Thermal Physics :: essays research papers

Thermal Physics 340Exam 1Due Monday, February 18th, at the cacography of classAs discussed in class, submission of your solutions to this exam will demonstrate that you claim not communicated with others concerning this exam. You may use reference texts and other information at your disposal. Do all problems separately on clean white trite 8.5 X 11 photocopier paper (no notebook paper or scratch paper). save on only whizz side of the paper (I dont do double sided). Staple the entire solution raft in the amphetamine left hand corner (no binders or clips). Dont rise in pages where you have scratched out or erased excessively, re-write the pages cleanly and neatly. All problems are every bit weighted. Assume we are working with normal wrings and temperatures with ideal gases unless noted otherwise. own sure you list all assumptions that you use (symmetry, isotropy, binomial expansion, etc.). 1. A container has one besiege which contains many small holes, and outside the con tainer is vacuum. If the container is filled with He at pressure Po, it is found that after one hour the pressure inside the container is Po/2. The container is at a time filled with an equal number of He and Ne atoms to a heart and soul pressure of Po. (a). Calculate the ratio of the number of Ne to He atoms left in the container after one hour. (b). Would this problem be more difficult if the atoms were initially C and H? Explain from two standpoints, the realistic standpoint and the physics-land standpoint. The latter interpretation should invoke the assumptions made in the ideal gas model, the former something you go to bed about chemistry. (c). Explain why such a container might be multipurpose in the case of isotopes, especially a series of such containers set up so that what comes out of the first goes into the second and so on. 2. A He and H atom collide elastically in a head-on collision. (a). If they have the same kinetic energy (KE) to begin with, which one gains KE? Answer this by calculate the amount gained and lost for both, relative to their initial value. (b). Suppose the atoms had the same big bucks but different kinetic energies? Do not do a precise calculation here, but instead make a physical lean as to why the slower thus cooler atoms would slow down the faster, hotter atoms. This is one process for the moderation of hot neutrons in a nuclear nuclear fission reactor by the water used as its coolant.Thermal Physics essays look for papers Thermal Physics 340Exam 1Due Monday, February 18th, at the start of classAs discussed in class, submission of your solutions to this exam will indicate that you have not communicated with others concerning this exam. You may use reference texts and other information at your disposal. Do all problems separately on clean white standard 8.5 X 11 photocopier paper (no notebook paper or scratch paper). Write on only one side of the paper (I dont do double sided). Staple the entire solution set in t he upper left hand corner (no binders or clips). Dont turn in pages where you have scratched out or erased excessively, re-write the pages cleanly and neatly. All problems are equally weighted. Assume we are working with normal pressures and temperatures with ideal gases unless noted otherwise. Make sure you list all assumptions that you use (symmetry, isotropy, binomial expansion, etc.). 1. A container has one wall which contains many small holes, and outside the container is vacuum. If the container is filled with He at pressure Po, it is found that after one hour the pressure inside the container is Po/2. The container is now filled with an equal number of He and Ne atoms to a total pressure of Po. (a). Calculate the ratio of the number of Ne to He atoms left in the container after one hour. (b). Would this problem be more difficult if the atoms were initially C and H? Explain from two standpoints, the realistic standpoint and the physics-land standpoint. The latter explanation s hould invoke the assumptions made in the ideal gas model, the former something you know about chemistry. (c). Explain why such a container might be useful in the case of isotopes, especially a series of such containers set up so that what comes out of the first goes into the second and so on. 2. A He and H atom collide elastically in a head-on collision. (a). If they have the same kinetic energy (KE) to begin with, which one gains KE? Answer this by calculating the amount gained and lost for both, relative to their initial value. (b). Suppose the atoms had the same mass but different kinetic energies? Do not do a detailed calculation here, but instead make a physical argument as to why the slower thus cooler atoms would slow down the faster, hotter atoms. This is one process for the moderation of hot neutrons in a nuclear fission reactor by the water used as its coolant.