The percentage energy loss when a ball Bounces Essay Example for Free

The percentage energy loss when a ball Bounces Essay This investigation will be to determine the relationship between the length of a conductor and its resistance. The aim is to test a number of different lengths of nichrome wire to measure the resistance of each length. To ensure a safe procedure, a low voltage battery of 12 volts will be used, and the samples to be tested will be located on an insulating mat to prevent any shorts occurring. In addition a 2 Amp fuse will be placed in the circuit as a protective measure. For a fair test, all other parameters that can affect the resistance will be kept constant. These are the sample material, the diameter of the wire, and the temperature of the wire. To keep the temperature of the wire constant, it will be necessary to keep the current flowing in it constant. This is because the power dissipated in the conductor is I2R, so an increase of current by a factor of 2 will increase the power dissipated by a factor of 4, which can seriously affect the resistance. Thus only the length of the wire will be changed, and the corresponding voltage across it to give the same test current will be varied and measured. The resistance of the test sample will then be given by Ohms Law: Resistance = Voltage (Volts) ( Ohm) My prediction is that the resistance of the wire will be proportional to its length, all other variables being kept constant Equipment The equipment used for this investigation consisted of: 1) 12 volt power pack with on/off switch 2) Variable resistor (rheostat) 3) A 2 amp ammeter with digital readout to 0. 001 amp accuracy 4) A 20V voltmeter with digital readout to 0. 01V accuracy 5) Crocodile clips for connection of the test sample into the circuit and the voltmeter to the connecting crocodile clips. 6) Test samples consisting of varying lengths of 24 SWG The equipment and the circuit configuration used is shown in Fig 1. A 12-volt power pack will be connected in series with a switch, a 2-amp fuse, an Ammeter, a variable resistor and a sample test wire. A voltmeter will be connected across the test sample by crocodile clips. The test sample was connected into the circuit using crocodile clips. The voltmeter was connected across the sample into the rear of the crocodile clips. The plan will be to vary the sample length from 10 cms to 100 cms in 10 cm increments to provide a good range of results. Also to take readings of three samples for each length, and average the voltage readings to reduce possible errors. There are four factors that will affect the resistance of a wire. These are: 1. As the length of a wire increases, the resistance of the wire also increases. A variable resistor or rheostat is used to vary the current in a circuit. As the sliding contact moves, it varies the length of wire in the circuit. 2. As the cross-sectional area of a wire increases, the resistance of the wire decreases. An analogy of this is a water pipe, if the diameter of the water pipe is small the water flowing through will. Experience high resistance to the rate of flow. However if the diameter of the water pipe is large, the water flowing. Through it will experience low resistance to the rate of flow. 3. Different types of materials will affect the resistance in different ways. Materials such as copper, are very good conductors, and is used for connecting wires. Other materials such as nichrome (as used in the investigation) have a higher resistance than copper, and so is used in the heating elements of electric fires. 4. As the temperatures of a wire increases, the resistance of the wire increases as well. This is used in resistance thermometers, which use the fact that electricity does not flow so easily through a wire when the wire gets hot. Resistance is the opposition to the flow of charge. In metals, a sea of free electrons enabling it to conduct electricity surrounds a lattice of positive ions. The shorter the length of wire, the less energy is needed to move the electrons across the wire If the metal is attached to a power supply then the electrons flow through the metal but collide with atoms. Resistance is shown below in the diagram below: The resistance of a metal can be regarded as arising from the interaction, which occurs between the crystal lattice of the metal and the free electrons as they drift through it under an applied potential difference. This interaction is due mainly to collisions between defects in the crystal lattice (e. g. impurity atoms and dislocations) also play a part, especially at very low temperatures. Resistance is measured in Ohms (? ) Georg Ohm discovered that the current flowing through a metal wire is proportional to the potential difference across it (providing the temperature remains constant). Therefore: Resistance, R (? ) = Potential difference across the wire (V) I= V i R V= I x R R= V i I TABLE 1 RESULTS: Table 1 shows the data recorded and the resulting values for resistance for each length. These were those separate samples of the conductor tested for each length, and the average voltage was used to determine the resistance volume. Graph 1 plots the resistance against length for the range of test samples from 10cm to 100cm. The graph shows the data to be in very close proximity to a straight line, verifying the prediction to its length. From the best fit line drawn on the graph, the resistance per unit length of 24 SWG nichrome wire is found to be 0. 362 ohm/cm. When current passes down a wire, the wire gets heated. The moving electrons collide with ion and cause them to vibrate thus increasing the temperature ths is a waste of energy-when a current flows, heat is transferred to the air surroundingggs which explains why computers get hot in operation. However we can make use of the heating effect e. g. in fuses which are designed to melt when too much current flows e. g. in kettles. We can calculate the heat transferred per second using the following formula: Power = (Current)2 x Resistance (Watts) = (Amps)2 x (Ohms) (W) = (A)2 x (? ) Length (cm) Current (Amps) Resistance in Ohms (R=V/I) Power (Watts) From the table above we see that there is a relationship between the resistance and the current. We see that from the results table that the power (in Watts) is equivalent to the current (in amps) squared multiplied by the resistance of the wire. From the graph showing Power Vs Length, we can work out the heat transferred in one centimetre of nichrome wire. Power i Length =Thermal energy transferred (J) Length (cm). Current (Amps) Power (Watts)Â   From these results we can work out the coulombs of charge in each separate length of nichrome. This result will then allow us to calculate how many electrons had passed through the wire, which further allows us to calculate the time taken for the experiment to take place.

A Comparison of Self-Acceptance in Beloved, Secrets and Lies, and Cuckoos Nest :: comparison compare contrast essays

Self-Acceptance in Beloved, Secrets and Lies, and the Cuckoo's Nest  Ã‚      â€Å"Self†-one of the words most commonly used, yet hardly ever defined. According to the Random House Dictionary of the English Language, the term self refers to a) a person’s nature, character, etc. in the sense of â€Å"his/her better self†, or b) a person or thing referred to with respect to complete individuality, e.g. one’s own self. To clarify the term self in regard to how an individual perceives himself/herself, I would like to make a distinction between the term â€Å"ego† and self.   Ã‚  Ã‚   Generally, ego is defined as â€Å"the part of the psychic apparatus that experiences the outside world and thus mediates between the primitive drives of the id and the demands of the social and physical environment† (1). I believe that the term ego has been slightly modified throughout the past few decades and now also functions as a synonym for self-importance. The ego is reflected within the capital spelling of the word I, referring to myself, as a separation from aspects of the human psyche that we do not include into our identification of ourselves. It is the ego that makes us feel connected to our name, to our families, and to our accomplishments in life, especially if they have provided us with social respect (and even disrespect, as I will explain later throughout my essay). In pressurizing situations, it is the ego that makes sure that we have the self-esteem to continue, confirming us that we are different from anybody else and that we have the individua l qualities and abilities to do anything we choose.   Ã‚  Ã‚   The self, on the other hand, is in my opinion what we really are, our nature/ character, not necessarily who we perceive ourselves to be. The self is based on a sense of understanding that every individual is on a journey; a lifelong experience. I believe that the self allows ourselves to feel compassion with ourselves no matter what we are going through in life, because we do not need to prove or accomplish something to be entitled to live. Connecting this with the definition given in the Random House Dictionary, stating that self describes a person’s nature, I believe that a strong sense of self is based on acceptance. This implies acceptance of ourselves at any given moment, and acceptance of the fact that all of our past experiences were necessary to bring us where we are right now.

Ramayana and the Illiad

Yogesh Tekwani Professor November 22, 2011 Second Writing Assignment Ramayana and the Iliad are two important literature pieces from Greece and India, both plays are set in time when Gods were known to make appearance on normal basis. The plays are main characters are Achilles and Ram, Achilles is a demi god and Ram is an incarnation of God Vishnu. In the Iliad, Achilles is an arrogant warrior who goes to war to claim glory and fame. In the Ramayana, Ram is a prince who is exiled to the forest. So what is the nature of injustice to the hero in these epics?What customs/values inform the heroes’ responses to this injustice? How do differences in customs/values inform differences in Greek and Hindu literature? What do arete and dharma mean in these cultures? What roles do the gods play in these heroes’ predicaments? The Iliad starts off with sacking of a Trojan’s allied town and two maidens are taken as prized possession from the town, one for Achilles and one for A gamemnon. During a plague, Agamemnon is asked to return his prize and in anger asks Achilles to give him his prize.In anger Achilles draws sword toward Agamemnon’s men and is about to slay when Athena appears to control his anger. Achilles stops fighting for Agamemnon and tells his mother to ask Zeus for revenge on Agamemnon’s army. The Ramayana starts off with Ram, who was the prince of Ayodhya was on his way to get crowned to become a king. Ram who is known for his kind nature is asked by his mother in law to go the forest and live there for 14 years because she wanted her own son to be crowned king. Ram without hesitation accepts the decision and heads to the forest with his wife and his brother.In these two epics we can compare the customs/values that each individual have learned and how they use those customs/values towards their injustice. In the Iliad, when Achilles is told to give up his price, he angrily points his sword at Agamemnon and is ready to kill anyon e who touches his prize. Achilles’s is shown as a self-centered arrogant warrior who cannot accept authority and must use his sword to prove his point. Achilles reactions on this situation is based on his understanding that he a demi god who can easily kill many men and that e only went to war to claim glory. Achilles response though is shown normal in Greek tradition because if injustice is done to anyone, they can easily kill the person to regain justice. In the Ramayana, Ram who is shown as a noble prince who was brought up loving his parents and brothers, he is taught to always respect his elders and never question authority. Ram is told to exile in the forest for 14 years by his step mother; Ram does not question the injustice and accepts his fate. Ram is shown as the purest of men and one who respects his elders does not question authority.Ram is shown as person who lives life without jealousy and glory is not a part of it. When comparing Achilles and Ram, Achilles is s hown as a person who questions authority and does not respect his elders whereas Ram is a person who accepts authority and respects his elders. So how do these the differences in custom/values inform differences in Greek and Hindu Culture? The Hindu culture is more about purity and how a person gains that trait. In Hinduism a person must try to live life with no greed, selfishness and arrogance.A person must completely put all of their faith in the hands of God, as they are trying to gain wisdom and purity for their soles. The Gods play a big part in Hindu cultures because it is through worshipping them that you can be pure, the life that you live now is nothing but an illusion and true life can only be gained by living this illusion as pure as you can. The Greek culture is a little similar to Hindu culture when it comes to looking at the Gods for answers and help but, those are the only similarity between the two.The Greek culture is not based on an illusion and does not mention pu rity of souls to claim a higher standard in life. Greek culture is shown as more of a violent culture where the Gods themselves partake in these actions. The Greek culture also has more involvement from gods when it comes to living a daily life. The customs/values for the Greek culture were based on pride, glory and power because that how the gods motivated the people. In Hindu culture, purity is the only gain and is motivated through a better after life. Dharma also plays a big part in Hindu culture, as it is through dharma a person can become pure.Dharma’s true meaning is personal duties, when a person is born they are given dharma that they must follow to achieve next life. It is never told what your dharma is but it is claimed that you can achieve through doing the right things in life and once you achieve it you will realize it yourself. It can be more than personal duties too, it can also be your calling in life or what you are meant to do even are after you complete yo ur personal duties in life. Through dharma can you only achieve personal satisfaction or even enlightenment that even glory cannot provide.In the Greek Culture, arete is a little similar to dharma because it is also what a person is trying to achieve in their lifetime. Arete is more of excellence of sort that a person is trying to gain through self-improvement. Arete can be excellence in anything a person desires, it is not a self-duty or a calling like dharma. In the Ancient Greek though arete was more of inner strength and courage that one would try to gain in a battle. For example, Hector’s achieved arete when he battled to protected his homeland, his actions were based on his duty to protect his homeland. What roles do gods play in these heroes’ predicament?In the Iliad the gods are more involved and favor sides, Achilles who was a demi god has a god for a mother and she had already told him his fate. During the battle for troy when Achilles was going to slay Agame mnon, Achilles is visited by Athena to check his anger because that can alter the fate of the battle. In the Ramayana, gods never visited Ram when it came to him making a decision, it is only when he going to destroy heave that they visit him. The fate of Ram and Achilles is also predetermined in these epics, Achilles was meant to go to Troy and gain glory through its defeat.Ram’s fate was a little different though because in the Ramayana, Ram himself is an incarnation of Vishnu and he was born to kill Ravana. Both the warriors are gods in these epics but Ram in the Ramayana does not know that he is one. In both the Iliad and the Ramayana, there are injustice done to the heroes of the epic and it is through this injustice it is that these heroes gain glory and happiness. In the Ramayana, Ram is prince who is banished to the forest for 14 years and it is through this injustice that he recognizes his fate and kills Ravana.Ram is shown as a pure man in this epic and not an arrog ant warrior who questions authority and disrespects his elder, Ram’s response to his injustice is not extreme and his acceptance of his fate his is not based on him wanting glory. In the Iliad, Achilles is shown as an arrogant warrior who detests authority and his reaction to his injustice is shown as him drawing his sword towards Agamemnon. The meaning of dharma and arete is also different in these two cultures, dharma is a sort of purity a person is trying to achieve through self-responsibility and purity whereas arete is an excellence a person is trying to achieve abilities.The Gods in these epics play a major part because they are the controlling forces and their choices can alter the ending of each of these epics, in the Iliad if Achilles would have killed Agamemnon and not been stopped by Athena than the epic would have ended differently. In the Ramayana if Ram had questioned the authority for his injustice than the epic would be different. In the Ramayana virtue is sho wn through Ram’s eyes as being as pure as he can be and a happy life can be lived with nothingness. In the Iliad, virtue is shown through Achilles’s eyes gaining glory in the most toughest of wars and life without glory is incomplete.

The Social Problem Of Children - 1632 Words

The Social Problem Young children experience mental health challenges that impact early learning, social interactions, and the overall well being of their families. It is estimated that between 9% and 14% of children from birth to 5 years of age experience social and emotional problems. These problems negatively impact and affect their functioning and development (Brauner, 2006). Children diagnosed with mental and behavioral health disorders are receiving too few therapeutic services. Therefore these Children are not getting the therapy they need in order to gain the skills that can help them be more successful in school, community settings, and family/home life. Children diagnosed with Mental and behavioral disorders left untreated will be negatively impacted in the future. These children may have difficulty in school, sports, and community settings. This in turn can create hardships for parents with their jobs, friends and family. Parents may lose their jobs because their Children are being repeatedly kicked out of schools. In social settings the parents of these Children are often isolated and stigmatized because of the child’s behavior. Families are often torn apart, because these children are exhausting and need extremely high levels of care. Family members don’t take the time to learn about their diagnosis or understand the child’s needs. Children with mental and behavioral disorders are more likely to end up in the juvenile justice system. Furthermore, Children whoShow MoreRelatedThe Social Problems Of Children1652 Words   |  7 Pagesspending influence of children up to twelve years in the United States. These children controlled spending of $28 billion in 2000 from their own allowances and earnings, and also they influenced $250 billion of family spending. (Oates, Blades and Gunter, 2003, pg.401). 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These decisions or self-regulated questions may be as simple as deciding to lay in bed a few extras minutes, getting up and showering, or not getting out of bed at all. Anytime a person is faced with a dilemma, they are using problem solving skills. Society’s demands on people create goal orientedRead MoreThe Importance Of Early Childhood Friendship1267 Words   |  6 Pagessomething that is frequently overlooked as a positive developmental influence. Preschool friendships are helpful in developing social and emotional skills, increasing a sense of belonging and decreasing stress. People who feel lonely or socially isolated tend to be more depressed and have more health issues. Both boys and girls form strong attachments to others need social and emotional support. It is human nature to attach to certain people and to want c loseness and support from others, regardlessRead MoreThe Importance Of Early Childhood Friendships1602 Words   |  7 Pagesfriendships are helpful in initiating the process in forming social and emotional skills. It increases a sense of belonging and decreases tension. People who feel as if they are an outcast or unsocial tend to be depressed throughout their lifespan. It is natural to attach to a variety of people and want friendship and support from others, regardless of who they are. People thrive socially in many different ways. There are various ways to help children develop relationship skills that will acquire connectionsRead MoreHow Teachers Can Facilitate Problem Solving Development862 Words   |  4 Pagesprovide children with opportunities to learn, practice, and develop their communicative, interactive, and social skills. At ages 2-4, children are still developing in all of these domains, therefore their problem solving skills are not yet efficient. For example, toddl ers have limited awareness of another’s point of view, therefore limiting their social problem solving abilities. Toddlers also lack the language skills needed to communicate in social situations, further limiting those problem solving