Lead is a lustrous, silvery metal that tarnishes in the presence of air and becomes a dull bluish gray. Soft and flexible, it has a low melting point (327 °C). Its chemical symbol, Pb, is from plumbum, the Latin word for waterworks, because of lead's extensive use in ancient water pipes. Itsatomic number is 82; its atomic weight is 207.19.
Lead and lead compounds can be highly toxic when eaten or inhaled. Although lead is absorbed very slowly into the body, its rate of excretion is even slower. Thus, with constant exposure, lead accumulates gradually in the body. It is absorbed by the red blood cells and circulated through the body where it becomes concentrated in the soft tissues, especially the liver and kidneys. Lead can cause damage in the central nervous system and apparently can damage the cells making up the blood-brain barrier that protects the brain from many harmful chemicals.
Symptoms of lead poisoning include loss of appetite, weakness, anemia, vomiting, and convulsions, sometimes leading to permanent brain damage or death.
Children who ingest chips of old, lead-containing paint or are exposed to dust from the deterioration of such paint may exhibit symptoms. Levels of environmental lead considered nontoxic may also be involved in increased hypertension in a significant number of persons, according to studies released in the mid-1980s. As a result, the U.S. Centers for Disease Control in recent years have been revising downward the levels of environmental lead that it would consider safe. At one time, lead poisoning was common among those who worked with lead, but such workplace hazards have been largely curtailed.
Lead has been used by humans since ancient times.
It was used in ancient Egypt in coins, weights, ornaments, utensils, ceramic glazes, and solder. Lead is mentioned in the Old Testament. The
Romans
conveyed drinking water in lead pipes, some of which are still in operation.
Roman slaves extracted and prepared the lead, describes a disease among the slaves that was clearly lead poisoning. Because of their potential toxicity, lead water pipes are no longer being installed. The greatest single use of lead metal today is in the plates of storage batteries for automobiles. The protective oxidation layer formed by lead in contact with such substances as air, sulfuric acid, and fluorine makes it highly resistant to corrosion. For this reason, lead has been used to make drainage pipes and lead chambers in sulfuric acid factories. It is also used as a roofing material. The softness and malleability of lead make it useful for sheathing telephone and television cables. Lead is used in solder because of its low melting point. When combined with tin, lead forms solder
In World War II the soldiers used a jelly-like substance, called “red vet pet” to prevent themselves from the sun. Finally, Benjamin Green combined this substance with cocoa butter and coconut oil, which created the new line of Coppertone suntan cream. Coppertone has come a long way, to make their product better. As they changed the product, the advertisement changed over the years to appeal to the audience. Although both of these advertisements are being presented to get people to buy Coppertone, the modern day advertising is more appealing than 1944 advertisement; the modern day advertisement has a better focal point, action, general feeling and mood, selection of elements, and audience.
This is why the Flint water crisis is so critical today. Because young children are being exposed to lead and they should actually be screened from the lead. The pipelines with lead in the water system and the whole community of Flint, not being able to drink water out of the facet as well as not being able to
 The purpose of this paper is to identify and contrast the different styles of leadership exhibited by two characters found in the 1949 movie Twelve O’Clock High starring Gregory Peck as General Savage, Army Air Forces general. Based on a true story, Twelve O’Clock High is a inspirational account of the highly dangerous precision daylight bombing missions carried out by US Army Air Force’s 918th Bomber Group in England during the last part of World War II. In the beginning of the movie the squadron is commanded by general Davenport. It is very clear that General Davenport’s main concern is the wellbeing of his men. He obviously had developed close interpersonal relationships. The men of the squadron were completely devoted towards Davenport and they trusted any decision that he would make. General Davenport’s affection for his men comes to interfere with his ability to lead them. The squadron suffers heavy losses to planes and heavier losses to soldiers. One instance that clearly demonstrates Davenport’s incapability to uphold his responsibilities as the leader is when he jeopardizes the well being of the entire squadron by ignoring protocol and flying out of formation in the attempt to save one plane. When it becomes apparent to Davenport’s superiors that his emotional feelings have become an obstacle to his effectively leading the squadron they relieve him. General Savage who is ordered to take over the underachieving bomber group experiencing heavy losses because of poor technique and lack of focus. Savage takes a kind of tough love approach, holding his men to the highest standards. Savage makes the point that the ultimate objection of the squadron is to successfully complete the assigned missions. Throughout the movie Savage constantly makes it absolutely clear to the squadron that no one individual’s wellbeing will be placed ahead of the entire team and the success of the team. Initially the changing of the preceding General dispirits the squadron. They felt that General Savage was uncompassionate considering the men as nothing more then numbers that were dispensable at his convenience. After several missions that were marked by a remarkable turnaround in success the man eventually come...
lead are more prone to developing ADHD. Some scientists in Brittan have linked a higher
My hypothesis that ducks have feelings is based off my own observations while using texts from other sources to support it. I used the article “Yes, Animals Have Feelings” which discusses how animals do have feelings to support my hypothesis. Balcombe states, “Their desire for rewards is part of sentience — the capacity to feel” (Balcombe). While observing the ducks I wrote down their behaviors and linked them with an emotion. Some of the emotions I saw in the ducks were happiness, trust, and caring. One of the observations I made was when many of the ducks were in the pond. The ducks would chase each other around in the pond as if they were playing. Before they began chasing each other I watched to see if there was a reason behind it such as taking food away from the other duck or irritating the duck in anyway. I did not notice any type of
The purpose of this academic piece is to critically discuss The Darwinist implication of the evolutionary psychological conception of human nature. Charles Darwin’s “natural selection” will be the main factor discussed as the theory of evolution was developed by him. Evolutionary psychology is the approach on human nature on the basis that human behavior is derived from biological factors and there are psychologists who claim that human behavior is not something one is born with but rather it is learned. According to Downes, S. M. (2010 fall edition) “Evolutionary psychology is one of the many biologically informed approaches to the study of human behavior”. This goes further to implicate that evolutionary psychology is virtually based on the claims of the human being a machine that can be programmed to do certain things and because it can be programmed it has systems in the body that allow such to happen for instance the nervous system which is the connection of the spinal cord and the brain and assists in voluntary and involuntary motor movements.
They can feel and sense things just like people even though they do not react to things in the same way. There are many ways to tell that animals have feelings. A way to tell they have feelings is by looking at their faces and bodies. Their body language tells a lot about their feelings. If the animal walks around droopy then maybe he or she is sad. The most important thing to look at to tell that a animal has feelings is to look at their eyes. By looking at the outside of the animal you can tell what’s going on the inside of them.
It has an atomic mass of 207.2, It has 82 protons and 126 neutrons. Lead has 82 Electrons and 4 valence electrons, with isotopes of 13. The conductivity is infinite or it’s equivalently is resistivity is zero. The melting point is 327.462 degrees Celsius (621.432 degrees Fahrenheit) The boiling point is 1749 degrees Celsius ( 3180 degrees Fahrenheit). This element is easily worked meaning that it can be made into many different things like roofing, architecture, and stained glass windows.Lead is a highly toxic metal, found in the Earth's crust. Lead is soft, ductile, dense, and a highly malleable metal with a dull silvery-grey color. Leads electrical conductivity is 4,7 and it has an electrical resistivity of 21,3. It is very resistant to corrosion. Lead isotopes are the end products of naturally occurring radioactive elements. Lead is the worst conductor of
Horney’s theory of humanity is deterministic while the individual has the right to choose (free choice) to some extent (F>D). Similarly to Fromm, Horney’s theory is both optimistic and pessimistic with a tendency toward the curative powers of human (O>P). Additionally, her theory is both causal and teleological (C=T), where she believed it is directly influence by one another. Horney believed in the strength and influence of the conscious, social motivation over the unconscious, which is slightly different to Fromm’s theory (C>UC). Horney has a similar theory with Fromm where she emphasis on the social nature of humans as well as cultural influences places her theory as more social than biological (S>B). Finally, she places emphasis on the similarities between people rather than on their uniqueness (S>U) (Psychology, 2016).
Some of these mythical creatures appeared in the myth of Hercules and his labors. There are creatures that helped like chiron he was a teacher and he was higher class centaur than the others. Then other ones were bad like echidna and they say she was the most dangerous and most fearsome monster of all and attacked and ate families. Some of the beasts are dead but some are still alive and so many people believe that these mythical beasts were still out there. So people still honor the people that were thought to be the slayers of the harmful beasts and to the heros that were thought to help in the slaying of the evil. Many people still believe that these mythical creatures are
These voluntary actions are then used to express empathy because they are able to put themselves in the position of the other dog, thus they are willing to do “voluntary acts”. For instance, in “Task Differences and Prosociality; Investigating Pet Dogs’ Prosocial Preferences in a Token Choice Paradigm,” dogs in pair of twos were situated in a lab and one dog had the choice to press a button or pull a lever that would present their partner food. If the dog knew its partner, then the dog was more likely to be prosocial and generous and allow the other dog to eat. (Dale et al.). Thus showing empathy through being prosocial by actively aiding another dog in which this canine knew well. Consequently, both dogs would benefit as the first one feels validation because of its good deed, while the other is satisfied due to the fact that its basic needs are being met. However, as later seen in Dale et al.’s study, as much as a dog can be generous, it can also be apathetic and even cruel if it does not know the dog well enough. Later on in the study, the dogs were instead paired with a partner they did not know, and in those circumstances, the dogs were ten times more likely to not enable their partners to eat. That might be due to not pressing a mere switch or pulling a lever (Dale et al.). This shows that dogs can be apathetic and even antisocial by ignoring or not even noticing the signs being demonstrated by their partners. This further shows how dogs can convey empathy, because it illustrates these mammals’ ability to choose whether or not to internalize the other mammal’s situation and act upon it. Which shows that dogs possess a higher level of understanding in the ways in which these mammals can express and give empathy. In closing, while dogs can express empathy
Greek mythology is a body of myths and teachings that belong to the ancient Greeks concerning Titans, gods, and heroes. According to Alan Dundes, a myth is a sacred narrative explaining how the world and humankind assumed their present form (Dundes 1). Though now it may be referred to as mythology, to the ancient Greeks it was an aspect of their religion. Like many other pre-Christian societies, the ancient Greeks deemed things that were important in their lives, such as fire, water, air, and lightning to be gods which govern the world. The gods of the ancient Greeks had a complicated genealogy with many generations of gods and goddesses. The tales of these gods were woven into an immense variety of fables. The fables of the Greek gods were handed down through word of mouth, from one generation to another, long before written logs were used (History). The fables that were passed down show that the Greeks used the tales to give answers to the questions, such as where do we come from? How did we get here? Why are we here? Questions like these are human nature and the basis of all religions.
In society today there has been a lot of talk about animal intelligence and how they and we interact with them. Many pet owners believe that their pet is intelligent and compassionate, but some people and scientist don’t believe it's true. Well, I believe animals are intelligent and compassionate, but don’t have a sense of awareness of their actions.
Throughout our lives we have all felt happy, sad, lonely or even lost. These are what we would describe as emotions or feelings. But have you ever thought if animals feel the same as humans? Our textbook defines emotion as; psychological changes and conscious feelings of pleasantness or unpleasantness, aroused by external and internal stimuli, that lead to reaction (Davis & Palladino, 2013). Charles Darwin was among the first scientists to come up with the idea that animals have emotions. I will discuss some facts that help to prove the emotional characteristics of animals. This of course is just my opinion and others may think differently.