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Search results 651 - 660 of 1022 matching essays
- 651: A Discussion On Earthquakes
- ... million in damage just in electric utility equipment in the Los Angeles area alone. The U. S. Geological Survey (USGS) first began forecasting aftershocks following the 1989 magnitude 7.1 Loma Prieta, California, earthquake. By studying previous earthquakes, scientists had detected patterns in the way aftershocks decrease in number and magnitude with time. With such knowledge, scientists can estimate the daily odds for the occurrence of damaging aftershocks following large California ...
- 652: Remotely Operated Vehicles
- ... do an underwater function. Submersible's and rov's are important to Marine biologists so they can study underwater creatures. Geologists can use them to find out more about the evolution of the Earth by studying the ocean floor. The ocean holds some minerals that are becoming scarce on the Earth's surface. If we can set up mining stations under the water it would also provide many jobs. Undersea manufacturing ...
- 653: The Atom
- ... that glass tubing held "at a distance of some feet from the discharge-tube" fluoresced just as the wall of the tube itself did when bombarded with cathode rays, but he was too intent on studying the rays themselves to purse the cause. Rontgen isolated the effect by covering his cathode-ray tube with black paper. When a nearby screen of florescent material still glowed he realized that whatever was causing ...
- 654: Silicon
- ... contained 18,000 vacuum tubes, weighed 50 tins, and required 140 kilowatts of power. By the 1930's, researchers at the Bell Telephone Laboratories were looking for a replacement for the vacuum tube. They began studying the electrical properties of semiconductors which are non-metallic substances, such as silicon, that are neither conductors of electricity, like metal, nor insulators like wood, but whose electrical properties lie between these extremes. By 1947 ...
- 655: Plutonium
- ... uses as well. For example, the original plutonium isotope, Pu-238, is used today to power pacemakers for people with deficient hearts. Also, isotopes Pu-242 and Pu-244, which occurs naturally, are used in studying chemicals and metals. The half-life of atoms of plutonium was very important to seaborg and his assistants back in 1940. In fact, all of his other radioactive discoveries were based on the finding of ...
- 656: Asimov On Chemistry by Isaac Asimov
- ... talks about and contemplates how all life can be placed in a egg which is so small. He ends by talking about the volume and number of atoms certain viruses contain along with who died studying them. That's Life Explanations of life are given here. Asimov talks about people theories and definitions of life over past years. People tried to say what was living and what was dead by definitions ...
- 657: Analytical Chemistry
- ... solids, liquids, gases, pure elements, compounds, or complex mixtures. In addition, chemical analysis can characterize materials but determining their molecular structures and measuring such physical properties as pH, color, and solubility. Wet analysis involves the studying of substances that have been submerged in a solution and microanalysis uses substances in very small amounts. Qualitative chemical analysis is used to detect and identify one or more constituents of a sample. This process ...
- 658: The Sun
- ... certain "line".Without the sun we could not survive. History of the Sun People have studied the stars since day one. Many cultures have studied and worshiped the sun. This was the earliest form of studying the moon. In 1611Galileo, using the telescope that he invented, discovered dark spots on the moon. Galileo blazed the way for study of the sun. His observations helped to lead the sun being viewed as ...
- 659: Our Solar System at a Glance
- ... of Mars. The last theory has some good support but is far from certain. MARS Of all the planets, Mars has long been considered the solar system's prime candidate for harboring extraterrestrial life. Astronomers studying the red planet through telescopes saw what appeared to be straight lines crisscrossing its surface. These observations -- later determined to be optical illusions -- led to the popular notion that intelligent beings had constructed a system ...
- 660: About All Sharks
- ... rarest of cases complete fossil have been discovered. Scientific data shows that following a period of great physiological changes. There was not to many changes in the sharks fossil in the millions of years, of studying the shark fossils. The Hybodonts who made their appearance some 320 million (years ago the age of the dinosaurs) where quite common through out both oceanic and fresh water. Due to reasons unknown to science ...
Search results 651 - 660 of 1022 matching essays
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