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Science Online Essays


The Big Bang And Steady State Models
Number of words: 1285 | Number of pages: 5

... no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is the same everywhere on the large scale, at all times.2 It maintains the same average density of matter forever. There are observational evidences found that can prove the Big Bang model is more reasonable than the Steady State model. First, the redshifts of distant galaxies. Redshift is a Doppler effect which states that if a galaxy is moving away, the spectral line of that galaxy observed will have a shift to the red end. The faster the galaxy moves, the more shift it has. If the galaxy is moving closer, the spectral li ...

Nuclear Strikes
Number of words: 2401 | Number of pages: 9

... the United States but numerous times in Europe.(www.pbs.org) As a matter of fact, the Russians say someone stole a bomb simulator, which will explode and make mushroom cloud but has no nuclear component.(Wilkie) People know that despite efforts to keep control on the old Soviet stockpile and waste, terrorists are getting the plutonium and uranium needed to make nuclear weapons to kill masses of people. This is kind of the history of the nuclear & atomic bomb: (all from Williams) The first atomic bomb was thought up by Albert Einstein in the late 30's. In 1942 Enrico Fermi brought about first nuclear reaction with isotope Uranium 235. From this the Manhattan Project was brought about and too ...

The Problem With The Amount Of Trash In The United States
Number of words: 474 | Number of pages: 2

... are throwing things on the floor all the time and recycling has not been done as much as it should be. In New York city we have one of the world’s most largest and most crowded landfills which is proven in the article. Fresh Kills landfill, on Staten Island is extremely big but will be closed in a few years. I New York State there were 1600 landfills in the 1960’s and today the figure is in the hundreds. Trash is a big problem in our community and is still increasing. The problem of trash needs to be fixed and there are some things that we can do. One of the things we can do to help this problem is make less trash. Many things are overpackaged and if there is less garbage ther ...

Buoyant Forces
Number of words: 281 | Number of pages: 2

... was .98 newtons. Then next step was to measure the apparent weight of the cylinder when it is completely submerged in a bath of water using the formula Wa=ma*g , this was found to be 88.5grams. Knowing these two numbers, the bouyant force that the water places on the object can be calculated using the formula Fb=W-Wa , Wa=.8673n W=.98n Fb=.1127n Part 2 of this lab consisted of weighing an empty cup, which was 44grams. And then filling another cup up to a certain point the if any more water was added, it would spill out of a little opening in the cup, the water spilled out could be caught in the first cup. This is done so that the water spilled out can be weighed and compared to a c ...

Comets
Number of words: 431 | Number of pages: 2

... forces cause these materials to move away from the head of the comet and in the opposite direction from the sun. According to Charles A. Schweighauser in his book, entitled Astronomy from A to Z: A Dictionary of Celestial Objects and Ideas, he states that we see comet heads and tails because they not only reflect sunlight, but they also fluoresce—give off their own light—when are near the sun. The tails from the comet may be up to 150 million kilometers long each or together. have a predictable orbit. There are one thousand that have been charted. Some go by the sun once and others, which are called periodic , pass the sun repeatedly following a predicable pattern. I have chose ...

Yeast
Number of words: 657 | Number of pages: 3

... this appeals most to the , causing it to grow at a rapid rate. Just like any other organism, in order for to survive they need to have a significant amount of nutrition. Unlike plants, lacks the chlorophyll needed to create its own food. It feeds on the sugar of many different resources to stay alive. Some of the most popular are different fruits and nectars. Also, molasses seems to be a prime choice as the feeding ground for . When the yeast has finished retrieving nutrients from the sugars, it produces enzymes which are used in many different ways. Some yeast break down sugar in alcohol. This is what is known as fermentation. Fermentation is heavily involved in ...

Alchemy
Number of words: 657 | Number of pages: 3

... so they could become wealthier then they already were. Basically they saw easy money and would waste their lives and money to find out how to get it. There was another side to alchemy them just changing lead into gold, people not only wanted to be rich but they also wanted to live forever. The Elixir was the substance that would extend the life of the user. They thought that the elixir would start its own transformation in the human body, incorruptibility and hence longevity. (Halleux 140) By making these substances would sometimes get the opposite effect of what they were intended, because sometimes unwittingly they would make a poison instead of “The Elixir of Life”. Most of the times ...

Bang, The Life Cycle Begins
Number of words: 237 | Number of pages: 1

... dense point concluding the life of the universe. You would think of this as the end, but only an explosion is needed to wake up and give life to a new universe. Therefore, trapped forever in the cycle of rebirth. As humans we also travel through a cycle of rebirth according to the Hindu religion. We are all trapped on the Wheel of Samsara trying to break free. It is only possible to escape through the laws of Karma. Karma is simply how you act in this life determines what you are after your rebirth. For example, if you live each life being the best Hindu you possible can eventually your soul or Atman will be released and reach liberation. If you decide to go to the other e ...

Desktop Videoconferencing
Number of words: 3016 | Number of pages: 11

... convenience of a different means of communication. Videoconferencing is a type of conferencing in which video cameras and microphones capture sight and sound for transmission over a communications network. Videoconferencing makes it possible to conduct meetings with participation of groups who are hundreds and thousands of miles apart (Senn, 1998). As Joseph Jesson an information technology consultant at Amoco in Chicago put it the notion of was highlighted at the 1964 Worlds Fair in New York. It is now 1999 and the promises of upgraded are still on the rise. In the year of 2000 there will still be promises of upgrades as it has been with computers. As Videoconferencing has made it ...

Genetic Engineering. 2
Number of words: 2977 | Number of pages: 11

... moral and safety questions it brings forth, the blanket of fear covering this remarkable technical miracle can be lifted. The first step to understanding genetic engineering, and embracing its possibilities for society, is to obtain a rough knowledge base of its history and method. The basis for altering the evolutionary process is dependent on the understanding of how individuals pass on characteristics to their offspring. Genetics achieved its first foothold on the secrets of nature's evolutionary process when an Austrian monk named Gregor Mendel developed the first "laws of heredity." Using these laws, scientists studied the characteristics of organisms for most of the next one hundred ...

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