Pressure :: essays research papers

PressurePressure, is the ratio of a strong point playacting on a surface, to the atomic number 18a of the surface it is thus distinct from the pith force acting on a surface. Units of drag are force units divided by area units. Examples of these are pounds per square inch, dynes per square centimeter, or newtons (N) per square meter (Pressure n.pag). Pressure has many influences and effects on objects. When the pressure rises, it affects the melt vanquish point and the boiling point of a substance. This causes the raising of the melting and boiling points of most substances (Pressure The... n.pag). Pressure can be seen and demonstrated in many ways including station pressure, Bernoullis dominion, Pascals Principle, and Archimedes Principle. melodic phrase pressure is the force exerted on you by the weight of tiny particles of rail line, called air molecules (Sample n.pag). The airs pressure is caused by the weight of air that presses down on the earth, the ocean, and the a ir (Understanding...n.pag). Even though they cant be seen, they still have weight and take up space. line of merchandise molecules are very spaced out and can be compressed to operate in a smaller volume. When the air is tightly compressed, the air is infra high pressure. We are continuously spiriting air pressure further we are used to the air pressure around us at sea level so we dont consciously feel it. But when one travels higher the number of air molecules decreases and thus the air pressure also decreases. When this happens, certain symptoms can be noticed, such as a shortness of breath and the popping of your ears. This pressure is measured by an instrument called a barometer (Sample n.pag). Air pressure is reported in inches of hydrargyrum in the U.S, but elsewhere they measure it in millibars, also called hectopascals (hPa). Air pressure, among other things, is used to forecast the weather. If there is a high-pressure remains coming through, then cold temperatures an d blue skies will result. If there is a low-pressure system, then warm, stormy weather is expected.Bernoullis principle is a perfect example of how the use of pressure can be beneficial. This principle has to do with flight and is what keeps planes in the air. It has to do with the shape of the wing on an aircraft. The bottom part of the wing is flat and the top of it is curved.