Physics: write abstract description of experiment

Question Description

Please read instructions carefully!

From the attached manual and worksheet, write up part 1 & 2.

Part 1:

• Abstract: Briefly describe the experiment. State the main purpose. Basic idea/concept explored. It shouldn’t be any longer than two paragraphs, and can be shorter if you are skilled at being precise. State key results with a conclusion (whether experiment was successful or not.) If there are no numbers here, you are not being specific enough. If there is only a sentence or two stating the results of your measurement you are not really summarizing the report.

Part 2:

Here you answer questions about WHY you did the things you did. Show your understanding here. For example, why did we use the slope of your graph to calculate whatever value? For what purpose was a particular step included in the procedure?

• Describe the aim for the experiment with the physical concept explored. Define/describe the physical concept clearly explaining the laws involved if possible with examples.

• Describe the measurements and the key results with uncertainties and units obtained, and clarify how they help prove the concept explored above. Interpret your graphs and discuss what trends were observed and what the relationship of the variables in your experiment was. Also, answer the questions mentioned in the lab manual (at the end) or points asked by the TA to discuss.

• Discuss whether the results verify the physical concept or not. If not, then why? This is an opportunity to regain some of the points lost in case the experiment went wrong and the results do not verify by listing and explaining the possible mistakes and unexpected sources of errors.

Earth Science

Question Description

1. To be a mineral, a substance must satisfy five criteria. List these criteria below.

a.

b.

c.

d.

e.

2. Circle the substances below that are minerals.

gold nugget vitamin pill quartz diamond brick

granite amber calcite ice oil ivory

3. For each substance in question 2 that you did not circle, explain specifically why it is not a mineral.

4. Fill in the blanks with the appropriate mineral property. Each property is used once. Properties: luster, hardness, cleavage, fracture, tenacity, color, streak.

a. Mica has a low _______________ because is flexible and not very resistant to bending.

b. The resistance of a mineral to scratching is known as the mineral’s _______________.

c. The least reliable property when trying to identify a mineral is _______________.

d. _______________ is the way a mineral reflects light and can be either metallic or non-metallic.

e. A mineral that breaks in a random patter is said to exhibit _______________.

f. Though a crystal of amethyst is purple, it appears white in powdered from. Thus we say that amethyst has a white _______________.

g. A mineral exhibits _______________ when it breaks along a finite number of smooth planes determined by zones of weakness in the crystal structure.

5. For each of the minerals below, indicate whether they are ferromagnesian silicates, non-ferrogmagnesian silicates, carbonates, or other.

a. Fluorite CaF2

b. Siderite FeCO3

c. Kyanite Al2SiO5

d. Garnet (Pyrope variety) Mg3Al2(SiO4)3

e. Graphite C

Complete Science Lab Task (UMUC)

Question Description

Final Applied Project

As a culminating assessment in this laboratory course, you will complete a final applied project. Your final applied project will emphasize experimental design and the scientific method. The project will be a research plan that you construct for a specific issue related to the physical sciences. This research plan should be about 1-2 pages in length.

During or at the end of the last week of the term, you will submit the research plan to the Assignments Folder for grading. At two earlier times during the term, your instructor will interact with you on specific parts of the project. At the end of week 3, you should submit Part 1 to your instructor for approval. At the end of week 5, you should submit Part 2 to your instructor for approval. No grades are assigned for these earlier submissions; only the final research plan, Part 3, will be graded and counted towards your course grade.

There are three main steps necessary for completion of the final applied project:

Part 2: Review current research knowledge.

  1. Describe how you could perform a review of current research on the subject/issue. Identify which UMUC Library/database sources could be useful in your research review. What criteria will you use in the selection of review sources from the web?
  2. Do the results of your research review lead you to suspect that your initial hypothesis is correct, or does it suggest that you should modify your initial hypothesis in some way? If so, restate or revise. Are there gaps in the current research that further research/experimentation/observation might fill and shed light on your hypothesis?

Chemistry Assignment

Question Description

  • For each of the following queries, supply the missing information or perform the required operation. (1 pt each)
  • Two elements with similar chemical and physical properties from the following: C, S, As, and Si. _______________
  • 1.Write chemicalformulas for the compounds derived from the followingpairs of ions: (5 pts) (a) V3+ and PO4 3– (b) Ti4+ and Cl(c) Mn4+ and PO33– (d) Zn2+ and S2O32– (e) Cr3+ and Se2–
  • Pethidine hydrochloride is available as a 2.5 % solution. What is the concentration of the drug in mg/mL and mcg/mL? Show your work and report your answer to two significant figures. (5 pts)
  • Pethidine hydrochloride is available as a 1:8000 dilution. What is its % concentration? What is its concentration in mg/mL? Show your work and report your answer to three significant figures. (5 pts)
  • The pressure gauge on an E cylinder containing O2 reads 975 psi. (a) What is the volume of O2 in the cylinder? (b) If O2 is dispensed from the cylinder at a rate of 0.500 L/min, how long will the O2 flow last? Assume that a full E cylinder contains 700 L at a total pressure of 2000 psi. Show your work and report your answer to three significant figures. (5 pts)
    • A patient is ordered to take 0.060 gram of Thioridazine orally. Thioridazine is available as a suspension containing 100 mg of Thioridazine per 5.0 mL of suspension. How many milliliters of the suspension should be administered to the patient? Show your work and report your answer to two significant figures. (5 pts)

750 words – Antibody – Antigen (Hepatitis B Virus Surface Antigen Antibody – Hepatitis B Antigen)

Question Description

Topic: Antibody- Antigen (Hepatitis B Virus Surface Antigen Antibody – Hepatitis B Antigen)
Protein is Antibodies/ immunoglobulin
Ligand is Antigen
Total 750 words excluding reference list.
APA style in text citation (e.g.(Schulzeet al., 2010))

it should be written in a way such that you can incorporate those points 1 – 5 inside the writeup. Please make sure to include in-text citations from at least 4 difference references. References must be from a credible source e.g. journal articles.

You should also cover at least one other feature of your chosen interaction – it’s up to you todecide which extra point(s) to cover, as some may be more suitable or more interesting thanothers depending on which topic you have chosen. Qns 1 to 5 is compulsory and qns 6 – 8 below please choose one only:

1. What are the components of the protein and ligand pair that you have chosen?

2. What is the primary biological function resulting from the interaction between this pair ofmolecules? What purpose does the interaction serve?

3. What major cellular activities (metabolic pathways/processes) require this interaction?

4. How do the protein and ligand interact at the molecular level? What are the structuralrequirements for this interaction to occur? What triggers the interaction?

5. Where does this interaction occur (tissue/organ, cell, subcellular organelle)?

6. (example) What happens if the interaction does not occur at all, or if it functionsincorrectly, in nature?

7. (example) Can we artificially manipulate the interaction? If so, to what purpose?

8. (example) Is there any variation in the interaction in different cells or organisms?

Anwer the question below based on the readings

Question Description

Answer the question below base on the book https://reefimages.com/?page=oceansci

Ps : you will find the answer easily if you look at the book

What is science?

  1. · Describe the scientific process using hypothesis, experiment, evidence, theory.
  2. · Compare the difference between scientific theories and non-scientific ideas.
  3. ·Provide two specific examples of how new evidence can alter or refutepreviously held theories. Be sure to identify the new pieces ofevidence.

Maps, Charts, and Graphs

  1. · Define longitude and latitude
  2. · Define GPS coordinates.
  3. · Locate the five major oceans and seven continents on the globe.

Properties of water Segar (Links to an external site.) Ch. 5 89-93 (Links to an external site.) and Crictical Concepts 1 (Links to an external site.) p451-454

  1. ·Explain how the shape of a water molecule: a) makes ice float; b) givesit a high boiling point c) allows it to dissolve ionic compounds(salts).
  2. · Calculate the amount of energy required to raise 500 mL of water by 75oC.
  3. · Define density.
  4. Explain how the density of water changes with temperature.

Properties of seawater Segar.: Ch. 5 (pp 85-105) (Links to an external site.) and Critical Concepts 1 and 6

  1. · Explain how the density of water changes with salinity (dissolved salts).
  2. · List the most 6 abundant elements or ions that are dissolved in water.
  3. · Define salinity and describe the processes that affect salinity in the surface ocean.
  4. · Describe how seawater temperature changes with latitude and with depth.
  5. · Explain what is responsible for the changes.

Earth as a System

  1. · Describe the major reservoirs and fluxes of the water cycle.

Calculations and results of quantitive analysis

Question Description

please answer and calculate the following questions. there’s supposed to be 6 trails but i only have 3 so do for 3.

Results & Calculations

  1. Pool your density values with another student who has the same unknown so that you have six trials to analyze. Calculate the average density and absolute standard deviation for the pooled trials of solution.
  1. Do a Grubbs’ test on the most reasonable outlier.
  1. Calculate the relative standard deviation for the pooled densities. Depending on your Grubbs test, this may require recalculating the average and absolute standard deviation of a new data set.
  1. Obtain the “true” value for the solution’s density from the instructor and calculate % error.
  1. Several standard curves are posted in the lab room. Use the appropriate standard curve to determine the concentration of your unknown solution. Notice that the concentration units in the standard curve are in “M”, which stands for “molarity” and means “moles of solute per liter of solution”. You will learn more about molarity in later Skill Builders, but for now you just need to know that the higher the molarity, the greater the concentration.
  1. A table of results is often used to summarize information from a given experiment, and is particularly useful in a multipart experiment. Generate a table of results to summarize the results of Experiments 1 and 2. Remember, the overall goals were to determine the identity and density of the unknown solution.
  1. Write a one-sentence conclusion for Experiments 1 and 2. Put it in its own section titled “Conclusion”.

Population & Communities

Question Description

Instructions:

Answer all questions in your own words in the space provided on the ANSWER

DOCUMENT or in the EXCEL WORKSHEET.

Answer completely and concisely

Provide all necessary information

Do not ramble on about irrelevant topics

Submit your completed assignment on Canvas before the due date.

————————————————————————————————————

POPULATIONS & COMMUNITIES

1.

[5 points] What are the 3 types of population growth we discussed in class?

2.

[5 points] Assuming a population of deer is experiencing an exponential growth, what are

two possible outcomes that may eventually happen as the population approaches its carrying

capacity? (Hint: Real-life growth)

3.

[5 points] Why are r-strategists better suited for environments that go through rapid changes?

4.

[5 points] Why are K-strategists better suited for environments that are stable?

5.

[5 points] Evolution is an observable trait in all populations; the easiest population to observe

this in is bacteria (as shown in class). Using this knowledge and what we discussed in class,

why would corn grown in fields need larger doses of pesticides to protect the corn against

insects over time?

ECOSYSTEMS

6.

[8 points] Explain why there is less biomass in higher trophic levels using the two laws of

thermodynamics we discussed in Basic Needs of Living Things.

7.

[8 points] Assume that global temperatures keep increasing and all of the ice on Antarctica

melts. The new landscape of Antarctica would be mostly rock, sand, and gravel. Use primary

succession to describe how communities of vegetation may develop there.

BIODIVERSITY

8.

[9 points] Explain how a loss of biodiversity impacts humanity’s ability to develop

medicines.

PHY 108 questions

Question Description

Homework problems: Chapters 7 and 8

  • An average force of 300 N acts on a golf ball for a time interval of 0.04 s. What’s the impulse acting on the ball?
  • What’s the momentum of a 1200 kg car traveling with a speed of 25 m/s?
  • A force of 45 N acts on a ball for 0.2 s. If the ball has a mass of 0.3 kg and is initially at rest:
    a) What’s the impulse on the ball?
    b) What’s the final momentum of the ball?
    c) What’s the final velocity of the ball?
  • An ice skater with a mass of 80 kg pushes off against a second skater with a mass of 32 kg. Both skaters are initially at rest.
    a) What’s the total momentum of the system after they pushed off?
    b) If the larger skater moves off with a speed of 3 m/s, what’s the speed of the smaller skater?
  • A basketball with mass of 0.8 kg is moving to the right with velocity 6 m/s and hits a volleyball with mass of 0.6 kg that stays at rest. If the volleyball moves to the right with velocity 4 m/s after collision, what’s the final velocity of the basketball?
  • A force F1= 20 N is applied to open a door at a distance 50 cm from the spindle. Another force F2is trying to stop opening the door at a distance of 30 cm from the spindle. Find the force F1to balance the door.

What are the differences between elastic and inelastic collisions?

Assignment 1 – Name the six original “Hallmarks” of cancer

Question Description

Answer all the questions in the document.

Assignment 1 – Recap of main points from the first 8 classes (25 points)

  1. Name the six original “Hallmarks” of cancer (3)
  2. What feature of a tumor does a pathologist assess to distinguish between benign and malignant? (1)
  3. Is most cancer thought to be driven by genetics or environmental factors? What are two pieces of evidence that support this conclusion? (2)
  4. Likewise, what are the two contributions that Howard Temin made through his work with retroviruses? What is a provirus? (2)
  5. What was the first oncogene isolated? What kind of protein does it encode? (1)
  6. Define the following terms discussed multiple times in class, as they relate to oncogenesis: (4)
  7. What kind of proteins are most growth factor receptors? Name 3 mechanisms by which growth factor receptors can become oncogenic (3)
  8. v-sis and v-erbB are two viral oncoproteins that cause tumors in host animals. What type of protein is each one? (2)
  9. Likewise, what are threegeneral mechanisms by which “sustained proliferative signaling”, the first hallmark, can be driven? (I’m not looking for specific proteins/names, but rather at what levelcan that be accomplished?) (3)
  10. Mutated Ras has pleiotropiceffects on a cell. Define pleiotropic, and indicate what three major cellular signaling pathways Ras activates (3)

4.Work with tumor viruses greatly advanced the field of cancer research. What did the work of Harold Varmus and Michael Bishop accomplish – that has since served as the foundation of cancer biology? (1)