Rate of Radioactive Decay Worked Example Problem

Rate of Radioactive Decay Worked Example Problem You can use the equation of the rate of radioactive decay to find how much of an isotope is left after a specified length of time. Here is an example of how to set up and work the problem. Problem 22688Ra, a common isotope of radium, has a half-life of 1620 years. Knowing this, calculate the first order rate constant for the decay of radium-226 and the fraction of a sample of this isotope remaining after 100 years. Solution The rate of radioactive decay is expressed by the relationship: k 0.693/t1/2 where k is the rate and t1/2 is the half-life. Plugging in the half-life given in the problem: k 0.693/1620 years 4.28 x 10-4/year Radioactive decay is a first order rate reaction, so the expression for the rate is: log10 X0/X kt/2.30 where X0 is the quantity of radioactive substance at zero time (when the counting process starts) and X is the quantity remaining after time t. k is the first order rate constant, a characteristic of the isotope that is decaying. Plugging in the values: log10 X0/X (4.28 x 10-4/year)/2.30 x 100 years 0.0186 Taking antilogs: X0/X 1/1.044 0.958 95.8% of the isotope remains

Differences Between Après vs. Derrière and Avant vs. Devant

Differences Between Aprà ¨s vs. Derrià ¨re and Avant vs. Devant Aprà ¨s and Avant convey a notion of time or space. Aprà ¨s refers to doing something after while Avant refers to doing something before. Je le retrouve aprà ¨s/avant le dà ©jeunerIll meet up with him after/before lunch Aprà ¨s/avant le bois, il y a un cheminAfter/before the wood, there is a path Derriere and Devant convey a notion of precise space. Derrier refers to being behind something, or someone and Devant refers to being in front of something or someone. La petite fille est cachà ©e derrià ¨re larbreThe young girl is hidden behind the tree Pour la photo, comme tu es plus petite, va devant Camille.For the picture, since you are smaller, go in front of Camille.   Derrià ¨re le bois, il y a un cheminBehind the wood, there is a path Aprà ¨s and Derrià ¨re Are Not Interchangeable So, what is the difference between the two sentences aprà ¨s le bois, il y a un chemin and derrià ¨re le bois, il y a un chemin? They both give a piece of space-related information, but one is more precise, just like in English. Same exact logic applies to avant versus devant. Aprà ¨s Que Indicative / Avant Que Subjunctive A common mistake is Aprà ¨s que plus a subjunctive. Its a very common mistake, even among French people, because honestly, the indicative sounds terrible there. Avant que is followed by the subjunctive  because we dont yet know if the action is going to become a reality. With Aprà ¨s que, the action has taken place already: there is no doubt left, hence no need for the subjunctive. Aprà ¨s que subjunctive sounds so bad to a French ear that we will do our best to use a noun instead of a verb after. You can use the same trick with avant que et avoid using a subjunctive. Je dois commencer aprà ¨s quil part. (or aprà ¨s son dà ©part)I must start after he leaves (or after his departure). Je dois commencer avant quil parte (or avant son dà ©part).I must start before he leaves (or before his departure) By the way, even if we use le derrià ¨re in French (although this is extremely polite, just like saying the behind in English), French people use the preposition derrià ¨re without thinking about it at all. Just like in English you use behind without thinking about that part of the anatomy.

Answer week 10 m9 Essay Example | Topics and Well Written Essays - 250 words

Answer week 10 m9 - Essay Example Our workplace environment operates in a very strict ethical environment. Any employee who attempts to violate the set norms attracts immediate dismissal or sanction. I admit that the CAL project has equipped me with variety of skills on how to resolve the workplace-based problem. Through the project, I have understood the corporate social responsibility (CSR) as an inevitable component in the contemporary organizations. It encompasses creation of a favorable workplace environment to both the outsiders and the insiders. Having worked for nine months in a research firm, I have notice that one of the main causes of work-based problem is the lack of honesty, honesty, accountability, integrity, and legitimacy (Badaracco, 1992). From the CAL project, I have learnt that CSR provides framework through which such organizational problems can be identified, managed and controlled. One of the challenges facing most of the human resource managers concerns the incorporation of CSR requirements. Most managers find it hard to integrate some of the CSR because of the aspect of cultural differences. Personally, I have been trying my best to incorporate most of the general reflection on learning outcomes in the firm I work in. However, I normally face the problem related to cultural diversity. Badaracco, J.L., 1992, Business ethics: Four spheres of executive responsibility, California Management Review, 34(3), pp. 64-79. Available from: http://ehis.ebscohost.com.ezproxy.liv.ac.uk/ehost/detail?sid=c2ac9049-a9b7-49b0-9698- 74f9a857ae32%40sessionmgr104ssss&vid=1&hid=103&bdata=JnNpdGU9ZWhvc3Qtb

Tim's Coffee Shop Research Paper Example | Topics and Well Written Essays - 2000 words

Tim's Coffee Shop - Research Paper Example This write up is an analytical paper focusing on the Tim’s Coffee Shoppe, a small sole proprietor business with 10 employees who are currently working and serving the customers visiting their coffee shop. Since the business is situated at a prime location and as a result the customer footfall quite high. Moreover, the service hours offered by the shop acts as a competitive advantage for the firm.   However, there are certain areas where the company needs to improve. For instance, the vision statement can be modified and the company can clearly define its long term and short term goals. The vision statement of the company can be to provide the perfect cup of coffee in the perfect ambiance. This would mean that the shop will provide good quality coffee. The store will provide a good strategic location and the ambiance of the store will provide the customers with the ability to socialize or relax and pampered by the excellent customer service. To meet this vision the company ne eds to improve its present state of performance, improvise the quality of coffee and customer service, maintain the store ambiance and provide additional value to the customers. Scholars such as Drucker, emphasizes that management denotes both â€Å"a function† and â€Å"the people† who discharge it. The importance of management in an origination cannot be denied; thus, organizations have dedicated departments for managing the workforce. Tim’s Coffee Shoppe is a small sole proprietor business with 10 employees who are currently working and serving the customers visiting their coffee shop. Since the business is situated at a prime location and as a result the customer footfall quite high. Moreover, the service hours offered by the shop acts as a competitive advantage for the firm. However, there are certain areas where the company needs to improve. For instance, the vision statement can be modified and the company can clearly define its long term and short term g oals. Action Items The vision statement of the company can be to provide the perfect cup of coffee in the perfect ambience. This would mean that the shop will provide good quality coffee. The store will provide a good strategic location and the ambience of the store will provide the customers with the ability to socialize or relax and pampered by the excellent customer service. To meet this vision the company needs to improve its present state of performance, improvise the quality of coffee and customer service, maintain the store ambience and provide additional value to the customers. Short Term Goals 1. The first goal of the company in the next year should be to increase the market share by attracting new customers which will in turn help to generate higher revenue. 2. The companies in the industry constantly strive for innovating new products based on customer demands in order to attract consumers and differentiate them from the competitors. With increasing health consciousness a mong customers, the companies are introducing healthy alternatives. Differentiation gives the companies a competitive advantage. 3. According to the survey records of the customers, majority of them mentioned that the customer service was poor. So it would be important for the company to improve customer service in order to attract new customers and retain existing customers. Long Term Goals 1. The quality of coffee is crucial for any coffee shop to become successful. But through the customer surveys it was found that the quality of coffee was average. So the company should focus on improving the quality of coffee and offer more competitive products. 2. The employees’ opinions reflected that they were satisfied with their jobs but were suffering from low morale. Some of them were planning to leave the company and join the competitors. So in the next 3 years, the company needs to develop a strong retention plan and provide customers with career growth opportunities. Federal an d State compliance Issues Some of the Federal and State compliance Issues that the company might face are as follows:- Multiplicity Issues. Code issues (Community Development Law Center and Fair Housing Council of Oregon, 2009). Now in order

Black People and Roberta Essay Example for Free

Black People and Roberta Essay In Toni Morrison’s â€Å"Recitatif,† the story is about two girls, Twyla and Roberta. They grow up in an orphanage because their mothers could not care for them. Morrison makes it clear the girls come from different ethnic backgrounds but never states which one is black or white. At one point in the story Twyla comments, â€Å"We looked like salt and pepper. † I grew frustrated with the story and had to read it several times. I could never determine who was black and white and the lesson I learned should have been it doesn’t really matter. The story begins with Twyla’s mother dropping her off at the orphanage. She meets Roberta and they become best friends. The bond they share occurs because they were not considered real orphans. They were abandoned kids unlike the other children whose parents had died. One of the last times the girls see each other was the day of a visitation. On that night, Twyla’s mother was wearing â€Å"those tight green slacks that made her butt stick out. † Many people have labeled blacks as having larger butts. She could have been black, she could have been a heavy white woman with a large butt, or a Hispanic woman like me. But I automatically stereotyped and went with Twyla has to be black. During the visitation Roberta’s mother â€Å"had brought chicken legs. † Twyla notices Roberta does not eat the chicken legs. I always thought black people liked chicken more than white people which means Roberta was white since she did not eat the chicken. Or maybe she just wasn’t hungry. Shortly after that visitation Roberta’s mother came to take her home, leaving the girls devastated. They see each other several times throughout the years. At their first meeting, Roberta was rude and distant because she was high. Roberta tells Twyla she is on the way to see Jimi Hendrix. Hendrix was an infamous black guitarist. I thought at this point Roberta has to be black. However Hendrix’s band was interracial with a diverse audience. Roberta could have been white due to the diverse audience. I am a huge Hendrix fan and I am not black so why would I think Roberta is. Twelve years later they meet again at a grocery store. Roberta married a rich man and was extremely friendly to Twyla. Twyla cannot hold back her emotions and asks Roberta about the last time they saw each other. Roberta shrugs it off, â€Å"Oh, Twyla, you know how it was in those days: black—white. You know how everything was. † I can relate to this. In 1980, the Cuban Mariel Boat Lifts came over bring thousands of Cubans. I am Cuban but I was born here. Kids I had known since kindergarten treated me as if I just come over on the boats. It had a lasting effect on me and matured me beyond my years. The third time they meet is at the school where their children attend. Roberta and other mothers were picketing because they did not want their kids to be segregated. This led to a fight severing any last chance of a friendship for them as it would not be resolved until Twyla and Roberta meet for a final time. As the story ends I do not get a sense of closure. The question of which girl is white or black remains unanswered. It opened my eyes and made me question how prejudice I really am. I try to not stereotype as a result of what I went through as a child but I found myself doing just that. I can understand why Morrison wrote the way she. I am not sure what her goal was overall but to me it seemed as if she were teaching me about prejudices. â€Å"Recitatif† challenged me to not judge either girl by their race but accept them for who they are. In the end, what difference did it really make about the girls’ races? The story is about how their friendship develops and then deteriorates. Nothing more; nothing less.

Edna,Hester, and Huck :: essays research papers

Edna, Hester, and Huck offer many ways that they look at society. These ways differ in how they approach their perspectives, reach their perspective, and what they conclude from their perspective. Moreover, there are a great number of similarities between the outlooks of the three characters upon the world in that they all learn or conclude their outlook from the circumstances that they are faced with, they all change their ways and somewhat rebel against their societies culture as a result of the new outlook, and furthermore they don’t try and change their society and make an impact.   Ã‚  Ã‚  Ã‚  Ã‚  Hester Prynne is a character that approached her new outlook as something she had to do for herself. She faced the Puritan society because she was placed in the public eye and she had to. Which resulted in her reaching perspective that the love and passion she had for Dimmesdale is not a crime and this can be seen through her choosing not to leave Boston and her also not taking the scarlet A off of her dress. Edna’s perspective was one in which she longed to change but didn’t know how, and Robert and Arobin helped her to figure out. Edna is a character that changes her outlook based on her thinking what everybody else’s outlook was. She wasn’t really sure herself what she wanted, she was very emotional and fickle. Edna’s perspective of the world that she was not really needed lead to the conclusion that she did not need to exist. Huck is young, naà ¯ve, and heavily influenced by if not everything, most things around him. He take s a look at how others see things, and how others act in certain situations to gain his newly independent outlook, expressed when he tears up the letter. He also allows his emotions for Jim gather up when he is forming his perspective of the world. The different time periods also have an affect on why and how these perspectives are different in that the times changed along with societies culture.   Ã‚  Ã‚  Ã‚  Ã‚  All the characters face their situations in boldness and believe that there is need for a change. They are alienated because each of the outlooks rebel against societal views and would be horrible if the society knew what they thought. Hester never told who Pearl’s father was because she felt it was his sin and he had to confess.

Motivation Theory: Explaining Tourist Behavior

Motivation theory â€Å"Crompton (1979) notes it is possible to describe the who, when, where, and how of tourism, together with the social and economic characteristics of tourist, but not to answer the question â€Å"why,† the most interesting question of all tourist behaviour. † (Fodness 1994, p. 556) While motivation is only one of many variables in explaining tourist behaviour, it is nonetheless   a very critical one, as it constitutes the driving force behind all behaviour (Fodness 1994).Motivation sets the stage for forming people's goals (Mansfeld 2000) and is reflected in both travel choice and behaviour; as such it influences people's expectations, which in turn determine the perception of experiences. Motivation is therefore a factor in satisfaction formation (Gnoth 1997). Basic motivation theory suggests a dynamic process of internal psychological factors (needs, wants and goals), causing an uncomfortable level of tension within individuals’ minds an d bodies, resulting in actions aimed at releasing that tension and satisfying these needs (Fodness 1994).Motives, implying such an action, require the awareness of needs, as well as objectives, promising to satisfy these now conscious needs in order to create wants and move people to buy (Goosens 2000). Objectives or goals are presented in the form of products and services, it is therefore the role of marketing to create awareness of needs and suggest appropriate objectives, promising the satisfaction of these (Mill and Morrison 1985). Several authors suggest (Dumazedier 1967, Krippendorf 1987, Parker 1983) that in the Western World free time and holidays are connected to the concept of self-actualisation or self-realisation.The latter defined by Grunow-Lutter (1983. p. 76) as â€Å"a person's dynamic relationship between the real and the ideal self, constituting a process of decreasing the distance between these two cognitive systems, themselves subject to continuous change. † It is the individual's aim to achieve a state of stability, or homeostasis (Goosens 2000), which is disrupted when the person becomes aware of the gap between real and ideal self, or as Goosens calls it a need deficiency. The resulting need to self-actualise represents the motive, which under the constraints of the situation sets the stage for the process of motivation (Gnoth 1997).But to what extent does tourism satisfy the intrinsic need for self-actualisation? Tinsley and Eldredge (1995) summarise 15 years of research into psychological needs, satisfied by leisure activities, and proposed leisure activities clusters such as novelty, sensual enjoyment, cognitive stimulation, self-expression, creativity, vicarious competition, relaxation, agency, belongingness and service. It is questioned however; whether these superficial needs are intrinsically motivated (Goosens 2000, p. 303), suggesting that these motivations are merely culturally learned stereotypes or explanations for lei sure behaviour.As Fodness (1994) states, a widely accepted integrated theory for needs and goals behind motivation is lacking. The question is of course why this is the case. Research into motivation can be distinguished into two categories, the behaviourist and the cognivist approach (Gnoth 1997). The discussion has therefore traditionally revolved around either push or pull factors influencing tourist behaviour (Crompton 1979). Push factors represent lasting dispositions, as they are internally generated drives. The individual, energised by such drives, will then search objects for the promise of drive reduction and develop a motive (Gnoth 1997).The behaviourist view thus emphasises the emotional parameter of decision-making, while the cognivist approach focuses on situational parameters in which motives are expressed, consequently encompassing a certain knowledge which the tourist holds about goal attributes as well as a rational weighing up of situational constraints (Gnoth 1997 ). This cognitive process results in motivations, which are more object specific than motives, as these only imply a class of objects and may result in a range of different behaviours, depending on the situation.This unidimensional approach has been criticised however (Pearce 1993, Parinello 1993), as push and pull factors influence the consumer simultaneously (Hirschman and Holbrook 1986), integrated by the concept of involvement, an unobservable state of motivation, arousal, or interest (Goosens 2000), which is evoked by stimulus or situations. This is the case, since pull factors such as marketing stimuli as well as the destination's and service's attributes respond to and reinforce push factors.Consequently research increasingly seeks to integrate emotions and cognition in the individual's decision-making process (Hartmann 1982, Pearce and Caltabiano 1983, Braun 1989, Gnoth 1997), indicating a more holistic approach. As a result it became evident that people's intrinsic needs ar e influenced by external factors. Rojek (1990) asserts that in post-modern society the superstructure of advertising, television, fashion, lifestyle magazines and designer values increasingly take the role of forming knowledge and beliefs.People's needs are neutral (Heckhausen 1989), as motives however, they require an object towards which the need is directed, and when linked to actual situations, cultural and social impacts are also applied (Gnoth 1997). Situations raise motives to the level of values, as such they are evaluations based on learned behaviour and perception (Lewin 1942, Vroom 1964). If a drive is reduced satisfactorily the individual is likely to remember the behaviour and employ the same behaviour again, thus acquiring habits (Hull 1943).Tourism experiences may therefore become learned behaviour and acquire the role of habit enforcers. Cognivists argue that knowledge and beliefs in future rewards, anticipatory in nature (Vroom 1964), are equally a product of former ly encountered situations (Murray 1938), and external formation. It may be concluded that motives merely represent learned behaviour, which are influenced by offered objects or tourism activities, while motivations represent knowledge and beliefs formed by society and culture or tourism marketers.The psychogenic need for self-actualisation, abstract in nature, is therefore operationalised in a learned and practical manner and expressed in values, which are learned strategies to either adapt one's environment to one's needs or adapt one's self to a given environment (Kahle 1983). Such values equally include effects of enculturation and socialisation (Fodness 1994). Furthermore the perceived gap between real and ideal self, may indicate both externally and internally controlled evaluations (Gnoth 1997).McCabe therefore asks what researchers can expect to know about individuals' drives, by asking them about their motivations and needs as these may not be available to individuals as par t of their consciousness (2000a, p. 215). Iso-Ahola (1982) states that â€Å"people do not walk around with numerous leisure needs in their minds and do not rationalise specific causes of participation if their involvement is intrinsically motivated† (cited in Goosens 2000, p. 303). Hence it may be assumed that needs are suggested by mmediate social peers, and the wider context of particular social realities as well as the influence of the media (McCabe 2000a). Yet as Weissinger and Bandalos (1995) stress, intrinsic leisure motivation, which is a global disposition and describes a tendency to seek intrinsic rewards, is characterised by self-determination, an awareness of internal needs and a strong desire to make free choices based on these needs. While self-actualisation may be accepted as a need intrinsic to all individuals, society exercises a great deal of influence on the formation of the ideal self and thus perceived needs.However the notion of authentic or true self, d etermined by way of experience, offers a solution to the predicament. According to Waterman (1984), individualism symbolises four psychological qualities, the first one is a sense of individual identity, based on the knowledge of who one is and what one's goals and values are, as such it is related to the philosophical concept of true self, which indicates what an individual reckons personally expressive and what it is to be actualised (p. 30).The second is Maslow's self-actualisation, which is the driving to be one's true self. The third quality is Rotter's (1966) internal locus of control, which reflects a willingness to accept personal responsibility for one’s life, and finally prinicipled (postconventional), moral reasoning (Kohlberg 1969), which involves consistency with general abstract principles (cited in Kim and Lee 2000, p. 156). Consequently, only if   tourists become more autonomous and thus aware of intrinsic needs and motives are they able to self-actualise.As McIntosh and Goeldner (1990) explained, order is becoming less important in Western society and a desire for disorder in the tourism experience is becoming more important. Kim and Lee point out that â€Å"opportunities for unplanned action and freedom from institutionalised regulations are distinctive of Western tourists† (2000, p. 157). This indicates that tourists exhibit a certain desire to liberate their identities. According to Krippendorf (1984), in order for tourists to cease being just users of holidays, they must come to know themselves, their motives and other cultures.It may therefore be assumed that self-actualisation is an intrinsic need, characteristic of any tourist, but must be understood in terms of true self as opposed to ideal self and as such is independent of societal pressures and involves the transcendence of habitual behaviours and mindstates. This proposition requires further elaboration and must be viewed in the context of modernity, which hinders t his process but at the same time brought about its awareness.