Suppose you titrated your standard acid (KHP) with the base to be standardized, but added several drops extra of the base (i.e. stopped the titration after the phenolphthalein indicator in the solution turned very pink).

If this calculated value was used to determine the molar mass of the unknown acid, what type of error would you have for the molar mass of the unknown acid? (i.e. would you overestimate or underestimate the molar mass value?) Support your answer by, for every step in the calculation, determining whether the calculated value would be greater or less than it should be.

Sand moves without slipping at 6.0 m/s down a conveyer that is tilted at 15?. The sand enters a pipe h = 2.2m below the end of the conveyer belt, as shown in the figure.

What is the horizontal distance d between the conveyer belt and the pipe?

Six hundred and five survivors of a heart attack, were randomly assigned to follow either (1) a diet close to the "prudent diet step 1" of the American Heart Association or (2) a Mediterranean-type diet consisting of more bread and cereals, more fresh fruit and vegetables, more grains, more fish, fewer delicatessen food, less meat. Over four years, researchers collected information on number of deaths from cardiovascular causes e.g., heart attack and strokes. Of the 303 survivors who followed the AHA diet 24 died of cardiovascular disease. Of the 302 survivors who followed the Mediterranean diet, 14 died of cardiovascular disease. Is there a significant difference in the proportion of patients who die of cardiovascular disease across the two diet plans? Run the test at a 5% level of significance. Give each of the following to receive full credit: 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value. You MUSTshow your work to receive full credit. Partial credit is available.

Suppose that there are four people who enjoy a public good. One person has a willingness to pay for the public good of 20 - Q, while the other three each have a willingness to pay of 10 -Q/3.

a) Derive the aggregate willingness to pay?

b) Suppose that the marginal cost of providing the public good is 10. What is the efficient level of the public good, and how much will be supplied if there is no policy in place?

c) What is the deadweight-loss loss relative to the efficient solution - if there is no policy in place?

LetsVacuum, a family-owned manufacturer of high-end vacuum cleaners, has grown exponentially over the last few years. However, the company is having difficulty preparing for future growth. The only information system used at LetsVacuum is an old accounting system. The company has one manufacturing plant located in Selangor; and three warehouses, in Johore, Kedah, and Trengganu. The LetsVacuum sales force comprises only Malaysian nationals, and the company purchases about 25 percent of its vacuum parts and materials from a single overseas supplier. You have been hired to recommend the information systems LetsVacuum should implement in preparing for future growth.

1.   In your own terms,
a.   Identify and briefly describe each of the key business functions of LetsVacuum.

b.   Describe an example of the company’s business process either in any of these functional areas or that is cross-functional in nature. Use diagrams whenever possible to support your description.

For a Western blot method, please explain each step (simple as possible) in the order below

Steps:

- Sample preparation

- Gel Electrophoresis

-Transfer

-Antibody Probing

-Detecting

-Imaging

-Analysis

14. Keller Construction is considering two new investments. Project E calls for the purchase of earthmoving equipment. Project H represents an investment in a hydraulic lift. Keller wishes to use a net present value profile in comparing the projects. The investment and cash flow patterns are as follows: Use Appendix B for an approximate answer but calculate your final answer using the formula and financial calculator methods.

a. Determine the net present value of the projects based on a zero percent discount rate.

b. Determine the net present value of the projects based on a discount rate of 11 percent. (Do not round intermediate calculations and round your answers to 2 decimal places.)

c. If the projects are not mutually exclusive, which project(s) would you accept if the discount rate is 11 percent?

how to put formulate the question :
Calculate the number of atoms present in 3.752g sample of Pb? 

Ethics of Quarantine, analyze the ethics of public health issues by discussing whether the use of quarantine in a given situation is consistent with ethical principles.

HOW NEW YORK GOVERNOR AND THE US GOVERNOR GOT IT WRONG ELDER DURING THE CORONA VIRUS OUTBREAK

1. A million dollar lottery winner decides to quit working. How can you explain this behavior using economics?

2. How does outsourcing affect wages and unemployment in the short run and the long run?

3. If workers became more productive (produced more output in the same amount of time), what would happen to the demand for labor, the wages of labor, and the number of workers employed?

4. Why is it difficult to determine the amount of wage discrimination in the workplace?

5. Which anti-poverty program (welfare, in-kind transfer, or EITC) creates the strongest incentive for recipients to work? Why?