# Questions Asked onSeptember 15, 2006

1. ## Chem

What is PbCO3(s)-->PbO(s)+CO2(g) A. neutralization B. metathesis C. combustion D. decomposition E. combination Looks like the lead carbonate is decomposing to lead oxide and carbon dioxide to me. check my thinking.

2. ## Math

A farmer was taking her eggs but they all fell on the floor. She didn't know how many eggs she had. But then she remembers when she put them in groups of two, there was one egg left over. When she put them in groups of three, there was also one egg left

3. ## music

how can i get better at piano without a teacher? It's the same answer as the New Yorker responded to this question: "How do I get to Carnegie Hall?" The answer: "Practice, practice, practice."

4. ## English

Has anyone read "on the pulse of the morning"? If somebody has, please tell me the poet's visition of america and american dream. Please read over the poem as if you weren't reading a poem -- that is, don't stop and pause at the end of every line. Read it

5. ## math

can anyone help me with these 3 problems I am trying to check my daughters hoime work it has bee na few years. 1. The sum of n and twenty -two, multiplied by three, is 78 2. the product of z and 17 is less than or equal to the difference of twenty -one

6. ## Mathematicz!!!!!

Alex took 1/4 bottle of milk for his breakfast. What part of the milk was left if he drank 1/2 of the remaining milk for his snack? So he drank 1/2 of 1/4 bottle? And he started with 1/4? left = started - drank = 1/4 - 1/2 * 1/4 I think the problem reads

7. ## economics

I really have to figure out the answers to these questions and i don't know where to start. I don't know how to draw the marginal benefit and marginal cost curves for this question. a.Sketch a marginal benefit and marginal cost diagram, with â€œbillions of

8. ## Technolgy

Can you define technology in a way that middle school studentts will understand the meaning and the process? I like the dictionary definition: A practical application of science in commerce and industry. You will have to teach what practical, application

9. ## Barshney

Why do you think it's important to find and use creditable sources in your written work? Would you take your worse enemy's recommendation for a blind date? Information we use is as only good as the sources. My wife is very sick these days, in treatment for

10. ## child care

a childs development is affected most by? I am not an expert, there are some of those around. The following is based on my experinece as a teacher and parent: 1) Genetics 2) Early childhood nuturing (touching, stimulation, holding, talking to, etc) 3)

11. ## p.e

how can I stay but still eat junk food????? You can stay healthy by eating mostly healthy foods and much smaller amounts of junk food. That depends upon how much junk fund you want to eat. In general, however, eating junk food and staying slim (I suppose

12. ## p.e.

i need a picture of a basketball court. Thank you for using the Jiskha Homework Help Forum. At "Basketball-goals.com" you will find dimensions, stencils, etc. You could always google it in Google images

I went back made the suggest changes. I will go back and add more specfic examples of traditions before I turn my final paper in. I need this asap (before Sunday) Thanxs for your help! Who Is An American?

14. ## math

how do you add and subtract + and - numbers? Is there a rule? Yes. The adding rule is this: If the signs are the same, add the numbers directly, then use the sign of the numbers. If the signs are different, Subtract the smaller from the larger, and use the

15. ## chemistry

If 100. g of iron at 100.0 C is placed in 200. g of water at 20.0 C in an insulated container, what will the temp, C, of the iron and the water ( C value is 4.18) when both are at the same temp? The specific heat of iron is 0.444 KJ/Kg C ---- steps would

16. ## environmental science

what causes salinization? Poor drainage, semi-arid or arid region of the world, water table 2-3 meters from the surface are some of the reasons. You can go to www.google.com and type in salinization. There are a number of articles there worth reading. need

17. ## geometry

I don't really understand the whole idea of Flow Charts. Can someone explain them to me? My geometry teacher doesnt do a good job explaining it. I don't understand the book either Since this is not my area of expertise, I searched Google under the key

18. ## Chemistry

Calculate the work done when 70.0g of tin dissolves in excess acid at 3.00 atm and -15.0 C. Sn(s)+2H^+(aq) -> Sn^2+(aq)+H2(g) Assume ideal gas behavior. Any ideas? I've come up with a few different answers and can't come to a conclusion. I see the

19. ## Science

Why is it important to examine the unnumbered marks on a graduated cylinder before making a reading between the unnumbered lines? I'm not sure of the question but I'll take a stab at it. It must be to avoid parallax; i.e, you want the eye level with the

20. ## Physics Mathematics

do we have to have the same amount of significant numbers in the values we got by convertion? No. Your conversion factors may have some lack of precision. Examples 60sec=1min infinitely precise, a definition. 1.6km= 1mile two sig figures, because the mile

21. ## Science

I'm struggling on science, too. What is the element used for? There are more than 100 elements. To which element do you refer? Which element? Please read the fowwowing site: http://en.wikipedia.org/wiki/Chemical_element alminum. http://www.webelements.com/