Questions
Use the kinematic equation, df = ½ at2, to calculate the acceleration of each object in...

  1. Use the kinematic equation, df = ½ at2, to calculate the acceleration of each object in Table 1. Record the calculated acceleration in Table 1.

2.    Show a sample calculation:

Table 1: Average Free Fall Time for Various Objects

Drop
Height (m)

Object

Average Free Fall
Time (s)

Calculated
Acceleration (m/s2)

0.865 ± 0.001

Coffee filter

0.625

Cork

0.435

Marble

0.424

Wooden Block

0.421

3. Answer all of the Post-Lab Questions (Note: Information to help with these questions may be available in the Gravity Lab Introduction)

  1. How does the rate of acceleration you calculated for each object compare? Are they similar or different? Why?
  1. The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the equation if the object was 100,000 meters above the ground?
  1. How does air resistance alter the way we perceive falling objects?
  1. Is the force acting on a massive object larger than that acting on a less massive one? How can you verify this without taking any measurements?

In: Physics

You are working in the ED at Harborview Medical Center. You are seeing a 52-year-old male...

You are working in the ED at Harborview Medical Center. You are seeing a 52-year-old male patient who reports cough, fever, sweating, pleuritic chest pain and general malaise. Your examination reveals a fever of 102F, respiration rate 24bpm, rhonchi and decreased breath sounds, tachycardia with pulse of 116bpm, a tender one-inch mass on his right chest wall near his shoulder and right eye injection with reported pain and normal vision.
Your history indicates that he returned from Hawaii yesterday where he participated in the Ironman competition. He was seen in the ED in Kona, Hawaii two days earlier for similar symptoms that initiated 12 hours prior to that visit. He had an appendectomy and shoulder surgery in the past and reports episodic rashes over the past few months. He is married with adult children and works at the Fred Hutchinson Cancer Research Center in a molecular genetics laboratory with no patient care responsibilities. List two questions that you would ask the patient. For each, note your rationale (i.e. note why you think that question will help you diagnose this patients disease).

In: Biology

This problem summarizes typical transactions engaged in by not-for-profit organizations. The American Association for Freedom, a...

This problem summarizes typical transactions engaged in by not-for-profit organizations. The American Association for Freedom, a political think tank, was recently established. During its first year of operations it engaged in the following transactions and was affected by the following events (in summary form):

1. It received a $10,000,000 endowment contribution, all in stocks and bonds.

2. It received $3,000,000 in additional contributions, all restricted for its educational programs and $2,300,000 in unrestricted contributions.

3. It acquired $800,000 in furniture, fixtures, and equipment, all of which have an expected useful life of 10 years.

4. It recognized depreciation on the furniture, fixtures, and equipment, purchased earlier in the year.

5. It spent $2,400,000 on educational programs.

6. It earned $300,000 in interest and dividends on its endowment investments

7. By year-end the value of its investments had appreciated by $600,000.

8. It incurred $1,300,000 in administrative expenses.

9. Near year-end it received a pledge of $4,500,000, to be fulfilled in three annual installments of $1,500,000 beginning in one year. The Association determined that a discount rate of 6 percent was appropriate.

A. Prepare journal entries to record these events and transactions. Be sure to indicate the fund-type in which the entry would be made.

In: Accounting

The defendants are approximately 80 tenants of a 300-unit luxury apartment building on the upper east...

The defendants are approximately 80 tenants of a 300-unit luxury apartment building on the upper east side of Manhattan. The monthly rents in the all-glass-enclosed building, which won several architectural awards, were very high. The landlord brought a summary proceeding against the tenants to recover rent when they engaged in a rent strike in protest against what they viewed as deteriorating conditions and services. Among other things, the evidence showed that during the period in question, the elevator system made tenants and their guests wait interminable lengths of time, the elevators skipped floors and opened on the wrong floors, a stench emanated from garbage stored near the garage and mice appeared in that area, fixtures were missing in public areas, water seeped into mailboxes, the air conditioning in the lobby was inoperative, and air conditioners in individual units leaked. The defendant-tenants sought abatement of rent for breach of the implied warranty of habitability. Did the landlord breach the implied warranty of habitability? Solow v. Wellner, 150 Misc.2d 642, 569 N.Y.S.2d 882, 1991 N.Y. Misc. 169 (Civil Court of the City of New York)

In: Operations Management

1.) FIN3100 is expected to pay a dividend of $3.00 per share one year from today....

1.)

FIN3100 is expected to pay a dividend of $3.00 per share one year from today. FIN3100 required rate of return is rs = 7%. If the expected growth rate is 5%, at what price should the stock sell?

B.)FIN3100 just paid a dividend of $6.00, i.e., D0 = $6.00. The dividend is expected to grow by 100% during Year 1, by 50% during Year 2, and then at a constant rate of 7% thereafter. If Silva's required rate of return is rs = 12%, what is the value of the stock today?

C.) FIN3100 doesn't pay any dividends and it has no plans to pay dividends in the near future. The pension fund manager has estimated FIN3100's free cash flows for the next 3 years as follows: $2.2 million, $2.7 million, and $4.9 million. After the third year, free cash flow is projected to grow at a constant 6%. Calvert's WACC is 10%, the market value of its debt and preferred stock totals $11 million, and it has 2 million shares of common stock outstanding. What is an estimate of FIN3100's price per share?

In: Finance

You are studying a density-dependent elephant population that has the following relationships for the birth rate...

You are studying a density-dependent elephant population that has the following relationships for the birth rate (b) and the death rate (d), as functions of N.

b=0.10+0.03N-0.0005N^2

d=0.20+0.01N

Plot these functions on the same graph (on a separate page). Using Excel can help you with this: plug into the equation a range of numbers for N from 1 to 60 or so elephants. How many equilibrium points are shown by your graph? You do not have to calculate the values of the equilibria, but indicate where they occur on the graph with arrows that show the population size at the equilibrium point(s) (2 points)

Stability is a quality of an equilibrium point such that when the population is perturbed away from that point, it will return to that equilibrium density. To determine the stability, predict what will happen when N is near, but not at, each equilibrium point and determine the trajectory of the population by comparing the relative magnitudes of b and d at your chosen points. Which one(s) of the equilibrium points are stable? Explain your reasoning. (2 points)

How does this model differ from the logistic growth equation? (1 point)

In: Biology

Ants on a Sandwich How many ants will climb on a piece of a peanut butter...

Ants on a Sandwich How many ants will climb on a piece of a peanut butter sandwich left on the ground near an ant hill? To study this, a student in Australia left a piece of a sandwich for several minutes, then covered it with a jar and counted the number of ants. He did this eight times, and the results are shown in Table 3.10. (In fact, he also conducted an experiment to see if there is a difference in number of ants based on the sandwich filling. The details of that experiment are given in Chapter 8, and the full dataset is in SandwichAnts.)42

Table3.10 Number of ants on a sandwich Number of ants 43 59 22 25 36 47 19 21

(a) Find the mean and standard deviation of the sample.

(b) Describe how we could use eight slips of paper to create one bootstrap statistic. Be specific.

(c) What do we expect to be the shape and center of the bootstrap distribution?

(d) What is the population parameter of interest? What is the best estimate for that parameter?

(e) A bootstrap distribution of 5000 bootstrap statistics gives a standard error of 4.85. Use the standard error to find and interpret a 95% confidence interval for the parameter defined in part (d).

In: Statistics and Probability

PART 1:  The FEV1/VC ratio is clinically significant because it is an indicator of ["alveolar surface area",...

PART 1:  The FEV1/VC ratio is clinically significant because it is an indicator of ["alveolar surface area", "airway resistance", "alveolar pressure", "respiratory rate"] . A healthy individual's FEV1/VC ratio is near ["50%", "80%", "90%", "100%"], while an individual with an obstructive lung disease will likely have a FEV1/VC ratio of less than ["50%", "80%", "90%", "100%"] because of a ["decrease in resistance", "merging", "dilation", "collapsing"] of the small airways.

PART 2: Tidal volume increased after exercise because CO2 production ["increased", "decreased"]  owing to the increased metabolic rate of exercising skeletal muscle. This change in CO2 stimulated the ["peripheral", "central"] ["baroreceptors", "photoreceptors", "osmoreceptrs", "chemoreceptors"] resulting in ["faster", "slower"] and  ["shallower", "deeper"] breathing. As a result of the tidal volume increasing, inspiratory and expiratory volumes both ["significantly increased", "significantly decreased", "did not significantly change"] while vital capacity ["significantly increased", "significantly decreased", "did not significantly change"]. Since total lung capacity is equal to the vital capacity plus residual volume (which is a constant), total lung capacity  ["significantly increased", "significantly decreased", "did not significantly change"]      .

In: Anatomy and Physiology

The Bank of Canada takes several measures to protect Canadian Economy. One of the tools Bank...

The Bank of Canada takes several measures to protect Canadian Economy. One of the tools Bank of Canada uses to adjust monetary policies is changing the interest rate. Increasing in interest rate would reduce how much Canadian borrow and spend. This will affect the housing market, as the increased interest rate means lower ability to borrow. A real estate advisor, however, thinks the Ottawa real estate market is hot and that an increase in interest rate would not lower the prices of houses. He assesses the likelihood of Bank of Canada’s action and its effect on house prices in Ottawa:

The likelihood of an increase in the average price of houses in Ottawa if the interest rate increases = 0.15

The likelihood of an increase in the average price of houses in Ottawa if the interest rate maintains the same level = 0.75

The chance of Bank of Canada’s maintaining the current interest rate = 0.65

We are certain that the Bank of Canada does not lower the interest rate in the near future. Bank of Canada believes to strengthen the Economy, the current interest rate should be maintained or increase. If you notice an increase in the price of houses, what probability do you assign to the event that Bank of Canada increased the interest rate?

In: Statistics and Probability

1. If you are examining microscopic sample taken from the digestive system and (at first glance)...

1. If you are examining microscopic sample taken from the digestive system and (at first glance) notice that duodenal glands are present BUT do not see goblet cells with sparse villi then ______________

A.you cannot confirm anything and should examine the tissue a second time.

B. you can confirm that you are viewing tissue taken from the stomach

C. you can confirm that you are viewing tissue taken from the large intestine

D. you can confirm you are viewing tissue taken from the duodenum

2.  When examining tissue you need to be able to distinguish the difference between adventitia and serosa. One of the major ways to do this is by noting __________

These two structures are identical (within the digestive system). The only difference is the location where each is found

A. Adventitia dos not have mesothelium and serosa does

B. Adventitia is connective tissue that is not continuous with the surrounding tissues.

C. Serosa is thick relative to adventitia

D. The only area in the body with adventitia is the esaphogus.

3. Near the muscularis mucosae, the bases of the gastric glands contain fewer parietal cells but many more zymogenic chief cells.

A. True

B. False

In: Anatomy and Physiology