Questions Asked on
May 31, 2007

math
5. A rubber ball dropped on a hard surface takes a sequence of bounces, each one 3/5 as high as the preceding one. If this ball is dropped from a height of 15 feet, what is the total distance it has traveled after it hits the surface the fifth time? The
asked by Fidelia 
ionic equations chemistry
Li2CO3+HBr> I don't know what you want. Li2CO3 + HBr ==> LiBr + H2O + CO2 You will need to balance it Li2Co3+2HBr>H2Co3+2LiBr then you seprate Li(aq)+1 + Co3(aq)+2 + 2H(aq)+1 + 2Br(aq)+1 > H(aq)+1 + Co3 (aq)+2 + 2Li(aq)+1 + 2Br(aq)+1 then cancel out
asked by jessica 
Physics
A 0.13 kg meter stick is held perpendicular to a wall by a 2.6 m string going from the wall to the far end of the stick. (a) Find the tension in the string. _________N (b) If a shorter string is used, will its tension be greater than, less than, or the
asked by Jeannine 
Chemistry
Does the reaction between CO2(g) + Mg(OH)2(aq) produce MgCO3(s) + H2O(l) or Mg(HCO3)2 ??? Normally, Mg(CO3)2 but I suspect an excess of CO2 will produce the bicarbonate. For example, CO2(g) + Ca(OH)2(aq) ==> CaCO3(s) + H2O(l) and that is often done by
asked by Fiona 
Chemistry
Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^5 This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for
asked by Raj 
French
hi there!! I am looking for a number of good websites to practice my french on... mainly on the verbs and tense, so any sites with quizzs (with answers) would be great! oh and i am having my french exam in a week;written,comprehension, listening, and oral.
asked by Pauline 
physics
A 64.0 kg person stands on a lightweight diving board supported by two pillars, one at the end of the board, the other 1.20 m away from the end. The pillar at the end of the board exerts a downward force of 829 N. How far from the pillar at the end of the
asked by micole 
MATH
PLEASE HELP ME! I'm not a math student and this is very hard for me. I'm a History Major *shy face* I am not a Math student whatsoever :S this is in my Geography course and I'm very confused can anyone help me out? Imagine that a woodlot 2x3km in size has
asked by Oz 
Algebra
Let A and B be n x n matrices, assume AB is invertible and show that both A and B are invertible. what? AB is invertible > There exists a matrix X such that: (AB)X = 1 But (AB)X = A(BX). So, AY = 1 for Y = BX Also: X(AB) = 1 And thus ZB = 1 for Z = XA
asked by Ashley 
chemistry
How many grams of C6H12O6 need to be dissolved in 350g of water vto have a solution which freezes at 2.50 degrees celcius? delta T = Kf*m You know Kf, m = molality = mols/kg and mols = grams/molar mass, delta T is 2.50. Solve for grams. Post your work if
asked by jessica 
Physics
A 3mf capacitor and a 5mf capacitor are connected in parallel to a 16v battery. a) What is the equivalent capacitance of the connection? b)What is the voltage drop across each capacitor? c)How much charge is stored on each capacitor? and d) What total
asked by Ella 
chemistry
A solution of ethanol in water boils at 101.5 degrees C. what it tne molarity? Can you show me the setup i would use?? I did the first time you posted this problem. delta T = i*Kb*m delta T = 101.5  100 = 1.5 i = 1 kb = 0.51 m = ?? m equals molarity i
asked by jessica 
chemistry
how many grams of CaCl2 need to be dssolved in 100g of water to prepare a solution which freezes at 2.0 degrees? Work this problem just like the previous one EXCEPT there is another part to the formula. Delta T = i*Kf *m i is the number of particles and
asked by jessica 
social studies
Who manages the natural resources of Australia? http://www.google.com/search?q=australia+manager+natural+resources&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA =)
asked by Emma 
social studies
What are some problems or controversies regarding the use of the mineral silver? Check this article for the many uses of silver, including in alternative medicine. http://en.wikipedia.org/wiki/Silver#Folklore_and_mass_culture
asked by Emma 
algebra
find the value of x and y x+y=12 45x+52y=561 Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
asked by jennifer 
algebra
find the value of x and y x+y=12 45x+52y=561 a sporting goods store sold right hand and left hand batting gloves.12 were sold in a one month period for $561.right handed gloves are $45 and left handed gloves are $52.how many of each were sold? please show
asked by jennifer 
Philosophy
Is a person more than a physical body? What is the mind? What is thought? I am having trouble finding information on pricipal issues,some philosophies related to the questions and some misconceptions about the questions. If anyone could help me. I really
asked by Marie 
Physics
Draw the figure. You have the following equations that you can write: a) Sum Vertical Forces=0 b) Sum horizontal forces=0. Remember that at the upper part of the ladder, there is a horizontal force (only). c) Sum of moments about any point, I suggest the
asked by bobpursley 
algebra 2
divid 4/x^7 by 12/x^5 I got this far but Got lost can some help me 4/x^7*x^5/12= I know the 4 and the 12 will go down to 1 and 3 but what am I suppose to do with the x^5 and x^7 Right. The 4/12 reduces to 1/3. X5/X7 = 1/X2. So the answer is 1/3X2. Hi. I
asked by CINDY 
Chemistry
Calculate the pH of a solute where 24.5 mL of 0.1 mol/L HCl is added to 25.0 mL of 0.1 mol/L NaOH. How much excess OH is there? .5ml .1M or 5E5 moles. That is in a volume of 49.5ml So if OH concentration is that moles/volume, what is the H+ concentration?
asked by Raj 
Physics
The electric field between two charged plates is 2000N/C. What is the voltage difference if the plates are separated by a distance of 1.0 x 10^4 m? I know that the answer is supposed to be .2 volts but I have no idea what formula to use??? can anyone
asked by Ella 
math
how would I write 145% as a fraction? it would be 145/1000 could you by any chance help me with my question it is between luke and dogauls question thanks Julie is incorrect 145/100 reduce to 29/20
asked by Amber 
math
If $7,800 is depostied into an account paying 6% interest compounded annually ( at the end of each year), how much money is in the account after 2 years? How would I set this up? Use the formula at this site: (Broken Link Removed) I did not understand
asked by Stacey 
analogies
I have to do 20 analogies every week for spelling homework. They are hard to do sometimes. I only have 2 more and if you could help me that would be great. bounty:austerity::rife: parochial, overt, sparse, precarious, sultry too holy:sanctimonious::too
asked by Morgan 
math
how do i do long division? This web site may help you. http://www.coolmath4kids.com/longdivision/longdivisionlesson1.html dont listen to drbob222
asked by Rachel 
Math
say you have 4/13 and the decimal equivalent to it is 30.76923 how do I round 3 decimal places? you round 2 da thousandths. For example since the decimal u hav is 30.76923, round it to the last three numbers after the decimal point. So 30.76923 would be
asked by Amber 
algebra
List the like terms in the following group of terms. –7u, 4tu2, 4t2u, –5tu2, 7tu2, 6t2 did I do this correct? (4tu² + 7tu² + 5tu²) + 4t²u +6t² +7u It should be... 6t^2 + 4t^2u + 7tu^2  7u how come you don't use the 4tu^2 oh i am sorry...it
asked by did I do this correct/ 
Math
Did I do this right? A cage with a volume of 27 cubic meters, if the sides are in whole meters only and the width is 3 meters, what are the possible dimensions for the length and height? 27=3X3X3 or 27=9X1X3 Yes. Your answers are correct.
asked by Sam 
History
Hi, I need some help with this question: It is 1789 .....You are an educated member of the bourgeoise....You listen to the thinking of the philosophes and the physiocrats in the salon and you read what they say in the daily news...... WHAT DO YOU THINK IS
asked by Jai 
economics
What are the advantages and disadvantages of using a credit card? The good: Don't need to cary cash. Can buy needed goods on credit when you otherwise wouldn't be able to. The bad: Usually you pay high interest until the balance is zero. Most people are in
asked by chrissy 
algebra
Okay, I was taught that if a geometric series is infinite and it diverges then it has no limit and no sum. Looking back in my notes, I found an example of finding the value for a divergent series? Is this possible? The sum of an infinite geometric
asked by Jane E. 
Technology
We are working on current advances in technology. I need to find out some info. for extra credit that is mandatory. One of the things I need to find out is: 5.)Tell whether or not you can get a account on iTunes without giving out a credit card number. My
asked by anonymous=) 
citation
does anyone know how to internally document a source from an anthology not a book in MLA format? This site will give you the MLA FORMAT. Go down to the part on Anthology documenting. (Broken Link Removed) I am asking you about the internal documentation
asked by Anonymous 
History
who was the Chinese philosopher that taught the importance of good moral character and take responsibility for their society? Confucius
asked by ABC 
math
10. Sales of televisions grow at a rate proportional to the amount present (t is measured in days). (a)Set up a differential equation to model this problem. (b)Solve the differential equation if at t = 0, there are 20 televisions sold and after 3 days,
asked by dougal 
chemistry
A solution of ethanol in water boils at 101.5 degrees C. what is the molarity? delta T = i*Kb *molality. Delta T = 101.5  100 = 1.5. i = 1. I should comment here that the freezing point constant and the boiling point contant works with a nonvolatile
asked by jessica 
algebra
please write an explaination why (x^3)(x^4) is not x^12. I am confused thank you. it is not the answer because, first of all, try replacing x with another number, in this case, let's say two. (2^3)(2^4)= 128, and if you try 2^12, you do not get 128,
asked by jessica 
social studies
How is silver harvested in Australia? Silver is not "harvested." It's "mined." http://www.google.com/search?q=australia+mining+silver&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA
asked by Emma 
Computer science (Java programming)
Why are the use of GUIs and graphics beneficial in programming? Try writing with and without them and write your feelings about each. Then pick out the benefits of GUIs and write about that. Matt
asked by Mo 
algebra
find the value of x and y x+y=12 45x+52y=561 a sporting goods store sold right hand and left hand batting gloves.12 were sold in a one month period for $561.right handed gloves are $45 and left handed gloves are $52.how many of each were sold? Please only
asked by jennifer 
Biology: growth hormone
Could someone tell me the physiological effects of growth hormone Thank you for using the Jiskha Homework Help Forum. Here are a few sites on the growth hormone: 1. http://www.quackwatch.org/01QuackeryRelatedTopics/hgh.html 2.
asked by bonita 
geog
Can you please give me a short definition of the Canadian foundation against hunger (FCCF), and the Canadian agency of international development (ACDI)? please:) FCCF:
asked by Student 
Philosophy
1. Watch out for metaphysics in searching for these answers: metaphysics depends on a magical intrepretation. 2. This link will get you started on these classical questions.
asked by bobpursley 
algerbra
find the slope of any line perpendicular to the line through points (0,5) and (3,4) would I be right y=1/12 No. What is the slope of the line through those points? 9/3 ?What is the negative reciprocal of that? 9/3? Goodness, 9/3 is 3. What is the
asked by patti 
history
a vast, flat plain that extends across central australia____________. This may be what you need: http://en.wikipedia.org/wiki/Outback
asked by may 
Math
look at the chart out of 150 dog owners 75 perfer human food only,45 perfer pet food only and 30 perfer both human and pet food. So what percent of dog owners reported their dog likes either only human food or only pet food? P(human food) = 75/150 = .5
asked by Julie 
Math
look at this other chart 36 of 200 cat owners prefer human food only, 116 out 0f 200 perfer pet food only,48 out of 200 pet owners perfer human and pet food so what percent of cat owners repoter that their cats liked either human food or pet food only.
asked by Julie 
Math
Hi how would i solve this?? The equation of the cirlce is x^2+y^24x+2y=0. Determine the coordinates of the center and the radius of the circle. What do i do? anyone
asked by Luke 
englise
i need help with home work and i don't know what some of the stuff means i can Help tatiana i got an A in english Please ask specific questions and include what you think the answers might be. Someone here will be happy to help you. =)
asked by tatiana 
Bio
What are some human activities which might cause oxygen levels in the atmosphere to drop dramatically? Read this: http://www.ecology.com/drjacksnaturalworld/mostimportantorganism/index.html Then ask what would happen if we poisoned off the algae. This
asked by help 
physics
Why is it impossible for a skier to reach maximum speed that is physically possible by converting the change in height to speed? what is this question asking? Some of the potential energy available is lost due to friction. Friction on the skis, friction on
asked by Sam 
Algebra
Joshua originalle bought two hundred shares of stock three years ago. The company has since had a 2 for 1 stock split. Joshua's entire investment in stock has increased in value by 20%. He originally paid $8,600 for the stock. What is the current price per
asked by Sue 
History Question
I am writing a paper on Thomas Crapper, the alleged inventor of the flush toilet. However, in my research, I've discovered that many scholars believe that Crapper was falsely creditted with the invention of the flush toilet, and that the real inventor was
asked by Salim