1. Who are the authors? (Where are they doing their research? What kinds of research are they known for? What other things have they done?) Adam Hadhazy is a freelance science writer based in New Jersey. He is known for his research and reports on astronomy‚ biology and psychology; he has written other works such as‚ “Where Does the Period Table End?” which was published in discover magazine and‚ “The Reality of ‘Silicon Valley’” which was published in popular science. (Hadhazy) 2. What is the main
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and named after the Greek God Prometheus. It is not naturally occurring‚ but can survive outside of a lab. Promethium has an atomic number of 61‚ which is the number of protons. Its atomic mass‚ protons+neutrons‚ is 145u. It is an isotope. This means that it has a different number of neutrons (84) than the number of electrons and protons (61). Every element changes states of matter at different temperatures. Promethium melts at 1042.0°C (1315 Kelvin)‚ boils at 3000.0°C (3273 Kelvin)‚ and freezes
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in night vision gun sights‚ was his best solution‚ and as he let the gun fire periodically for several days‚ his Geiger counter indicated that radioactive emissions were indeed growing‚ indicating that the Thorium- 232 were successfully accepting neutrons to turn into Uranium-233. Therefore‚ he was successful in his project to create a nuclear reactor. But‚ the first major problem that he ran into after his success was that he did not have a way to neither turn on nor turn off the reactor. He then
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Question 1 | | | | Correct. | | | Movements and interactions in the lithosphere and the internal Earth processes that drive them are referred to as the _____ cycle. | hydrologic | | metamorphic | | tectonic | | rock | Question 2 | | | | Correct. | | | The model that describes the movement of water through the reservoirs of the Earth System is called the _____ cycle. | rock | | hydrologic | | metamorphic | | tectonic | Question
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Making Water Turbines Most Energy Efficient How does a wind turbine’s output vary with wind pressure (height of water)‚ the flow rate‚ size of the motor‚ and type of blade? Introduction There are many types of energy used today: Fossil fuels‚ coal‚ nuclear energy‚ solar energy‚ geothermal energy‚ hydrogen energy‚ hydroelectric energy‚ wind energy‚ and biofuels and biomass. Non-renewable energy sources such as fossil fuels and coal are diminishing since it cannot be recycled‚ unlike wind energy
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Elements above iron are formed by neutron capture in the extreme conditions of a supernova. 5) Explain how the age of a globular cluster can be determined from its zero-age main sequence plot for an H-R diagram Globular clusters form a close by group of stars that are usually born at the
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Israel Science and Technology Homepage Home Search About Contact Bookmark Sort List By Atomic Number Atomic Weight Name Symbol Periodic group‚ Electron configuration Melting point Boiling point Density Ionization energy Abundance in Earth Year of discovery Hebrew Name List of Periodic Table Elements Sorted by Atomic Number Click a column title‚ such as Symbol‚ to sort the table by that item. No. Atomic Weight Name Sym. M.P. ( °C ) B.P. ( °C ) Density* (g/cm3) Earth crust (%)* Discovery
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Name: Date: Final Section-1 Type the letter that represents the best answer to each of the multiple choice questions. Answer all questions in this section. Each question is worth 1 point. This section is worth 40 points. [1] In the scientific method‚ a hypothesis is _____. A ) is a statement of fact B ) makes a prediction that can be tested C ) is usually proven to be correct D ) can only be tested once E ) all of these [2] Which of the following can be considered a definition
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Throughout many scientific advances in the centuries of science‚ most citizens often forget the contributors of these discoveries and advancements in modern-day technology. One of the many contributors that are responsible for changing our world through science is James Chadwick. James Chadwick was born on October 20th‚ 1891 and started his journey in the science world in 1908‚ Experiments done in Europe by Frederic and Irene Joliot Curie had caught his attention‚ leading him toward the study of
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atomic mass for the element Beanium with three isotopes. The average atomic mass is the average mass of the atoms of the element divided by the total number of atoms. An isotope is an atom with the same number of protons‚ but different number of neutrons; they are different forms of a single element. Since we knew the isotopes had almost the same amount of sub-atomic particles‚ we made our hypothesis the following: If the sub-atomic particles are almost exact in amount the total mass‚ average mass
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