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JBrown3

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  1. JBrown3
    Few people are surprised by the fact that an asteroid, the size of Mt. Everest, could do a lot of damage when it hits the Earth. And it is not really surprising that such bodies are out there; every few years, there is a newspaper headline about a "near miss" in which an object misses the Earth by "only a few million miles." But why should an asteroid impact cause an explosion? It was made of rock, not dynamite. And why such a big explosion? But then, what is an explosion, after all?

    An explosion occurs when a great deal of energy is "released" into a small volume in a very short period of time. It doesn't matter what the source of the energy is; it could be chemical (stored in food), or kinetic (the result of motion).

    However, nuclear bombs are the most devastating of them all and can cause some serious damage in its surroundings The dominant effects of a nuclear weapon (the blast and thermal radiation) are the same physical damage mechanisms as conventional explosives, but the energy produced by a nuclear explosive is millions of times more per gram and the temperatures reached are in the tens of mega kelvins. Nuclear weapons are quite different from regular weapons because of the huge amount of explosive energy they can put out and the different kinds of effects they make, like high temperatures and nuclear radiation.
    The devastating impact of the explosion does not stop after the initial blast, as with regular explosives. A cloud of nuclear radiation travels from the epicenter of the explosion, causing an impact to lifeforms even after the heat waves have ceased. The radiation can cause genetic mutation, radiation poisoning, and death. because of this harmful effects, during the cold war people were traumatized to live in a time period where atom bombs seemed to make the power of the country greater and unfortunately it wasnt a success
  2. JBrown3

    Nuclear fusion

    By JBrown3,

    http://www.youtube.com/watch?v=a19fhhJcs1E


    Although a bit lengthly the significance of this video takes a tour of the life and death of starts and what they have to offer in the universe. Also, some facts about stars include that it is large celestial body composed of gravitationally contained hot gases emitting electromagnetic radiation, especially light, as a result of nuclear reactions inside the star.

    Stars are wondrous things that we know little about because of our limitations in technology. However, we learn more and more each day. they come in a variety of colors and sizes. Blue stars are hotter then white stars, white stars are hotter then yellow stars. Red stars are the coolest

    Ive always wondered what would happen if the sun completely blew up while humans are still alive to witness it
  3. JBrown3
    We all know that golf isnt the most fun sport in the world but what this video reveals is the components that make up the physics of the sport and surprisingly it is very interesting. First off, i want to give a little information about the mechanics of golf, for example, a backspin imparted on a golf ball will cause the ball to gain loft and stay in the air longer. As the ball spins in the air, it directs more airflow up over the top of it and then downward behind it.

    This means that the air above the ball is moving faster than the air below the ball, and because of the pressure difference, the ball has additional force pushing it up, which helps it stay in the air for a longer period of time. This spin also helps golfers produce more accurate shots because with a backspin imparted on the ball, it drops quicker toward the end of the shot. And after hitting the ground, the backspin helps slow the ball more quickly.

    Also, different golf clubs are used to transfer certain amounts of energy onto the golf ball like the drivers have a club head significantly heavier than that of any of the other clubs. These are generally used for the first shot of the hole and will hit the ball the furthest due to a larger transfer of energy from the more massive club head to the ball. Anyways, this video should interest you in the components of golf.


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