... most popular instruments which used were quadrant, armilla, and triquetrum. All furnish some measure of the position of the heavenly body. It took an endless amount of mathematical calculations to come up with the Copernicus' theory. He had to find out how fast the Earth spins around the Sun, and how far the Sun is. He also had to calculate the length of the orbit of the Earth. People use math in every walk of life. In our days everything is related to math, and Copernicus used his knowledge of mathematics to provide the human kind with an important discovery. Only a small amount of people are interested i ...

... you consider the millions of tons of toxic waste that we produce every year, that 15% is enormous. The Environmental Protection Agency (EPA) estimates that we produce one ton of toxic wastes for every single person living in Canada every year. That means that the 15% represents about 4.2 million tons of toxic waste. Toxic wastes, which are dumped in improper sites, can seep into underground water supplies and contaminate huge areas. If the land that is intoxicated supports plant life, most of the plants and trees will die off. If humans occupy the area, it could cause serious illness or death. For example, an ar ...

... society. As we look deeper into the constant changing of what a person needs to be an active member of a community we notice the continuos alteration of what exactly defines a comfort a necessity and a luxury. Comfort by definition is a condition of pleasurable ease or well being. By that definition there are endless numbers of object that could serve as a comfort. Take public transportation for example. The thought of having the train that takes us into the city is a commonly know option. Not always have people been able to choose public transportation as a method of getting to and from. Dating as far back a ...

... are based on theory only. Theory can be described as a general principle or explanation of presumed fact and offered opinion, which may or may not possibly of positively true. In the United States, laws have been passed several different ways constituting whether Darwin's theory of "survival of the fittest" can be taught in schools, versus religious belief of Divine creation. From 1920 to 1986 the argument continues in the courtroom, and many, many books have been written debating the issue. Let us look at the three theories in depth. The evolutionist theory made known by Charles Darwin, states that human ...

... enough energy for activities such as washing and bathing. The solar panels generate "low grade" heat, that is, they generate low temperatures for the amount of heat needed in a day. In order to generate "high grade" heat, intense enough to convert water into high-pressure steam which can then be used to turn electric generators there must be another method. The concentrated beams of sunlight are collected in a device called a solar furnace, which acts on the same principles as a large magnifying glass. The solar furnace takes the sunlight from a large area and by the use of lenses and mirrors can focus the light ...

... acid, don’t release many ions and conduct poorly. Non electrolytes, like sugar, release no ions and form non conducting solutions. A couple electrolytes conduct electricity as solids. These solid electrolytes have ions that can move and carry charges without solvents. There are two ways to be able to have ions that are able to conduct electricity, the dissociation of Ionic Compounds, and the Ionization of Polar Covalent Molecular Substances. The Dissociation of Ionic Compounds is where particles are ionically (electrically) bonded together. They already made out of cations and anions, but in their solid st ...

... front legs while at rest or waiting for prey. It is also called the "preying" mantis because of its predatory nature. CLASSES Many questions have risen regarding the praying mantis. Such questions include how many different species there are in the animal kingdom. Estimates range from 1500 to 2200 different mantid species WORLDWIDE. The most common figure given, though, is about 1800. The ways the Mantid's are classified in the Animal Kingdom. There is agreement that the collection of mantid species make up the Mantidae family of insects. The Mantidae family, in turn, is part of the order/suborder Mantodea t ...

... The term red tide is misleading in the name. "Red tides are only occasionally red, also appearing as orange, brown, and even green. And they never occur literally as tides, which are the rises and falls of the sea." (New York Times: Aug. 27,1997) Some cases of red tides do not show any change in the color of the water at all. This makes a red tide very hard to predict or find. Red tides often occur when fresh water runoff creates a stratified surface layer above colder nutrient-rich waters. "heavy rains might have helped the red tides develop by pouring fresh water and nutrients into surrounding sea waters, ...

... and will ultimately be the catalyst for the destruction of the human race. Dr. Frankenstein was a scientific genius and ambitious in his studies. When he tried to use his genius to prolong life, he found he had the power to create life. The doctor's scientific success in creating the monster was ultimately a failure for morality. Frankenstein, upon completion of his monster, realized the immorality of his work and rejected it and disassociated himself from it and science. The result of Frankenstein's immorality was death for just about everyone he loved and utter despair for himself. The monster was not ...

... motion, the mass could be measured fairly accurately by measuring the oscillation period and comparing it to a known mass period. The relationship m1=m2T12/T22 was discovered. Objective: After completing the experiment, we will be able to find the mass of objects using an inertial balance and compare them to accepted measures. Materials: C-clamps, inertial scale, a watch with a second hand, and a triple beam balance. Procedure: 1) The class will measure the period of oscillation of their balance pans when they are empty. The accepted period will be the average of the class. To find the period, you will m ...