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etracey99

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etracey99 last won the day on January 29 2018

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  1. Team Name: KT Explorations Inc. Available Funds: $100,000 Vehicle Name: The Speedy Boi Vehicle Parts List and Cost: 1. MK16 Parachute $422 2. MK1 Command Pod $600 3. FL_T100 Fuel Tank $150 4. LV909 Terrier LFE $390 5. TR18 Stack Decoupler x2 $800 6. FL_T400 Fuel Tanks x3 $1500 7. LV_T45 Swivel LFE $1200 8. 1.25 m Heat Shield $300 9. AVTR8 Winglets x2 $1000 10. RT_10 Hammer SLB x2 $800 11. Aerodynamic Nose Cones x2 $480 12. TT_38K Radial Decoupler x2 $1200 Total: $8842*(10% Foreign Enterprise Tax) = $9,726.2 Design Goals: Our vehicle is designed to launch off of P
  2. I don't know if I would go as far to say the greatest game of all time, but still pretty good! Nice to tie some physics into a classic series!
  3. Many of us know the Aurora Borealis as the 'Northern Lights'. This natural phenomenon is, of course, thanks to the physics of our Earth and its atmosphere! (Photo credit: NASA) The Aurora Borealis is an extremely beautiful event that occurs most often close to the magnetic poles of Earth. It occurs due to charged particles coming from the Sun of which collide with other molecules found in the Earth's atmosphere. Solar winds from the Sun carry these charged particles and when the wind passes by Earth, particles may be trapped in the atmosphere from the Earth's magnetic fields! The cha
  4. Have you ever seen a hot air balloon? Personally, I find them terrifying, but I always see a few every year while I'm enjoying time at my cottage on Keuka Lake. Well, it turns out that hot air balloons actually float through the air due to buoyancy, which we generally associate with water. This is based on Archimedes' principle, which says that an object of any shape that is suspended in a fluid is acted on by an opposite force equal to the weight of the fluid displaced by the said object. So a hot air balloon floats in the air using the same idea as an object that floats in water. I
  5. We live in a world where we are constantly trying to better our technology to be greater and more efficient. What if I told you that we achieved the most efficient mode of transportation of all time already? And what if I told you that this transportation was developed as far back as 1817? Behold! The bicycle. Since the first bicycle coming from Germany in 1817 (called the running machine), there have been great advancements in bicycles: Although this invention has been around for about 200 years, the bicycle proves to be one of the greatest and most efficient inventions in tran
  6. Today, the internal combustion engine is a very important part of the average person's life. We experience the wonder of this engine in most automobiles that use gasoline as a fuel. As one could guess, the Internal Combustion Engine is an engine in which combustion occurs internally... just kidding! (oversimplification at its finest). In all seriousness, let us discuss the four-stroke internal combustion engine since it is not too difficult to understand! It is called a four-stroke engine because there are four 'strokes' per combustion cycle (up, down, up, down). It goes like this: T
  7. Some common sense physics is that in most cases, things roll better than they slide. For example, roller blades work a lot better on asphalt than a pair of snow skis do. This is because there is a lot of friction created with sliding, but when something can roll over the ground, the friction is greatly reduced. A ball bearing is a device that 'bears' a load and rolls over smoothly. This is done by having round objects enclosed in a smooth inner and outer shell. There are several types of bearings in existence, but let us discuss ball bearings since they are the most common type of be
  8. This is a kangaroo: Kangaroos are large marsupials that have an iconic talent for jumping extremely far due to their well developed musculoskeletal system. How far can they jump? On a flat strip of land, a kangaroo can jump approx. 9 meters far and about 3 meters high. This is almost 30' long and 9'10" high! That is truly amazing! How do they do it? The musculoskeletal system of kangaroos are extremely efficient and is made for jumping far and quickly! The kangaroo is able to store potential energy in their legs every time they land, and this potential energy assists them in ju
  9. Have you ever waterskiied? If you have, I'm sure that you would agree that it is very fun and thrilling! I have been waterskiing for about 9 years, and I have always been fascinated by how it works. When I was taught to waterski when I was 9, my Dad and Grandpa told me that it was just like getting pulled up out of a chair and standing up. So untl I was older, that is all that it ever was to me. Well, it turns out that the physics behind waterskiing is actually very simple! But first, I will show you how waterskiing is done: (These are pictures of me from 2011) Fir
  10. I've been playing some Forza Horizon 3 on Xbox lately, and I have been having a lot of fun! I personally enjoy racing games a lot and I have been trying to get a little bit of playing in during this spring break. Something I have never done in another game, however, that I can do in Forza Horizon, is tune my cars. Just like musicians tune their instruments, many avid drivers often tune their cars to run exactly how they want them to. For example, you could tune your car's shift points so the car shifts into the next gear at different times, and you could tune the fuel-air mixture to create the
  11. 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 s
  12. They are so hard to ride, but it looks so cool when you get it right!
  13. 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 a
  14. 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 cau
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