Thursday

October 2, 2014

October 2, 2014

Total # Posts: 458

**chemistry**

Prepare 1.5 liters of 0.25 M Tris buffer, pH 7.5. Useful information: pKa Tris = 8.1 Formula weight of Tris (hydroxymethyl aminomethane) base = 121.1 Formula weight of Tris hydrochloride (acid form) = 158.0
*September 26, 2012*

**chemistry**

first task is to prepare 250 ml of 3 M glucose. Then You are preparing a solution and the recipe calls for 25 ml of 10% glucose. How much of the 3M glucose stock would you need to add to so that you are adding the same molar amount of glucose?
*September 25, 2012*

**chemistry**

Prepare 150 ml of a reaction buffer containing 0.75% MgCl2, 35mM glucose, 750 nM ATP, and 20 mM Tris-Cl, pH 7.5. In addition, you have a 20% MgCl2 stock solution and the lab freezer has 10 mM ATP that you can dilute to the correct concentration.
*September 25, 2012*

**chemistry**

How would you prepare 500 ml of a 1.8 M phosphate buffer (pH 6.8) containing 4.5 x 10-6 M CaCl2 and 52 mM sucrose?
*September 25, 2012*

**math investment**

8. (TCO A) You can tax shelter only one-half of your retirement savings. You want to invest one-half of your savings in bonds and one-half in stocks. How much of the bonds and how much of the stocks should you allocate to the tax sheltered investment? (Points : 5) ...
*August 9, 2012*

**math**

3. (TCO A) The following questions are worth 5 points each. Please show all work. a. Inflation is expected to average five percent for the long term and Mr. Smith earned $74,000 this year, how much must he earn in 20 years just to keep up with inflation and maintain the ...
*August 5, 2012*

**math**

Joe is purchasing a new truck for $30,000. Joe is making a $2,000 down payment, and he will make 60 monthly payments of $541 each. What are the total finance costs on this loan?
*August 5, 2012*

**math**

Leslie has been offered the choice of either a $1,000 rebate or a 5.5 percent, 48-month loan for the new car she is purchasing. If Leslie will be financing $15,000 and she can get a 7.5 percent, 48-month loan at her credit union, should she take the $1,000 rebate or the 5.5 ...
*August 5, 2012*

**Accounting**

If a client asks me to do a balance sheet for a given month, but they put a question mark beside Truck and Accounts Payable in the assests column..can I even do the balance sheet since these are part of the assests?
*July 1, 2012*

**algebra**

A company produces doll houses and sets of doll furniture. The doll houses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items per week. Existing orders ...
*June 20, 2012*

**algebra**

The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 28 in., find the width of the rectangle.
*June 20, 2012*

**algebra**

Adult tickets for a play cost $16 and child tickets cost $6. If there were 25 people at a performance and the theater collected $260 from ticket sales, how many adults and how many children attended the play?
*June 20, 2012*

**Mergers and Acquisitions**

Why did M & A activity decrease in the late 1980s and early 1990s? Why did M & A activity increase again in the latter part of the 1990s?
*June 17, 2012*

**Mergers and Acquisitions**

Define winner's curse in the context of M & As. How can the buying company avoid the pitfalls of the winner's curse?
*June 17, 2012*

**Mergers and Acquisitions**

List any three of the reasons why the firm would continue to exist beyond the point where its products have become obsolete.
*June 17, 2012*

**Mergers and Acquisitions**

How does goodwill (under FASB 141 R) impact cash flows of the combined entity? How do the 1993 tax law changes impact goodwill and the after tax cash flows of the combined entity after the M & A?
*June 17, 2012*

**Mergers and Acquisitions**

Fair value determination of goodwill and calculating the premium paid over market value in a merger: Using fair value accounting for goodwill, under FAS 141R, determine the amount of Goodwill that "the acquiring company" enters on its balance sheet in the following ...
*June 17, 2012*

**Mergers and Acquisitions**

List the three ways that tender offer legislation protects target company shareholders?
*June 17, 2012*

**Mergers and Acquisitions**

Define a horizontal merger. How can a horizontal merger produce synergy benefits?
*June 17, 2012*

**Physics**

To supply the plumbing system of a New York office building, water needs to be pumped to a tank on the roof, where its height will provide a "head" of pressure for all the floors. The vertical height between the basement pump and the level of the water in the tank is...
*June 15, 2012*

**chem**

At room temperature (25oC) and normal atmospheric pressure (760 torr), the average person’s lungs have a total capacity of about 5.5 liters. If a person takes a deep breath and then dives deep into a lake where the temperature is 19oC and a pressure of 915 torr, what will...
*May 25, 2012*

**Math 12**

A hard rubber ball is dropped from a moving van with a height of 5 metres. The ball rises to 80% of the previous height after each bounce. a) determine the total vertical distance the ball has traveled when it strikes the ground the eighth time. b) estimate the total vertical ...
*May 11, 2012*

**Biochemistry**

for mutation in glycogen metabolism. what happen if a) loss of the gene that encodes alpha 1,4 glucosidase b)loss of the gene that encodes Glucose-6-phosphatase in liver.
*April 25, 2012*

**Chemistry**

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
*April 16, 2012*

**Chemistry**

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
*April 16, 2012*

**Chemistry**

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}
*April 16, 2012*

**Chemistry**

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}
*April 16, 2012*

**math**

Salma's penny bank is 1/2 full. After she adds 360 pennies, it is 4/5 full. How many pennies can Salma's bank hold?
*March 30, 2012*

**Biochemistry**

please help 1. An uncharged solute (S) is transported by symport with H+. The Delta Psi is -120 mV and the Delta pH is 1. A) what is the expected Sin/Sout if the S:H+ symport ratio is 1:1? B)what is the expected Sin/Sout if the S:H+ symport ratio is 1:2? C)What would be the ...
*March 28, 2012*

**Chemistry**

what is the magnitude of delta for [Ti(H2O)6]3+ in kj/mol?
*March 26, 2012*

**Economics**

The market demand in a Bertrand duopoly is P = 15 - 4Q, and the marginal costs are $3. Fixed costs are zero for both firms. Which of the following statement(s) is/are true? a.P = $3. b.P = $10. c.P = $15. d.None of the statements associated with this question are correct.
*March 20, 2012*

**Chemistry**

My teacher gave us the answer to a chemistry problem and i cannot figure out how she got the answer. Can you help me work out this problem so i can better understand it. A gas under an initial pressure of 0.60atm is compressed at a constant temperature from 27L to 3.0L. The ...
*March 19, 2012*

**Chemistry**

Ok so i'm confused because T=273K is already in Kelvin.
*March 19, 2012*

**Chemistry**

what is the chemical equation of copper II oxide and carbon monoxide (include phases)?
*March 9, 2012*

**Chemistry**

Calculate the percent ionization of 0.120 M lactic acid (Ka=1.4*10^-4).
*March 2, 2012*

**Math**

For each point in a set of points, its distance from (-2,4) is three times its distance from the line x=6 1. find the equation 2. tell which conic section the graph will be.
*March 1, 2012*

**BCMB**

Can anyone please help me how to calculate the turnover number? The enzyme reaction shown was performed in a 10 ml volume with a concentration of PDE5 of 0.1ug/ml. The enzyme has a molecular weight of 50000 and has one active site. Calculate the turnover numbers for PDE5 with ...
*February 28, 2012*

**Natural Science **

Where do the shortest wavelenghts accur ?
*February 14, 2012*

**Chemistry**

A 25.40 g sample of water containing tritium,(3/1)H , emits 1450 beta particles per second. Tritium is a weak beta emitter, with a half-life of 12.3 yr. What fraction of all the hydrogen in the water sample is tritium?
*February 13, 2012*

**Chemistry**

A 50.6 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu). If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are...
*February 13, 2012*

**Chemistry**

Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. How many beta particles are emitted in 190s by a 3.10mg sample of Co-60? What is the activity of the sample in Bq?
*February 13, 2012*

**geometry**

I need help to graph the circle 4x^2+4y^2+16x-32y+71=0 Graph the circle
*February 12, 2012*

**Chemistry**

Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. How many beta particles are emitted in 190s by a 3.10mg sample of Co-60? What is the activity of the sample in Bq?
*February 12, 2012*

**Microbiology**

Please help me answer this question. Thanks a lots. Some Archaea have ATPases with different H+:ATP ratios. Assumes the delta Gp for ATP synthesis in one such organism is -518 mV. The minumum delta P required to generate ATP with a typical bacterial ATPase is about -173 mV. ...
*February 9, 2012*

**Math**

Solve each equation. 9n-3=7(n+3)+2n I got -24 is that right?
*February 8, 2012*

**Algebra II**

What is the simplified version of (2x^(-3)y^(2))^(-2) and (z^4)/(2z^3) Thanks!
*January 29, 2012*

**algebra**

what is 28 seconds over 2 minutes written in its simplest form
*January 28, 2012*

**APUSH**

how did huge industrial trusts develop in industries such as steel oil and banking, what was the effect on the economy?
*January 24, 2012*

**Physics**

A total of 8.0 joules of work is done when a constant horizontal force of 2.0 newtons to the left is used to push a 3.0 kilogram box across a counter top. Determine the total horizontal distance the box moves.
*January 16, 2012*

**ahsa math**

hey need help with this asap you are given 12 feet of fencing to build a cage how many different rectangle can you build? WHICH WOULD YIELD THE MAXIMUM AREA
*January 5, 2012*

**pre calc**

evaluate the trigonometric function of the given quadrantal angle. tan 1440° Evaluate without using ratios in reference triangle. sec 3π/4
*January 4, 2012*

**Chemistry**

What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a) potassium perchlorate b) cesium nitrate c) calcium iodide I don't need just the answers, I'm...
*December 28, 2011*

**calculus 2**

what is the polar area between r=5sinx and r=5cosx
*December 7, 2011*

**calculus**

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?
*December 1, 2011*

**psychology**

Suppose that you are dropping off at a large mall without money and merely wander around looking at stores and displays. Later, someone asks you were a particular store is located in the mall. The fact that you direct the person to the store indicates that ______________ has ...
*November 12, 2011*

**Math**

You are bending a wire to make a coat hanger. The length of the wire is 88 centimeters, and 20 centimeters are needed to make a hook hanger. The triangular portion of the hanger is an isosceles triangle. The length of one leg of this triangle is 3/5 the length of the base. ...
*November 1, 2011*

**Physics**

The wind exerts a force of 284 N North on a sailboat, while the water exerts a force of 132 N West on the sailboat. What is the magnitude of the net external force on the sailboat? Answer in units of N
*October 27, 2011*

**Physics**

The two cubes in the drawing are made from the same material. The radiant energy per second emitted by the small cube is 3.70 J/s. What is the energy emitted per second by the larger one?
*October 3, 2011*

**physics**

A car accelerates from rest at a constant rate of 2.2 m/s2 for 6.9 s. How far does the car travel in this time?
*October 3, 2011*

**Physics**

Well if you multiply the static and the kinetic friction and add gravity to it you get the minimum magnitude. PhD in Physics
*October 1, 2011*

**chemm**

find the density of ethyl alcohol if 80.0 cm^3 "weighs" 63.3g.
*September 27, 2011*

**chemistry**

find the density of ethyl alcohol if 80.0 cm^3 "weighs" 63.3g.
*September 27, 2011*

**physics**

509.7M
*September 25, 2011*

**Organic Chemistry**

What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
*September 7, 2011*

**Organic Chemistry**

What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
*September 7, 2011*

**Organic Chemistry**

What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
*September 7, 2011*

**chemistry (please help)**

Mass = Density x Volume M=1.11g/cm^3 x 26.5 liters Mass = 29.425 Kg
*September 6, 2011*

**Geometry**

m<RST =150, m<GST = x + 131, and m<RSG = x = 41. Find m<GST.
*August 29, 2011*

**algebra**

Who saw the brontosaurus enter the restaurant
*May 21, 2011*

**Biology**

True
*May 20, 2011*

**math Algebra I**

Perimeter of table top is 28 feet. The difference between 4 times the length and 3 times the wide is 21 feet. Find the dimension. (Use system of linear equations to solve.)
*May 13, 2011*

**social studies**

how geography influenced the expansion of greece?
*May 5, 2011*

**math**

what is 50% of 20
*April 28, 2011*

**math**

1 kg= g
*April 26, 2011*

**Essay evaluation**

Please grade my GMAT essay on 6 The author of the statement believes that the century old practice of using money in its physical form should be replaced by electronic accounts of credits and debits. Some people may argue that this practice is elitist and people of the lower ...
*April 18, 2011*

**Analysis of Argument**

Thank you for your help! :) Im not a native english speaker and havent written an essay . I would really like some inputs. :)
*April 16, 2011*

**Analysis of Argument**

Question: “According to a recent study, professional bodybuilders who used Train & Gain, a new protein supplement, over the course of three months experienced an increase in measured strength of up to 20%. Since Train & Gain is now available without prescription at all ...
*April 16, 2011*

**GMAT Essay- Analysis of issue**

In what ways can i improve this? more examples?
*April 16, 2011*

**GMAT Essay- Analysis of issue**

Please grade my essay on 6 Topic “Parents should not shoulder the full burden of their children’s college tuition. If university students are required to pay for at least a portion of their education, they will take their studies more seriously and, ultimately, ...
*April 16, 2011*

**GMAT Essay**

Thank you for your inputs :)
*April 15, 2011*

**GMAT Essay**

Hey All, Please rate my GMAT essay out of 6. The topic is “Of all the manifestations of power, restraint in the use of that power impresses people most.” Explain what you think this quotation means and discuss the extent to which you agree or disagree with it. ...
*April 15, 2011*

**Biology**

Need a more detailed picture of the sheep's pluck...lungs, trachea, and heart.
*April 12, 2011*

**Biology2**

Could you possibly give me a link to a more detailed picture? For example one that outlines each lobe and depicts more of the internal anatomy of the sheep's lung.
*April 12, 2011*

**Biology**

Where can a find a picture of a sheep's lung with labeled parts?
*April 12, 2011*

**science**

what was the altitude in degrees of the moon on 3/18/11
*March 21, 2011*

**chemistry**

what is the entropy change that occurs when 500g of water ice melts at 0 degrees celsius and 1 atm. the heat of fusin for water ice under these conditions is 6.01 Kj/mol.
*March 10, 2011*

**geometry**

I have a isosceles trapezoid question. The top line is 13" long, the sides are 60" long, and the bottom is 27" long. I do not know what is the equation or formula is to determine the acute angle between the bottom and sides or top and sides. Can you please let ...
*March 9, 2011*

**Chemistry**

How many grams of CH3COOH are present in 2.5^3 of vinegar. Also, what is the formula needed to solve? Thanks!
*March 5, 2011*

**Chemistry**

How do I find how many grams of CH3COOH are present in cm^3 of vinegar? Also, how many moles of CH3COOH are present in 2.5 cm^3 of vinegar? Thanks!
*March 5, 2011*

**math**

A computer costs $799. To add memory it costs $25 for 8 megabytes. How much memory can you add if you have at most $1,000 to spend.
*March 1, 2011*

**math**

Last year's computer model is on sale for $799. You can add more memory to the computer. Each chip of 8 megabytes of memory costs $25. How many megabytes of memory can you add if you have at most $1,000 to spend.
*March 1, 2011*

**math**

Last year's computer model is on sale for $799. You can add more memory to the computer. Each chip of 8 megabytes of memory costs $25. How many megabytes of memory can you add if you have at most $1,000 to spend.
*March 1, 2011*

**Math**

Because all of the tickets were square!
*February 24, 2011*

**geometry**

if ac = 2x + 13 and db =4x - 1, what is db
*February 21, 2011*

**Spanish -Please check 7th grade**

Please check my answers-I have to say where I just came from and what I have done using forms of venir and acabar de The post office Vengo del correo. Acabo de mandar una carta. The museum Vengo del museo de arte. Acabo de mirar el arte. The hospital Vengo del hospital. Acabo...
*February 7, 2011*

**Genetics**

Hi, I really need help in how to approach this question: A species of tiny antelope, known as the zephyr, has an XY system of sex determination, similar to mammals. Zephyr males have small antlers and females do not. The antlers can be two pronged (2-pr) or three pronged (3-pr...
*February 6, 2011*

**Math**

A computer costs $799. To add memory it costs $25 for 8 megabytes. How much memory can you add if you have at most $1,000 to spend.
*January 27, 2011*

**chemistry**

The pH of a solution is 6.0. Explain how the addition of the following substance would alter (or not alter) the pH of the solution. a. HCl b. NaOH c. H20
*January 24, 2011*

**Science**

The law of conservation of energy states that energy can neither be created nor destroyed. In many instances it may look as though energy is gained or lost, but it is really only changed in form. How is the law of conservation of energy represented when an archer shoots an ...
*January 5, 2011*

**Physics**

For Part B, do (340+200)/2=270 rpm to find the average rpm during acceleration. Then divide this answer by 60 seconds to find the average revolutions per second during acceleration 270/60=4.5 rev/sec. Multiply this answer by the amount of seconds it takes for it to accelerate ...
*December 11, 2010*

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