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Everything posted by kykan

  1. Money should not be spent to furthur study Particle Colliders. The united states economy is terrible and so money should not be wasted on information that we can live about. The information obviously has important benfits. We could feed children in ghana instead of spending money on science that is not needed. The money could go towards helping developing countries to provide water and food and items essential to live. We would unfortunately not have MRI's but kids in foreign countries are more important. The research for particles colliders is just too expensive to be worth it.
  2. kykan

    kicking a stool

  3. Most people know that the compass is used to navigate yourself around. However most don't know how it works. A compass is a magnet that is free to line up with magnetic field lines. The earth is basically a giant magnet with a north and south pole. However, the north pole of a compass is attracted to the geographic north pole of the earth.. therefore the geographic north pole of the earth is a magnetic south pole. The compass is able to navigate you around earth when you are lost because of magnetic field lines which run from north to south outside of the magnet. A north point of a compass will point towards wherever the magnetic field lines point. A compass is a good thing to bring with you when you travel or hike because it doesn't require electricity and the poles on earth will most likely never change, making the compass a consistent tool to have for an emergency. A compass is polarized which means it has two distinct and opposite ends. Regardless of where you are on earth, if you have a compass you can use magnetism to help you find your way back home!
  4. When you make toast in a toaster oven, you are using electrical power. Electrical power is the rate at which electrical energy is expended. The amount of electrical power your oven has is based on the amount of work it has to do and how much time it takes to make the toast. Toasters are measure in volts and they draw amps of current to work. The toaster is made up of a series of circuits. A circuit is a closed loop path through which current can flow. If a loop in the toaster oven somehow gets a disconnection then it will not longer be a closed loop path and current will be unable to flow therefore you will be toast-less. The current flows from high potential to low potential which is the opposite of electrons. The wires in the toaster oven most likely have low resistance because resistance opposes current flow. The electrical power from the outlet in your house travels to the toaster oven through currents and turns the potential energy into heat energy creating toast!
  5. When a librarian hears someone talking they tell them to be quiet. What is happening is they are hearing sound waves. Sound is a mechanical wave observed by detecting vibrations in the inner ear. Sound can travel across the library because sound can travel through air, water, wood and even steel. The waves that are produced when you talk are longitudinal waves. The speed of sound in air at STP is 331 m/s. So when you talk, it gets to the librarians very quickly. The sounds you make all have different frequencies and amplitudes. Librarians prefer sounds with low frequencies and low amplitudes. The longitudinal waves that you produce when you talk have compressions and rarefactions. If the librarian is on her way over to yell at you for talking, since she is approaching you, according to the Doppler Effect she will hear your voice at a higher frequency than your friends at your table. While in the library, create sound waves with very small amplitudes and you should be fine.
  6. Basketball has so much to do with physics! First off when you dribble a basketball, the force you put on the basketball, the basketball puts back on you. When you shoot a basketball its projectile motion. The ball goes is attracted to the ground because of gravity. Your shoes (hopefully) do not slip on the ground when you are running because of friction. When you fall and get a floor burn that is also due to friction and so painful. The amount of force you apply to the ball and the angle and location you shoot it from decides where it goes. During games ideally when you pass you want to put as much force as possible into it so its difficult for the other team to steal it. If you happen to miss your shot and the ball collides with the backboard or the rim, the momentum is conserved. That is why in warm-ups when everyone shoots at the same time its good to be aware of your surroundings because if that ball bounces right into your face it will not feel good. If you know your physics basketball can become a lot easier.
  7. If a hamster were to go surfing (which they couldn't do in Hawaii because hamsters are illegal there) then they would be surfing on waves. Waves are created from several pulses at regular time intervals and they carry energy. A pulse is a single disturbance which carries energy through a medium or through space. If a hamster was surfing and the wave reached a boundary such as rocks, it would reflect off the boundary and it would be inverted. However if the wave were to reach a soft or flexible boundary it would reflect but not invert. The waves in water that hamsters surf on are known as transverse waves. If the surfing hamster saw a shark they would scream and create a sound wave which is a longitudinal wave. If the hamster fell off its board and ended up underwater they could still scream because sound can travel through air, water, wood and even steel. Hopefully if the hamster has a good center of gravity they will not fall off the board!
  8. hamsters don't have to wear seatbelts in cars.
  9. interesting, hamsters also drink water.
  10. lacrosse is almost as cool as hamsters
  11. This is a long post, I suggest you shorten it up and spend more time playing with hamsters.
  12. This is a cute hamster and gravity is acting on him and when he runs in a wheel the force that keeps him from flying off is centripetal acceleration. This hamster is not magnetic. This hamster is also not a conductor of electricity. This hamster is still really cute though. This hamster is made up of atoms. Matter is made up of atoms. If you want to truly experience all aspects of physics buy a hamster.
  13. i like hamsters

    1. moritz.zoechling


      do prefer them baked or cooked?

    2. kykan


      Moritz... In America we don't eat hamsters

    3. moritz.zoechling
  14. wow neat-o you should try a post on hamsters
  15. Hamsters have tons to do with physics. Their food has chemical potential enegy and they eat it. If you drop a hamster (which I do not reccomend) the total mechanical energy will remain the same. When a hamster runs on its wheel it creates thermal energy. As a hamster falls freely, the kinetic energy will increase and the potential energy will decrease. When a hamster is running if it doubles its speed the kinetic energy of the hamster will be quadrupled. A hamsters gravitational energy depends on its position with respect to earth. Hamsters have lots of energy.
  16. The amount of work you do varies person to person, or person to hamster. You do work on an object when you move it. Work is the process of moving an object by applying a force. If I push my hamster, Pepper, 3 meters and apply a force of 2 newtons, then the work I did is 6 joules, since work is force multiplied by displacement. However when I apply the force of 2 newtons to pepper and she moves, it doesn’t seem like she is impacting me, however she is also applying a force of two newtons back on me. When you do work you transfer energy from one object to another therefore I am transferring my energy to Pepper the hamster.
  17. Total momentum of a system is constant. When two hamster balls collide, the momentum is conserved. A collision is an event in which two or more objects approach and interact strongly for a brief period of time. If a 4 kilogram hamster with a velocity of 2 m/s collides with another hamster who is 3 kilograms and has a velocity of 5 m/s they would have 23 kg*m/s. After the collision however they still have the same amount of momentum because momentum is conserved. Initial momentum equals final momentum.
  18. When you make Mac and Cheese you are coming face to face with many different types of energy. Energy is the capacity to do work or move an object. Energy can be transformed and this is proven when you make mac and cheese. The macaroni has chemical potential energy. And by using thermal energy the mac and cheese is cooked and energy is released. The macaroni is changed because of work energy. Work done on a system by external forces changes the energy system. Also if you hold a piece of macaroni in the air it has potential energy and when you drop it the kinetic energy increases as the potential energy decreases making the mechanical energy zero.
  19. When I think of springs, I think of trampolines. The more you stretch of compress a spring, the greater the force of the spring. If you think of a hamster jumping on a trampoline it wouldn’t go as high as an elephant jumping on the trampoline. The larger the force, the larger the distance. Work done in compressing the spring is stored as elastic potential energy. Therefore if a large person jumps down on the spring when they fly back up the trampoline has potential energy to send them far up. The larger the person, the more fun they will have! Since larger people compress the trampoline more, they will get more out of it. If you had a lot of free time you could calculate the spring constant of your trampoline. Say you weigh 60 Newtons, if the spring is moved 2 meters from its starting spot, than the spring constant would be 30 Newtons/Meter.
  20. Last night Ally and I took our 5 hour class so that we will be able to take our road test and hopefully get our license. A lot of the things that have to do with driver safety are things we learned about in physics class. Every time the instructor would say something that has to do with physics Ally and I would be like omg no way. The first thing that had to do with physics was a video we watched. The video went over why it is super important to wear your seatbelt and talked about accidents that were more severe than they had to be because the rider wasn't wearing a seatbelt. The video talked about projectile motion and why people when they get in accidents fly out of their cars and land certain places. Honestly I don't really ever wear my seatbelt but after that video I will every single time I am in a car. Also the instructor talked about snow and ice and how to drive safely on them and how it all has to do with friction. Driving on ice is super dangerous because you could slide across the ice and lose control of your car due to the lack of friction. Also it was talked about skidding when trying to come to a stop just on a plain road and why that happens and you can prevent it by making sure you have good tires that will have a lot of friction. The words velocity and acceleration were mentioned various times during a video we had to watch about drunk driving. The drunk drivers had no control of their velocity and some constantly accelerated the entire time they were driving!!! Driving safety is pretty much all about physics. If you know your physics it could really help you to avoid dangerous situations.
  21. kykan

    Jumping in Volleyball

    You play volleyball?! No way!!! Me too!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I didn't know you did! Neat-o!
  22. kykan

    Physics of Sitting

    You do sit a lot Jaclyn. Good post.
  23. Wow ukulele.. what an interesting instrument you should teach my how to play.
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