You are given displacement equation for object in SHM as: x(t)=1.5cos(3.0t) cm.  

a) The period of this oscillation is:    [ Select ] ["2.1 sec", "3 sec", "1.5 sec", "0.48 sec"]         

b) The amplitude of the motion is:        [ Select] ["0.75 m", "1.5 m", "3.0 m"]      

c) The maximum velocity is: [ Select ] ["28 m/s", "4.5 m/s", "0.72 m/s"]      

d) The displacement at t = 0.5 s is   [ Select ]   ["0.12 m", "-0.78 m", "1.5 m"]      

1. Would a 50:50 solution of R and S enantiomers of the same compound have any effect on plane polarized light shining through it? Why or why not?

2. Based on your answer to the last question, how could you determine the enantiopurity of a given concentration of a sample if you know its specific rotation [α] using a polarimeter?

3. Give an example of a drug which can be sold as a racemic (R and S) mixture without any harmful effects.

A 4.2 kg lead ball is dropped into a 2.4 L insulated pail of water initially at 20.0∘C.

If the final temperature of the water-lead combination is 26.0 ∘C, what was the initial temperature of the lead ball?

3. A student comes up with a new ratio to measure performance: she calls it profit
ratio: ROCE/WACC
o What does it measure? Interpret it.
o Do you consider it a good performance measure? Explain.
o Can you think of a better name for it? Why?

Consider the following two investment alternatives, in which Alternative II is more economically attractive than Alternative I:

                                                        Alternative I                Alternative II

            Initial Investment                    $10,000                       $40,000

            Useful life                               5 years                         10 years

            Terminal market value            $1,000                         $5,000

            Annual expenses                     $20,000                             $7,000

            EUAC (12%), approx.            $22,617                         $13,800

Determine the percent change in the annual expenses for Alternative I that would make the two investments equally attractive. (Enter your answer as a positive or negative number without the percent % sign.)

The Strings Object in particular is full of useful classes and methods. You can parse and manipulate strings using several methods of the String class. These methods enable you to count characters, find and extract characters and substrings, replace characters and substrings, combine characters and substrings, and compare strings.

Questions to answer:

1. Identify three such methods and discuss how they are used. Then use them in simple relevant examples

2. As you research the String class, what are some of the most popular uses of substring searching in use today?
3. Are there any uses of strings not covered by the String class or mentioned in the prompt?
4. Are there other classes that inherit from the String class?
5. How does the String class extend or support the Array class?

1. Suppose a market is in equilibrium (i.e., S=D and profits are normal). If demand increases in this market, the equilibrium price will _____________. Ceteris paribus, what effect will this have on profits?  ______________. What happens next to this market and why? __________________. As a result, what happens to price at the new equilibrium? _______________

2. What does the “double price move” or “price reversal” refer to?

3. At equilibrium in an oligopoly, the size of economic profits will usually depend on the strength of ____________

4. Cartels – What they are and what they seek to do?

5. Suppose a market that had been in equilibrium experiences an increase in demand that result in a higher price for the product. What should you expect to happen to the price in the future and why?

6. We have described oligopoly as often having two very different faces. On the one hand, we often see oligopolies where the firms behave as __________________. On the other hand, we often see oligopolies where firms behave as ______________________

7. In a purely competitive market, an innovation that lowers cost will cause the market price to _________________________

8. Do cost reductions in monopolies or oligopolies usually lead to price reductions? __________. What might happen instead? _______________________________

9. What produces a “natural monopoly?” ____What are patent monopolies? ____

What are the three most common types of radioactive decays? How do they differ? Also how many types of decays are there? Please describe them.

On March 31, 2018, the Herzog Company purchased a factory complete with machinery and equipment. The allocation of the total purchase price of $960,000 to the various types of assets along with estimated useful lives and residual values are as follows:

On June 29, 2019, machinery included in the March 31, 2018, purchase that cost $96,000 was sold for $76,000. Herzog uses the straight-line depreciation method for buildings and machinery and the sum-of-the-years'-digits method for equipment. Partial-year depreciation is calculated based on the number of months an asset is in service.

Required:

1. Compute depreciation expense on the building, machinery, and equipment for 2018.
2. Prepare the journal entries to record the depreciation on the machinery sold on June 29, 2019, and the sale of machinery.
3. Compute depreciation expense on the building, remaining machinery, and equipment for 2019.

Please describe how an union may behave by strategically exploiting Marshall’s 4 rules.

Marshall's Rules:

Marshall rules for the elasticity of labor demand Alfred Marshall (1842-1924) described the “rules of derived demand”: Labor demand is more elastic the greater...

1 ... the elasticity of substitution; - the more capital and labor are substitutes, the more easily the firm can replace capital for labor when w increases;

2 ... the price elasticity of output; - w ?? p ?, so the more output responds to p the more the firm wants to reduce labor when w increases;

3 ... the labor share in total cost of production; - w ? increases total costs more when production is labor intensive; when w ? firms reduce labor more in sectors where labor share of costs large. (note: true if elast. product demand > elast. substitution)

4 ... the supply elasticity of the other inputs; - if the supply of factors that can replace labor is large, the firm will substitute away from labor more easily when w increases;

Chapter 2, #31

You are driving through town at 12 m/s when suddenly a car backs out of a driveway in front of you. You apply the brakes and begin decelerating at 3.3 m/s2. How much time does it take to stop? After braking half the time found in part A, is your speed 6.0 m/s, greater than 6.0 m/s, or less than 6.0 m/s?

Phosphoric acid is a triprotic acid (K_a1=6.9x10^-8, K_a2 = 6.2x10^-8, and K_a3=4.8x10^-13). To find the pH of a buffer composed of H₂PO₄^- (aq) and HPO₄^2-(aq), which pk_a value would you use in the Henderson-Hasselbalch equation? Calculate the pH of a buffer solution obtained by dissolving 22.0 g of KH2PO4 and 32.0 g of Na2HPO4 in water and then diluting to 1.00 L

Answer as soon as possible

Given a number, find the sum of all the unique multiples of particular
   numbers up to but not including that number.

If we list all the natural numbers below 20 that are multiples of 3 or 5, we
get 3, 5, 6, 9, 10, 12, 15, and 18.
  
   The sum of these multiples is 78.

Given Code:

public int getSumOfMultiples(int i, int[] set) {
       // Solution
       return 0;
   }
  

As you read about regression this week, try to think of pairs of variables whose values might be associated, or as we say in statistics have a correlation. For example, height and weight have a positive correlation because in general we expect taller people to weigh more than shorter people. This does not mean every taller person weighs more than every shorter person, but that's the tendency. Can you think of another pair of variable that have a positive correlation? How about a pair of variables that have a negative correlation? Try to think of pairs of variables from your field of study! For each variable, consider the following: give a brief description of each variable, how is it measured, what are its possible values, Why do you think the correlation between your two variables is positive or negative?

1. 1. In polarizing microscopy, what is and what happens when a sample is anisotropic?

2. 2.What can happen to image of an anisotropic sample when you rotate it?

3.      3.What additional piece of equipment is added to a polarizing microscope to control anisotropic behavior? How does it accomplish control?