This is a physical science multiple choice test

Please I need this by 1pm I have attached the picture for question 1

1. It just so happens that regardless of the material, when objects are heated up they will start to glow and change colors at near identical temperatures. The plot that you see is called a blackbody spectrum. This plot tells us the intensity or the “amount” of light that an object will emit at different wavelengths (or “colors”). The visible wavelengths are marked by their colors on the plot. To the right of the visible band is lower energy infrared light. To the left of this band is higher energy ultraviolet (UV) light.

Click the + button that is to the left of the intensity scale (far left side of the screen) such that the top of the scale is at .001. (in the picture above the top of the scale says 100).

Now use the temperature slider to the right, and take the temperature all the way down to 300 Kelvin (80 Fahrenheit).  

Now slowly begin to raise the temperature. At approximately what temperature would a heated material (metal, wood, etc.) begin to give off visible light at a deep red color?

Note: This will be the temperature where your spectrum first begins to come off of the wavelength axis in the visible region, and so is giving off a small amount of red light.

• 500 K (440 Fahrenheit)
• 1050 K (1430 Fahrenheit)
• 1800 K (2780 Fahrenheit)
• 2500 K (4040 Fahrenheit)

2. Click the – button that is to the left of the intensity scale to zoom out such that the top of the scale is at 10.

Move the temperature slider to that of a light bulb. The red part of the thermometer on the far right should just be touching the line marked light bulb. At approximately what temperature does the filament in a household light bulb operate?

Note: This is written in blue in the simulation.

• 660 K (728 F)
• 1800 K (2780 F)
• 3000 K (4940 F)
• 5700 K (9800 F)

3. What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

• Infrared light
• Red visible light
• Violet visible light
• Ultraviolet light

4. Click the – button that is to the left of the intensity scale to zoom out such that the top of the scale is at 100.

Move the temperature slider to that of the Sun. The red part of the thermometer on the far right should just be touching the line marked Sun. Approximately what temperature is the surface of the Sun?

• 2100 K (3320 F)
• 4500 K (7640 F)
• 5700 K (9800 F)
• 9800 K (17,180 F

5. Based on the simulation, what type of light does the Sun produce the most?

• Infrared light
• Green visible light
• Orange visible light
• Ultraviolet light

6. Relative to the peak intensity in the Sun’s spectrum, the Sun emits nearly equal amounts of light across the entire visible part of the EM-spectrum. This is demonstrated by the star shaped symbol at the top of the simulation being white. Therefore, if you look at the Sun when it is directly overhead on a clear day, it will appear white.

Click the – button that is to the left of the intensity scale to zoom out such that the top of the scale is at 316.

Use the star shaped symbol above your graph and to the right of the blue, green, and red dots to estimate the temperature at which something will begin to glow blue. At approximately what temperature does the object gain a faint blue tint?

Note: This will also be the temperature where the max intensity of the objects spectrum is in the blue portion of the visible spectrum.

• 3000 K (4940 F)
• 6600 K (11,420 F)
• 7900 K (13,760 F)
• Object cannot glow blue at any temperature.

7.  Note that in the above question, although the object still emits all colors of visible light, it appears blue now instead of white because of the significant difference in the intensity or amount of blue light radiated versus the amount of red light emitted.

Click the + button that is to the left of the intensity scale to zoom in such that the top of the scale is at 1. Now slowly decrease the temperature from 5000K down to 300K (room temperature).

Notice how the entire spectrum decreases in intensity and moves to the right into the infrared region. Even though the spectrum appears completely flat, objects at room temperature and below also emit their own light. If our eyes could detect infrared light, we would be able to see in the dark with warmer objects being brighter than others.

In the introduction of this activity, we mentioned the temperature of your home on hot and cold days. Your body is kept warm in your home primarily by two ways: by direct contact with the air around you and by absorbing infrared light that is radiated from the walls. As you have seen in this activity, the light that is radiated from an object depends almost solely on the temperature of the object. Based on what you have learned here, what is one reason for feeling warmer in your house on a summer day versus a winter day even though your thermostat is set the same?

• The walls of the house are warmer during the summer. Therefore, they radiate more infrared light that can serve to warm our body.
• The walls of the house are warmer during the summer. Therefore, they radiate more visible light that can serve to warm our body.
• The walls of the house are warmer during the summer. Therefore, they radiate more ultraviolet (UV) light that can serve to warm our body.
• The temperature of the walls of the house has no effect on the light they radiate.

8. Since we cannot physically collect data from stars and most other objects in the universe, almost all of the information we obtain from the universe comes from analyzing the light, or spectra, from those objects.The study of light is known as spectroscopy.

As we have seen in this simulation, every blackbody emits light with an easily identified pattern known as the blackbody curve. This is the particular way the total light emitted by a blackbody varies with its frequency.  The exact form of the curve depends only on the body’s temperature. Since we can treat stars as blackbodies, this is incredibly useful in astronomy that shows us that the color of a star is also indicative of its temperature.

Use the simulation to determine the surface temperature of the following star:

Betelgeuse is a red supergiant star in the constellation Orion.

Knowing that Betelgeuse has peak intensity in the red and infrared wavelengths, adjust the intensity scale and temperature until you can determine the approximate surface temperature of the star.

• 3500 K
• 4800 K
• 7700 K
• 11,000 K

9. In this equation:

λ(max)= peak wavelength (cm)

T = temperature (K)

Based on what you have seen in the simulation and your knowledge of proportionality relationships learned this month, what is the relationship between temperature and peak wavelength?

• They are directly proportional.
• They are inversely proportional.
• They are exponentially proportional.
• They are unrelated

10.  Use Wien’s Law to calculate the peak wavelength of Betelgeuse, based on the temperature found in Question #8.

Note: 1 nanometer (nm) = .0000001 centimeters (cm)

• 208 nm
• 400 nm
• 828 nm
• 1800 nm

 

Choose three composers from the Romantic Era. Pretend they all had an opportunity to meet, perhaps at a party. What do you think they might say to one another about music and culture? Construct the conversation as you imagine it. Initial posts are to be a minimum of 250 words. 

In addition to responding to the Forum question, students are also required to respond to two classmates by asking “the composers” additional questions. Responses to others are to be a minimum of 100 words.

Goal: The goal of this forum is to explore the lives and music of Romantic era composers.

This forum addresses course objective #1, #2 and #3. 

Instructions

Initial posts must be 250+ words, using correct grammar and spellcheck, posted by Thursday 11:55 p.m. ET each week. Part of the requirement for a substantive post is to bring something new to the conversation. Read the forum prompt and fully answer it, demonstrate understanding of the lesson/content, include evidence from firsthand experience, reference to the course materials, and apply what you’re discussing to work, life, and reality.

For Peer replies, respond substantively to at least TWO of your classmates for full credit, with 100+ words each post. This helps build a friendly and collegial environment in our class, and its part of your forum grade. Substantively answering questions that the instructor (me!) asks during that week’s discussion DO count toward your participation points. Making substantive posts will make the discussion more interesting and educational for everyone. Please let me know if you have any questions.

This forum addresses course objective #1, #2 and #3.

• Use spell-check and check your word count.
• If you do quote or paraphrase from a source, please list the source at the bottom of your post.
• Your responses should be a friendly greeting and include two or more of the following:
  • Asking a thoughtful question
  • Share additional content or sources
  • Share your insight and experience/offer perspective
  • Give encouragement and making other connections to the topic

The purpose of peer replies is to develop academic discussion and take our thinking to a deeper level in applying this week’s topic.

DUE DATES:

Initial post (250+ words) due: Thursday by 11:55 p.m. ET 

Responses (100+ words each) to 2 or more peers and/or your instructor due: Sunday by 11:55 p.m. ET

Late posts may be reduced by 10% per day late for up to 5 days. Posts 6 or more days late may be reduced by 50% of the possible earned score.

Rubric.Forums.MUSI200.pdf 

 1: Searching for Solutions 0 unread of 0 messagesThis is your chance to review some of the extra resources provided — and maybe find a new best friend! Click on “View Full Description” below for the directions.View Full Description

The internet can be a powerful ally when you are trying to figure out how to solve a problem. The Handy Helpers link takes you to a page with links to videos, math sites, PowerPoints, cheat sheets and other materials that explain the topics covered in the lessons.

HANDY HELPERS

Pick one of the Handy Helpers from Weeks 1 or 2 that no one has reported on, click on Start a New Conversation, and make the subject the name of the link (for example: YouTube PatrickJMT: Finding the Slope of a Line). Then give us a review of the “helper” in at least 150 words. Include what you like or don’t like about it and why you think it may be helpful to others. The site that you review must be on the Handy Helpers list!

Then, for the remaining two posts, respond to two classmates with comments about their post – or a helpful suggestion about related resources.

For your case study, read the sections titled “Visionary” through “Affiliative Summary” of the following article from the required reading assignment:

Preston, G., Moon, J., Simon, R., Allen, S., & Kossi, E. (2015). The relevance of emotional intelligence in project leadership.  Journal of Information Technology and Economic Development, 6(1), 16-40.

In your case study, be sure to address the following items:

• Include a brief statement as to which of the leadership styles (visionary, coaching, affiliative, democratic, pacesetting, and commanding) presented in the article that you are most comfortable employing, in general.
• Select and analyze one of the scenarios below. Be sure to provide the number of the scenario you chose.

Scenario 1: As a manager, you have two employees who have a difficult time working together. While nothing specifically unprofessional has been done by either one of them, other team members have expressed concern that the differences between them are causing tension, and some other team members are having difficulty performing their work. Some have even gone so far as to say that the situation is causing a hostile work environment.

Scenario 2: You are a newly hired department director, brought on board to help turn around a struggling department. The members of this department are highly educated and are taking steps to improve the professional development of department members. Despite these efforts, they feel they are underappreciated and also feel that they lack a voice in the direction in which the department is moving. You have leadership experience in a variety of industries.

• Based on your understanding of the discussed leadership styles in the article, which would you choose to handle this situation?
• What elements of that style do you feel will be most helpful in resolving the problems faced?
• How would you proceed with handling the scenario?
• How does the role of leadership in the decision-making process serve to establish an organizational climate oriented to meet business goals?

Utilize the CSU Online Library to locate one journal article to use as a reference that supports your case study. Your case study should be two to three pages in length.

Be sure to include the rubric elements from the guidelines below:

• The analysis should present an insightful and thorough discussion with strong arguments and evidence.
• The content should be highly relevant and informative while remaining on topic.
• Accuracy and close attention to detail should be clearly evident in all parts of the assignment.
• The writing should be clear and concise with proper sentence structure, grammar, and punctuation, and it should be free from spelling errors.
• The number of sources should meet or exceed assignment requirements, and all sources should be academically credible, and properly cited using APA formatting.

Post by Gabby Bains

15 hours agoWeek 1 Discussion

 The particular insights that have been helpful in understanding the opening themes of Luke in terms of their place within the story of the Bible were learning about the stories of beginning of Mary, John the Baptist, and of Jesus. The stories discussed are important in showing us the background of the people they are written about. Stories about upbringing and tribulations, the good, the bad and the ugly. With these stories, we are provided clues into the shaping and priming of the highlighted people. They also serve as lessons for our, the reader or listener or observer, understanding to live more abundantly and accordingly to His will.

 There were not many points of confusion for me. One question though, may be the understanding of the times and how that impacted the way the highlighted people moved around in life. How that affected their decisions, especially when comparing it to modern life.

https://www.biblegateway.com/versions/New-Revised-Standard-Version-NRSV-Bible/)

Post by Jillian Dineros

1 day agoWeek 1 | Discussion – The Story Continues

I am finding it easier knowing that the place of Luke’s gospel in the Bible is the collection of stories before Jesus’s time. I thought it was helpful to know about Joseph and Mary’s story before the birth of Jesus. It also speaks of his time on Earth amongst his people as a healer. It was also helpful to know that the New Testament takes place 400 years after the last book of the Old Testament. 

I have only followed the Bible when the gospel and readings were read when I would go to catholic mass. I did not know that there were certain themes and perspectives in the different gospel books. When the gospels were read during mass, I would wonder why a section from the book of Luke would sound different than a section in the book of Matthew. I was confused and thought that all of Jesus’s disciples thought and saw him in the same way.