Essays on Science

... expect Earth's temperature to increase by any-where from three to nine degrees. The Vostok record confirms that," says Harte. The grid is divided into ten sections. Each of the ten sections covers thirty square yards of the meadow. The infarared lamps will heat every other section by 2.5 degrees. The unheated sections in between allow researchers to compare the efects of the lamps with the regular state of the meadow. One time a week, Harte will take gas samples from buckets turned upside down for ten minutes at a time on both the heated and unheated strips through fitted nipples at the bottoms of the buckets by syringes, then analyze them with a gas ...

... to addressing the urgent health problems of our era, such as heart disease, cancer, stroke, AIDS and birth defects." He goes on further to say that animal experiments can not only mislead researchers but even contribute to illnesses or deaths by failing to predict any toxic effect on drugs. The majority of animals in laboratories are used for genetic manipulation, surgical intervention or injection of foreign substances. Researchers produce solutions from these animal "models" and are adapting them to human conditions. Unfortunately, these animal "models" can't always be connected with the human body thus creating problems. Many times, researchers induc ...

... and improve our global competitiveness. They cut America's demand for imported oil by nearly 100 million barrels a year—reducing our dependence on foreign oil suppliers and cutting our trade deficit. The future looks even better. Advanced-design nuclear power plants are now being developed—quicker and less costly to build, better performing, and even safer than today's plants. These plants will supply our children's and grandchildren's electricity—while helping to protect their environment. Cheers For Energy Efficiency We Americans should be proud of ourselves. Since the 1973 oil embargo, we've learned to use energy far more effic ...

... per year, minimising the global warming effect on the atmosphere. Carbon dioxide is responsible for half of man made gases contributing to the Greenhouse Effect, and has sparked action from the UN Intergovernment Panel on Climate Change. Their consensus is a concern for the environment in the next century if fossil fuels continue to be used, even at present global levels. The Panel claims that for carbon dioxide to be stabilised to safe levels, a 50-80% reduction in all emissions would be required. The United Nations has predicted a world population growth from 5.5 billion to 8.5 billion by the year 2025, meaning demand for energy will increase. Nuclear powe ...

... new, crescent, half, gibbous, and new moon. The earth rotates in its axis once a day. The earth is a sphere shaped object. Its diameter is 12,750 km (7,923miles). It takes 23 hours and 56 minutes to rotate once, which is approximately one day. The sun orbits the sun ever 365.25 days. The average surface temperature is 15 degrees. The distance from the sun is 150million km (93 million miles). The sun is 150million km (93 million miles) away from earth. It is 1.4million km (864,000 miles) in diameter. Its surface temperature is 5,800 degrees Celsius (10,472 degrees Fahrenheit). As the earth rotates on its axis the sun can only shine at one side at a time. When ...

... primordial cells and evolved along with them. A mitochondrian’s main purpose is to burn energy through a slow method of combustion, which will consume as much air to burn as fire will, just to break down nutrients into simpler substances. These simpler molecules then bond with the atoms that will need the energy to function. Then, enzymes in the mitochondrion break up the atoms and then recapture them again. This time, the energy atoms will be bonded in a different molecule to form ATP, or adenosine triphosphate. ATP has an adenosine core and three phosphates attached to it, hence its name. These phosphates will store the new energy. ATP can travel throu ...

... the United States of America is certain and add the suggestion that he should, on his own initiative , invite Japan to immediate adherence and at the same time mediate between Japan and ourselves. Please call the President's attention to the fact that the ruthless employment of our submarines now follows the prospect of compelling England in a few months to make peace" - ZIMMERMANN Considering this telegram was sent to Mexico, it shows Mexican importance in this war. Mexico had two thousand miles of undefended coastline on the Pacific . Her northern boarder with the United States stretched for twelve hundred miles from Texas to California, touching all along all al ...

... was fairly clean. The use of smokestacks and the burning of fuels put many pollutants in the air during this period of time. The increased use of fossil fuels today also builds on this. There have been many attempts at stopping air pollution. The Clean Air Acts were effective for a little while. They made using some polluting substances illegal. This did not work because people simply did not listen. Solar Energy is another attempted solution. This type of energy is good because it is an alternative energy source to coal and other polluting fossil fuels. The problem with solar energy is that it is extremely expensive, but it has been used extensively through ...

... of knowledge. Also Japanese the teaching of computer science has been developed in the same period. During 1955 to 1959, some universities developed their own computers. They organized short courses. Computer technology comes from the U.S. to Japan. Usually a technology is developed in the U.S.. After that, it comes to Japan so Japanese is late at all and most manuals are written in English so it is easy to lean computer for people who speak English; however, most Japanese people who live in Japan cannot understand English so they have to translate English to Japanese to understand the manuals. It needs much time. Usually Japanese universities teach computer to ...

... located in the cement between the fibers consisting of calcium phosphate [85%]; Calcium carbonate [10%] ; others [5%] which give it the hardness and rigidity. Other than providing the rigid infrastructure, it protects vital organs like the brain], serves as a complex lever system, acts as a storage area for calcium which is vital for human metabolism, houses the bone marrow within its mid cavity and to top it all it is capable of changing its architecture and mass in response to outside and inner stress. It is this dynamic remodeling of bone which is of primary interest in microgravity. To feel the impact of this dynamicity it should be noted that a bone re ...