... area to volume ratio of 1.25:1, will loose heat at the same rate as a similar flask of volume 625 and a surface area of 500 which also has a surface area to volume ratio of 1.25:1. However, generally when you increase the size of an object the surface area to volume ratio decreases so in this example it is very likely that the two flasks in question are different shapes. In this experiment the two flasks which will be used will different surface area to volume ratios as follows: 100 cm3 flask: Volume = 100, Surface Area = 115. Surface Area to Volume Ratio = 115 ---- : 1 = 1.15 : 1 100 500 cm3 flask: Volume = 500, Surface area = 330. Surface Area ...
... and petroleum mining. Another one of its uses is as a getter in vacuum tubes. ’s sulfate is used in paint and in glassmaking. Barite is extensively used as a weighing agent in oilwell drilling fluids. The carbonate has been used as a rat poison, while nitrate and chlorate give colors in pyrotechny. The impure sulfide of radiantly glows after exposure to the light. metal has few practical applications, although it is sometimes used in coating electrical conductors in electronic apparatus and in automobile ignition systems. sulfate (BaSO4) is used as a filler for rubber products, in paint, and in linoleum. nitrate is used in fireworks. A form of sulfat ...
... (by meters) that is traveled from the crest of one wave to the crest of the next. Radio frequencies are measured in units called kilohertz, megahertz, and gigahertz. (1 kilohertz = 1000 hertz : 1 megahertz = 106 hertz, 1 gigahertz = 109 hertz). All radio waves fall within a frequency range of 3 kilohertz, or 3000 cycles per second to 30 gigahertz. Within the range of frequencies, radio waves are further divided into two groups or bands such as very low frequency ( VLF 10-30 kHz ), low frequency (LF 30-300 KHz), medium frequency ( MF 300-3000 KHz), high frequency ( HF 3-30 MHZ) and very high frequency ( VHF 30-300MHZ). Amplitude modulation is the oldest ...
... prevents little boys and girls to attend school. I am the vivid part of life. I shield protection for those below me from the sun's intense heat. I am fed and drunk by those who go through hunger. As acid contained in the human body, I digest food and clean out wastes. I am a desperate hope for a cure, yet poison, slowly spreading in the air and along the land. I am the colorful fireworks "sprocketed" across the dark sky when the touch of two soft lips are gently pressed together. I am the warm tears trickling slowly down a child's face when the thought of going to school all alone crosses his mind. I am te pure exhilaration every time two people fall in love. I am ...
... named endangered when of its kind occurs in a low number. About 1000 species in the world are named endangered, or are in threat to be extinct. I never knew that some kinds of birds were in danger. We can help these animals and plants by making laws that you are not allowed to hunt or kill any animal that is in danger of extinction. Government Involvement Only since the 19th century has there been worldwide concern about the case of species in their natural environments. Finally in 1916 they made a law called Migratory Bird Treaty. They had this law in United States, Great Britain, Canada, and later in Mexico. This law was made so that people can not kill anima ...
... justified for the first time convincingly by physical experiment. They sang success at the annual Cavendish dinner. Armed with the electron, and knowing from other experiment that what was left when electrons were stripped away from an atom was much more massive remainder that was positively charged, Thomson went on in the next decade to develop a model of the atom that came to be called the "plum pudding" model. The Thomson atom, "a number of negatively electrified corpuscles enclosed in a sphere of uniform positive electrification" like raisins in a pudding, was a hybrid: particulate electrons and diffuse remainder. It served the useful purpose of dem ...
... and the other, called ion tail, is made gases. As a comet approaches the sun, the frozen gas becomes unfrozen which causes the dust particles to become free. Light pressure from the sun and some other forces cause these materials to move away from the head of the comet and in the opposite direction from the sun. According to Charles A. Schweighauser in his book, entitled Astronomy from A to Z: A Dictionary of Celestial Objects and Ideas, he states that we see comet heads and tails because they not only reflect sunlight, but they also fluoresce—give off their own light—when are near the sun. The tails from the comet may be up to 150 million kilometers long ...
... two possibilities as to the nature of a physical (which we can equate to 'scientific') theory. The first being that it is an explanation of the reality lying behind a group of experimental laws (those that are empirically determined). The second is that a physical theory is simply an abstract system to classify and summarize a group of laws. Taking the first possibility (a belief still held by many today): this seeks to look beneath the sensible appearances and find the reality beneath, which is causing the sensations we experience. However, this presents us with a problem. We only have access to perceptions so how can we hope to find a physical theory that provid ...
... filled lungs. A person can be exposed to when they are in cold weather and improperly dressed or submerged in cool water for a long period of time. There are even reported cases of elderly people dying of in their homes do to the non-efficient heating system. Over 50% of deaths in Manitoba, Alberta, and British Columbia are related to alcohol and drug intoxication.(Seluge,1) can also occur when a person has illnesses or health problems such as heart circulatory, or thyroid diseases; diabetes, arthritis, and other conditions that prohibit mobility. Having these conditions can interfere with the body's ability to fight the cold. When a person is fatigue or i ...
... sulfur dioxide and nitrogen oxide transforms into sulfuric acid and nitric acid. Air current can send them thousands of kilometers from the source. When these acids fall to the earth, they will have large impact on the growth and the preservation of certain wildlife. These substance's can neutralize acids entering the body of water, thereby protecting it. However, large areas of Ontario that are near the Pre-Cambrian Shield, with quartzite or granite based geology and little topsoil; there is not enough buffering capacity to neutralize even small amounts of acid falling on the soil and the lakes. Therefore over time, the basic environment shifts from an alkaline to ...
