Radioactive decay

1. What are the eras of the Phanerozoic? Name one important evolutionary event in each of those eras. Paleozoic The big incident of this era is the Cambrian explosion that happened 540 million years ago. Mesozoic Angiosperms were diversified during this era Cenozoic Mammals increase in size 2. Define/explain the following terms: Ediacaran, diagenesis,…

Introduction: With the constant rise for global energy, there is a huge demand for environmentally clean and cheap energy sources. Now, for many years power generated by nuclear power plants has been a reliable source for energy but the current amount of uranium, which is the fuel will satisfy the energy requirements for the next 200 years. Also, the nuclear reactors are not very efficient as not all of the uranium mined is being used to generate power. In this essay, I will discuss an alternate…

tensor parameters, has different values in different directions. In SI units, thermal conductivity has the unit of watts per meter Kelvin (W/ (m*K)). Each HLW (or spent fuel) disposal canister produces around 1000 to 2000 watts of heat during the decay processes. In order to reduce the heat related mineral…

1. Outline Alfred Wegener’s hypothesis of Continental Drift Alfred Wegener believed all Earth’s continents were once joined together but gradually moved apart for millions of years by cracking and dividing due to slow currents of magna beneath it. 2. Cut out the attached Gondwana Jigsaw along the dotted lines. Fit the continents together and glue them in position. Hint, refer to other sheets for map. 3. Describe the evidence for Continental drift. All the continents fit together much like…

useful heat and energy. Soon after the discovery in the early 20th century that radioactive elements released an immense amount of energy the pursuit to harness nuclear energy began. Ways of harnessing this energy at the time were, however, impractical due to the short half-lives. This changed in the late 1930s with the discovery of nuclear fission, a process that entails either a nuclear reaction or radioactive decay in which the nucleus of a particle is split into smaller parts. The Atomic Age…

Moles 1.How is molar mass calculated and why is it useful? Molar mass is calculated by going to the periodic table finding each mass of each element in the compound then adding them all up based on how many of those elements are in the compound. 2.Define a mole in chemistry and give 3 examples equivalent units that are used in chemical calculations. Mole is considered the unit for amount in chemistry other units that are equivalent are atoms, formula units, and molecules. Gas Laws 3.How is the…

The presentation, aptly named Manya after Marie Curie Sklodowska’s childhood nickname, was an impressive story telling of the life up to the beginnings of World War I of the Nobel Prize winning Chemist and Physicist Marie Curie Sklodowska. The presentation itself took place in Boettcher lecture hall 102 but was dressed up nicely to match important periods in the life of Marie Curie. The set consisted of a small table which held several notebooks and correspondence that were of import to Curie,…

Marine Pollution: Causes There are many observable attributes in which we can classify the various types of marine pollution. Marine Pollution is a major setback and not only hampers the marine species but also is passed on to the land animals as well. Sea water covers around 2/3rd of the planet, which plays an important role in maintaining the essential biological and ecological balance. There has been increasing amount and the various kinds of waste products which originates from expanding…

Personal Narrative Can you spontaneously explode from a cut? Was the question when I was at Granite State Gymnastics, the place where I train 8 months of the year for a 4 month competition season. The gym has a small airlock style walk in with wooden boards as a floor. Once inside, the space is about 4 feet wider than the door frame and has a nicer stripped wooden floor that is light brown and a L stairs to your left when you walk in with a bathroom in front of you and a school flyer style…

Along the lines of rate laws come half-lives. Such a common topic that comes to mind with half-lives is the decay of radioactive elements, or the time it takes for a certain sample of an element to reach half of its original size. For example, during the Chernobyl power plant incident in 1986, one of the most dangerous elements to begin its decay was Cesium-137 which has a half-life of 30 years. Therefore, people can’t move back to the area because of the deadly amounts of Cesium-137 still…