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SJamison

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Blog Entries posted by SJamison

  1. SJamison

    The Helmet

    By SJamison,

    It is better to not get hit in the head but sometimes it just ends up that way. Hockey helmets are designed like most helmets with the ability to absorb most of the energy from impact. The thing that I believe separates a hockey helmet from a standard football helmet is the fact that the top of the line hockey helmet rotates a little around your head without jerking your head in the initial impact. (I don't Know enough about football equipment to speak on behalf of the equipment) However, most injuries that occur to the head are caused from the initial jerk of the head when the brain remains still for a moment while the head moves. As this movement happens it yanks on blood vessels and nerves causing strain on the head and if bad enough an actual brain bleed or a concussion. This is why I wear the top of the line helmet now because previously having a really bad concussion and now I must wear it to prevent future ones. With this helmet no one is safe from every hit but with the ability to rotate a little around your head it gives you a slight edge over other helmets.  
  2. SJamison

    The kronwall

    By SJamison,

    Kronwall is one of my favorite defenseman in the NHL. The reason for this being his huge hits that he has (shown below) and this great defensive play. The reason for hit great hits is because he combines his massive self with a good amount of speed to completely wreck players. The main reason this is so effective is because of a fundamental aspect of physics which is the idea that momentum must be conserved. Since he catches his opponent off guard it allows him to build speed and use his mass to collide with the other played and cause for him to continue on in his original direction. Even though his speed gets slowed significantly from this it is because he has just collided with another massive player. But, since he has more speed and a better center of mass this opponent gets "Kronwalled"       
     
  3. SJamison

    Turbo = Fun

    By SJamison,

    A turbo system in a car is a pretty simple but genius idea. It uses the gas exhaust from a piston engine to spin the turbine in the turbo system which then pumps more air into the cylinders of the car, allowing the car to burn more fuel each second. As a result of a turbo system, your car will burn more gas but because of this the turbo will provide the car with more power due to the increased revolutions of the pistons. By installing a turbo in your car you will be able to increase your cars over all speed. But without an anti lag system in your car there will a turbo lag meaning that when you press on the accelerator it will take a few seconds before you feel the full effect of the turbo.  
  4. SJamison

    Underwater Explosion

    By SJamison,

    When an explosive goes off under water the shock wave carries a lot further than it would if it were on land and in the air. This is cool because water has a higher density than air so this mean that it is harder to move or has higher inertia. And we know that inertia is a measure of how restive something is to acceleration. This means that after the explosion goes off the shock wave from that will carry further through the water with smaller deceleration. From this we know that this shock wave will be carried without losing speed and keeping it's high kinetic energy. As a result of this if you are anywhere near an explosion in the water you will be feeling most of the energy from the explosion. This energy from the explosion depending on the size could have enough energy to shatter every bone in your body. I would suggest getting out of the water if you were in this situation but, chances are you would be to late.  
  5. SJamison

    whistle

    By SJamison,

    How does a whistle work? In order for the typical whistle to work you need air streams. In order to get the high pitched noise that you hear coming out of a whistle you need the air steams to interact or cross paths. This is done through the round part of the whistle, as you blow into the whistle the air travels through the loop and up again (as seen in pic below) this allows the air to cross paths with the new air coming in. At this point where the air stream crosses itself again becomes a high pressure point and the air that escapes is what makes the noise. Whistle pitch and frequency depends on the length of the whistle, the longer it is the lower the sound will be.  There are other types of whistles that work in a similar concept but vary slightly. The image below is the standard whistle that I am talking about.

  6. SJamison
    With this wonderful weather comes wonderful roads. From driving, it can be a very dangerous with the coefficient of friction much smaller making roads very slippery. Thinking about our previous unit with rotational and transnational motion it can relate a lot with a car in the snow. When starting up the tires often spin when very slick out causing for more rotational movement rather then the wanted transnational. And then as you get going you begin to build more transnational rather than rotational. So for every one out there driving be careful!!!  
  7. SJamison
    So as we all know there is no gravity in space so, what would happen when you want to wring out a wet towel there? I fond this question very interesting when talking with friends so I thought I would take a deeper look into it. When you have a very wet towel and go to wring it out, the water is not just going to fall off like it does on earth. Instead because of the  waters surface tension and lack of gravity in space, the water will float around the surface of the towel  forming a tube shape around it. The water will stay like this until further actions are taken. I found this very interesting because you don't think of gravity effecting such small actions like wringing out a wet object until it is no longer present. After looking at this it would be cool to see how they get the water out of something super wet in space since you cannot just wring it out. The video below shows what happens when you try to wring out a towel in space. 
     

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