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About BrandyBoy72

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  1. "Semester Review"

    My Semester Review Pledge to physics: I really think math is fun, it's like a puzzle, seriously no sarcasm here, I really enjoy taking math tests. They are surreal in a way, and I don't even know what surreal means, they just are and that sounds cool. But time goes by so fast and I just feel like super cool when I know what's going on, like we're speaking some secret code or something that only our class knows how to speak. Now, I need to take that same fascination and put it into the physics setting. Something about physics is different than math, perhaps it's that it's not the same kind of problems, physics problems often take quite a bit of thinking (no offense to BC calc) but, physics is much harder IMO and I think many of you can agree with me. So I (and maybe there's more of yo out there too) need to try harder in physics. period. end of story. Nope wrong JK got you good. I need to take that same feeling I get with math and have fun with physics, put some more time into the understanding part so that the problem solving part comes more naturally and is in turn more fun.
  2. Wisdom Teeth

    I recently had my wisdom teeth removed, and it wasn't even the worst experience of my life, all thanks to the Novocain. My face was completely numb, couldn't feel a thing. It's not like I couldn't feel any forces though: I could tell that my cheek was being pulled to one side because my hole head felt the force of the pull, but I could not feel anything touching my cheek, an odd experience. And after the surgery I was touching my face a lot because touching your own face when it is numb is a very weird sensation, hard to describe. And this got me to realize that when something touches you, sometimes it is only sensory, without any feeling you wouldn't even feel the force. So I then thought: if you had no feeling in you at all, would you not know if you were being pushed? What let's you know that you are falling, I think there's something to do with your inner ear or something, but otherwise what? your sight of course. This is an interesting direction to take this in... So if you ever wondered what those blocks in physics problems feel on the daily, just imagine that you have no feeling anywhere in your body, no sight, no sense of anything and you're being pulled by some weird floating rope or sliding down a frictionless incline, how does that even happen anyways?
  3. Green

    Green is my favorite color, here's why: the frequency of green light is 526-606 THz(Terahertz) and it's wavelength is 495-570 nm In my opinion, green should replace yellow as a primary color, it is just so much better The colors displayed by your computer screen or TV are made of super tiny pixels made of 3 different colors, red GREEN and blue, hence RGB VS Seeing these colors very zoomed out(as your eye does) can make them seem like any other color on the spectrum from black to white But why green and not yellow, it would make sense for it to be yellow because it is one of the primary colors like red and blue? This is because red green and blue are additive colors, meaning that as you add more of the color, it gets brighter, and this makes sense to use for computers because they emit light. The reason that anything is any color, is because of how light is absorbed, if (almost) all light is absorbed by surface, it will appear black. This is why black surfaces get so hot in the summer, because they are absorbing more light energy. If a surface absorbs (almost) no light, then it will look white. So any light that is seen by your eye is reflected light off of a surface, otherwise that light will be absorbed by the surface and turned into heat. The differences in the wavelengths of the colors in light are what cause them to be absorbed by a surface or not. This has been a rudimentary explanation of light, there are of course many more things that could be discussed, perhaps that can be in a future post.
  4. Wendy's

    I was at Wendy's today, getting a drink, from one of those fancy drink dispensers. It is amazing how there are so many flavors and types of drinks to choose from, a massive increase in choice from those old ones where you could choose from a variety of like ten drinks, now it's more like 100. The machines are very compact too, all the drinks are dispensed from the same exact place on the machine. The machine is coded itself to of course give you the drink of your desire, go on the menu and select your type of drink and flavor until you've gotten to a specific drink of your liking, then hit the button. Cherry Coke, Minute Made lemonaid, or all the Poweraid flavors mixed together into your own concoction of "rainbow Poweraid" - it's all that easy, but how the drink gets into your cup is also a bit like coding, you pressing certain inputs will get different outputs, this is similar to doing a lab. To inspect different things in physics we will do certain inputs - perhaps dropping a weight, or oscillating a spring - and different outputs occur which need to be analyzed, like drinking your rainbow Poweraid, thinking it was not worth making that old guy behind you mad at how long you were taking, and it doesn't even taste that good, you probably should've just gone with one flavor, two at most. But that's how experiments go.
  5. Hacky Sack

    The game of Hacky Sack is a good one. Full of skill and such. The "footbag" itself goes through a lot of getting smacked around, flying through the air in parabolic arcs like any other projectile. The players in the game have to pretty much predict where the hacky sack is going to be when they hit it. Of course no one is going to set up an equation to see where the sack is and where it is going to be, that is absurd. Rather in this fast paced game players get used to the force they hit the sack with and then from there are able to use their sense of sight to see where the ball is going. This is possible because of the predictive natures of parabolic arcs, the hacky sack is going to come down with the same velocity it was kicked up with (give or take a little given air resistance). And because humans are very good at learning patterns, it is not too hard to get good at playing hacky sack. Knowing how hitting the sack differently will effect it's flight through the air is a part of learning the game, and a little part of learning physics.
  6. Eardrum vs Sound

    So decibels are the measure of the intensity of sound, does that relate to the amplitude of the sound waves, or maybe the frequency?
  7. Breaking the Ice

    I was going for a nice walk today, it was a bit cold, but it didn't bother me too much. And I didn't too much mind the somewhat cloudy sky, the sprinkled snow on the ground was a nice touch as well. At one point I came to a spot on the sidewalk where the ground beneath my feet was no longer cement, it was ice. BUT THIS, this was no fine smooth sheet of ice, this was a cracked earth beneath my feet. The first crackle that reached me made me believe that I had just found my way onto some broken glass bottle, but a quick somewhat concerned glance below proved the sound to be otherwise. The ice, cracked from both myself and no doubt a handful of other average Joes who also daringly walk the streets of Rochester on such a day, got me to think. After my midday midwinter escapade, and after a few minutes of warming up, I warmed up to the subject of Thermal Shock (this is where the somewhat sciency stuff begins). This has to do with the cracking of ice, whether from heat or from some guy walking on it. So, ice breaks, but so does other stuff, ice just might do it a bit more extravagantly, kinda like glass would, because sub atomically it has a crystalline structure to it. I'd go more into that, but that's more chemistry. In physics we like stress (preferably on objects we are testing). So, the ice is under stress, like when I walked on it, so it cracked; this happened a lot of times and very quickly. Of course, stress eventually causes failure, but what about this "Thermal Shock" Well, your time is precious so I'll do my best to sum it up for you the best I can. "Thermal shock occurs when a thermal gradient causes different parts of an object to expand by different amounts. This differential expansion can be understood in terms of stress or of strain, equivalently. At some point, this stress can exceed the strength of the material, causing a crack to form. If nothing stops this crack from propagating through the material, it will cause the object's structure to fail."
  8. Guitar Strings

    My good ol' guitar has been getting out of tune recently, I think it's time for a restring. The strings were not strung in the best possible way to begin with so they have slowly over time been slipping out of the tuners. Even if the guitar is re-tuned, the strings will continue to slip more and more, so they need to be taken off and replaced. I have however been putting this off for a while, while the guitar is still playable it sounds not the best. The first time I restrung my guitar, I was tuning it and a string broke, luckily it didn't hit me while flying off, because those things hurt. There's a lot of tension in those strings, they have to have lots of tensile strength to not break under the force that they are being stretched out with. Between the broken guitar and my exuberance with the skill, things have been slow going recently...
  9. Damage

    You may have heard before that potential energy can be described as the amount of damage something can do. Mr. Powlin gave us the example last year of something with a greater mass or speed will do more 'damage'. It should be also noted that the area which is affected by the force will determine the 'damage' and the duration of the impact. Also how the force is distributed into the object receiving the force. For example, a skier who weighs 150 lbs going 20 mph can lessen the damage of a fall by landing over a large surface area by spreading out, landing on his side rather than on an outstretched arm. Injury (damage) can also be prevented by channeling the impact through a medium which will disperse the force (a helmet). By going to the top of that hill you are increasing your potential energy, aka, increasing your potential for damage/injury, but that can be watered down by reducing speed, wearing a helmet, and of course: falling correctly.
  10. What makes an Element?

    Thank you for the in depth explanation on elements, this helped me to better understand the matter. I am glad that my inquiries were able to inspire you to create such content. P.S. My favorite kind of bond is a Hydrogen bond
  11. My bike and I

    I hope your bike serves you well for some time to come. also your tone in the beginning was a bit harsh, but I digress. Overall this blog was very nice, I think gear ratios are cool and they really are closely related to angular momentum> I remember learning about gear ratios in Principles of Engineering last year.
  12. Engineering Design Process

    The Engineering Design Process: The Engineering Design Process is designed itself to help outline how engineers (or anyone really) can solve a problem. We used this process when making the spinning tops in class, even if we did not know it at the time. Now let's go through it using the example of creating a spinning top, like we did in class. We Defined the Problem when we were given instructions: make a top. We had already done Background Research when we were working on understanding moments of inertia, it is determined by different equations for different objects, mostly relating to the radius of the object, or the length from where the object is revolving around. Our Specified Requirements were that it stood up long enough to be considered a top and that it was made only from the limited materials we were given. As a team, we Brainstormed and chose a solution that we put the pennies on the plate, and put the pencil in the middle, so that it would allow the pencil to stay upright. We then used that solution to develop a prototype, and we went through testing our solutions and based on our results, we made changes to our design. We found that moving the pennies closer to the base of the pencil allowed it to stay upright a lot longer. This process was repeated until we finally found a suitable final product, however, any design could always be better. The Engineering Design Process does not ensure a positive result every time, perhaps your results find that there is not a possible solution with the limited resources or knowledge that you have, in that case you would still communicate your results so others can see what you did and possibly come up with a better result. For example, we made a top that worked well, but another group found something that we didn't, if you cut the pencil down to make it shorter, it would stay up even longer, this is because the pencil tends to fall less when the radius is shorter (the pencil moved more about the top than the bottom, so making it shorter solved this problem).
  13. Quantum Leap

    your chemistry class sounds cool
  14. The Weight of Air (and birds)

    Commonly pondered question: How much does all the air on the Earth weigh? Make your predictions now: a) more than the Earth itself 0 kg, air weighs nothing, duh c) More than all the birds on Earth d) 7.89 kg One cubic meter (1000 liters) of air weighs 1.292 kg (so if you chose d you are probably already wrong) But that doesn't help us much, because as you go further up in the atmosphere, the density changes. The mass of the air is the same, but there is just less of it per cubic meter. Calculations: Another way to approach this problem: the air pressure at sea level is 14.7 psi, in other words, all the air in a 1in x 1in area all the way up to the top of the atmosphere would weigh 14.7 lbs ***we'll convert to more physics like units later*** Now we need to find out the surface area of the Earth: Earth's radius: 2.5E8 in (again we'll convert later) Surface area of a sphere: A = 4*pi*r2 = 7.854E17 in2 Now multiply: 7.854E17 in2 x 14.7 lbs/in2 = 1.155E19 lbs All the air in the Earth's atmosphere weighs approximately: 5.3E14 kg Compared to: All the birds on the Earth: net weight(very approximately) = 3.6E12 kg (if you chose c at the beginning, you win *suggest prizes in the comments*) The Empire State Building(approximately) = 3.3E8 kg 500 really big boulders(exactly) = 3.4E4 kg
  15. Units and Vector Directions

    In my previous post, I realize that I gave an incorrect answer to the solved problem. Not so much as incorrect, the number sure is right, but it is a vector (has magnitude and direction) and I treated it like a scalar (magnitude only), by leaving out direction. The answer should have been a=2.254 m/s2 downwards. Another thing I left out in the original answer was units, something that it is common for me to neglect or often mess up. Any time I am read a word problem for the first time I do what I was taught, take out only the useful information, ie. the numbers. And not uncommonly these numbers are connected to units, which I will inconveniently ignore. And by the time I get to the end of the problem, I will probably have an answer that is off by some power because I have not converted grams to kilograms or something like that. So remember: always use correct units and label directions on vectors!

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