The length of the hydrocarbon chains affects Essay Example for Free

The length of the hydrocarbon chains affects Essay The aim of this experiment is to find out whether the length of the hydrocarbon chains affects how runny the oil is. Preliminary work needed: With the apparatus that is available in the school laboratory there are 2 different possible ways in which to carry out this experiment. From doing preliminary work testing both methods we hope to find out which one will give the most accurate reliable results. This will then be the experiment we carry out in the actual experiment itself. The two different methods we could use are as follows: 1. To simply take a slide, place it at an angle and drip oil down timing how long it takes to get to the bottom. 2. The other way would be to have a thin long tube filled with the oil, and timing how long it takes a small ball bearing to travel through each different oil. Preliminary results: From testing these two methods we immediately found that method 1 would be somewhat inaccurate. We found that each time we dropped oil onto the slide it took a different path every time. Therefore each different oil will be travelling a different distance. To gain any sort of accurate results the oil must travel the same distance each time. However, we found that we could make the oil go down in a straight line, but only if the slide was placed at a much greater angle. We initially tested this with the C12 oil, and with this it was fine. Then when we tried to ensure that the angle was ok for the C6 oil also we encountered problems. The oil fell down the slide so fast it was impossible to time. From the preliminary work we soon realised that method 2 would be far more accurate. From testing various different angles to place the tube at we found that 15i let the ball bearing roll through the oil at a manageable pace to be able to time it. We also found suitable start and finish marks for which the ball could pass through. Also using this method is far more practical, engine designers, for example, have to work out how long a liquid will take to pour down a tube. The diagram below shows how many different paths the oil could take going down a slide, with a tube the U shape at the bottom keeps the ball going in a straight line. This gives us far better results to take speeds of the ball from. Method: We are going to drop ball bearings into a small narrow but relatively long tube of oil, and time how long it takes for the ball to get past a given points: We will fill the tube up with oil, starting with C6 the going all the way through up to C16. ON each oil we will drop the ball bearing in from the top, start the timer when it goes passed the start mark and stop the timer when it goes past the finish mark. It is important that we ensure there is exactly 1. 5ml of oil in the tube and also the tube is placed at 15i. We plan to take 5 readings of each oil and then take an average of the results. Apparatus needed: 1. Clamp stand 2. Stop clock 3. Semi permanent marker pen (to mark start finish points) 4. 5 ball bearings 5. Protractor 6. Oils 7. Pipette 8. Safety goggles It is important to wear safety goggles throughout this experiment as we are dealing with oils. Maintaining a fair test: Two things need to be measured in this experiment and these are the amount of oil to use and the start and finish lines. From the preliminary work we found that 1. 5ml of the oil would sufficiently fill our tube up to a given point. When deciding where to mark the start and finish points we made sure that at the bottom of the tube was enough space for 5 ball bearings to lay. When marking the finish point we took this into consideration and marked the finish point accordingly, 1. 5cm up from the bottom of the tube. This was so that when we dropped each ball bearing in the same oil we wouldnt have to keep tipping all the oil out to get the ball bearing out each time. This would have made the experiment far more messy and time consuming. When marking the start point we made sure that for the runniest oil we had, the ball baring had enough distance to pick up a greater speed than what it would be travelling through the oil. Therefore for every oil we had, the ball would immediately hit the oil and slow down. The distance this gave us from start to finish was 10cm. There will only be one controlled variable in this experiment and that is the chain length of the oils we use. For accurate results we will be using 5 different oils, these are: C6, C8, C10, C12, and C16. We are unable to use a C14 oil but hopefully the graphs plotted from the results will allow us to see what result we would have gained from a C14 oil. Everything else in the experiment will be kept a constant. That is the angle of the tube, the ball bearings, and the same person stopping and starting the clock. To ensure that our results are even more accurate and reliable we will run the test through once before we actually start to take any results. This is because when the ball bearings have been in the oil once it is extremely difficult to remove all the particles of oil, there will always be an oily residue left on the ball. So the only way to solve this would be to ensure that before taking any results the ball already has this thin layer of oil over it for every different test on each of the oils. In addition to this it is important that the ball is placed into the tube right at the top and left to roll down pushing the ball down into the tube will provide inaccurate results. Prediction: I predict that as the chain length of an oil increases, the runniness of the oil will decrease, (the ball bearing will take longer to travel through the oil). If you compare a hexane molecule (C8 H12) to an octane molecule (C8H18) it is clear that the octane molecule has more carbon atoms and hydrogen atoms: The difference between them is to do with the overall size of the molecule.

An investigation of the glucose concentration of the cell sap in potato

An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water concentration and low water concentration. As it is a special method of diffusion exclusive to water, it also allows dilute and concentrated solutions to balance their strengths. It does this by preventing large non-water particles from passing through the semi-permeable membrane due to their size, in order that the water levels on either side may equate, regardless of the solution's other contents. Osmosis is passive, that is to say it does not require energy in order to be performed. This is because it occurs solely between regions of high and low water concentration. The direction and speed of osmosis depends on the two solutions' osmotic potential. This is the measure of the pressure by which the water molecules of a solution diffuse across a semi-permeable membrane. A solution's potential is defined by its concentration. The more soluble a solution has in it, the lower its water concentration and the lower its osmotic potential. In the example below sugar molecules represent the soluble. Cell sap is contained in the vacuole of a cell and is a part glucose, part water solution. The membrane of the cell acts as a semi-permeable membrane across which osmosis occurs (see below). In the case of osmosis into and out of the vacuole, it occurs across two membranes - the plasmalemma and the tonoplast. When osmosis occurs, water may enter or leave the vacuole according to the concentration of the substances inside and outside the potato cell. In the example below we see what would happen if a plant cell were surrounded by pure water. As pure water has the highest water concentration possible, osmosis will invariably occur into the cell vacuole, which by definition contains a solution lower water concentration. The plant cell will take in as much water as is needed to make the water levels on either side of the membrane equal. As the glucose molecules cannot pass out of the cell to equate the water levels, the volume of cell sa... ...order to obtain a wider and more precise base of evidence. There is scope for further investigation of the topic in order to obtain further evidence and draw a more accurate conclusion. For example, now the concentration of potato cell sap has been identified at about 15%, a smaller range of solution strengths could be used in an otherwise identical experiment; 5 solutions of 10% and 20% concentration for example. Alternatively, investigations could be conducted into the effects of osmosis on different vegetables or more widely plants in general. For further information on the potato, the same experiment could be conducted using samples from different parts of the plant. This would establish whether different areas of a plant have differing levels of sucrose in their cell sap. Any of these suggestions would both help to support my conclusion and extend the investigation in general further. Bibliography - GCSE Biology D. G. Mackean - Biology for You Gareth Williams - The Times GCSE Revision Guides - Biology PC CD ROM - Hutchinson's Multimedia Encyclopaedia PC CD ROM - www.britannica.com - www.bbc.co.uk/education - www.homeworkhigh.com/science - www.learn.co.uk An investigation of the glucose concentration of the cell sap in potato An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water concentration and low water concentration. As it is a special method of diffusion exclusive to water, it also allows dilute and concentrated solutions to balance their strengths. It does this by preventing large non-water particles from passing through the semi-permeable membrane due to their size, in order that the water levels on either side may equate, regardless of the solution's other contents. Osmosis is passive, that is to say it does not require energy in order to be performed. This is because it occurs solely between regions of high and low water concentration. The direction and speed of osmosis depends on the two solutions' osmotic potential. This is the measure of the pressure by which the water molecules of a solution diffuse across a semi-permeable membrane. A solution's potential is defined by its concentration. The more soluble a solution has in it, the lower its water concentration and the lower its osmotic potential. In the example below sugar molecules represent the soluble. Cell sap is contained in the vacuole of a cell and is a part glucose, part water solution. The membrane of the cell acts as a semi-permeable membrane across which osmosis occurs (see below). In the case of osmosis into and out of the vacuole, it occurs across two membranes - the plasmalemma and the tonoplast. When osmosis occurs, water may enter or leave the vacuole according to the concentration of the substances inside and outside the potato cell. In the example below we see what would happen if a plant cell were surrounded by pure water. As pure water has the highest water concentration possible, osmosis will invariably occur into the cell vacuole, which by definition contains a solution lower water concentration. The plant cell will take in as much water as is needed to make the water levels on either side of the membrane equal. As the glucose molecules cannot pass out of the cell to equate the water levels, the volume of cell sa... ...order to obtain a wider and more precise base of evidence. There is scope for further investigation of the topic in order to obtain further evidence and draw a more accurate conclusion. For example, now the concentration of potato cell sap has been identified at about 15%, a smaller range of solution strengths could be used in an otherwise identical experiment; 5 solutions of 10% and 20% concentration for example. Alternatively, investigations could be conducted into the effects of osmosis on different vegetables or more widely plants in general. For further information on the potato, the same experiment could be conducted using samples from different parts of the plant. This would establish whether different areas of a plant have differing levels of sucrose in their cell sap. Any of these suggestions would both help to support my conclusion and extend the investigation in general further. Bibliography - GCSE Biology D. G. Mackean - Biology for You Gareth Williams - The Times GCSE Revision Guides - Biology PC CD ROM - Hutchinson's Multimedia Encyclopaedia PC CD ROM - www.britannica.com - www.bbc.co.uk/education - www.homeworkhigh.com/science - www.learn.co.uk

Creative Art and Fine Art Essay

By a broad definition of art,[9] artistic works have existed for almost as long as humankind: from early pre-historic art to contemporary art; however, some theories restrict the concept to modern Western societies. [10] The first and broadest sense of art is the one that has remained closest to the older Latin meaning, which roughly translates to â€Å"skill† or â€Å"craft. † A few examples where this meaning proves very broad include artifact, artificial, artifice, medical arts, and military arts. However, there are many other colloquial uses of the word, all with some relation to its etymology. The second and more recent sense of the word art is as an abbreviation for creative art or fine art and emerged in the early 17th century. [13] Fine art means that a skill is being used to express the artist’s creativity, or to engage the audience’s aesthetic sensibilities, or to draw the audience towards consideration of the finer things. The word art can refer to several things: a study of creative skill, a process of using the creative skill, a product of the creative skill, or the audience’s experience with the creative skill. The creative arts (art as discipline) are a collection of disciplines that produce artworks (art as objects) that are compelled by a personal drive (art as activity) and convey a message, mood, or symbolism for the viewer to interpret (art as experience). Art is something that stimulates an individual’s thoughts, emotions, beliefs, or ideas through the senses. Artworks can be explicitly made for this purpose or interpreted on the basis of images or objects. Although the application of scientific knowledge to derive a new scientific theory involves skill and results in the â€Å"creation† of something new, this represents science only and is not categorized as art. Often, if the skill is being used in a common or practical way, people will consider it a craft instead of art. Likewise, if the skill is being used in a commercial or industrial way, it may be considered commercial art instead of fine art. On the other hand, crafts and design are sometimes considered applied art. Some art followers have argued that the difference between fine art and applied art has more to do with value judgments made about the art than any clear definitional difference. [14] However, even fine art often has goals beyond pure creativity and self-expression. The purpose of works of art may be to communicate ideas, such as in politically, spiritually, or philosophically motivated art; to create a sense of beauty (seeaesthetics); to explore the nature of perception; for pleasure; or to generate strong emotions. The purpose may also be seemingly nonexistent. Art is a diverse range of human activities and the products of those activities; this article focuses primarily on the visual arts, which includes the creation of images or objects in fields including painting, sculpture, printmaking, photography, and other visual media. Architecture is often included as one of the visual arts; however, like the decorative arts, it involves the creation of objects where the practical considerations of use are essential—in a way that they are usually not for a painting, for example. Music, theatre, film, dance, and other performing arts, as well as literature, and other media such as interactive media are included in a broader definition of art or the arts. [1] Creative arts is a subject of study for a number of universities, including those that offer a degree of Bachelor of Creative Arts. [1] Areas of study include dramaturgy, music, graphic arts/cartooning, performing arts, film, publishing, galleries, museums, and the visual arts.

How to Study Effectively Essay

lace where you can work regularly. This place should be dedicated to study, free of potential distractions from friends or family — yes folks, even your cat. Regular work in such an environment helps form good, effective study habits, and improves concentration and focus. Distractions waste precious time and cause tension. Get rid of clutter. Keep things simple — keep things tidy. Get a study timetable organized and prioritize. Prepare a list or timetable for tasks for that day, and for the week and number them according to which ones need to be done first. These get the priority and will not necessarily be the easiest. Mark and label all your work folders and content and place them in separate piles so that you can clearly see how much work you need to do and what has already been revised. Tick off the tasks as they are completed. Make sure that the area for your study is well lit and has an ambient temperature where you can focus. The quality of focus determines the quality of understanding. You cannot apply what you learn without understanding and exams test your ability to apply what you have learnt. The Motivation for Learning should be clear — top grades will mean higher earnings and a better quality life. Learn to work for them†¦ Food: What you eat affects your thinking. The Rule is Eat Little — but often. Eat healthy meals such as fish, fruits, and sandwiches that provide the vitamins and minerals that you need and do not make heavy demands on your digestive system. Know when You are ‘Switched On’. Try to be aware of your bio clock and what time of the day you work best. Optimise by revising when you work best but keep an eye on the exam date and time. You will need to get used to working at that hour. Do The Challenging Revision First — when you are fresh. Trying to focus on difficult problems when you are tired can be difficult. Look after your physical health. Take regular breaks, get plenty of fresh air and do some walking or stretching. Study in small chunks lasting 25 to 35 minutes. Your memory and concentration will work better if you study in short bursts but often†¦

A Look At Muslim Birth Rites Religion Essay Example

A Look At Muslim Birth Rites Religion Essay Example A Look At Muslim Birth Rites Religion Essay A Look At Muslim Birth Rites Religion Essay Moslems have some really simple rites for welcoming a kid. The babe s first gustatory sensation should be something sweet, so parents may masticate a piece of day of the month and rub the juice along the babe s gums. It was a pattern carried out by the Prophet Muhammad and is believed to assist bantam digestive systems to kick in. There are a figure of events that take topographic point on or after the 7th twenty-four hours. After seven yearss the babe s caput is shaved ( a tradition besides carried out by Hindus ) . This is to demo that the kid is the retainer of Allah. Although Hindus may take the babe s hair to India and spread it in the sanctum river Ganges, Muslims weigh it and give the tantamount weight in Ag to charity. Ideally, Muslim babe male childs are circumcised when they are seven yearss old although it can take topographic point any clip before pubescence. It is besides tradition to take a name for the babe on the 7th twenty-four hours. The aqeeqah is besides traditionally carried out on the 7th twenty-four hours. This is a jubilation which involves the slaughter of sheep. Sheep are sacrificed ( in Britain the meat is ordered at the meatmans ) and the meat is distributed to relations and neighbors and besides given to the hapless. The reaching of a new babe is a affair of great joy for any household. For the Muslims, this occassion is described as glad newss from Allah in the Holy Quran. Hence Muslims welcome the new babe in an ehsan manner . This means that the birth of a babe is celebrated in a manner that is prescribed by the dictates of Shariah and the traditions of the Holy Prophet ( peace and approvals of Allah upon him ) . ~Dua for the new born baby~ The birth of a babe is a ground to observe, to joy and to thank Allah for His Blessings. To compliment Muslim parents upon the birth of the babe, it is mustahib ( preferable act ) to state: You have been blessed in what you have been given. May you give thanks to the One who granted it. May your kid reach adulthood and right-guidance, and may Allah do him/her a approval for you. ~Welcoming the baby~ It is forbidden by Allah and His Messenger ( peace and approvals of Allah upon him ) to demo letdown over the sex of the babe. In pre-Islamic epoch, the birth of a girl was greeted with plaints of suffering and sorrow. Sons were much preferred and pre Islamic Arab male parents used to bury their infant girls in sand. This pattern has non changed much in some civilizations but as Muslims we should cognize that boies and girls both are approvals from Allah. The act of ungratefulness and harbouring evil ideas for the guiltless babe has been declared a wickedness in the Holy Quran. The preferable act is to ask after the babe s wellness and general well being and so thank Allah in these words All congratulations and thanks for Allah, Lord of all creative activity . ( Bukhari ) ~Azan in the ear~ After the babe is cleaned and dressed, a male grownup normally the male parent or a gramps recites adhan ( call for supplication ) in the right ear and iqamah ( proclamation for get downing the supplication ) in the left ear. Hence, the first sound that reaches the ears of the neonate is the call to Allah and the testimony that Allah is Great. The sound of the adhan besides keeps the little babe safe from immoralities by driving Satan off. ~Tahneek~ It is in the tradition of Holy Prophet ( peace and approvals of Allah be upon him ) to offer the Tahneek to the babe. For tahneek a day of the month or a sweet thing like honey is softened and placed in the neonate s oral cavity. This act is followed by invocation to Allah to bless the babe. ~Naming the baby~ Many parents decide the name of the babe before the birth if they have ascertained the babe sex beforehand. Some parents maintain two names in head, one for the male and the other for the female progeny. It is allowable to call the babe right after his birth or delay for seven yearss. The name must hold a good significance. It is customary amongst the Muslims to call their babe after the properties of Allah, His Prophetss who came before Prophet Muhammad, the names of Prophet Muhammad, his baronial comrades and other pious personalities. The babe should non be named after those who defied Allah and His Messengers. ~Aqeeqah and Circumcision~ The Prophet Muhammad ( peace and approvals of Allah be upon him ) said: For the male child there should be an aqeeqah. Slaughter ( an animate being ) for him and take the harmful thing [ i.e. , the foreskin ] from him. January 1 is besides compulsory in instance of a male child and should be done every bit shortly as possible. The new born babe s caput is besides shaved and an sum of Ag equal to the weight of his hair is given to the hapless. For the aqeeqah , Muslims forfeit two sheep for a boy and a individual sheep for a girl. The meat can be distributed amongst household members or the same can be cooked and everybody invited to a banquet to observe this event. Gifts and money are normally given by friends and household members to the proud and happy parents on this happy juncture. Birth Two rites accompany the birth of a kid. First, the Call to Prayer is whispered into the neonate s right ear as the first sound it hears. This act symbolically brings the babe into an consciousness of Allah from the first minute of life. This is accompanied by reading from the Quran and other little rites. Second, after a few daysaa‚Â ¬ imposts in some states specify seven daysaa‚Â ¬ a appellative ceremonial is held. At a assemblage of household and friends, the kid is officially given a name, and frequently a lock of hair is cut from its caput. This is frequently accompanied by other rites, such as a repast, forfeits, readings from the Quran, and so on. On rite frequently practiced is that of almsgiving. The babe is weighed and an tantamount sum in Ag is given to charity. The naming ceremonial besides serves as an entryway rite for those who convert to Islam subsequently in life. During it, they receive an Islamic name, normally in Arabic, and seen to be freshly born into the religion. Muslim belief holds that all males should be circumcized, although at what point in a childaa‚Â ¬a„?s life this happens is non specified. It is frequently performed when the male child is still a yearling. Traditionally, the Circumcision was accompanied by a jubilation, while today is often takes topographic point in a infirmary clinic.

School Gossip Can Destroy Teachers and Staff Members

School Gossip Can Destroy Teachers and Staff Members A teacher conducts an activity to show her class just how silly gossip can be. She whispers something to a student and then that student whispers it to the next until it had been passed to every student in class. What started as, We are going to have a long three day weekend starting tomorrow ended up as, We will be lucky if three of you arent killed this weekend. The teacher uses this activity to teach her students why you shouldn’t believe everything you hear. She also discusses why it is essential to stop gossip instead of helping to spread it.​ The lesson above is sadly not limited to the students in the school. Gossip runs rampant in just about any workplace. Schools should be a safe haven where this is not a significant problem. The faculty and staff within a school should never start, participate in, or promote gossip. However, the truth is that all too often schools are the focal point of gossip in the community. The teacher’s lounge or the teacher’s table in the cafeteria is often the center of where this gossip occurs. It is mind-boggling as to why people need to talk about what is going on with other people. Teachers should always practice what they preach. Particularly those who have seen the negative impact gossip has had on their students. The truth is that the effect of gossip can be the same or worse as an adult. When Empathy Proves Elusive As a teacher, you have so much going on in your own classroom and life that it can be difficult to truly understand that there is just as much or more going on in every other classroom and co-workers lives. Empathy sometimes proves elusive when it should be commonplace. Gossip is frustrating because it builds walls between teachers and staff members that need to be working together. Instead, they feud because someone said something about the other to someone else. The entire idea of gossip among a school faculty and staff is disheartening. Gossip can split a schools faculty and staff in half and in the end, the people who are hurt the worst will be your student body As a school leader, it is your job to discourage gossip among the adults in your building.  Teaching is difficult enough without worrying about what others are saying.   Teachers should have each other’s back, not talk behind each other’s back. Gossip creates a large part of your discipline issues with students, and it will create even larger problems within your faculty and staff if it is not dealt with quickly. The key to minimizing the gossip issues among your faculty/staff is to educate them on the topic. Being proactive will go a long way in keeping gossip issues to a minimum. Have regular conversations with your faculty and staff members discussing the bigger picture about the damage that gossip can cause. Furthermore, implement strategic team build activities that bring them together and naturally forge solid relationships. When it comes to gossip, make sure they know what your expectations are and how you will deal with it when it becomes an issue. How to Proactively Defeat Conflict It is also not realistic to have a faculty and staff where there is never any conflict. A policy or set of guidelines must be in place when this happens that leads towards resolution between the two parties instead of division. Encourage your faculty and staff members to bring these issues to you and then act as a mediator between the two parties. Having them sit down together and talk out their issues will help. It may not be effective in every case, but it will peacefully solve the majority of conflict issues that you have with your faculty and staff. It is better to take this approach than to have them gossiping about it with other members of the faculty and staff which can lead to bigger issues down the line.

Operation Management Essay Example | Topics and Well Written Essays - 2750 words

Operation Management - Essay Example Operations management must be strategized to enable competitiveness. Such can be achieved if the entrepreneurs proficiently practice financial management, customer care satisfaction, operation risk management, innovation and creativity in business management, as well as regular monitoring or evaluation of performance using standard index of measure. Other than protecting capital and investments from foreign exchange losses, it is also essential to undertake strengthening activities to improve organizational performance and to critically understand the market trend using behavior-analysis for them to nurture change adaptability especially when foreign exchange rate in the market is reel to fluctuate. Slack et. al. pointed that performance is improved if an organization is adherent to total quality control to do what is right to maintain an effective and quality operation that is cost-efficient; do functions and roles efficiently to effectively deliver services; perform jobs timely to nurture reliance in the delivery of goods and services; and to practice flexibility in the production of goods or delivery of services based on supply and demand situation in the market. 2.2 Operations performance for efficiency and competitive advantage Learn from experiences. Tardiness doesn’t favor business. Business must be dealt with efficiency thus, it is important for the organization to maintain effective operational technology to spare procedural dysfunction or breakdown; strengthen time utilitization as against absenteeism; and optimization of quality standards of job performance to develop a culture of efficiency in the workplaces. In so doing, entrepreneurs should produce goods with quality standards in accordance to policies and scale or context of economies. The organization must also prefer highly-skilled and well-trained human resources who are willing to out-perform other competitors in the market. As such, other than their inherent capacities, workers should be measured with their actual output as against goals and of key results as against the period of time allotted for the perfection of production or delivery of service. This is very significant in supply chain management of the retail industry. 2.3 Suppl y chain management in retailing Supply chain management (SCM) refers to the mechanism adopted by retailers in the performance of their business operation which specifically deal with the transport of goods and services from its production or site to its consumers (Kavcic, 2006). Retailing is the significant last step in this system where entrepreneurs match goods with consumers needs within the context of supply and demand relocations. SCM enhances organization’s performance to enable the integration and interaction of internal and external relations between suppliers, retailers, customers, or buyers.