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BrandyBoy72

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BrandyBoy72 last won the day on April 12

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About BrandyBoy72

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  1. Just a Little Hot Air

    I remember watching a Curious George episode as a kid that explained hot air balloons and it blew my mind
  2. Ferro Fluid

    This is an example of how magnets can be used for levitation, or hovering if you will. All this is, is simply the force of the magnet overcoming the force of gravity of the magnet and the liquid. In this way, a "hover board" would be nothing other than a force keeping something off the ground, which is just what a normal force is when you have an object sitting on the floor. However, using magnets for levitation is cool because you cannot see the force acting on the object, and the force can also be transferred through things, putting your hand between something being levitated by a magnet would not stop the magnetic repulsion, which is pretty cool to think about and even cooler to see.
  3. POLE VAULTING

    Pole vaulting is a very good example of the transfer of momentum. You are transferring energy from running down the runway into bend in the pole, and then that pole rotates after you jump, making the pole push you vertically. As a pole vaulter myself, I can say it is not all that complicated, it does not require you to be a physics student to get over the bar. However, it is super fun! It must be flying in the air and feeling the push of the pole behind you as you kick your legs up, hoping to get over that height you set for yourself. Common things people will say about pole vaulting: "isn't it scary?" - It's more exhilarating than scary "What if the pole breaks?" - All poles have weight requirements, so a pole rated 150 would only be safe for someone who weighs under 150 lbs. Also these poles are extremely elastic, being made of carbon fiber or fiber glass, and it is very rare that one would break. "I'm afraid of heights" - It's not that high.. well that's subjective
  4. Elektrik

    Personally I prefer building wall with working outlets and light switches over building a circuit in a lab, we do this in my Electric and Alternative Energy class. To me it just makes more sense, and I guess my time in physics is what gives me a good sense of how things like the electrical guts of a wall actually work. It seems like knowing how electrons flow through a system and through a switch is the basics for any circuit, functional or theoretical. However, I like that putting together a wall in this trades class that I take is actually quite challenging to understand still. Every basic wire running through the wall has 3 component wires: a hot, a neutral, and a ground. The hot is where the electrons flow when an appliance is in use, most of the time in AC (alternating current). The neutral is where the electrons flow to leave the circuit, and the ground is essentially like another neutral, but it is like a safety device. If a wire coating were to break, exposing the wire, instead of sending out random shocks starting a fire or electrocuting someone, the electrons will flow to the ground. And the wires are not as simple as connecting things with alligator clips, these are a bit more permanent. Sometimes you need to connect up to four wires at the same time all going to different places, this calls for a pig tail, which is essentially twisting the wires together so they all run to each other and then are capped off. This skill is both technical and requires a knowledge about how electrons will flow, and I really enjoy that.
  5. Levitating Animals

    This is a video of a levitating frog. Apparently a 10 Tesla magnetic coil is being used to lift him. This is possible because pretty much all organisms have small amounts of ferromagnetic materials inside of them. And no this does not hurt the frog because the force is spread out over the entire body, but he is probably freaking out a little bit inside.
  6. $1 Magnet vs $700 Magnet

    Some magnets are more, uh, magnetic than others? Yes some magnets have a stronger magnetic force than others. Iron, nickel and cobalt atoms have more electrons orbiting in one direction than the other. This means they produce smaller currents like electromagnets. However, ferromagnetic metals like iron, nickel and cobalt like to line up into larger areas. These areas will line up, north to south like any other magnet if you put them in a strong magnetic field. You can even line up these areas yourself, maybe you've done this before, you take an actual magnet and rub it one way across a ferrous material like a paperclip, and in doing so you will line up the inside structure of the clip, making it a little magnetic for a while until it gets jumbled up again. With very strong magnets, like rare earth magnets, the structure of the alloy tends to make it very hard to change the direction of the magnetic field. This means that more of them stay lined up, and you get a stronger magnet. So leave the heavy lifting to the rare earth magnet neodymium magnets and maybe just keep the fridge magnets around to hold up your physics grade sheet...
  7. Locker Shocker

    Today at my locker, I took a stand against lockers everywhere. Every morning coming into school I visit my locker first thing to put away my jacket. I have been needing to wear a jacket for longer this year because of the ceaseless cold we've been having here in New York. To get to the point, I would come in from the cold wearing my jacket and go to my locker to put it away for the day. Like rubbing your socks on a carpet to induce a charge on yourself, the act of taking off my fleece jacket rubs it on my shirt, inducing the charge. This charge is then discharged when I touch my locker to hang up the jacket. If anyone else has also experienced this, they will know what kind of fear it can bring a person. The shock is unpleasant, yet not overly painful, but surprising nonetheless. This happens because the jacket rubs electrons off on my body, and then touching the locker which is grounded causes those electrons to leave, and in quite a hurry. So today I rebelled against this by throwing my jacket in my locker and then closing it with my show, which is insulated or something. I haven't felt a shock yet today, I wonder if I still have excess electrons...
  8. Pendulums Are Weird

    I've been watching this gif for like 5 straight minutes
  9. HOW DO AIRCRAFT CARRIERS STAY AFLOAT??(INSANE)

    came for the boats, stayed for the science
  10. Generators, Enough Said

    Concise and profound, homerun.
  11. What's in a Name?

    1 Gauss = Mx/cm2 = 10-4T = a guy = /gous/ noun, a unit of magnetic induction 1 Tesla = measurements for magnetic fields = 104G = the SI unit of magnetic flux density = another guy 1 Newton = who knows? Wow look, these units are all named after some cool science guys, this is concurrent with many other units; Ampere, Kelvin, Pascal, Coulomb, Watt, Volt(a), Ohm, Farad(ay), Weber, Joule, and of course the Becquerel named after none other than Antoine Henri Becquerel. Seems like you gotta be a pretty smart science guy to have a unit named after you, wonder when we'll get the Nye... But anyway who is this "Maxwell" and why does he get to be known for the four equations; Gauss' Law, Gauss' Law for Magnetism, Faraday's Law, and Ampere's Law? Well apparently he was pretty cool, he pretty much found that electricity, magnetism and light are all different manifestations of the same phenomenon in his theory of Electromagnetic Radiation. And these equations have been called the "Second Great Unification in Physics". So yeah, you gotta be a rad science guy to have a unit or equation named after you. Comment down below what your unit would be called and what it would pertain to!
  12. Madman Speculations part 1 (WARNING: Actually Insane)

    This sounds very similar to a philosophical idea known as Occam's razor, you can look into it a bit, I don't trust myself to know enough about it to explain it here in the depths of the comment section.
  13. Overheating

    A common use of a brush motor is in a fan, for example the type that is used to keep my laptop from overheating. But what exactly is that preventing, and what does overheating do to a system such as a laptop? The fan helps to keep internal units cooled down, heat is created when there is resistance in the different hardware inside the computer. With all the units preforming very close to each other, a lot of heat can be generated. This is why keeping any appliance that generates a lot of resistance should be turned off when not in use, they are just draining unnecessary power and can create enough heat to cause a fire if given the proper (or rather improper) conditions. The fans used by such appliances serves to cool off the internal devices to a certain extent, and don't actually create that much heat themselves, which is useful. There are alternative ways of keeping devices cooled down, fans are one type, but there are also liquid cooling systems which are less common and even a phase change unit, which uses a cooling technique similar to a refrigerator.
  14. Electricity and You

    What exactly happens when electricity flows through a person, how does it effect their body and how can these effects be measured? People are conductive, electricity will flow through a person if able, and can do harm to a persons body, including burns and upsetting the heart. Small enough voltages might not conduct through your skin, the most susceptible place on your body is probably your tongue. In terms of Amps, 1 mA of current through your body would only cause tingling, but upwards of 75 mA could cause ventricular fibrillation, an unsteady heart rhythm that can lead to death. Amps of 1500 mA can start to burn internal organs. However amperage alone cannot determine whether a shock is deadly, factors like where the current flows through on your body are important too, this is why a small shock from an electrical shock can kill you if it travels through your heart, but a bolt of lightning can leave a person with only burns if it travels through the skin and into the ground.
  15. "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.

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