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etracey99 last won the day on January 29

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About etracey99

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  1. As many of you know, the banana is my favorite fruit. An apple banana* a day keeps the doctor away! Bananas start off by being very short and straight: As time goes on, however, they begin to curve upwards... Due to a process known as negative geotropism, which means that the bananas grow away from the force of gravity! They do this because in the forests, if they started to grow sideways towards the light that penetrates through the trees and plants above them, they would topple over. So bananas figured out that if they grew up towards the light instead of sideways, their plant would not topple over, and they would all be safe. Thank you for existing, bananas.
  2. The Physics of Caster Boards

    They are so hard to ride, but it looks so cool when you get it right!
  3. What I thought was going to be the hardest midterm I had this year, actually turned out to be not too bad! For the entire first half of the year, I have now found that practicing physics at the level we have been working on has prepared us very well for the midterm and the AP. As a person who struggled through a lot of the review packet and put in a lot of studying for the weeks leading up to the test, I think it is safe to say that practicing physics and learning it so far this year has been difficult, but rewarding. For the rest of the year, I think that my studies can get even better and efficient, and reviewing the mechanics part of the class will progressively get better and better. For the E&M section, I am going to have to continue pushing through the difficult learning curve and remain confident in myself so when the AP's come around, I am ready to conquer them. Stay confident and be proud!
  4. What's at the End of a Rainbow?

    Aww man, no gold at the end?
  5. To many, planes fly because they go fast and they have wings. When I was younger, that is how simple I thought it was. Well, there is a little more to it than that. There are four forces of flight: lift, drag, weight, and thrust, which correspond to upward, backward, downward, and forward forces, respectively. Thrust is what moves the aircraft forward through the air, it overcomes the drag and the weight of the plane. The thrust for a normal plane comes from an engine/propulsion systems such as a propellor, turbine or a rocket. Weight is simply the force on the airplane caused by gravity. Drag is the force that opposes the plane's motion through the air and is generated on every part of the airplane. There is even drag that is caused by the generation of lift called induced drag. Lift is a very complicated force. It is the force that is the opposite of the plane's weight and it holds the plane in the air. Some lift is generated all over the entire plane, but a majority of it is generated on the airplane's wings. This is what we will discuss a little further, because lift is extremely interesting: How is lift generated? Lift occurs when there is a flow of a fluid turned by a solid. A fluid can actually be catorgorized as either a liquid or gas, so when lift occurs, the plane and its wings turn the air. The wings are designed so that a low pressure area is developed with air that moves very quickly along the top of the solid, and a high pressure area is developed with air that moves more slowly along the bottom of the solid. The result is an upward movement as the high pressure pushes the plane into low pressure with an equal, opposite force. Needless to say, planes have incredibly well designed wings that create lift, which is the vital part to why planes fly, and is very awesome to see the physics behind!
  6. Importance of Weight Distribution

    For my Eagle Scout project, my dad and I had to take 10,000 pounds of cinder blocks on his trailer from the city to Irondequoit. We tried to be extra careful to distribute all of the weight so we were extra safe!
  7. Last night while I was watching the news, one of the featured stories was about a heated runway at Des Moines International Airport in Iowa. The runway was being kept at 62 degrees Fahrenheit so any snow that landed on the strip of the heated runway would melt very quickly. To do this, researchers at Iowa State University embedded electrodes into the concrete and powered the electrodes. When they turned on the electricity the electrodes began to heat up the concrete around them, which would make the snow on top melt. The even cooler part is that although an entire runway costs about 200 million dollars to heat, it is projected to save passengers, airlines, and airports 273 million per heated runway. Useful and money well spent! https://www.today.com/money/could-heated-runways-melt-away-your-winter-travel-headaches-t121729
  8. Eardrum vs Sound

    @BrandyBoy72 I do not believe so, I think the intensity of sound depends on how much energy the waves carry... https://www.physics.rutgers.edu/ugrad/301/PS08_Intensity_New.pdf
  9. Believe it or not, sounds are one of the most common and dangerous hazards a person may face on any given day. Generally, we measure how "loud" a sound can be in decibels (dB). By definition, a decibel is " a unit used to measure the intensity of a sound or the power level of an electrical signal..." (Google Search). We will be discussing decibels in regard to "intensity of a sound." If you enjoy listening to music loudly, I am sure that somebody at some point has said that your music is too loud, and it could damage your ears. Well, they are not wrong; according to http://dangerousdecibels.org/education/information-center/noise-induced-hearing-loss/, it is possible to experience damage to your ears while listening to your music through earphones for only fifteen minutes a day. This damage is caused by music at about 100 dB. Furthermore, sitting front row at a concert of your favorite band will likely produce a sound intensity of around 110 dB. At this intensity, damage to your ears will be caused a lot more quickly but, you will not feel the damage or pain while it is happening. The intensity of which you would be experiencing pain in your ears is at 130 dB, which is close to what a concert sounds like. And lastly, the intensity of which that will rupture your eardrums is at 160 dB. Bursting eardrums... I don't like the sound of that (pun). If you would like to look at some more physics on this topic, look at: https://metinmediamath.wordpress.com/2013/11/13/intensity-or-how-much-power-will-burst-your-eardrums/
  10. How Different Pitches "Break"’

    When I was little, I used to yell at a mason jar... Physics said "Nay!"
  11. Gauss Rifle/Coilgun

    What. That is awesome!
  12. The Many World Theory

    This kind of thinking hurts my brain.
  13. The answer is most likely neither, but... physics! So, a Hummer (H1) weighs around 8113 pounds, or 3680 kg, and can travel at a top speed of 55 m/s. This results in a Hummer having a max momentum of 202,400 kg*m/s. A Lamborghini Aventador, on the other hand, weighs around 4085 pounds, or 1852 kg, and has a top speed of 97.22 m/s. The Lamborghini's max momentum is 180,051.44 kg*m/s. So although the Lamborghini can travel at a much higher speed than the Hummer can, the Hummer's weight overpowers the difference in speed. Therefore, if you have a choice for some odd reason, to choose what car to get hit by, go for the Lamborghini. Either way, ouch!
  14. A Couch... And My Hair

    In the winter my bedroom gets really dry, so when my PJ's rub against my sheets, you can see small sparks all over my bed when the room is dark!
  15. One of the world's favorite characters is Sonic the Hedgehog, a blue hedgehog who runs incredibly fast. Sonic can run at around Mach 15, which is 5,104.4 m/s (11,509 MPH). That is incredibly fast! He also weighs about 34.93 kg, which means that at full speed, his kinetic energy is about 455,048,817.3 J. If a normal hedgehog which weighs about 0.91 kg, were to run at its top speed of 5.3 m/s, its kinetic energy would be around 12.8 J. This is about 0.000003% of the energy that Sonic generates.

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