Topics in Physical Science
Topics in Physical Science PSCI 1030
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Popular in Physical Science
This 2 page Class Notes was uploaded by Cortez O'Hara on Wednesday September 23, 2015. The Class Notes belongs to PSCI 1030 at Middle Tennessee State University taught by Gerard Nyssen in Fall. Since its upload, it has received 54 views. For similar materials see /class/213112/psci-1030-middle-tennessee-state-university in Physical Science at Middle Tennessee State University.
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Date Created: 09/23/15
H N U P U1 0 00 k0 Study Guide 3 Is it at all possible for a hydrogen nucleus to emit an alpha particle NoI because it does not contain enough nucleons ln bombarding atomic nuclei with proton quotbulletsquot the protons must be accelerated to high energies to make contact with the target nuclei because the target nuclei are positively charged Why would you expect alpha particles to be less able to penetrate materials than beta particles of the same kinetic energy Two of these What evidence supports the contention that the strong nuclear force is stronger than the electrical interaction at short internuclear distances Protons can exist sideby side within an atomic nucleus How is it possible for an element to decay quotforward in the periodic table that is to decay to an element of higher atomic number As a beta particle is released a neutron transforms into a proton The isotope cesium137 which has a halflife of 30 years is a product of nuclear power plants How long will it take for this isotope to decay to about half its original amount 30 years Why after a uranium fuel rod reaches the end of its fuel cycle typically three years does most of its energy come from the fissioning plutonium Because fissionable Pu239 is formed as the U238 absorbs neutrons from the fissioning U235 Uranium235 releases an average of 25 neutrons per fission while plutonium239 releases an average of 27 neutrons per fission Which of these elements might you therefore expect to have the smaller critical mass Plutonium239 lf uranium were to split into 90 pieces of equal size instead of 2 would more energy or less energy be released Less energy would be released because of more mass per nucleon 10 To predict the approximate energy release of either a fission or a fusion reaction explain how a physicist uses a table of nuclear masses and the equation E mcz Find the change in mass and multiply by the speed of Light squared H Chemistry is the study of matter and the transformations of matter Imagine that you can see individual molecules You watch a small collection N of molecules that are moving around slowly while vibrating and bumping against each other The slowermoving molecules then start to line up but as they do so their vibrations increase Soon all the molecules are aligned and vibrating about fixed positions What is happening The sample is being cooled and the material is freezing The phase in which atoms and molecules no longer move is none of these U
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