In chapter 2, you learned how to describe and use some properties of motion. You learned that d=v/t. In this virtual interactive lab www.livebinders.com/play/play?id=304463 you will find the relationship between distance, average speed, and time. Click on the lab titled “Motion d=v/t”. Follow procedural instructions given in the lab. Complete the 7 journal questions and the table and upload and submit the lab assignment (both the journal questions and the table) via Microsoft Word. Lab 1 will be due on October 18, 2020 by 11:59 P.M.
If you are unable to go directly to the lab by clicking on the link, copy and paste the link in a new window.
Journal Questions:
1) Which Challenge question are you answering?
2)Which three cars did you select?
3) Which one of your three cars do you predict will answer the challenge question?
4) Which car actually answered the challenge questions? How does this result compare to your prediction?
5) Does the fastest car always travel the farthest? Why or why not?
6) Does the car traveling the longest time always travel the greatest distance?
7) What real-world applications depend on the relationship between distance, average speed, and time
https://uselitetutors.com/wp-content/uploads/2023/01/157561940224894819.png00https://uselitetutors.com/wp-content/uploads/2023/01/157561940224894819.png2023-01-03 06:52:252023-01-03 06:52:27What Is The Relationship BetweenDistance Average Speed And Time
Topic Fluorine For this element, you will provide the information listed and additional information as specified below
1) A cover sheet with the element name or formula and your name (Date, College name, course, Professor’s name, etc.)
2) All the data listed in the table on the below page, with the data in the table with proper units. This table should be typed. You may use any sources you wish (books, periodicals, Internet sites) to collect the data but these sources must be properly cited and the references available in a bibliography (see #4). On the Word file, the links (hyperlinks) to your references must be hot! (they must work!!)
3) Neatly typed narrative description (1,000 words minimum, i.e., about two pages minimum) of the uses, importance, biological significance (if any) historical information, and any additional interesting information for the element. This should be written in paragraph format with proper grammar and spelling. Outlines or lists will not be given credit. Information must be properly cited (see #4). Plagiarism will result in a zero grade for this project with no chance to earn the lost points through other means.
4) List of references or a bibliography, properly cited (minimum of 6 references).
For your in-text citations, use the Chicago System (Author, year, page) see:
Your in-text citation to a printed source should hyperlink to the reference in your bibliography. Your in-text citation to an online source should also hyperlink to the reference in your bibliography. However, the hyperlinks from each of your references should be to the specific webpage(s) where you obtained the information.
5) The points for your project will be as follows:
5 – Table data
5 – Table citations, references
5 – Text, proper citations
5 – Bibliography or list of references, correct format
5 – Softcopy, hyperlinks
25 – Cover page, narrative text (neatness, originality, avoidance of plagiarism, etc.)
https://uselitetutors.com/wp-content/uploads/2023/01/157561940224894819.png00https://uselitetutors.com/wp-content/uploads/2023/01/157561940224894819.png2023-01-03 06:51:482023-01-03 06:51:51Chemistry Project Properties Of An Element
Research and respond to the following 5 U.S. Supreme Court questions. Use academically appropriate websites for your research, and cite your sources. Each response should include at least 50 words, and you are encouraged to incorporate this week’s vocabulary terms into your responses.
1. How was the Supreme Court formed?
2. What powers are granted to the Supreme Court?
3. How does someone get appointed to the Supreme Court?
4. What are the roles and responsibilities of the Supreme Court?
5. How does the Supreme Court interact with the other 2 U.S. government branches? Consider the concept of checks and balances.
Part II:
Research the following Supreme Court cases:
· Brown v. Board of Education
· Roe v. Wade
· United States v. Nixon
Answer each of the 3 questions below separately for each case in a minimum of 50 words. Use academically appropriate websites for your research, and cite your sources. You are encouraged to incorporate this week’s vocabulary terms into your responses.
In this experiment, students will learn how to use the UV-visible spectrophotometer to determine the molar extinction coefficient of organic dyes. In the same time they will learn how to use UV-vis spectroscopy to construct a calibration plot for light absorbing compound. Then, they will be able to identify unknown concentrations of this compound, in this case the organic dye, based on their calibration plot.
Theory
When monochromatic light passes through a sample, the ratio of power transmitted to the original power is called the transmittance T. The Absorbance is equal to the logarithm of the reciprocal of the transmittance:
A = -log T = log (1/T)
In this case, the light absorbance of the sample depends on the molar concentration (c), light path length in centimeters (L), and molar extinction coefficient (ε) for the dissolved substance. The molar extinction coefficient (ε) is a term that determines how strongly a substance absorbs light at a given wavelength per molar concentration. It is also called molar absorptivity or attenuation coefficient.
Therefore, the concentration of the substance dissolved in the solvent can be determined experimentally using a spectrophotometer and based on Beer’s law: A= εLC
Plotting the absorbance against the concentration for a series of dilutions will result in a linear line with the slope = ε, where the light path length (through the sample solution) is 1 cm.
Procedure
1- Carefully perform every step in this procedure, as the grade for this lab will be based on precision and accuracy.
2- In a set of 20 mL glass vials, prepare a series of aqueous solutions of the methylene blue solution, 10, 30, 50, 70, and 100 M. You may prepare a sample of the highest concentration (100 M) and then perform serial dilutions.
3- In a set of 20 mL glass vials, prepare a series of aqueous solutions of the rhodamine B solution, 10, 30, 50, 70, and 100 M. You may prepare a sample of highest concentration (100 M) and then perform serial dilutions.
4- Set the UV-vis spectrophotometer for scan absorbance over the range of 300 − 700 nm.
5- Use DI water to obtain baseline readings of the spectrophotometer.
6- Measure the UV-vis spectra for your series of methylene blue solutions using disposable cuvettes over the range on 300 − 700 nm.
7- Measure the UV-vis spectra for your series of rhodamine B solutions using disposable cuvettes over the range on 300 − 700 nm.
8- Perform the analysis of each concentration in triplicate.
9- Measure the absorbance of the unknown concentration of each dye.
Data Manipulation and Calculations
1- Export data to Excel and calculate average absorbance of each sample.
2- Plot average absorbance vs wavelength and identify the peak maximum.
3- Plot the absorbance at peak maximum against concentration of the dye.
4- Find the slope and regression of the linear fit line. Slope equals extinction coefficient (ε).
5- Calculate the concentration of the unknown sample using extinction coefficient and absorbance.
