Friday, January 24, 2020

Which two metals combined together give the higher voltage when reacting with acid :: GCSE Chemistry Coursework Investigation

Which two metals combined together give the higher voltage when reacting with acid Introduction In this investigation we will find out which two metals combined together give the higher voltage when reacting with acid. The metals used will be:  · Aluminium  · Zinc  · Iron  · Tin  · Lead  · Nickel  · Copper To make a prediction on what metals will be the ones that give the highest voltage when combined together you need to find out if the position in which the metals are at in the reactivity series would make a difference, and if it does, how? You also need to find out how the metals react with acids. We know that the higher the metal is in the reactivity series, the stronger it will react with an acid. Theory Batteries have chemicals inside to store energy. When two different metals that are connected by a wire are placed into an acid, a potential difference (voltage) is produced. This occurs because the metals react with the acid forming Hydrogen acid, a metal salt solution and an electric charge. The charge flows from the most reactive metal to the least reactive metal. Equipment The equipment used will be:  · Acids  · Metals  · Wires  · Voltmeters  · Beakers  · Measuring cylinders  · Stop watches  · Sandpaper Method Collect all the equipment and place it as it is shown on the diagram above. Choose around 10 pairs of metals and place one pair in the beaker, and connect them both with a wire. Put them in for a few seconds, and voltage will be produced when the two metals react with the acid forming hydrogen, a metal salt solution and an electric charge. This charge will flow from the least reactive metal to the most reactive metal. Measure the voltage with the voltmeter and write it down. Do this for every pair of metal you have chosen, and then find out which ones are the most reactive and which ones are the least. Prediction I predict that the highest metal in the reactivity series and the lowest metal in the reactivity series from the metals we are using will produce the highest voltage. I think this because voltage is also called potential difference, so this shows that there is more power when the difference between the metals is larger. This means that the voltage in the metal which is lower in the reactivity series must have a higher voltage to the metal that is most reactive to make my prediction correct. I think that the highest the difference = the higher the voltage. I also predict that changing the acid will change the ending result. I think that the stronger the acid, the higher the voltage.

Thursday, January 16, 2020

Eleven Seconds: Autobiography of Travis Roy †Book Report Essay

Travis Roy, a former collegiate hockey player, wrote his tragic story in a book called Eleven Seconds. Well, he didn’t physically write it down himself; he dictated the story to E.M. Swift, who organized Travis’ words into the book. This is because Travis Roy is a quadriplegic. After a mere eleven seconds of Travis’ first college hockey game, his dreams of the NHL were shattered forever. Travis Roy’s autobiography, Eleven Seconds, has three parts. In the first part, Travis tells about his childhood and his high school career. He reminisces about the fun he had playing little league hockey and how he would help out at the rinks that his father managed. The next part in the story is the climax. Travis describes his feelings and emotions leading up to game-time of his first college hockey game. He is extremely excited to be playing the sport he loves at such a high level of competition, but within eleven seconds, everything is stripped away from Travis. He tries to check an opponent into the boards, but misses and hits the glass awkwardly. At this point it is all over. Travis Roy is paralyzed from the neck down: a quadriplegic. For the remainder of the story, Travis describes the motionless life that has been forced upon him. He tells about the pain of never being able to play hockey, or even live a normal life again. Travis explains the emotional battle his whole family was forced into and also states his case for stem cell research. Eleven Seconds is a very well written book in my opinion. It is easy to read and has a friendly tone. I’m happy to have read the book because it made me realized that I should appreciate the little things in life that I take for granted every day. What if I woke up one day and couldn’t move my arms or my legs? That is the way Travis Roy will wake up every day for the rest of his life. I wonder if I would be able to cope with a situation like Travis’. I don’t think I would be mentally and emotionally strong enough. The book, Eleven Seconds, made me look at life from a different perspective. I didn’t feel like I was reading about just some random guy who had an unfortunate incident, but a person that is similar to me in many ways. Travis had hopes and dreams just like I do. Therefore, I was able to relate to Travis’ burning desire to follow through with his passion and it really saddened me  to read about the way he became a quadriplegic, doi ng the very thing that he loved. I would recommend Eleven Seconds to anyone who thinks their problems are too big to handle. The book is a good reminder that we should be thankful for everything we are able to do in our lives. Any time we have a meal, take a shower, brush our teeth, or get dressed, we are doing more than Travis can do on his own. I think the story is also a great motivator to live every day to the fullest. People who like hockey would probably be interested in Travis’ story as well. Travis Roy comes off as a warm and loving person, despite his terrible injury, so his book Eleven Seconds should be easy for most anyone to read. The only hard part might be keeping one’s tears off of the pages.

Wednesday, January 8, 2020

Is the Death Penalty Applied Fairly - 1852 Words

Is Death Penalty Applied Fairly The death penalty has been a controversy in the United States justice system since its commencement (Bakken Morris, 2010). Although extremely controversial, it has stood the test of time as the definitive penalty. Numerous countries are at present bring an end their death penalty law. Contrary to that, the United States has thirty eight out of its fifty states with death penalty still operational. It seems the United States needs the death penalty more than ever before due to rising rate of sever violent crimes across the nation. Statistics shows that since the early nineties roughly around 355 people have been put to death through death penalty and approximately 3300 are still waiting on death row. Similarly since 1976 around 552 felons have been put to rest through death penalty across the United States (Bakken Morris, 2010). If you break these deaths down according to the methods utilized about three hundred ninety-four by lethal injection, one hundred forty-one by electrocutio n, eleven by gas chamber, three by hanging, and two by firing squad. Almost half of the 1976 executions have taken place within the last five years, which includes 52 that took place this year. Even though the death penalty has brought countless gooey criminals to end, the course of death penalty that it is founded on is inconsistent one. The system of scrambled appeals, court orders, and final minute pardons has left the whole system unproductive. AsShow MoreRelatedIs the Death Penalty Applied Fairly?1215 Words   |  5 PagesRunning head: The Death Penalty Is the death penalty just and applied fairly? 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