.... Sounds easy enough, right!, well WRONG!!. From the moment I hit the water, my experience was much less than fun. I quickly sank to the bottom into a new world, with unfamiliar dangers. I really wasn't ready for this experience. I was disorientated, causing me to panic, which shortened the length of my dive, not to mention my air supply. Let's just say I would not do that again. To start exploring the underwater world, one must first master a few skills. Certification is the first step of learning to dive. From qualified professionals one must learn how to use the equipment, safety precautions, and the best places to dive. This paper is designed to h .....

.... the situation in eastern Europe: first, what the real problems are and how and why they were caused. Second, the consequences of these environmental problems on the people and environment of the region. Third, the future prospects of the region: what has to be done and the chances of it happening, and what has been done up to this point to indicate what the future holds. Finally, it should be pointed out at this time that the pollution that is discussed here is only related to pollution that directly harms people and the environment they live in, not pollution like carbon dioxide or greenhouse gases or other factors concerned with the global warming issue. The .....

.... usually after a symptom-free period that varies in duration with the amount inhaled. Chemically induced acute lung injury by these groups of agents involves a permeability defect in the blood-air-barrier (the alveolar-capillary membrane); however, the precise mechanisms of toxicity remain an enigma. The U.S. produces over a billion pounds of phosgene (CG) per year for industrial uses; however, we do not stockpile this agent for military use. Perfluoroisobutylene (PFIB) is a toxic pyrolysis product of tetrafluoroethylene polymers encountered in military materiel (e.g., Teflon7, found in the interior of many military vehicles). The oxides of nitrogen (NOxs) are .....

.... and they were known as acute exanthems or “a disease characterized by an eruption or rash, from the Latin and Greek word exanthema, meaning ‘to break out,’ or, originally, ‘to bloom.’” Many people were misdiagnosed due to the similarities between these diseases, and the fact that they can occur in milder or more sever forms leading to an overlap of the most obvious symptoms. (7) Chickenpox mostly occurs in children classifying it as a childhood disease although it can occur in adults who are not yet immune to it. This could lead to the belief of chickenpox being one of the oldest diseases. Since the chickenpox infection has two phases, one most common du .....

.... but not touching the sides or bottom of the test tube. Use a clamp to hold the thermometer in place. 5. Ignite the Bunsen burner and using direct heat melt the naphthalene powder until it completely turns to a liquid. When the temperature reaches approximately 90o Celsius, stop heating. 6. Observe the change in temperature from 90o to 70o Celsius, recording the temperature at regular intervals, preferably 15 seconds. This data will be used to make a chart later. 7. Once the temperature has fallen to 70o, melt the naphthalene which is now frozen to remove the thermometer. Properly dispose of the naphthalene liquid as instructed by the teacher. IV .....

.... on the shuttle, to the detriment of other, unmanned vehicles and missions. The first space shuttle mission, piloted by John W. Young and Robert Crippen aboard the orbiter Columbia, was launched on April 12, 1981. It was a test flight flown without payload in the orbiter's cargo bay. The fifth space shuttle flight was the first operational mission; the astronauts in the Columbia deployed two commercial communications satellites from November 11 to 16, 1982. Later memorable flights included the seventh, whose crew included the first U.S. woman astronaut, Sally K. Ride; the ninth mission, November 28-December 8, 1983, which carried the first of the Europea .....

.... for the drug surpasses other interests- including the need for food, sleep, friends, sex, and family. The effects of this drug are long-lasting. Food and water become unimportant after taking it. Seizures and death can occur. Meth can cause: angry, hostile, and anxious feelings, violent behaviors, confusion, mental illness, increased physical activity, loss of appetite, increased heart rate, inability to sleep, strokes can occur, chest pain, increased blood pressure, irregular heart rate, aids and HIV through the use of needles, dependence, tolerance, addiction, and can cause psychosis. The use of Meth is going up. In 1995, 3.9% of high scho .....

.... happens they cannot keep from collapsing. After stars collapse, they start rotating and as they are spinning, their gravity becomes stronger causing them to shrink. As the object becomes smaller, it starts spinning faster and faster. Then the core compacts into a mathematical point with virtually zero volume, where it is said to have infinite density. This is referred to as a singularity. When this happens, escape would require a velocity greater than the speed of light. No object can reach the speed of light. The distance from the black hole at which the escape velocity is just equal to the speed of light is called the event horizon. Anything, including ligh .....