Physical Science Essay Example | Topics and Well Written Essays - 750 words

Physical Science - Essay Example Finally, the photo thermal effect is where the photons absorbed transform to heat energy (phonons) through vibration of molecules. Energy can also transform when nuclear reactions occur. Through fission or fusion, subatomic particles are rearranged hence creating a transformation of energy. The final factor that facilitates transmission of energy from one form to another is the action of forces. These forces include gravitational force, frictional force and electromagnetic force fields (Rathore, 2011). A common transformation is that of kinetic energy to heat energy. The atoms of a substance are in constant, random motion. As the atoms slide against each other molecules come into contact and, therefore, interact via electromagnetic fields causing vibration. The random vibration of molecules and atoms in a substance result in the increase of pressure within the substance. These vibrations may also increase with an increase in external or internal temperature of the substance. An incre ase in the vibration of the substance’s molecules and the subsequent increase in pressure transform potential energy into kinetic energy thereby leading to an increase in the kinetic energy. High kinetic energy is an indication of high temperature, therefore, heat energy (Rathore, 2011). Energy is necessary for running peoples everyday lives. A common source of energy in the world today is fossil fuel. Fossil fuels are hydrocarbon compounds formed through the biochemical decomposition of organic compounds over millions of years. Examples of fossil fuels include oil, coal and natural gases such as butane. These fuels are attractive sources of energy because of various reasons. The first reason is that these sources of energy can be utilized differently to produce energy. One can burn them directly or derive other compounds such as petroleum, used to run vehicle engines, in the case of oil. Above the efficiency, other products such as plastic are derivatives of fuels such as oi l. A single location with fossil fuel can produce large amounts of energy beating the prospecting and mining costs by ten folds. Through pipelines, it is particularly convenient and cost effective to transport oil and natural gas from one station to the other. Finally, gas run power plants are extremely efficient, and they can be located anywhere there are abundant gas sources (Pimentel, 2008). Fossil fuels are non renewable and a potent source of pollution through carbon emissions. With the pressing need to curb global warming and its adverse effects, new environmental friendly energy sources need to replace fossil fuels. Wind energy is a clean, renewable source of energy. Tapping wind energy requires the construction of turbines. Wind posses kinetic energy that turns these turbines, through this process, kinetic energy turns into mechanical energy. This energy runs the generator connected to the turbines hence producing electric energy. Locating a wind power station is more taskin g than locating a fossil fuel station. However, the energy produced by wind is clean compared to fossil fuel energy. Also, the cost of constructing a wind farm can be offset through the subsequent efficient production of energy (Pimentel, 2008). Another source of energy scientists seem to approve in place of fossil fuel energy is solar energy. This form of energy requires the utilization of the photo thermal effect. Solar cells absorb the photons within the sun rays. The photons transform the solar cell electrons into conduction

Why do women only make up 6.5% of consultant surgeons in the UK Essay

Why do women only make up 6.5% of consultant surgeons in the UK - Essay Example The idea of such a work is to find out the reasons for this, so some solutions may be suggested in order to change the present scenario. Feminine has always been regarded to have less status and power and has always been subordinate.. Perhaps due to this reason, although these sex differences in earnings, occupations, and work in the United Kingdom have decreased over the past few decades, sharp differences still persist. Like in any other profession, the women now constitute a large force in terms of number and quality in the medical profession. However, there is a certain pattern of their choices of discipline, especially when the numbers of female professionals in different specialities are considered. The greatest convergence between women and men has occurred in labor force participation (Buyske, 2005). Yet despite this increased participation-and this may help to explain the slower progress with respect to wages and occupational segregation-women, on average, devote far more time than men to housework. One medical profession is surgery, or more specifically general surgery, where particularly male predominance has been observed. As of now, as statistic indicate only 6.5% of the consultant surgeons in the United Kingdom are women. ... In this work, the answers to these questions will be attempted to be found out through evidence from literature. Broadly speaking, this research covers two areas of inquiry. The first attempts to understand the sources of sex differences in labor markets in the context of surgery as a profession without resorting to explanations based on labor market discrimination. The dominant focus would be on how family economic decision making regarding the allocation of time and human capital investment may generate the observed differences between women and men in occupations, participation, and nonmarket work. The second area of concern could be existing discrimination and male predominance that might have led to a situation where female doctors are comparatively less interested in pursuing a career in, otherwise, exciting surgery. History of Women in Medicine Historically, women doctors are simultaneously a part of medicine and have been placed outside it, and their presence in large numbers is actually a destabilizing one. Surgery as a medical profession had always been seen as a symbol of masculinity, and that rests on an opposition between women and medicine. The century long history of medicine suggests that for long western culture was patriarchal in that it did marginalise women in the profession, reluctant to accept them on the same platform, and women as doctors have faced major hostility from the so called social dominance of masculinity. In fact, for quite some time, women were banned from joining surgery. Male Oriented Power and Privilege It had been previously conventional that medical power and privilege were male oriented; the operations and status