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Science Online Essays


Gps
Number of words: 1215 | Number of pages: 5

... doesn't mean that we won't get lost, but it is more difficult to get lost, and it's definetly easier to find your way around if you do get lost. When get in your car, all you have to do is type in your destination and the computer will show you where your destination is, aswell as how to get there and the easiest and fastest way to get there. These systems are being used to make everything more convenient, easier, safer, and quicker for not only the user of the navigation system but everyone else too; for example, if someone is hurt, or even if a house is on fire, 911 will dispatch vehicles containing computers hooked up to the , this will make finding the accident, quicker easier and ...

Holograms
Number of words: 1072 | Number of pages: 4

... can just move your head to one side. The apple seems to "move" out of the way so you can see the orange or even the back of the apple. If that seems a bit obvious, just try looking behind something in a regular photograph! You can't, because the photograph can't reproduce the infinitely complicated waves of light reflected by objects; the lens of a camera can only focus those waves into a flat, 2-D image. But a hologram can capture a 3-D image so lifelike that you can look around the image of the apple to an orange in the background -and it's all thanks to the special kind of light waves produced by a laser. "Normal" white light from the sun or a lightbulb is a combination of ever ...

Lsd
Number of words: 4236 | Number of pages: 16

... it. is considered to be one of, if not the, most potent hallucinogenic drug known. Small doses of (1/2 - 2 ug/kg body weight) result in a number of system wide effects that could be classified into somatic, psychological, cognitive, and perceptual categories. These effects can last between 5 and 14 hours. Table 1: Effects of 1, 2, 3 Somatic Psychological Cognitive Perceptual mydriasis hallucinations disturbed thought processes ...

Darwin's Theory And Modern Genetics
Number of words: 324 | Number of pages: 2

... This discovery led to modern genetics. We now know chromosomes carry valuable information that determines characteristics in living species. When you put these two discoveries together you really understand how animals have evolved to their currant state. When animals are born the have traits that help them live or inhibit their ability to live. If the die they cannot mate with other animals therefore they don’t pass on the traits that killed them. The animals that live pass on the chromosomes that helped them survive. In human populations this is also evident. In some areas of the world blonde hair is a common characteristic. These people have been breeding in the same popu ...

Ebola Virus
Number of words: 1098 | Number of pages: 4

... was really Ebola. The first recorded outbreak of the Zaire string of the Ebola virus was in Zaire, in 1976. The doctors didn't know how to treat it and that meant that they didn't know how to contain it either. As infected people met in public places the virus spread. In Western Sudan, the same year, the Sudan string of the Ebola virus emerged with similar results. Both casts together had about a total of 550 infections and around 340 deaths (about 60% death rate). The virus' then lay dormant till 1979, when Sudan was again hit with 34 infections and 22 deaths. In the outbreak, as before, the fatality rate was about 60% (Mussillami, www.lfc.edu) In 1987 a new string of the ...

International Space Station
Number of words: 2523 | Number of pages: 10

... It was in 1984 when the first construction plan was unveiled, called “Freedom.” A “power tower” concept was designed, which is a long slender unit that would be the center of the entire structure. This tower would be a long, narrow piece of latticework, chosen for its stability and to avoid the use of every day thrusts to maintain its altitude. All the laboratory modules would then surround the “power tower.” A free-flyer module would be used to conduct experiments in incessant, stable conditions away form the main tower structure. The “power tower” concept required too many parts and shuttle missions for it to be completed. Tha ...

Solar Energy: An Alternative Energy
Number of words: 290 | Number of pages: 2

... energy produced in the sun as a result of a constant nuclear fusion reaction that is taking place. The amount of energy at the solar constant, which is at outer edge of the earth's atmosphere, is two calories per minute per cm squared. A calorie is the amount of energy needed to raise one gram of water one degree Celsius. If we could efficiently harness the energy bombarding the earth for twenty-four hours we could power New York for a year. Unfortunately the photovoltaic cells that change the energy into electricity are so inefficient that it would take twenty-five years to pay for it's self in output. There many uses of solar energy. Some homes rely fully on the power of the sun ...

Electronics- Logic Probe
Number of words: 428 | Number of pages: 2

... in attaching the clips to safe voltages; you may want to first use a Volt Meter (Digital Multi Meter) to verify the hook up points have good voltages. The four diodes protect the IC from reverse polarity. Capacitor C1 prevents transient voltage from affecting the logic probe when the black lead is not connected. Pin 5 of the 555 IC is grounded through resistor R1. The logic probe will indicate a HIGH for 2V or greater, and a LOW for 0.8V or less. To use this logic probe, follow the procedure. 1. Connect red power lead to +5V of circuit under test. 2. Connect black lead to ground of circuit under test. 3. Touch probe tip to point in digital circuit to be tested. 4. One or the other LED ...

Bipolar Disorder 4
Number of words: 931 | Number of pages: 4

... between. Some individuals may display mixed symptoms of both mania and depression at the same time, while others may have fewer symptoms of mania (also referred to as hypomania). The type severity, and duration of mood episodes may vary. Some individuals may experience excessive mania, or excessive depression, and some may experience an equal amount of both. The mood episodes can last for a few days to as long as several months, especially when left untreated or not treated effectively. Usually a person with bipolar disorder can expect an average of ten episodes of either mania or depression in their lifetime, but some individuals experience much more frequent mood episodes. Some ch ...

Depression 5
Number of words: 2664 | Number of pages: 10

... roles in over 72 films is clinically depressed. During a time when Rod was down he wrote a letter to his wife and son: I want to die; I don’t want to move. I have no feeling for movement. To be left alone, to disappear. Not to be bothered with washing, shaving, talking, walking, going to the bathroom. If only to get out of this tunnel and heavy darkness, cold and oily, constantly pressing against my brain and being (Carter, 39) What would cause highly successful people like Rod Steiger, Kathy Cronkite, Patty Duke, even television reporter Mike Wallace and British Prime Minister Sir Winston Churchill to develop depression? Eric Hoffer described depression best when he said, “The worl ...

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