Physics

Numerical simulationFinal report: Comparison simulation data of Si4N3 dielectric material(doi: 10.17188/1197656)I. IntroductionSilicon nitride (Si3N4) is a non-metallic compound composed of silicon and nitrogen. This material is interesting because of its durability, electrical insulation, high thermal stability and high acid resistance that widely used in microelectronics and micro-surface machining technologies.The micro-bolometer devices were fabricated at nano and energy center (NEC) of Vietnam national university (VNU) used Si3N4 shut as a supporting layer for the suspending structure and in absorption infrared radiation (IR) packet. The fabrication method used plasma enhanced chemical vapour deposition (PECVD) system that require high vacuum. The optimization of IR absorption packet by experimental is extremely expensive. Thus, the properties of Si3N4 crystal structure need to investigate by simulation and compare to experiment data.

1. Use the information in Section 6-1 and write a summary of the Nice model of how the solar system formed. Explain how the solar nebula collapsed, how the protosun formed, how the planetary disk formed, the role of temperature at different locations of the solar system (i.e the snow line & how it relates to what substances were found on either side of it), and the role of collision & accretion in forming the planetesimals. This question is worth up to 10 points.2. Use the information in Section 6-2 to summarize how each of these planets formed: Jupiter, Saturn, Uranus, and Neptune formed. Include information about what they are made of and why, the order in which they formed, and where they formed (5 points)3. Use the information in Section 6-3 to summarize how the inner planets formed. Include information on what they are made of as compared to the outer planets, and where their water came from. (5 points)4. Use the information in Section 6-11 and describe the general pattern of orbital size, planet size, and density across the solar system. Also describe the planetary debris (comets, asteroids, meteoroids) and dwarf planets in our solar system including where we would find them and what they are made of. (5 points)5. Use the information in Section 6-12 and compare/contrast the planets in our solar system to planets in other system in terms of their size/density, masses, orbits, age, etc (5 points)Make sure your answers are focused on what is being asked in each question and that the answers are in-depth with lots of relevant details.

Thinking about the idea of attention as a limited, valuable resource, provide an example of the issue that Dr. Wu brings up in the video that you have experienced in your life.

Calculate the efficiency number and write up the results report. Include photos, explanation of what you saw, process steps, discussion of the results, and any other information you feel will explain your choice of beam design and your reaction to its performance.

Write a two-page paper double space that answers the following questions. Any graphs or data that are included does not count towards the required two pages. 12pt font should be used with a one-inch maximum margin. This lab is about CAT/PET Scans. Describe the physics as to how each machine operates! How are they different? How must one prepare for a scan? Why is the procedure for each including the patient’s preparation? What do the scans detect? What are they not used for? Can both scans be taken on all parts of the body? Is the image 2D or 3D? Color or black and white? What is the typical cost for each scan? If you had one, please share your experience.

Typed, Times New Roman, 12-point font A 1 – 3 page, double-spaced essay, in the MLA format With the video, course readings, or readings cited in the video as your only sources Answer all three questions corresponding to the topic. The Good Life v. the Pleasurable Life. Watch the Idea Channel’s video “Is Pleasure the Secret to the Good Life?” at https://youtu.be/qv5GQulYyRg and answer the following three questions; minimum one paragraph per question: According to the philosopher Robert Nozick, a true hedonist would be obligated to choose the “experience machine” over reality. Why? Your response should explain hedonism and the thought experiment of the experience machine. Nozick also maintains that “most people” would reject the experience machine, because a good life means more than just pleasure. What might the good life actually entail, then? Can you connect this to virtue ethics? So, then. Are you “most people”? That is, do you also reject the experience machine? Or… would you choose to plug yourself in for the rest of your life? Why? What does your choice imply about what you think it means to live a good life? Elaborate.

The paper should go from 2.5 to 3 pages long, in a single space, 12 point font. It should have an Abstract (introduction/summary of our paper) on the first page (that’s not part of your 3 pages) and a Reference page at the end (that’s also not part of your 3 pages). All together it would come to ~ 5 pages: Front page/Abstract , then 2.5-3 pages of text and last page of References. If you include pictures, that’s great! But you should still have 2.5 – 3 pages of text. Since we’re making it online, you may also include links to videos if you like. Overall, 2.5 – 3 pages is not that long for a research paper.

No sources required. Attached is instructions for lab assignment. Tables have to be filled out on page 3.

Our society runs on vast quantities of cheap energy, most of which is obtained from burning easily extracted fossil fuels. But as our reserves of these “easy” fuels diminish, we are going to be forced to make increasing use of other sources of energy, such as more “difficult” fossil fuels and various types of nuclear and renewable energy. Your assignment is to do some research and write a brief paper on ONE of these other energy sources. In your paper, you will consider such factors as 1) availability of the energy source 2) the technology needed to make use of (“extract”) the energy source, 3) what the energy source may be useful for, 4) what the energy source may not be useful for, 5) the environmental impacts of using the energy source, 6) the long term sustainability of the energy source, 7) and whether the ease or difficulty of using this source makes pursuing it worthwhile.

Write up cogent responses to the following questions using complete sentences that make sense. You may use online lectures from earlier in this course, outside sources of information, the textbook, and may consult me or classmates, but must write your answers in your own words. You will be graded on whether your responses are correct, how well they are written, and how completely the question is addressed in your response. This is from textbook Physics concepts & connections fifth edition by Art Hobson 1. If you drive through a turn at constant speed, what direction is your acceleration? Based on a free body diagram identify what force is most directly responsible for the car’s acceleration in the turn. What happens to the acceleration if a car is slowing down at the same time as it is going through a turn, answering as completely as possible. Would the car need more or less force to slow down in a turn versus coasting through? 2. Let’s say that a car company has managed to double the gas mileage on its cars in the last twenty years, but now aims to double it again. Based on the second law of thermodynamics, does this seem likely? Is there a way to appear to double the gas mileage of a car that would violate the calculated maximum predicted by the second law of thermodynamics without actually violating that law of physics? Describe how this might be done or possibly is already being done. 3. What energy transformations are involved in: (a) a photovoltaic solar panel trickle charging a battery, (b) a microwave oven reheating some coffee, (c) a climber climbing up a sheer rock face, (d) a battery powering a lightbulb, (e) a slingshot slinging a small rock at a wall. Make sure to answer in terms of specific energy types rather than broad categories of energy types and note that there could be more than two energy types involved in some cases. 4. Sound and light are both waves. Describe at least three distinct phenomena or characteristics that sound and light have in common and are connected with the fact that both are waves. Describe at least three examples of ways in which sound and light are different.