCJuPM
http://science.howstuffworks.com/transport/engines-equipment/bearing1.htm
In Hands-on Squishy Circuits, AnnMarie Thomas showed us how she took a home-made PLAY-DOH recipe and turned it into a science experiment. It’s amazing that three and four year old children play with something so revolutionary. We may not realize this now, but if we start introducing this stuff to these children, they’re going to become such intelligent adults. I ask myself this question everyday,”Do I want my child to be successful in life, or let them flip burgers at McDonalds?”. I want my child to be able to learn and succeed as they progress in life. This is extremely important for children these
Ever wondered how roller coasters work? It’s not with an engine! Roller coasters rely on a motorized chain and a series of phenomena to keep them going. Phenomena are situations or facts that have been observed and proven to exist. A few types of phenomena that help rollercoasters are gravity, kinetic and potential energy, and inertia. Gravity pulls roller coasters along the track as they’re going downhill. Potential and kinetic energy help rollercoasters to ascend hills and gain enough momentum to descend them and finish the track. Inertia keeps passengers pressed towards the outside of a loop-the-loop and in their seat. Gravity, potential and kinetic energy, and inertia are three types of phenomena that can be observed by watching roller
Ankle sprains are one of the most common musculoskeletal injuries and are especially relevant at all level of sport.1 Of all sports, the incidence of ankle sprain is higher in volleyball considering its non-contact nature.2 The most common ankle sprain occurs on the lateral or outside part of the ankle.3 Reports estimate that ankle sprains account for approximately 24% to 54% of all sport-related injuries and 23,000 persons get them per day in the United States.4
An author’s way of writing and portraying a character are one of the important things to note when reading a novel. Whether they use third or first person as their view point, have their main character have an underlying dark secret that is not revealed until the end of the novel. However an author wishes to write their novel, there is always a drawback to it. Kazuo Ishiguro’s way of writing his novel Never Let Me Go is in a first person perspective where the narrator, Kathy H., reassess her life of being a clone but the way Kathy remembers and discusses her memories of living in Hailsham is hindered by the fact she inputs her own feelings and thoughts into what happened in the past.
On July 2, 1962, the first Wal-Mart store opened in Arkansas, and over the next 50 years, Wal-Mart became a retail giant. Holding the title of the world’s largest employer, only comparable to the United States Department of Defense and Chinas Army, Wal-Mart employs over 2.1 million people. Sam Walton’s philosophy was low prices. Instead of offering good sales every once in a while, Walton offered an “always lower price” than competitors on things that ordinary people use every day. This philosophy continues to attract more than 140 million shoppers per week. This staggering amount of shoppers helped produce a revenue of $443billion for fiscal year 2012 alone (Matthews, 2012). With more than 6,000 stores in 14 countries, Wal-Mart produces remarkable revenue each year (Hesterly, 2010). With literally billions pouring into the company, one must assess how the money is controlled and if its accounted for by the best contemporary management techniques on the market. While Wal-Mart thrives on the use of benchmarketing and lean accounting, the Theory of Constraints paired with lean accounting could produce staggering results for Wal-Mart in terms of financial management.
Gymnasts use physics everyday. As a gymnast I never realized how much physics went into every motion, every back handspring, every mistake on the bars. If gymnasts were physicists (or at least knew more about physics) they would be better equipped to handle the difficult aspects of gymnastics. As a gymnast I learned the motions that were necessary to complete the tricks that I was working on, and as a coach I taught others the same. I never truly understood why a particular angle gave me a better back handspring or why the angle that I hit a springboard at really mattered when completing a vault. We are going to explore some of the different apparatuses in gymnastics and a few of the physics laws that are involved in them. We will not even barely scratch the surface of the different ways that physics can explain gymnastics.
William Golding was born on September 19,1911 in St Columb Minor, England. His mom fought for equal rights for women and his dad was a school master. William Golding tried to write his first book when he was just twelve years old, but he failed. That did not stop him and went on to attend Oxford University and studied English literature. William Golding even published a book a year before he was to graduate, but of course was looked over by many critics. He became a teacher like his father, but then decided to join the Royal Navy and spent six years fighting in World War II. He went back to writing and teaching after World War II ended and nine years later he published his most famous piece of work, Lord of the Flies.
“As a child, I loved athletics and physical activities. I was talented, but my talent was not appreciated or approved of by most. I watched my brothers compete on school teams. It didn't matter that in the neighborhood pick-up games, I was selected before my brothers. Society dictated that I should watch, and that they should compete. So at home in the backyard, I would catch as my brother worked on his curve ball, I would shag flies as he developed his batting prowess and, as I recall, I frequently served as his tackling dummy. The brother I caught and shagged for, and for whom I served as a tackling dummy, went on to Georgetown University on a full athletic grant. He later became vice president of a large banking firm. So, while I rode in the back seat on the bus of opportunity during my lifetime, I want my daughter's daughter and her peers to be able to select a seat based on their abilities and their willingness to work. Don't deny them the things that I dreamed of."-- Excerpts of a letter sent to OCR in spring 1995 by Joan Martin, Senior Associate Director of Athletics, Monmouth University, New Jersey
The common statement “Beauty is pain” is something a girl would completely understand. We understand it and accept it because we know the final product of our hair, face or body will be worth whatever pain we put it through. Maybe there is truth to this statement because everyone has tried some kind of diet where we select the salad instead of that amazing cheeseburger. These sacrifices can be pretty painful, but we continue to give in knowing we will improve our overall health. Exercising, which is another sacrifice made to better our health, can also be extremely painful and any person that has ever gone on a hard run knows exactly what that pain is. But, in addition to getting your body in shape, running goes beyond toning and strengthening muscles or loosing a few pounds. Running has so many benefits that many people don’t even know about. As little as thirty minuets of running during the week can do wonders for a persons health. (Allen, 2014) That doesn’t sound too painful now, does it? In fact, running benefits a person’s mind, body, and age.
Can taking exams cause much stress on students? There is such thing as exam stress. The stress includes disturbed sleep patterns, tiredness, worrying, irregular eating habits, increased infections, and inability to concentrate (Dunford, 2014). Would our society be better off without final exams? A final exam is an examination administered at the end of an academic term. Neil DeGrasse Tyson once said, “The only way you can invent tomorrow is if you break out of the enclosure that the school system has provided for by the exams written by people who are trained in another generation (year).” What he is trying to say is that we need innovation within our school systems. We cannot base our tests and exams off the same exact thing every single year. Our students are being taught the test and not the actual subject. The tests are normally from a long time ago and they are just re-used and something needs to be changed about that. Our school systems need to start using alternatives to the final exam. There are alternatives to the typical academic testing out there and school systems need to start using other methods to measure the retention and performance of their students.
“Even though roller coasters propel you through the air, shoot you through tunnels, and zip you down and around many hills and loops, they are quite safe and can prove to be a great way to get scared, feel that sinking feeling in your stomach, and still come out of it wanting to do it all over again (1).” Thanks to the manipulation of gravitational and centripetal forces humans have created one of the most exhilarating attractions. Even though new roller coasters are created continuously in the hope to create breathtaking and terrifying thrills, the fundamental principles of physics remain the same. A roller coaster consists of connected cars that move on tracks due to gravity and momentum. Believe it or not, an engine is not required for most of the ride. The only power source needed is used to get to the top first hill in order to obtain a powerful launch. Physics plays a huge part in the function of roller coasters. Gravity, potential and kinetic energy, centripetal forces, conservation of energy, friction, and acceleration are some of the concepts included.
How would today’s world be if the technology that is known and loved by millions suddenly vanished? Could the world re-adapt to the lack of technology, or would it plummet into Darkness and Despair? In actuality, if someone can develop artificial intelligences to a certain limit he or she can prevent many of the world’s future problems. In a sense, Mankind can benefit greatly from the further use and development of Artificial Intelligence although some people would have one believe that the further development of Artificial Intelligence (AI) can endanger large areas around the world.
“For most of my life, I went to unisex salons that reeked of perm chemicals and mousse. Every time I’d go, I’d walk away with a bad haircut. On top of that, I always felt out of place”(Lemon Sunrise). This demonstrates that going to a unisex salon is never going be the same thing as a barbershop because no matter what most of the times the haircut is never going be as good as it should be. Another thing that is always going be bad about that too is that as a male client you're always going feel out of place because the other clients that go there are females not males clients. Barbering is the best way to service clients when it comes to hair.
Recent studies on parental involvement in education have found that there are many benefits for both the student and the adult when parents become involved in their children’s education. Without parent support, it is very difficult for a child to be motivated. From what I have seen growing up, only a small percentage of students are self-motivated, so it is absolutely vital that parents assist in the motivation process. I found this table to be particularly interesting and important.
The term management accounting refers to producing information to internal sources. These internal sources can be top-level managers or floor supervisors. The information that is produced is used for planning and controlling the company’s actions while also producing information that aids in the decision making process. A management accounting systems is used as an aide in this process. Management accounting systems can produce information for the costs of goods, products and services, and other departments in the company. A management cost accounting system produces information regularly for budgeting, performance, and the production of cost reports (Talha, Raja, Seetharaman, 2010, P. 83).