Wednesday

February 10, 2016
Total # Posts: 1,933

**Physics**

An ice skater, hasa rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. Her rotational inertia then undergoes a change to 2 kg m2. Which of the following is true? a. Her angular momentum remains the same b. Her angular velocity increases c. Her kinetic energy increases ...
*April 30, 2009*

**Physics**

so its A then right
*April 30, 2009*

**Physics**

An ice skater, has a rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. She then changes her rotational inertia to 2 kg m2. What is her final angular velocity? a. 4 rad/s b. 2 rad/s c. 2.8 rad/s d. 8 rad/s I say B, am i right?
*April 30, 2009*

**Physics**

There is a net net torque that is applied to a rigid object. What happens? a. the angular momentum of the object will change b. the kinetic energy of the object will change c. the object will experience an angular acceleration d. the rotational inertia of the object will ...
*April 28, 2009*

**Physics**

The Angular momentum of an object that spins is determined by a. the rotational speed b. the mass of the object c. the choice of the axis of rotation d. all of the above I say d based on the fact that momentum =r*p where p is mv and r takes into account the axis
*April 28, 2009*

**Physics**

A diver jumps off a dving board and does a twisting manuever. In the midst of his jump in the air, the diver cannot change his a. Rotational Energy b. Rotational Speed c. Rotational Inertia d. Angular momentum I say d just want to make sure
*April 28, 2009*

**Physics**

A wheel spins on a horizontal axis, with an angular spped of 140rad/s and with its angular velocity pointing east. Determine the magnitude of the angular velocity after an angular acceleration of 35 rad/s^2, pointing 68 degress west of north, with a time of 4.6 seconds. I ...
*April 23, 2009*

**Physics**

A wheel spins on a horizontal axis, with an angular spped of 140rad/s and with its angular velocity pointing east. Determine the magnitude of the angular velocity after an angular acceleration of 35 rad/s^2, pointing 68 degress west of north, with a time of 4.6 seconds. I ...
*April 23, 2009*

**Inorganic chemistry**

Complete and balance the reaction, Mno4-(aq) + C2O4- = MnO2(s) + Co3^2-(aq)
*April 14, 2009*

**Chemistry**

IN my experiment, I was doing a qualitative analysis of Group I and II anions using a flowchart. IN the chart I added 5 drops of 0.1M AgNO3 and several drops of 3M HNO3 to 5 drops of solution and found that a precipitate was formed. Thus it was classified as a Group I anion. ...
*April 12, 2009*

**Chemistry**

The experiment that I did in lab consisted of performing a qualitative analysis of group 1 and 2 cations and anions. The first thing that I did was to add 5 drops of 3M HCl, centrifuge it, and to observe whether a precipitate would form. It did and in the flowchart it ...
*April 12, 2009*

**chemistry**

What would be the advantages and disadvantages of using tribasic sodium phosphate (aka trisodium phosphate) to soften water by removing calcium ions?
*April 12, 2009*

**Chemistry**

What is going on in the hexane layer at the end of the Group I anion experiment? (when color of hexane layer is yellow you have Br- and when it is brown or purple you have I-.) please explain
*April 12, 2009*

**math**

63% of 105$
*April 2, 2009*

**Pre Cal.--Check my work?**

Solve the system of equations: x - y - z = 2; x + 2y - 2z = 3; 3x - 2y - 4z = 5? well, you have: 1- x-y-z=2 2- x+2y-2z=3 3- 3x-2y-4z=5 multiply both sides of the equation 1 by 2: x-y-z=2 ===> 2x-2y-2z=4 add this by equation 2: 2x-2y-2z=4 x+2y-2z=3 ==> 3x - 4z = 7 (*) now...
*March 30, 2009*

**Accounting**

Give an example of the following tranactions •Increase an asset and increase a liability. •Increase one asset and decrease another asset. •Decrease an asset and decrease owner's equity. •Decrease an asset and decrease a liability. •Increase an ...
*March 27, 2009*

**Adv. Math.**

Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots
*March 26, 2009*

**English**

hey, I am trying to write an essay for my university english class but I cannot find any good literary criticism databases. I went to mla international bibliography but couldn't find anything. I am trying to write an essay on the Fall of american dream for Of mice and men ...
*March 19, 2009*

**MATH**

Find the periodic withdrawals for the annuity of $400,000 at 4%, paid out monthly for 16 years. (Assume end-of-period withdrawal and compounding at the same intervals as withdrawal. Round your answer to the nearest cent.)
*March 11, 2009*

**MATH**

Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
*March 11, 2009*

**MATH**

Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
*March 11, 2009*

**MATH**

Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
*March 11, 2009*

**math**

Convert all the fractions so that they all have the same denominator (the number below the line). That way, you can tell how big they are relative to one another just by looking at the numerator (the number above the line). (#1.) 2/5, 1/10, and 3/20 can all be converted so ...
*March 11, 2009*

**Math**

Two old watches were found. Both watches were set for the current time. Forty-five minutes later one old watch was 1 minute ahead and the other old watch was 2 minutes behind. The next morning one watch read 7am and the other read 6am. At what time were the two old watches set?
*March 11, 2009*

**Math**

1) Figure out number of grams of silver 3 kilograms X 1000 g/kilogram= 3 X 10^3 grams 2) Figure out number of atoms in 3X10^3 grams of silver 3 X 10^3 grams X 5.58 X 10^21 atoms/gram = 16.74 X 10^24 atoms or 1.674 X 10^25 atoms
*March 10, 2009*

**Anatomy**

How do we perform complex actions that apparently require no thinking?
*March 10, 2009*

**math**

I think i misunderstood the question.. is it just 1080 - 896
*March 10, 2009*

**math**

Suppose that a college admissions office needs to compare scores of students who take the Scholastic Aptitude test(SAT) wit those who take the american college test (ACT). Suppose that among the college's applicants who take the SAT, scores have a mean of 896, and a ...
*March 10, 2009*

**MATHEMATICS**

Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
*March 9, 2009*

**math**

Find the periodic payments necessary to accumulate $20,000 in a sinking fund paying 4% per year, with monthly payments for 5 years. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
*March 9, 2009*

**math**

When I was considering what to do with my $10,000 Lottery winnings, my broker suggested I invest half of it in gold, the value of which was growing by 10% per year, and the other half in CDs, which were yielding 3% per year, compounded every 6 months. Assuming that these rates...
*March 9, 2009*

**MATH**

do u tutor me for my nys test
*March 9, 2009*

**Mathematics**

Oh, these are the variable inputs. d=deposit each time period i=rate per time period n=number of time periods
*March 8, 2009*

**Mathematics**

My teacher gave us this equation, and I can't remember how to use it. It's for Simple and Compound Interest. Future Value=d[((1+i)^n-1)/i] d=deposit each time period i=rate per time period n=number of time periods
*March 8, 2009*

**texas state**

draw a supply curve for an ice parlor switching production from ice cream to yogurt.
*March 5, 2009*

**ALGEBRA 1**

the equation that passes through the given point and is parellel to the point (2,-3);2x+y=5
*March 4, 2009*

**english**

who are the two main characters in the story
*March 3, 2009*

**Probability/Statistics**

Two independent events, A and B, satisfy Pr(A) = 0.6 and Pr(B) = 0.3. In the case of Pr(A or B), why isn't the answer 0.3? We are looking at the probability of A or B. I choose B. Thank you!
*February 24, 2009*

**Math**

antiderivative of (x-2)/(x-1)
*February 23, 2009*

**Marcoeconomics**

And is the bond price=face value?
*February 17, 2009*

**Marcoeconomics**

if Bond price= the discounted value of all the future income it will generate then does it mean that the buyer of the bond earn nothing? Because he in fact need to pay the discounted value of the future income(interest) which is said to be earned by him when buying the bond. ...
*February 17, 2009*

**Marcoeconomics**

My logical deduction is: asset demand for money + transaction demand for money= money demand=supply of bond(as bond issuers create supply of bonds)
*February 15, 2009*

**Marcoeconomics**

According to the formula, Bond price= y/r so bond price has a inverse relationship with interest rate.i.e. interest rate increases, bond price decreases. But why does it contradict with this demand-supply anysis: r(interest rate increases)--> returns from buying bonds ...
*February 15, 2009*

**Reiny! Reiny! Reiny! Answer Check and HW Help!**

3) Answer (12, 28) 4) Answer (4, 22)
*February 12, 2009*

**Engineering**

Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of steel ...
*February 12, 2009*

**Engineering**

5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of ...
*February 12, 2009*

**Engineering**

Thanks bob mind helping me with one more? The questions all ready posted, same subject.
*February 12, 2009*

**Engineering**

Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.
*February 12, 2009*

**chemistry**

a 16.2 L sample of CO(g) at 1.50 atm and 200.*C is combined with 15.39g of Fe2O3(s), How many moles of CO(g) are availabe for the reaction
*February 11, 2009*

**AP Calculus**

how do you evaluate integral of [lxl] from (0,2) , a step function. would you just do it as if it were a absolute value and then do two different integrals?
*February 10, 2009*

**Calc**

find the area between y=x^3–14x^2+45x and y=–x^3+14x^2–45x i am having trouble how the graphs look like and how to do this...
*February 4, 2009*

**chemistry**

.77
*February 2, 2009*

**statistics**

The questioner doesn't want the weighted mean, she wants the mean of the difference. This is equal to the difference between the means, or 0.12.
*January 30, 2009*

**Math**

You have a mean score of 86 on 9 quizzes. The teacher decides to drop your lowest quiz score to determine your final quiz mean. After dropping the lowest score, your mean score on the 8 remaining quizzes is 88. What score was dropped?
*January 29, 2009*

**the novel "Ordinary People" by Judith Guest**

Has anybody read this book? I have a few questions to ask, I've read the book but forgotten a few things reply ASAP!
*January 28, 2009*

**Physics**

(a)M.A=2 (B)F=186.6N(C)MASS=20KG,W=173N
*January 21, 2009*

**accounting**

Are condominiums taxable or exempt
*January 14, 2009*

**12th grade English**

A Lesson Before Dying- Quotations Analysis. " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how they taked about ...
*December 2, 2008*

**Finance-options**

this was an exam question...i answer for a) long call option b) long put option. But i got it wrong, the instructor won't tell us the answer, he wants us to figure it out ourselves. But i just don't know. Any guidance would be helpful.
*December 2, 2008*

**Finance-options**

I need help on the following question. Suppose that you are the manager and sole owner of ahighly leveraged company. All the debt will mature in one year. If at that time the value of the company is greater than the face value of the debt, you will pay off the debt. If the ...
*December 2, 2008*

**Chemistry**

thanks a lot !!!
*November 30, 2008*

**Chemistry**

Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-...
*November 30, 2008*

**Chemistry: ketone and aldehydes**

Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-...
*November 29, 2008*

**Chemistry**

Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-...
*November 29, 2008*

**French**

Please correct the verb tenses in the following paragraph Alceste, le gros copain de Nicolas, se passionne pour la nourriture. Chaque fois qu’il sort avec ses amis il a envie de manger. La semaine dernière ses amis et lui ont décidé d’aller au ...
*November 19, 2008*

**Financial management**

evaluates investment opportunities using payback. The finance director who has been with the company since its formation in 1975, has recently heard that this method may not be the best for evaluating long term projects. You have been brought in to advise the company and have ...
*November 18, 2008*

**English**

Leaving Home(the play)proves that the family structure is by far the greatest cause of people's social dysfunctioning. say why you agree or do not agree with this statement.
*November 11, 2008*

**math help me**

sorry because of misunderstood of the question. The above answer is wrong
*November 9, 2008*

**math help me**

case 1 : both bottle give red balls 1/2 * 1/2 = 1/4 case 2 : one bottle gives red ball 1/2 * 1 =1/2
*November 9, 2008*

**chem**

methanoic acid react with potassium dichromate to form what? A colorless solution and CO2 is formed as known
*November 9, 2008*

**math**

Find the first and third quartiles, Q1 and Q3, of the following set of numbers. 14, 4, 13, 18, 8, 15, 8, 3, 11, 8
*November 6, 2008*

**math**

-1/2- (-5/8)=
*November 5, 2008*

**math need help please**

-9 to the 2nd power - (-6) to the 2nd power
*November 5, 2008*

**Pharmacy Math**

The dose of gentamicin sulfate is 1.7mg/kg. How many mls of an injectable solution containing 40mg/ml should be administered to a person weighing 220 pounds? Any help is appreciated.
*November 3, 2008*

**Pharmacy Technician**

A physician prescribed 5mg/kg q day of a drug for a patient that weighs 132 pounds. How many 100mg tablets will be needed for a 2-week prescription?
*November 2, 2008*

**Need Help on this Microeconomics question, really**

If firms in perfect competition all pay the same price for resources and all receive the same price for outputs, how can they have different total profits or different profits per unit sold?
*November 1, 2008*

**Math**

Make up a data set of at least 12 numbers that have the following landmarks. Maximum : 18 Range : 13 ___________________________________ ___________________________________ ____ mode: 7 median: 12
*October 27, 2008*

**seventh grade science**

Thank you!
*October 25, 2008*

**seventh grade science**

Thank you. I looked it up in a dictionary, but I do not understand the terminology. Can you please explain it in a simpler language? Thank you.
*October 25, 2008*

**seventh grade science**

what is a monomer what is a polymer what is the structure of a protein
*October 25, 2008*

**Need examples of variable and fixed inputs (micro)**

I just need some example of fixed and variable inputs.
*October 24, 2008*

**Math**

Imagine there are 100 lockers. Each locker is given a number 1-100. When the students are assigned to their lockers, the 1st student runds down the row of lockers and opens every door, student #2 closes the doors of locker #'s, 2,4,6,8, etc. to the end of the line. Student...
*October 23, 2008*

**Microeconomics help please (urgent)**

True or False? Explain your reasoning. a. The short-run average total cost can never be less than the long-run average total cost. b. The short-run average variable cost can never be less than the long-run average total cost. c. In the long run, choosing a higher level of ...
*October 22, 2008*

**8th grade**

I went to an unscramble a word site and came up with this "Zach's Word Unscrambler" Results The scrambled word you entered was "afsedrniru " ... Sorry, No Matches Were Found...
*October 15, 2008*

**Microeconomics (margin Utility) need clarification**

Someone was kind enough to help me with this question, but i was still confused on how they helped me with the first part of my question. The original question was: You go to an auction and set a maximum price of $100 you are willing to bid on an item. However, you are ...
*October 15, 2008*

**Microeconomics help please (urgent)**

Thank you. I will remember the advice in the future:)
*October 15, 2008*

**Microeconomics help please (urgent)**

You go to an auction and set a maximum price of $100 you are willing to bid on an item. However, you are fortunate and purchase it for $50. 1) Does the lower price alter the marginal utility you originally placed on the item? 2) Is your potential total utility increased ...
*October 15, 2008*

**Math**

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of the choices a.) -161/...
*October 12, 2008*

**Formula help**

This is a multiple choice question and I am not getting any of the choices a.) -161/8 b.) 120/7 c.) 161/7 d.) -17
*October 12, 2008*

**Formula help**

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem?
*October 12, 2008*

**Help**

Now solve for speed of wind in the first equation.. 33km/time=32km/hr-speedwind. How do I do that?
*October 12, 2008*

**Physics**

You should start by listing the given information. vi = 0 vf = 100 m/s t = 12.5s a = (vf-vi)/t A). a = (100m/s - 0m/s)/12.5 s a = 8.00 m/s^2 B). You can use several equations for this question. I'm going to use: d = (vf + vi)/2 * t. d= (100m/s + 0m/s)/2 * 12.5 s d= 625m C...
*October 7, 2008*

**o-chem**

explain how the rate of crystal growth can affect the purity of a recrystallized compound
*October 7, 2008*

**o-chem**

explain how the rate of crystal growth can affect the purity of a recrystallized compound
*October 7, 2008*

**o-chem**

well im confused because you said one needs to be great and the other has to be poor. so if you combine both do you get a great solvent or a horrible one?
*September 29, 2008*

**o-chem**

thanks. i understand why e won't work, but im a little confused on choice a. they both dissolve a wide range of solutes so would it be a great solvent?
*September 29, 2008*

**o-chem**

Explain whether or not each of the following pairs of solvents might be useful as a solvent pair for recrystallization. (a) ethanol-methanol (b) hexane-cyclohexane (c) acetone-ethanol (d) water-ethanol (e) water-cyclohexane
*September 29, 2008*

**O- chemistry**

During a recrystalliztion experiment, a student allows the hot solution to cool to room temperature, then chills the solution in an ice bath. Is the student using correct recrystallization technique? Why does the student not simply chill the hot solution in an ice bath initially?
*September 29, 2008*

**AP US History**

1775 to 1800
*September 24, 2008*

**Re**

i need to find eveidence of 3 things that jesus did and 3 things jesus didn`t do. thanks!
*September 22, 2008*