margaridaluna03

1. Describe the four areas of Progressive reform.

2. How did women's lives change in the early twentieth century?

3. What policies did Teddy Roosevelt pursue? Which policies were successful? Which policies were not successful?

4. How did the Federal Trade Act impact business' practices?

5. Why do you think President Wilson worked towards business and government reforms and not many of the social reforms?

Instructions: Solve the following problems. Enter numerical result and units in space provided on this cover sheet. Express results to at least three significant figures. Staple supporting hand-written work to this cover sheet. Prob. 1 (2 @ 10 per or 20 pts.) An x-ray diffractometer (XRD) scan on a pure Ir sample results in a first peak at 2qa = 43.978760590730708 deg. Determine the x-ray target material and the x-ray Ka wavelength, l. Refer to AA_Crystal Structures of Some Elements.pdf posted to zip folder. Also refer to Table 1 on right. Assume Kb radiation is fully attenuated. x-ray target material: ________________ Ka wavelength l:_________________ Prob. 2 (18 @ 10 per or 180 pts) An entirely different XRD is �set up� with a Cr target and filters to fully attenuate Kb radiation. (a) Refer to Table 1 and determine the x-ray wavelength, l = ________________ Using this entirely different XRD, scan of a pure but unknown element having BCC or FCC cubic crystal structure reveals 1st and 2nd peaks at 2qA = 30.894581725110008 deg. and 2qB = 44.256158901986623 deg., respectively. (b) Refer to AA_Crystal Structures of Some Elements.pdf posted to zip folder and determine the Unknown Element______________ With respect to the unknown element ID�d in 2(b): (c) What is the cubic crystal structure? _____________ What is the lattice constant? _____________ How many atoms per unit cell? _____________ What is the coordination number? _____________ What is the atomic packing factor? _____________ List the atom positions intersected by the (110) plane? _________________________________________________________________ List the atom positions intersected by the (111) plane? _________________________________________________________________ What is the d111 interplanar spacing in Angstroms _____________ What is the d220 interplanar spacing in Angstroms _____________ What is the densest packed plane? _____________ What is the theoretical density in kg / m3? _____________ What is the published density in kg / m3? _____________ What is the linear atomic density in atoms / mm for the [110] direction. _____________ What is the linear atomic density in atoms / mm for the [111] direction. _____________ What is the planar atomic density in atoms / mm2 for the (110) plane. _____________ What is the planar atomic density in atoms / mm2 for the (111) plane. ____________

The density of an ionic compound was calculated by x-ray diffraction to be 2.411 g/cm3, when the density of the solid was determined by directly measuring the mass and volume of a bulk sample the density was determined to be 2.360. What type of defect is responsible for the difference in density observed? Explain.

Explain why the H-H distances determined for coordinated dihydrogenby X-ray diffraction are always significantly shorter than thosedetermined by neutron diffraction.

In what part of the engine increase the speed of a truck?

How the engine works?

What are the roles of the academic teachers to their students?

Given that if

                  cosec(x) + cot(x) = 3/2

           Then find value of sin(x) = ?

Can African lions thrive in the state of Texas and the Texas Blackland prairies?

1. Would you have joined one of these parties during the Depression? Why or why not? 

2. Why do you think there were Canadians joining radical political parties like the Communist Party of Canada or the Canadian Union of Fascists? 

3. Alliances were being formed, dictatorships were rising, and tensions were growing in Europe as a result of the new borders outlined by the Treaty of Versailles. Should Canada be concerned? Be sure to give a reason if you select this question

1. Would you have joined one of these parties during the Depression? Why or why not? 

2. Why do you think there were Canadians joining radical political parties like the Communist Party of Canada or the Canadian Union of Fascists? 

Find the rate of change of the function f(x)=x2+2x when the limit approaches to zero.

Who invented the zero number?

Paleontologists recently obtained DNA samples from two different groups of woolly mammoths (PLoS Genetics 13: e1006601). The first set of DNA samples was from woolly mammoths which lived 45,000 years ago, when large populations of these animals were common in North America and northern Asia. The second set of DNA samples was from woolly mammoths which lived 4,000 years ago, when the global woolly mammoth population had been reduced to 300 individuals on a single island in the Arctic Ocean. Which of the following would a biologist predict regarding the woolly mammoths and their DNA? CHOOSE ALL THAT APPLY.

Since African elephants contribute to the maintenance of the savannas and open woodlands by reducing tree densities. spreading dung, elephants can enrich soil depleted by cattle.   Can African Elephants help restore  the texas Blackland prairies ecosystem?

What is machine?

Which of the following is true about this display?

a. It shows how humans may have interacted with these large grazing mammals, which are now extinct, in North America.

b. It is inaccurate, because mammoths and mastodons were extinct before modern humans inhabited North America.

c. It tells the story of how Lewis and Clark found and captured a live Mastodon.

d. It is an artistic representation of how we, as humans, are fascinated by fossils of extinct animals, but ironically are now causing another mass extinction.

How can  Dr. Church's de-extinction of mammoths can help restore biodiversity in North America? Could African and Asian elephants thrive in North America and refill the ecological role that mammoths and American mastodons filled?

Plant cells can still use their mitochondria for oxidation of pyruvate, even though plants (as you know) carry out photosynthesis. When and where does oxidation of pyruvate occur in plants? Choose the best answer.

1. At the same time as photosynthesis, in photosynthetic cells exposed to light

2. Only in cells that are storing glucose.

3. Only in those cells that are non-photosynthetic.

4. In photosynthetic cells under light conditions, and in other cells under dark conditions.

5. Continuously in all cells.

Which country was made independent by Simon Bolivar?

Which country was made independent by Emperor Pedro l?

Members of which colonial Mexican social group started the rebellion against Spain?

Explain why bat can travel in the dark without hit any object?

Why were the colonists unhappy with the stamp act?

How to code?

My Environmental Outlook Essay

Directions: Write 0.5 - 1 page short essay in response to the following prompt. Refer to the rubric for Selection of Evidence as you refine your work.

AP Exam Connection: In addition to content knowledge, this skill is among the most valued skills on AP Environmental Science Free Response Questions. Think about how you can strengthen your use of specific terms or ideas and sufficient details or examples as you push the quality of your writing in this course.

Prompt: What experiences, attitudes, and perspectives do you bring when considering environmental science issues?

Your response:

Define strategic voting and explain how it creates a 2-party system

International financial law

‘Crypto-currencies are objects of property rights just as chairs are objects of property rights.’ Critically discuss this statement.