2 Ways To Make a Model Comet That Makes a Tail

2 Ways To Make a Model Comet That Makes a Tail   A real comet is a mixture of several materials. While each comet has its own unique chemical signature, most of them contain water ice, organic compounds, dust, and rocky or stony chunks. Its fun to make your own comet and expose it to a simulated solar wind to observe its behavior. Heres how to make a model comet that behaves like the real deal. This particular recipe uses solid carbon dioxide (dry ice) so that it will sublimate into a comet tail when exposed to heat. Feel free to substitute ingredients to see what effect they have on your model. Use caution with the dry ice. It is extremely cold and can give you frostbite if you touch it. Wear gloves! Dry Ice Model Comet Materials A bowl or pot large enough to hold your ingredientsA cup of water (it will freeze into ice when mixed with the cold dry ice)A cup of dirt (this contains organic compounds and grit, like a real comet)A cup of sand (many comets contain silicates, like sand or quartz)Some charcoal (comets contain dark material, which can be carbon, like charcoal)A bit of household ammonia or window cleaner (ammonia is a nitrogen compound observed in comets)A couple of cups of crushed dry ice (carbon dioxide is common in comets)Syrup (optional: adds organic compounds and helps the comet stick together)Newspaper (optional: place it on your workspace to make clean-up easier) Make the Comet If your dry ice arrives in large chunks, you can place it in a paper bag and smash it with a hammer to crush it. If you get dry ice pellets, you can use them as they are. Use a wooden spoon or gloved hand to mix together the ingredients and crush them together to make a lumpy ball. Like real comets, your model may break apart. One tip to help it stick together is to let it rest for a couple of moments before picking it up and examining it. You can simulate the solar wind to make a comet tail by blowing on the model. The heat of your breath will mimic the warmth of the sun. Do you smell the ammonia? Real comets smell a bit like window cleaner! Liquid Nitrogen Comet Another way to simulate a comet with a tail is to use liquid nitrogen. For this comet, you dip a porous, rocky material into liquid nitrogen and remove it to see the vapor trail. Since liquid nitrogen is even colder than dry ice, youll want to use long-handled tongs. A good material for the rocky comet is a charcoal briquette. Compare the Simulated Comet To a Real Comet Comets that we see come from either the Oort Cloud or the Kuiper Belt. The Oort Cloud is a sphere of material that surrounds the solar system. The Kuiper Belt is a region located beyond Neptune that contains many icy bodies within range of the Suns gravity. A real comet may be considered to be a sort of dirty snowball made of frozen water, dust, rocks, and dust. There are three parts to a comet: Nucleus - The dirty snowball part of the comet is its nucleus, which consists of meteoritic dirt, frozen gases (like dry ice), and water.Coma - As the nucleus of the comet moves close enough to the Sun, it warms and the frozen gases sublimate into vapor. The vapor pulls dust particles with it away from the nucleus. Light reflecting off the dust accounts for the fuzzy shape of a comet.Tail - Comets are in motion, so they leave a trail of gas and dust in their wake. The solar wind also pushes matter away from the comet and ionizes it into a bright tail. Depending on its location, a comet may have one or two tails.

Liquid Nitrogen Activities and Projects

Liquid Nitrogen Activities and Projects Are you looking for an activity or project with liquid nitrogen? This is the most extensive list of liquid nitrogen ideas youre likely to find: Make liquid nitrogen ice cream.Make Dippin Dots type of ice cream.Fill a whistlings include wine or soda. Youll get a cool fog effect, plus a cool drink.For a party or group, freeze graham crackers in liquid nitrogen. Wave the cracker around to warm it up a bit and eat the cracker. The cracker has an interesting texture, plus people eating crackers will be spouting clouds of nitrogen vapor. Miniature marshmallows also work quite well. The risk of injury from either food is quite low. Freeze a banana in liquid nitrogen. You can use it to hammer a nail.As a demonstration that even antifreeze freezes if its cold enough, solidify antifreeze using liquid nitrogen. Dip a carnation, rose, daisy, or other flower in liquid nitrogen. Remove the flower and shatter its petals in your hand.Use a squirt bottle of water to spray designs into liquid nitrogen vapor.Spin a tub of liquid nitrogen to create a vapor vortex. You can float paper boats or other lightweight objects in the maelstrom.Pour a cup of liquid nitrogen into about a liter of warmed bubble solution to produce a mountain of bubbles.Pour a small amount of liquid nitrogen into a Pringles can and pop the lid on. The vapor will (loudly and forcefully) pop the lid off.Break an incandescent light bulb (type with a filament). Turn it on in the liquid nitrogen. Cool glow!Bounce a lightweight hollow ball on a hard surface. Immerse the ball in liquid nitrogen and try to bounce it. The ball will shatter rather than bounce.Pou r liquid nitrogen onto weeds to kill them. The plant will die with no toxic residue or other harm to the soil. Examine the color change of LEDs under normal temperatures and in liquid nitrogen. The band gap of the LED increases at lower temperature. Cadmium red or cadmium orange- bandgap of Cd(S,Se)- are good choices.Foods high in water will break with a tinkling sound like glass when smashed. Orange segments are a good choice for this project.Insert flexible rubber or plastic tubing into a dewar of liquid nitrogen. The nitrogen will spray out the end of the tubing onto you or the audience, etc. so use care that you have protection on the hand holding the tubing and that there is enough distance at the top of the tubing for the nitrogen to vaporize before contacting with people. Although the tubing is flexible at room temperature, at liquid nitrogen temperature it becomes brittle and will shatter if hit with a hammer or whacked on a lab bench. If you twist the tubing around itself before putting it in the nitrogen, the tubing will uncoil itself as it thaws, in a sort of serpentine manner.

Human Resource Development-- Assignment Example | Topics and Well Written Essays - 500 words

Human Resource Development-- - Assignment Example As Coates (2010) explains, acquiring new knowledge, attitudes and skill sets in one environment and applying them in another may be affected by several factors. Effective and the experience of the trainer is a very essential factor in influencing the training transfer to job places. Any trainer must be a fluent and effective communicator (Coates, 2010). This facilitates the conversations and ensures the learners’ needs are met, a clear and effective presentation of the material that makes the information interesting. Another factor is the in-class and out-class practice. More of this practice ensures the learner gains enough experience of handling cases, and it is easier to transfer the training to workplaces in case a similar case appears as to that tackled during the practices (Coates, 2010). An organization should also mount some quality pressure on the trained employees to work as of their acquired knowledge and towards the set goal of the organization. This will ensure th at the employees apply their learnt skills at their workplaces effectively. Needs assessment are usually conducted so as to facilitate the growth of employees of a company in terms of the knowledge and skills they possess. This helps the organization to know the type of employees in the organization, how to train them and what they need to be motivated. According to Barbazette (2004), a needs assessment is conducted to link a deficiency in performance to a desired result and ensure that appropriate training is formulated and conducted to combat the problems caused by the deficiency. To do this, an organization needs to analyze their needs and wants by conducting a performance analysis to identify which skill shortcomings can be bridged through training. To conduct a training needs assessment, an organization will have to first gather information for aiding in appropriate

Interpersonal conflict between stakeholders Essay

Interpersonal conflict between stakeholders - Essay Example Three per cent of nurses reported verbal threats (Whitworth, 2008). Distress was experienced by 66%. Females were the main perpetrators. Conflict had been described as a social behavior between individuals who attempted to gain something both could not have (Moss, 2002). Nursing conflicts had been termed as role conflict (Cooper, 2003), burnout (Poncet, 2007), horizontal violence (Abu Alrub, 2004) and intergenerational conflict (Swearingen & Liberman, 2004).Reflection and the impact on work practices and stakeholders  Conflict constituted most of the management problems in nursing. The hospital environment or primary care or community centers worked well and efficiently partially due to the efficacy of conflict management. The variety of people with diverse â€Å"perceptions, personalities and behaviors† could ignite a problem at any moment (Sikes, 2010). The common goals were what brought them together. Barriers were inevitable but efforts to prevent conflicts needed to com e from the right quarters. The idea was not to totally prevent the conflict but to manage it well so that a creative style with classic decision-making produced improved outcomes. Cohesion of the group was ensured through the efficient management of conflict. Too much conflict was conducive to frequent sparring and a decrease in performance; group cohesion suffered in the long run. Conflicts could arise between any of the stakeholders in a health environment: between nurses, nurses and doctors, nurses and patients.... Nursing conflicts had been termed as role conflict (Cooper, 2003), burnout (Poncet, 2007), horizontal violence (Abu Alrub, 2004) and intergenerational conflict (Swearingen & Liberman, 2004). Reflection and the impact on work practices and stakeholders Conflict constituted most of the management problems in nursing. The hospital environment or primary care or community centers worked well and efficiently partially due to the efficacy of conflict management. The variety of people with diverse â€Å"perceptions, personalities and behaviors† could ignite a problem at any moment (Sikes, 2010). The common goals were what brought them together. Barriers were inevitable but efforts to prevent conflicts needed to come from the right quarters. The idea was not to totally prevent the conflict but to manage it well so that a creative style with classic decision-making produced improved outcomes. Cohesion of the group was ensured through the efficient management of conflict. Too much confl ict was conducive to frequent sparring and a decrease in performance; group cohesion suffered in the long run. Conflicts could arise between any of the stakeholders in a health environment: between nurses, nurses and doctors, nurses and patients, nurses and the patients’ families, doctors and patients’ families, nurse manager and staff nurses, staff of different categories and between policy makers and the hospital industry. The nursing profession needed to handle conflicts with confidence and evoke the best results. The resolution of the conflict The nurse manager had to use her skills of communication and interpersonal skills to identify the main problem of the conflict by

Receiving Higher Education Essay Example | Topics and Well Written Essays - 250 words

Receiving Higher Education - Essay Example I am a graduate of the College of Education for Home Economics and Arts and I have acquired some experience in handcrafting and fashion design. I volunteered for summer activities for a charity foundation, some of which I actively participated in the planning process. I worked at one of Saudi Arabia’s largest firms where my job description included planning and management. Working with a team to look for means on how to improve employee performances and manage human resources was fascinating and the experience sparked my interest in public relations. Furthermore, the team was indulged in project analysis and plan examinations. I helped plan entry strategies, expansion, and diversification, as well as company businesses. As part of the team, I have carried out preliminary feasibility studies. I studied the details of the organizational structures of one of the largest manufacturers of automatic doors and determined what needed to be restructured for the benefit of the employers and the company. I also studied their system, taking note of the strengths and weaknesses and I also helped redesign it. Since I did not have sufficient training in the aforementioned tasks, I relied on internet sources for the knowledge I needed on planning techniques and management skills. I searched reliable sources like articles, news reports and online books that informed me a lot about planning and management.Building relations with individuals in the community has also been a key focus of mine.

Role Of Womens Rights In Afghanistan

Role Of Womens Rights In Afghanistan Do you think that Afghan nation from the outset needs only men to serve it? Before Islam, women were treated like slaves or property. Their personal consent concerning anything related to their well-being was considered unimportant, to such a degree that they were never even treated as a party to a marriage contract. Women were used for one purpose, and then discarded. They had no independence, could own no property and were not allowed to inherit. In times of war, women were treated as part of the prize. Their condition was unspeakable. In addition, the birth of a daughter in a family was not an occasion for happiness, but was regarded as embarrassment. The practice of killing female children was uncontrolled. With the arrival of Islam a verse came from the Quran criticizing those who practiced female infanticide: And when the news of (the birth of) a female (child) is brought to any of them, his face becomes dark, and he is filled with inward grief! He hides himself from the people because of the evil of that whereof he has been informed. Shall he keep her with dishonor or bury her in the earth? Certainly, evil is their decision (An-Nahle 16:58-59). Afghanistan is the only country in the world where women are symbolized to all other countries. Afghan womens current situation is not only the result of Taliban, but there exists a history over the centuries of Afghan womens situation. Afghanistan is a country that lost all its economical infrastructures passing three decades of war, has been faced with Economical, Social and cultural problems. One of the major problems that Afghans are suffering is violence against womens rights. Taking in to consideration that many activities have been accomplished since 2001 by international and governmental organizations but statistic show that problems have been remained and vast number of women are still suffering from violence. Many of women are deprived from education. A few women participate in political and social activities. As observed in Kabul, a woman suffers from violence every 30 minutes and 3% of women participate in governmental decision making activities. Only 11 percents of women were candidates in the 2010 parliamentary elections. Some of the challenging facts Afghan women faces in daily life are listed as following: Every 30 minutes, an Afghan woman dies during childbirth, 87 percent of Afghan women are illiterate, 30 percent of girls have access to education in Afghanistan, 1 in every 3 Afghan women experience physical, psychological or sexual violence, 44 years is the average life expectancy rate for women in Afghanistan, and 70 to 80 percent of women face forced marriages in Afghanistan (The Plight of Afghan Woman) Since the fall of the Taliban in late 2001, many people would agree that the political and cultural position of Afghan women have improved substantially. The recently adopted Afghan constitution states that the citizens of Afghanistan whether man or woman- has equal rights and duties before the law. So far, women have been allowed to return back to work, the government no longer forces them to wear the all-covering burqa, and they even have been appointed to top positions in the government. Although many people believe that women have equal rights to men, but Afghan women, especially in the rural areas of Afghanistan are not equally treated and their rights are violated. Women are not allowed to get education, women are forced into early age marriage and they have no right to work equally with men and take part in social activities. In many societies today, especially in Afghanistan, a woman is only valued and considered important if she performs the functions of a man, while displaying her feminine attractions to the public. If women get involved in politics, they would stop marrying, having children, and the human race would greatly be affected. Women are emotional creatures, and incapable of making a sound political decision. Afghan men, Typically among Pashtun families, parents believe that their daughters going to school is an immoral act, such as: being friend with the boys and then claiming to marry with the boy of their own choice. They have the ideas saying that their daughters may adopt non-cultural behaviors at school, such as: changes in their clothing, adapting modern clothing and ways of thinking, which are not accepted in Afghan culture. In most afghan families, relatives and friends advise each others for not letting their daughters attend school. A girl is considered as a financial burden on her parents; therefore, parents give their daughters to men who are in their fathers age to receive marriage cost and lessen their home expenses. In the most provinces of Afghanistan, girls are sold to men without knowing a girls consent, and then these girls are used as labors by her husband and in-laws family for carrying physical loads of the whole family. First, its known that education, especially for girls is among basic requirements for an improved life standard in any society, however 85 percents of women and girls are illiterate in Afghanistan. The United States of America International Aid (USAID) allocated fund to address this challenge that constitute the lowest educational level in the country, and girls are facing many problems in this area. Womens education is a foundation for building womens human capital and a requirement for their meaningful participation, effective leadership, and enjoyment equal of rights. Although, the womens right to education is legally protected by law, the Afghan women have been long deprived of their right to education and still the participation of girls and women in various levels and fields of education is limited and they face numerous constraints. Access to equal education opportunity still is a dream for many women. Despite of educational improvements in recent years, women still face a num ber of obstacles in their way to education such as early marriage; restricted movement; cultural barriers, security, transport constraints, shortage of qualified female teachers especially in rural areas, poor school infrastructure and facilities and the lower value attached to girls and womens education. In Afghanistan, the number of girls going to school is less than half the number of school boys and even in some provinces, like Zabul, this percentage is 3%; though the numbers of male and female populations aging between 6-18 year old dont have a considerable difference. Another problem in terms of education in Afghanistan is the number of female schools including elementary and high schools that has decreased considerably. In Kandahar, for example, there are 255 elementary schools, whilst 20 high schools exist in the city. In central region of the country there are 256 elementary schools and only 27 high schools, which show unwillingness of girls to study (Commission). Nearly 10 00 girls schools have been destroyed. Girls and teachers have been killed in a return of the Taliban reign of terror. Only 18% of Afghan women have skilled medical personnel present when they give birth (Feminism, Womens Rights Articles Issues). In Paktia province last year, a shura of elders decided that a 25-year-old man who sexually abused a 7-year-old relative girl should pay compensation to the childs family. They also decreed the girl should marry her rapist when shes older (The Star). Due to fear of Taliban or local warlords, girls cannot go outside their homes. If they go to schools, they are burnt, acid is thrown on their faces, or Taliban kill their family members. Almost in all provinces of Afghanistan girls are sexually abused and harassed. Girls are kidnapped on their way to school. They are kidnapped for different purposes by the Taliban or local warlords, to make money by selling them or to use for smuggling, or marry them by force. Second, forced marriages constitute the other serious problems of women in Afghanistan which is exercised on different ways and forms as to payment of huge dowry, underage marriage, engaging in the very early days when a child is born. Widows are still considered as a heritage and are not allowed to marry other man willingly. Forced marriage is considered to be one of the main cases of women rights violation in all over the country. For instance, only in Helmand Province 144 cases of forced marriage is registered by the Commission so far this year, mostly exercised as badal (girls exchange in families for marriage) and huge payment of dowry. In many parts of Afghanistan, marriages have taken place with threats by the powerful people, gunmen or in repayment for depts. Another reason considerably increases the number of early age marriages is the poverty in Afghan families. Third, in Islam, the value and importance of women in society and the true measure of their success as human beings, is measured with completely different criteria: their fear of Allah (SWT) and obedience to Him, and fulfillment of the duties he has assigned them, particularly that of bearing, nurturing and teaching children. Islam is a practical religion, and responds to human needs and life situations. Many women need, or wish, to work for various reasons. For example, they may possess a needed skill, such as a teacher or a doctor. While Islam does not prohibit women working outside the home, it specifies that the following restrictions be followed to safeguard the dignity and honor of women and the purity and stability of the Islamic society. Muslim women are not forbidden from going out in the community, working, or visiting relatives and female friends, if there is no objection from their guardian/husband and they are covered and behave and speak according to Islamic guidelines and, if necessary, escorted by their Mahram (male relative). However, a womans home should be the main base that she works from. Allah (SWT) instructed the wifes of the Prophet (SAW): O wives of the Prophet! You are not like any other women. If you keep your duty (to Allah), then be not soft in speech, lest he is whose heart is a disease (of hypocrisy or evil desire for adultery, etc.) should be moved with desire, but speak in an honorable manner. And stay in your houses, and do not display yourselves like that of the times of ignorance, and offer prayers perfectly (Iqamat-as-Salat), and give Zakat and obey Allah and His Messenger. Allah wishes only to remove Ar-Rijs (evil deeds and sins, etc.) from you, O members of the family [of the Prophet (SAW)], and to purify you with a thorough purification (Quran Al-Ahzab 33:32-33). Afghanistans social development can only be ensured through democracy and the reduction of poverty, the success of both being assured through full participation of women, especially in rural Afghanistan. Afghanistan has always had elite and middle-class women who asserted their rights and walked towards modernization. But a lot of most Afghan women in rural areas have been one of oppression through tribal customs and dictates. Womens rights are human rights. They are not simply American, or western customs. They are universal values which we have a responsibility to promote throughout the world, and especially in a place like Afghanistan. It is not only the right thing to do; it is the smart thing to do.

Writing an Essay :: Writing an Essay

How to Write an Excellent Essay Excellent essays get results. A well-written essay can earn you a scholarship or entrance into your favorite college. Many essays win contests and prizes and encourage others to live better lives. Well written essays turn the hearts of the people. Early America was motivated to fight for freedom from England because of the writings of Thomas Paine, Benjamin Franklin, and Thomas Jefferson. Your well-written essays might be printed in newspapers and make a positive impact in the lives of others. You can change cold hearts and encourage fellow believers by your written words. To write a good essay, one must have a particular point to make. A well-written essay includes an interesting point to ponder in the introduction, an assortment of solid facts to emphasize the point in the body, and a strong summation in the conclusion. If you are writing for a contest or scholarship, then the topic suggestions may be given to you. If you are practicing writing essays and you cannot come up with a topic, try writing emotional statements. Here are some ideas: I hate abortion! Income tax is against the Constitution! There is NO speparation of church and state in the Bill of Rights! Israel has the right to defend itself from terrorism.... etc. Start your essay with a grabber statement, quote or question. Be sure that you hook your reader’s attention. Expound on your opinion or your concern with a few sentences explaining your point of view. The next part of your essay needs to have clean clear facts to back up your powerful point. Here is where you can quote other people. A good essay does not always have to be only about your own opinion. You will be more effective if you integrate other’s opinions or facts and data to back up your point of view. Try to give a few facts with a sentence or two to explain each fact with clear supporting points. Be sure to use good connecting phrases to connect your facts. For example, begin with your main point and why you are concerned. * Excellent Essays Get Results The need to write excellent essays is more important today than ever. Well-written essays can earn scholarships, change hearts and open doors once closed by bigotry and prejudice. Then start explaining your position by writing clear exact facts or well documented solutions to the problem.