... The speed with which you need to throw the rock in order that it just barely escapes the planet's gravity is called the "escape velocity." As you would expect, the escape velocity depends on the mass of the planet: if the planet is extremely massive, then its gravity is very strong, and the escape velocity is high. A lighter planet would have a smaller escape velocity. The escape velocity also depends on how far you are from the planet's center: the closer you are, the higher the escape velocity . The Earth's escape velocity is 11.2 kilometers per second (about 25,000 M.P.H.), while the Moon's is only 2.4 kilometers per second (about 5300 M.P.H.).We cannot see i ...
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... water zone, in a thermally stratied body of water, in which the temperature decreases rapidly with depth. This depression of the thermocline has great effects on the worlds fishing industry. The cutting of nutrient rich therocline water reduces the growth of algae, which in trun, collapses the food chain. Thus, leaving our worlds subsistence and commercial fishermen with out food and money. With the already descendeing food chain on our earth, the warming water also effects the atmosphere, resulting in more extreme temperatures, more rain, and more drought periods, costing more money to our already debted economy, and the world. An example (demonstrated here b ...
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... four viruses: Zaire, Sudan, Reston and Tai are the five different viruses that have been known to cause disease in humans, while Reston only causes disease within monkeys. Filoviruses, arenaviruses, flaviruses, and bunyaviruses are the viruses responsible for causing viral hemorrhagic fevers. All forms of virus of viral hemorrhagic fever begin with fever and muscle aches. These diseases usually progress until the patient becomes very ill with respiratory problems, severe bleeding, kidney malfunctions, and shock. The conclusions of the viral hemorrhagic fever can range from a mild illness to death (www.cdc.gov/nci..brochures/inf.html, 1995). viruses are spread th ...
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... it takes seven trucks to deliver the same amount of paper as one plastic delivering truck. Talk about a big waste of gas. Plastic bags cost about ¼ of a cent to make, while paper cost close to 3 cents. This is money we save as well as the store owner. This is a lot of money that is going to waste considering that plastic bags are so much more practical then paper. You can use them for lots of other things. You can take on trips to the grocery store, your can protect dry clothing from wet towels in an exercise bag. You can line your house hold waste basket with them, you tote dry shoes to work on rainy days. Hold plastic, aluminum and glass for recycling. ...
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... other cultures, appreciate architecture and engineering, and learn about past accomplishments. Furthermore, they offer educational and recreational opportunities and provide links to our past. People have lived in North America for at least 12,000 years. Archaeologists and historians have divided this time span into prehistoric and historic periods. The prehistoric period extends from the earliest arrival of humans in North America to the coming of the European explorers. The historic period begins with the arrival of these explorers and continues up to the present. As you walk across public land, something on the ground catches your eye. You pick up a piece ...
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... quickly from exercise than a natural athlete, so they can return to the gym sooner for another workout. So that means less work equals more muscle gain, compared to working out normally with no supplement. Who wouldn’t want that? Think about all the pain you wouldn’t have to go through doing all those reps. With a performance enhancing drug, you could do even less, get the same results and even better. Today more than ever, performance enhancing drugs and supplements are being abused. It is estimated that 99% of all professional bodybuilders are using steroids, or some type of performance enhancing drug. Many people are drawn to these “bul ...
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... directed toward those who reside with the dog which makes affected dogs difficult to live with (Horwitz 42). According to Dodman, traditional treatments of dominance-related aggression include an increase in exercise, brushing up on obedience training, and ceasing to engage in any rough play or wrestling (35) . More recently, however, drugs such as Prozac have been used as treatment. Dodman says that Prozac is,"...extremely effective at curtailing dominance-related aggression...enabling owners to quickly gain the upper hand,"(34). Another type of aggression found in canines is seizure-related aggression. Symptoms of seizure-related aggression include a pre-agg ...
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... of a substance. This brings into play the processes of diffusion, osmosis, and active transport, all of which involve only small simple molecules. Diffusion is the movement of a substance from a region of high concentration, to a region of low concentration of that substance. In other words, a movement down the concentration gradient. Osmosis is very similar to diffusion, however it involves the concentration of water. Osmosis, like diffusion, is a passive process, and does not require energy to occur. Active transport does require energy though, as it involves movement up the concentration gradient. This involves protein carrier molecules binding to the s ...
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... and precisely from one flower to another of The same species, thus promoting out crossing. Many angiosperms display other modes of pollination, including self-pollination. Evolutionary Origins Plants derived from an aquatic ancestor, but the evolution of their conducting tissues, cuticle, stomata, and seeds has made them progressively less dependent on water. The oldest plant fossils date from the Silurian Period, some 430 million years ago. The common ancestor of plants was a green alga. The similarity of the members of these two groups can be demonstrated by their photosynthetic pigments (chlorophyll a and b,) carotenoids); chief storage product (sta ...
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... Other examples of folded mountains are the Rockies, Himalayas, Appalayas, and the Andes. Fault-block mountains are formed when one plate pushes or pulls away from another plate. In the Earth, hot currents of magma or molten rock may well up and crack the weakened crust above. As the crust cracks, blocks of rock rise or fall forming Fault-block mountains. Examples of these mountains are the Sierra Nevada in California and the Grand Tetons in Wyoming. Dome mountains are formed by the same kind of molten rock that forms Volcanic mountains. As magma comes up in a crack in the Earth’s crust, it does not come to the surface, but the molten rock pushes ...
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