.... of the hybrids use a basic setup. Mostly when the vehicle starts and travels at city street speeds less than 30 miles per hour the electric motor does the greatest amount of the work. As the cars power sources begins to lose some of its energy the backup gasoline engine starts. This function is similar to how gasoline cars work, with the alternator using the engine's power to recharge the battery. After the power supply is replenished the gasoline engine shuts down. Also the gasoline engine is used to power the vehicle as it reaches the higher speeds where the added horsepower is needed. Usually the speed at which the gasoline engine starts is in the 30 mil .....

.... than women. Mononucleosis does not occur during any particular season as does the common cold, although studies show that the most cases are reported during the fall and spring. The actual way that mononucleosis is passed is unknown, although what is known is that the virus can travel in saliva which is the primary source, therefore it may be spread through coughing , mouth to mouth contact of mucous membranes during kissing. This is where the common nickname was derived "the kissing disease". In rare cases this disease may be transmitted through blood transfusions. The disease is usually transmitted to family members, friends and people that you m .....

.... angular momentum, obeying Pauli's exclusion principle. This principle that no two particles having half integral spin can exist in the same quantum state(1985 Quarks). Quarks always occur in combination with other quarks, they never occur alone. Physicists have attempted to knock a single quark free from a group using a particle accelerator, but have failed. Mesons contain a quark and an antiquark, up, down, and strange, while baryons contain three quarks distinguished by flavours. Each has a charge that is a fraction of that of an electron. Up and down quarks make up protons and neutrons, and can be observed in ordinary matter. Strange quarks can be .....

.... of Apparatus Used. 1 x 500ml Beaker. 1 x Thermometer(-10 to 50oC). 1 x Polystyrene Cup. 1 x Weighing Balance. 1 x Weighing Bottle. 10 grams of Sodium Hydrogencarbonate. 10 grams of Sodium Carbonate. A bottle of 2 molar HCL. Diagram. Method. Three grams of sodium hydrogen carbonate was weighted out accurately using a weighting bottle and a balance. Then thirty centimetres cubed of 2 molar HCL was measured using a measuring cylinder. The acid was then placed into the polystyrene cup and its temperature was taken and recorded using the thermometer. The pre-weighted sodium hydrogencarbonate was then added to the solution, and the final temperature was recorde .....

.... the major pollutants produced by these sources are carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. Nitrogen oxides can react with hydrocarbons in the prescence of sunlight to produce a form of oxygen called o-zone. O-zone(Oł) is the chief component of photochemical smog, which is a common form of . Fuel combustion for heating and cooling homes,offices,buildings, and factories contribute significantly to . Electric power plants that burn coal or oil in also releases pollutants into the atmosphere. The major pollutants from these source are nitrogen- oxides, sulfur-oxides, and carbon dioxide. The rapid growth of population .....

.... This stream of particles, a form of plasma, is carried away from the sun by the solar wind. As the plasma approaches Earth, it is trapped for a time in the outermost parts of the Earth's magnetic field, an area called the Van Allen belts. Eventually the plasma is drawn down toward the North and South magnetic poles. Along the way, it ionizes (creates an electric charge within) the oxygen and nitrogen gas it encounters in the atmosphere, causing it to glow. The flow of plasma from the sun is generally continuos, although it occasionally bursts out of holes in the sun's outermost atmosphere. Massive ejections of plasma have also been shown to acc .....

.... the solar system." (Hill, 1992 p. 477) People have recently become more concerned with preserving our earth for future generations. Even the government pitches in to help save our earth by enacting laws to help preserve our natural resources. There is local evidence that improved sewage treatment means improvement in water quality. Monitoring on a national level showed that large investments in point-source pollution control have yielded no statistically significant pattern of improvement in dissolved oxygen levels in water in the last 15 years. It may be that we are only keeping up with the amount of pollution we are producing. (Knopman, 1993) The e .....

.... and Keys........19 VIII. Conclusion............................................20 BIBLIOGRAPHY.........................................................21 INTRODUCTION Mechanics is the physical science concerned with the dynamic behavior of bodies that are acted on by mechanical disturbances. Since such behavior is involved in virtually all the situations that confront an engineer, mechanics lie at the core of much engineering analysis. In fact, no physical science plays a greater role in engineering than does mechanics, and it is the oldest of all physical sciences. The writings of Archimedes covering bouyancy and the lever were recorded before .....