Which of the following situations would produce a Hill plot with n_H < 1.0? Explain your reasoning in each case.

(a) The protein has multiple subunits, each with a single ligand-binding site. Binding of ligand to one site decreases the binding affinity of other sites for the ligand.

(b) The protein is a single polypeptide with two ligand-binding sites, each having a different affinity for the ligand.

(c) The protein is a single polypeptide with a single ligand-binding site. As purified, the protein preparation is heterogeneous, containing some protein molecules that are partially denatured and thus have a lower binding affinity for the ligand.

Which of the following, when added to 1 liter of a 1.0 M NH3 solution would result in a buffer solution? Assume the volume remains at 1 liter.

a) 0.4 mole NaC2H3O2

b) 0.6 mole HNO3

c) 1.5 mole HClO4

d) 0.5 mole HCN

e) 0.5 mole NaOH

A block of mass m = 1.0 kg sliding along a rough horizontal surface is traveling at a speed v₀ = 10.0m/s when it strikes a massless spring head-on (see figure) and compresses the spring a maximum distance X =0.25m. If the spring has stiffness constant k = 100. N/m, determine the coefficient of kinetic friction between block and surface.

Stock X has a 10.5% expected return, a beta coefficient of 1.0, and a 35% standard deviation of expected returns. Stock Y has a 12.0% expected return, a beta coefficient of 1.1, and a 30.0% standard deviation. The risk-free rate is 6%, and the market risk premium is 5%.

1. Calculate each stock's coefficient of variation. Round your answers to two decimal places. Do not round intermediate calculations.

   CV_x =

   CV_y =

2. Which stock is riskier for a diversified investor?

   1. For diversified investors the relevant risk is measured by standard deviation of expected returns. Therefore, the stock with the higher standard deviation of expected returns is more risky. Stock X has the higher standard deviation so it is more risky than Stock Y.
   2. For diversified investors the relevant risk is measured by beta. Therefore, the stock with the lower beta is more risky. Stock X has the lower beta so it is more risky than Stock Y.
   3. For diversified investors the relevant risk is measured by standard deviation of expected returns. Therefore, the stock with the lower standard deviation of expected returns is more risky. Stock Y has the lower standard deviation so it is more risky than Stock X.
   4. For diversified investors the relevant risk is measured by beta. Therefore, the stock with the higher beta is less risky. Stock Y has the higher beta so it is less risky than Stock X.
   5. For diversified investors the relevant risk is measured by beta. Therefore, the stock with the higher beta is more risky. Stock Y has the higher beta so it is more risky than Stock X.
   -Select-IIIIIIIVVItem 3

3. Calculate each stock's required rate of return. Round your answers to two decimal places.

   r_x =  %

   r_y =  %

4. On the basis of the two stocks' expected and required returns, which stock would be more attractive to a diversified investor?
   -Select-Stock XStock YItem 6

5. Calculate the required return of a portfolio that has $6,500 invested in Stock X and $4,500 invested in Stock Y. Do not round intermediate calculations. Round your answer to two decimal places.

   r_p =  %
   
6. If the market risk premium increased to 6%, which of the two stocks would have the larger increase in its required return?

You are given 1.0 mL of the enzyme amylase and add cold 95% ethanol to reach a final concentration of 30% ethanol. What volume of the 95% ethanol did you need to add to the enzyme solution to obtain this concentration? (*note: this one is a little tricky—you will need to account for the starting volume of the enzyme solution.)

A student gets the following data for the heat of neutralization trials using 1.0 M NaOH and 1.0 M HCl.

A. Mass of calorimeter /g trial1:43.5

B. Mass HCl and calorimeter / g trial1:64.0

C. Mass calorimeter, HCl and NaOH / g trial1:85.0

D1. Mass HCl / g (B - A) trial1:.......

D2. Mass NaOH /g (C - B) trial1:.......

Mass of Solution (D1 + D2) trial1:.......

Initial temp. HCl measured / C (therm 1) trial1:22.1

Initial temp. HCl corrected / C trial1:........

Initial temp. NaOH measured / C (therm 2) trial1:21.6

Initial temp. NaOH corrected / C trial1:.......

E. Average Initial Temp corrected / C trial1:.......

Final temp. measured / C (therm 1) trial1:28.8

F. Final temp. corrected / C trial1:.......

G. Temp. change corrected / C o (F - E) trial1:........

Using this data, determine the Molar Enthalpy of Neutralization for this trial. The mcalib calib is 0.969 and b is 2.0 C for both Thermometer 1 and Thermometer 2 and B the calculated heat capacity of the calorimeter was 33 J °C-1 .

a 1.0 x 10³ kg toyota collides into the rear end of a 2.2 x 10³ kg cadillac stopped as a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.8 m before stopping. The police officer,knowing that the coefficient of kinetic friction between the tires and the road was .4 calculated the speed of the toyota at impact. What was that speed? Please show the steps that got you to the answer as that is what I am interested in! thanks

Martin, Inc. is a manufacturer of lead crystal glasses.

The standard direct materials quantity is 1.0 pound per glass at a cost of $0.50 per pound. The actual result for one month’s production of 6,500 glasses was 1.2 pounds per glass, at a cost of $0.30 per pound.

The standard direct labor time is 0.5 hours per glass, at a cost of $18 per hour. The actual results for one month’s production of 6,500 glasses were 0.2 hours per glass, at a cost of $11 per hour.
1- Calculate the direct materials cost variance and the direct materials efficiency variance.

2- Calculate the direct labor cost variance and the direct labor efficiency variance.

3- For each variance, who in Martin’s organization is most likely responsible?

4- Interpret the direct materials and direct labor variances for Martin’s management.

ROE and Leverage Suppose the firm in Problem 1 has a market-to-book ratio of 1.0.

a. Calculate return on equity, ROE, under each of the three economic scenarios before any debt is issued. Also, calculate the percentage changes in ROE for economic expansion and recession, assuming no taxes.

b. Repeat part (a) assuming the firm goes through with the proposed recapitalization.

c. Repeat parts (a) and (b) of this problem assuming the firm has a tax rate of 35 percent

Problem 1 is for reference in the question I need answered above

1.

EBIT and Leverage Castle, Inc., has no debt outstanding and a total market value of $305,000. Earnings before interest and taxes, EBIT, are projected to be $26,000 if economic conditions are normal. If there is strong expansion in the economy, then EBIT will be 20 percent higher. If there is a recession, then EBIT will be 25 percent lower. The firm is considering a debt issue of $95,000 with an interest rate of 6 percent. The proceeds will be used to repurchase shares of stock. There are currently 5,000 shares outstanding. Ignore taxes for this problem.