1. Matching: How do astronomers determine the physical characteristics of stars? Match each characteristic of stars with an important technique

1. Matching: How do astronomers determine the physical characteristics of stars? Match each characteristic of stars with an important technique that astronomers use to determine that characteristic. Refer to Table 18.2 and page 660 in Chapter 19 when answering this question. Each answer will be used once. How do Astronomers determine the … of a star? Technique Surface temperature Radial Velocity Mass Diameter Luminosity Distance Techniques for Question 1: Measure the apparent brightness and determine the distance to the star / Measure the Doppler shift / Measure the light curves and Doppler shifts for eclipsing binary stars / Measure the star’s parallax / Measure the peak wavelength of the star’s spectrum and apply Wien’s Law / Measure the period and radial velocity curves for spectroscopic binary stars 2. Matching: (Review Question 4 on page 682 in OSA) Which method would you use to obtain the distance to each of the following? Choose the best answer below: Method A. An asteroid crossing Earth’s orbit B. A star astronomers believe to be no more than 50 light-years from the Sun C. A tight group of stars in the Milky Way Galaxy that includes a significant number of variable stars. D. A star that is not variable but for which you can obtain a clearly defined spectrum. Methods for Question 2: RR Lyrae and/or Cepheid variable stars can be used to determine the distance / Measure the parallax of the object and calculate the distance by triangulation / The information you have is sufficient to allow you to place the star in the correct location on the H-R diagram; this allows you to accurately estimate the object’s luminosity and, using the inverse-square law, its distance / Send a radar beam toward the object and measure the return time †3. (Review Question 5 on page 682 in OSA) What are the luminosity class and spectral type of a star with an effective temperature of 5000 K and a luminosity of 100 Lsun? A. First, calculate the radius of the star relative to the Sun using the equation L*/Lsun = (R*/Rsun)2 (T*/Tsun)4. The radius of this star is ( 1/100 times / 1/10 times / 1/5.5 times / the same as / 10 times / 13.5 times / 100 times) the radius of the Sun. B. The luminosity class of this star is ( Ia / Ib / II / III / IV / V / wd ). This indicates that it is a ( Bright Supergiant / Less Luminous Supergiant / Bright Giant / Giant / Subgiant / Main Sequence / White Dwarf ) star. If you need help, refer to page 676 in OSA. C. The spectral type of this star is ( O / B / A / F / G / K / M ). If you need help, refer to Table 17.2 on page 601 in OSA. †4. What are the spectral type and luminosity class of the star Regulus which has a surface temperature of 10,750 K and a luminosity of 220 Lsun? Regulus is in the constellation Leo and represents the Lion’s Heart. A. First, calculate the radius of Regulus relative to the Sun using the equation L*/Lsun = (R*/Rsun)2 (T*/Tsun)4. The radius of the star Regulus is ( 1/220 times / 1/20 times / 1/13.5 times / the same as / 4.3 times / 20 times / 220 times) the radius of the Sun. B. The spectral type of this star is ( O / B / A / F / G / K / M ). If you need help, refer to Table 17.2 on page 601 in OSA. C. The luminosity class of this star is ( Ia / Ib / II / III / IV / V / wd ). This indicates that it is a ( Bright Supergiant / Less Luminous Supergiant / Bright Giant / Giant / Subgiant / Main Sequence / White Dwarf ) star. This is not easy to interpret using Figure 19.15 in OSA. I recommend that, instead, you determine where Regulus would plot on the H-R diagram we used for questions 7 and 8 on the Chapter 18 homework; this version is easier to interpret because it is contoured in terms of solar diameters. †5. (Thought Question 18 on page 683 in OSA) A G2 star has a luminosity 100 times that of the Sun. What kind of star is it? How does its radius compare to that of the Sun? Refer to Figure 19.15 when answering part A of this question. A. The luminosity class of this star is ( Ia / Ib / II / III / IV / V / wd ); it is a ( Bright Supergiant / Less Luminous Supergiant / Bright Giant / Giant / Subgiant / Main Sequence / White Dwarf ) star. B. The radius of this star is ( 1/100 times / 1/10 times / the same as / 10 times / 100 times ) that of the Sun. †6. (Thought Question 19 on page 683 in OSA) A star has a temperature of 10,000 K and a luminosity 10-2 Lsun. What kind of star is it? Refer to Figure 19.15 when answering this question. The luminosity class of this star is ( Ia / Ib / II / III / IV / V / wd ); it is a ( Bright Supergiant / Less Luminous Supergiant / Bright Giant / Giant / Subgiant / Main Sequence / White Dwarf ) star. 7. (Thought Question 20 on page 683 in OSA) What is the advantage of measuring a parallax distance to a star as compared to our other distance measuring methods? a. Results from the parallax method can be directly compared to results from measuring the periods of Cepheid variable stars since there are a number of these stars located close to our Solar System. b. Distances calculated by the parallax method do not rely on any assumptions made about the star; these distances depend only on geometric calculations. c. As long as a clear spectrum of the star can be obtained, its distance can be calculated using the parallax method. 8. (Thought Question 21 on page 683 in OSA) What is the disadvantage of the parallax method, especially for studying distant parts of the Galaxy? The parallax method can only be used ______. a. for stars that are relatively close to us in the Milky Way Galaxy. b. if a clear spectrum of the star can be obtained. c. if the star of interest is part of a binary system. d. if the star of interest is a particular type of variable star. 9. (Thought Question 24 on page 683 in OSA) Why would it be easier to measure the characteristics of intrinsically less luminous Cepheids than more luminous ones? The relationship that pertains specifically to Cepheid variable stars is the ( Hertzsprung-Russell / period-luminosity / mass-luminosity / Stefan-Boltzmann ) relationship. Hence, the most important characteristic that astronomers want to measure for a Cepheid variable star is ( its surface temperature / its Doppler shift / its absorption lines / the period of its light curve ). It would be easier to make this measurement for a less luminous Cepheid because ( it is easier to measure low surface temperatures rather than high surface temperatures / these have a greater Doppler shift / they have stronger absorption lines / the period for less-luminous Cepheids is shorter making it easier to measure). 10. When Henrietta Leavitt discovered the period-luminosity relationship, she used Cepheid variable stars that were all located in the Large Magellanic Cloud (LMC). It was (easier / more difficult ) to compare Cepheids in the LMC rather than those located in the Milky Way Galaxy because they are all ( about the same distance away / located at widely varying distances from Earth ). As a result ( differences in apparent brightness are directly related to differences in intrinsic brightness of these stars / all of these stars have the same Doppler shift / all of these stars have the same proper motion ). †11. (Figuring for Yourself Question 28 on page 684 in OSA) Estimate the minimum and maximum time it takes a radar signal to make the round trip between Earth and Venus, which has a semimajor axis of 0.72 AU. Hint: draw a diagram! See the one-slide PowerPoint titled “Superior and Inferior Conjunctions” if you need help. The minimum distance between the Earth and Venus (inferior conjunction) is _____ AU. Your answer should be in the format x.xx. The maximum distance between the Earth and Venus (superior conjunction) is _____ AU. Your answer should be in the format x.xx. How long does it take a radar signal to make the round trip between the Earth and Venus when Venus is at its minimum distance from Earth (inferior conjunction)? It takes a radar signal ____ minutes and ____ seconds to travel between the Earth and Venus and back when they are at their minimum possible distance apart. Enter a whole number in each blank; the number in the second blank should be less than 60. How long does it take a radar signal to make the round trip between the Earth and Venus when Venus is at its maximum distance from Earth (superior conjunction)? It takes a radar signal ____ minutes and ____ seconds to travel between the Earth and Venus and back when they are at their maximum possible distance apart. Enter a whole number in each blank; the number in the second blank should be less than 60. †12. (Figuring for Yourself Questions 38 and 39 on page 684 in OSA) The most recently discovered system close to Earth is a pair of brown dwarfs known as Luhman 16. It has a distance of 6.5 light years. A. How many parsecs is this? _______ parsecs. Round your answer to the nearest whole number. B. What would the parallax of Luhman 16 be as measured from Earth? The parallax of Luhman 16 is ______ arcseconds. You may enter your answer as a fraction or a decimal number. †13. The star Fomalhaut is 25 light-years from us. What is this distance in parsecs? ____ parsecs; your answer should be in the format x.x. What would be the parallax of Fomalhaut? ______ arcseconds; give your answer in the format x.xx †14. Star A has a parallax of 0.4 seconds of arc, while star B has a parallax of 0.06 seconds of arc. Which star is closer? Star A is ( closer to / farther from ) Earth than Star B. Star A has a parallax of 0.4 seconds of arc. Star A is ( 0.06 / 0.4 / 1.3 / 2.5 / 5 / 10.6 / 16.7 ) ( parsecs / light-years) from Earth. Star B has a parallax of 0.06 seconds of arc. Star B is ( 0.06 / 0.4 / 1.3 / 2.5 / 5 / 10.6 / 16.7 ) ( parsecs / light-years) from Earth. †15. The parallax of the star Regulus is 0.042 arcseconds. What is the distance to Regulus in parsecs? ______ parsecs; your answer should be in the format xx.x. What is the distance to Regulus in light-years? ______ light-years; round your answer to the nearest whole number. †16. (Question 40 from A. Frank, 2016, page 103) Two stars are known to have the same luminosity, but one appears one-sixteenth (1/16) as bright as the other. How many more times distant is the dimmer star? The dimmer star is ____ times more distant than the brighter star. Enter a whole number in the blank. †17. (Question 41 from A. Frank, 2016, page 103) Star A is 9 times as far away as star B. Both appear to have the same brightness. What is the ratio of the luminosity of star A to that of star B? Star A is ____ times as luminous as star B. Enter a whole number in the blank. 18. (Figuring for Yourself Question 41 on page 684 in OSA) What physical properties are different for an M giant with a luminosity of 1000 Lsun and an M dwarf with a luminosity of 0.5 Lsun? What physical properties are the same? Place “same” or “different” in each blank. Surface temperature CLICK TO ORDER NOW

Write a conclusion for the lab with the following Format: A one paragraph (5-10 sentences) typed summary of the results
Write a conclusion for the lab with the following Format: A one paragraph (5-10 sentences) typed summary of the results of your experiment. It will consist of answering the following four elements, using complete sentences and proper grammar: • What was the purpose of the lab? To measure a quantity, verify a theory, etc.? There may be more than one purpose to an experiment. • Discuss quantitatively the main result of the lab. Was the quantity measured accurately and/or precisely? Was the theory proved or disproved? Cite specific values, from the results, to numerically justify your answers to these questions. • Identify at least one source of error in the experiment. Qualitatively describe how this error affected or might affect the raw data and the final results. Do not use “human error” as your source of error. • What improvement or change would you make for this experiment to increase its accuracy and/or precision? CLICK TO ORDER NOW

I would like to design a sphere to be inserted in a pipe the max pressure is 10k psi max
I would like to design a sphere to be inserted in a pipe the max pressure is 10k psi max temperature is 150 C min pressure is 2k psi the diameter is 4 in I would like to know every step taken how to calculate the pressure ,stress, what material can resist 10k psi what should be the thickness of the wall anything I missed please let me know if you have any question CLICK TO ORDER NOW

Brief Written Statements Containing Main Conceptual Ideas From The Assigned Reading Material In Your Own Words
brief written statements containing main conceptual ideas from the assigned reading material in your own words, accompanied by three written questions you would like to be answered in the class Chapter 3: Operators and observables 3.3.1 –3.3.2- 3.3.3 this is together than writing three questions Angular momentum operator and statistical interpretation. 3.3.4, 3.3.5 this is together than writing three questions chapter 4: 4.1.1 – 4.1.2 this is together than writing three questions CLICK TO ORDER NOW

answer the questions for the Quantum mechanics book from section 3.3.1 – 3.3.3 Why is it important to use Hermitian
Writing Assignment Writing Serviceanswer the questions for the Quantum mechanics book from section 3.3.1 – 3.3.3 Why is it important to use Hermitian operators to represent observables? What is a connection between measurements and eigenvalues of operators representing observables? Describe a quantization procedure for observables constructed out of coordinate and momentum? What are the fundamental commutation relations in quantum mechanics? What is a quantum Hamiltonian? section 3.3.4 – 3.3.5 see the attached questions on the file CLICK TO ORDER NOW

Project Description: Mechanics extends well into your everyday life, describing the motion, forces and energy of ordinary experience. For everyday
Project Description: Mechanics extends well into your everyday life, describing the motion, forces and energy of ordinary experience. For everyday living, activities, sports, and amusement (such as movies and cartoons), you might take for granted exploit the rules of Mechanics of physics. Now after taking the Mechanics Class, Please select 8-10 examples where you deem the laws of mechanics are beautifully demonstrated, followed or severely misunderstood by most of people. You could also choose a small clip from a movie or cartoon, in which scenes where the laws of physics are violated. For all the examples you are presented, please describe the problems clearly. Make measurements or at least some estimated numbers, for each steps, please use physics concepts and equations to demonstrate the logic behind these examples and explain explicitly why it follows the laws of physics. For some scenes or segments in the movies/cartoons, which are not physically possible, explain thoroughly why and how. For some phenomena which are often-misinterpreted/understood by general public, first list what is wrong interpretation, and then provide the correct physics understanding of these phenomena. I would expect every example you listed will have the equations we learned from this class, and some specific calculations (can be based on estimated numbers or some specific numbers which you should cite their resources) to support why it is physically making sense or physically impossible. I have gone through some examples during the lecture, which could be used as your base line for examples. CLICK TO ORDER NOW

The questions in Section 1 are based off of the following three figures below. Figure 1: Surface Weather Conditions for
The questions in Section 1 are based off of the following three figures below. Figure 1: Surface Weather Conditions for the Continental United States at 2200 UTC (3pm PDT) on March 22nd, 2019 Figure 2: Upper Air (300mb) level map for the same time (2200 UTC 3/22/19) as Figure 1 Figure 3: Doppler Radar Surface Reflectivity (Left) and Velocity (Right) from the Amarillo, Texas weather station taken at 2315 UTC (4:15pm PDT) on 3/22/19. From Figure 1, there is ____________________________ near Amarillo, Texas. All of these are TrueThunderstorms (as seen as orange/red spots embedded in a blob of green radar returns). A Low Pressure SystemA Warm Front The dew point temperatures of locations south of Amarillo are in the 50’s and 60’s, which indicate that there ________ sufficient moisture for thunderstorm development. Isn’tIs Also, from Figure 1, surface weather features (such as the presence of a warm front and low pressure system) indicate that: There is a triggering mechanism present to lift moisture into the atmosphere.There is no triggering mechanism to lift moisture into the atmosphere. Looking at Figure 2, which shows upper-level conditions over the United States, there is a _________________ present to the West of Amarillo. RidgeTrough Zonal Flow Furthermore, to the west of Amarillo (specifically over Colorado and New Mexico), there is an area where plotted station models are featuring a Pennant, plus some combination of short or long feathers, indicating that there is ________________ present. Not enough evidenceAn area of low wind speeds of completely Calm Winds A Jet Streak/Area of Stronger Winds Putting all of this together, there is ________________________________ present to allow for thunderstorms. Supportive Upper-Level ConditionsAll of These None of TheseSufficient Moisture A Triggering Mechanism Finally, looking at Figure 3, which shows both base reflectivity/velocity, there _______ sufficient evidence that thunderstorms are occurring near/to the west of Amarillo, Texas. Additionally, the base velocity image shows some “speckles” of red embedded in the large body of green due East of Dalhart, indicating that __________________ are possibly present. Is; TornadoesIs Not; Tornadoes Is Not; Clear Skies and Calm WeatherIs; Clear Skies and Calm Weather The questions in Section 2 are based on figures 4, 5 and 6 below, which are maps indicating the position, intensity, and forecast for Tropical Cyclone Matthew, which was one of the quickest intensifying and most damaging hurricanes to hit the Florida Panhandle in history. Figure 4: Matthew at 10pm CDT on Sunday, 10/7/2018 . Figure 5: Matthew at 7pm CDT on Monday 10/8/2018 Figure 6: Matthew at 7pm CDT on Tuesday, 10/9/2018. At 10pm CDT on Sunday, October 7th (Figure 4), Michael was a: Tropical StormHurricane Major HurricaneTropical Depression While Hurricane Michael was ____________________ to eventually make landfall along the Florida Panhandle, there _____________________ Tropical Storm/Hurricane warnings issued for Florida at 10pm CDT on 10/7/2018 (Figure 4) Not Forecast; WereForecast; Were Not Forecast; WereNot Forecast; Were Not The reason why your answer to the question above is true is because The storm was forecast to weaken before reaching Florida.None of these are true. The storm is forecast to move away from Florida, leaving it unaffected.It is still too early to issue warnings (which are issued between 24-48 hours ahead of tropical storm/hurricane conditions arriving). Moving ahead to 7pm CDT on 10/8/18 (Figure 5, which is 21 hours later from Figure 4), Michael has: Remained a Tropical StormStrengthed into a Major Hurricane Strengthed into a HurricaneWeakened to a Tropical Depression At this time (Figure 5), watches and warnings _____________ been issued for Florida. Still Have NotHave At 7pm CDT on 10/8/18 (Figure 5), Michael was forecast to strike the Florida Panhandle as: A Major HurricaneA Tropical Depression A HurricaneA Tropical Storm Finally, 24 hours later (7pm CDT Tuesday, 10/9/2018), Michael had ____________________________. Actually had Weakened into a Tropical DepressionActually Weakened into a Tropical Storm Indeed Strengthed into a Major HurricaneHad Dissipated Thank you for being a great class. Let me know if there is anything I can do for you in the future. Best Wishes and enjoy your Spring Break! CLICK TO ORDER NOW

Write a four to six (4-6) page paper in which you: Examine the pros and cons from the perspective of
Write a four to six (4-6) page paper in which you: Examine the pros and cons from the perspective of Crestview Hospital of the placement of its new billboard directly adjacent to Briarwood Medical Center. Interpret the reaction of customers and other community stakeholders to the billboard postings.Use competitive marketing entry strategies to suggest the action that Briarwood Hospital should undertake to counter the messages in the new Crestview Hospital Billboard postings.Recommend the marketing communication strategy or strategies that both Crestview and Briarwood Hospitals should employ. Justify why the Governing Board of both hospitals should take a proactive role in promoting and implementing effective marketing strategies.Assess the value of the various marketing research tool(s) that Briarwood and Crestview hospital could use to promote effective marketing communication strategies. Justify your response.Use at least five (5) quality academic resources. Note: Wikipedia and other Websites do not qualify as academic resources.Your assignment must follow these formatting requirements: Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format. Check with your professor for any additional instructions.Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required assignment page length. The specific course learning outcomes associated with this assignment are:Evaluate marketing research tools involved in the marketing process.Formulate competitive market entry strategies based on analysis of global markets that comply to initiatives in the health care industry.Determine the marketing communications strategy used in health care services.Use technology and information resources to research issues in health services strategic marketing.Write clearly and concisely about health services strategic marketing using proper writing mechanics. Grading for this assignment will be based on answer quality, logic / organization of the paper, and language and writing skills, using the following rubric found here. By submitting this paper, you agree: (1) that you are submitting your paper to be used and stored as part of the SafeAssign™ services in accordance with the Blackboard Privacy Policy; (2) that your institution may use your paper in accordance with your institution’s policies; and (3) that your use of SafeAssign will be without recourse against Blackboard Inc. and its affiliates.https://blackboard.strayer.edu/bbcswebdav/institution/HSA/505/1138/case-studies/64487_CH08_Fortenberry_Missed-Opportunities.pdf CLICK TO ORDER NOW

Textbook 7.2.E. Calculate the speed of sound and the Alfvén velocity in the solar wind at Earth’s orbit. Compare your
Textbook 7.2.E. Calculate the speed of sound and the Alfvén velocity in the solar wind at Earth’s orbit. Compare your answers with the quiet solar wind velocity. Textbook 7.7 E. The Gauss coefficients for Jupiter’s magnetic field are: g01 = 4.218, g11 = −0.664, and h11 = 0.264 gauss. Calculate the magnetic dipole moment, the angle between the magnetic and rotational angle, and the longitude of the magnetic north pole CLICK TO ORDER NOW

Identifying more than 13 geomorphic features and land-forms (rock types, formations, etc.) from the photos. Please note that you need
Identifying more than 13 geomorphic features and land-forms (rock types, formations, etc.) from the photos. Please note that you need to identify these features that you have learned in your college geography course. Features that you could have identified before taking the course will not count for credit. Examples of things that count are: composite volcano, sandstone deposit, karst topography, braided stream, coastal features etc. Examples of things that do not count are: valley, water, hill, place, stuff, etc. There are total 18 photos. Please help to me define the relevant geometric features and land forms. Some photos are same geomorphic features, or are not available for definition. Therefore, you only need to define more than 13 photos. You will need to write a discussion piece of at least three college level sentences per land-form. Please treat this assignment as a research journal- use citations sources. CLICK TO ORDER NOW

To complete this lab please do the following: 1. READ the intro paragraphs to understand what is happening to the
To complete this lab please do the following: 1. READ the intro paragraphs to understand what is happening to the lab. 2. View the Prediction Demo Video first to complete questions 1-2. 3. Open the simulation and complete questions 3-11. REMEMBER TO SHOW ALL MATH WORK!! 4. Once #11 is completed you may view the Verification Demo Video to verify whether your conclusions are indeed correct. 6. For the 2nd data table note that B and B1 are different values from the data table in #3. Solve 13-14 based off of the method of table 2. REMEMBER TO SHOW ALL MATH WORK!! 7. Print out the last page of the lab and use a ruler to complete Part 2. REMEMBER TO SHOW ALL MATH WORK!! CLICK TO ORDER NOW