The principle ,method and applications of fluid pressure measuring Coursework

The principle ,method and applications of fluid pressure measuring - Coursework Example For example, the pressure at the bottom of a dam is equivalent to the ratio of the weight and the area of the column covered by the water. Fluid pressure can be caused by acceleration, gravity or hydraulic systems those results into force thus affecting static fluid pressure. Fluid pressure applies in all directions hence internal pressure of a fluid is equivalent to the external. In this regard, if either pressure is different (internal or external) the object holding the fluid would break. This principle explains the reasons why dams are always constructed thicker at the bottom. The fluid pressure increases as you go deep through the fluid column. The fluid pressure at any point in this case depends on how deep that point is from the surface of the water. If the surface of the water is flat or if the water surface is not tilted to any side, then pressure at point having the same level of depth will always be the same. However, other factors such as can affect fluid pressure. Having described what fluid pressure entails, it is imperative to discuss how this fluid pressure is measured. The theory and principles of fluid pressure measuring Fluid pressure is measured by application of the first principle mentioned in the introduction above that fluid pressure is the force exerted by fluid per unit area. It is also important to note that the intensity of transmission of fluid pressure is equal to all directions. This is expressed in Pascal’s law of pressure Pascal’s law of pressure This law was established by a French Blaise Pascal and states that pressure is exerted and transmitted equally in a confined and non compressible fluid thus the initial variations is always the same (Balachandran 2006, p. 237). In this regard, pressure change at any point of the fluid is transmitted wholly to every point of the fluid. Pascal’s principle is used to derive the equation for measuring fluid pressure and changes in fluid pressure. The following diagram d escribes how Pascal’s principle is demonstrated by the fact that the fluid pressure at any point is equal in all the directions. Fluid static law The fluid static law states that increasing depth of fluid results into the increase in pressure (Balachandran 2006, p. 238). This law is also referred to as hydrostatic law which implies that fluid pressure is directly proportional to the depth of the fluid The pressure depth equation For static fluids, the pressure p at depth h and weight w of the fluid can be expressed as Pressure (p) = height of the fluid (h) x density of the fluid (w) The above equation describes the formulae for fluids that are standing still thus this formula describe the force exerted per unit area. The above equation can be used to derive the equation for the total force that is exerted by the fluid on a horizontal base. Since the above equation simply tells us the force exerted per unit area, to get the total force, we multiply force exerted per unit area by the total area of the horizontal base. F = force per unit area (wh) x area (A) = whA The above equation is used to calculate pressure especially when a horizontal plate is submerged in water. The above equation gives the total force exerted on the upper face as a result of fluid pressure. However, when such plate is submerged vertically, then, pressure will vary depending on the height of the fluid column. Pressure = Force p = F/A Area over which the force is applied In this

At-Risk Students Assignment Example | Topics and Well Written Essays - 1000 words

At-Risk Students - Assignment Example Some factors are predetermined to be causes of risks for dropping out of high school among the youth. Most of these are but not limited to: having divorced parents or undergoing divorce; lack educational support at home; financial instability; lack ties to community, school, and peers; high rates of mobility; little or no extra-curricular activities; has a long history of being unsuccessful academically; being emotionally unstable; sufferers of physical, emotional or sexual abuse; have psychological and/or addiction problems; have no health care plans; juvenile law-offenders or gang-members; or have not finished the grieving process for the loss of important loved ones (McGee, 2001). The presence of one or a combination of any of these risk factors increases the stress levels of students, which makes them lose focus on studying and instead lets them dwell more on such problems. In addition, the lack of a proper support groups or guidance counselors would leave these youths unable to cope with the strains both in the home and in the self, which could prevent them from properly learning, and would ultimately lead them to self-pitying, hopelessness, and eventually dropping out from school or pursuing their chosen careers. Most students recognize the need to graduate in order to improve their lives, so it would be absurd to think that they chose to drop out for no sound reason (Pillow, 1997). They would even show signs to teachers or advisers that they want to finish school but they might not know how to do this effectively. These indicators would show up in behaviors such as showing up in class despite having low grades, submitting half-done homework and taking or retaking exams despite previous scores. However, it  does not get enough support and encouragement from their teachers in being pushed forward to graduate, or if they feel that they do not receive any help, these students would feel discouraged and even think that it is not worth doing anymore since help is not available anyway.