Questions Asked on
October 10, 2006

science
sometimes scientists make a mistake, or ?, and need to do an experiment again or the data is not as expected, and need....

PreCalculus
The formula D= 5e ^0.4h can be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. When the number of milligrams reaches 2, the drug is to be administered again. WHat

Calculus
If 6 J of work is needed to stretch a spring from 10cm to 12 cm and another 10 J is needed to stretch it from 12 cm to 14cm, what is the natural length of the spring? This is a physics problem as much as a calculus one. Solve for the spring constant k

Geometry HELP!!!
What happens to the graph of the line y = 3x 2 when the equation is changed to y = 3x +6? What happens to the graph of the line y = 2x  5 when the equation is changed to y = 5x + 6? On the first question: What happens to the graph of the line y = 3x 2

physics
What are the horizontal and vertical components of a cat's displacement when it has climbed 5m directly up a tree? Has it moved horizontally when it gors directly vertical?

world civilization
why were river valleys vital to the development of civilization why were river valleys vital to the development of civilization It is diffiult to farm on the hilltops or sides of hills. Valley are where the water is, the soil is, and the moderate

MATH HELP!
I HAVE 19 COINS TO MAKE A DOLLAR. THE COINS ARE 9 DIMES AND 10 PENNIES. THE NEXT PROBLEM SAYS USE HALF AS MANY DIMES AS PENNIES STILL MAKING A DOLLAR WITH 19 COINS. SOMEONE PLEASE EXPLAIN BECAUSE I REALLY DON'T UNDERSTAND!!!!! THX PLEASE JUST EXPLAIN WHAT

hirsch funnel filter paper
I used a filter paper that was too large for the Hirsch funnel and had to fold it up around the edges. Why is it bad to fold the edges of the paper? One reason is that it is difficult to "seal" the paper for a proper vacuum to be pulled. Another is that

ENGLISH
WHICH IS THE CORRECT SENTENCE? STAY TUNE FOR MORE IN INFORMATION. OR STAY TUNED FOR MORE INFORMATION. The second sentence is correct. Stay = command verb (understood subject) tuned = past participle used as an adjective  predicate adjective. =)

Pre Calculs
The pH of a chemical solution is given by the formula pH = log10 [H+] where [H+] is the concentration of hydrogen ions in moles per liter. Values of pH range from 0 (acidic) to 14 (alkaline). (a) what is the pH of the solution for which [H+] is 0.1? (b)

science
Two bumper cars collide. Both cars stop. How do you know that a force has acted on both cars? did the cars change velocity? (yes, they stopped). Newton's law says that things in motion will stay in motion unless a xxxxx acts.

social science
Is iot possible to find out the number of physicians in a given practiceper state? example: how many doctors have a practice in geriatrics in the state of Utah? http://www.amaassn.org/cgibin/sserver/datalist.cgi I found it by state and county, but not

Calculus problem
I really need help on this question. A goldsmith makes a wedding band by taking a gold ball and drilling a wide hole through it. The wedding band has to be 1 cm wide and the hole has to have a diameter of 2 cm. Given that gold weighs 19.32g/cm^3, how heavy

English
How do I determine the tone of a sentence? And how do I change that tone. Tone: http://www.tnellen.com/cybereng/lit_terms/terms/3terms.html#Tone http://web.cn.edu/kwheeler/lit_terms_T.html "TONE: The means of creating a relationship or conveying an

MATH
IF U WANT TO MAKE A DOLLAR OUT OF 50 COINS HOW DO YOU DO IT? PLEASE HELP THX first you would want to multiply 50 x 4 and you will get your answer ALL I GET IS 200 I NEED 50 COINS TO MAKE 1 DOLLAR SO WHAT COINS DO I NEED? 45 pennies two nickels two dimes

grammar
Rewrite the following sentences, focusing on the grammar area specified in the left column. To enter your answer, click next to the number and begin typing. If the sentence is already correct, write No Change. Punctuation within Sentences—Colon The book

Business
I need to describe my product. I have a pretend shoe business that I to do for my business class. What exactly I need to do is to describe my product which is shoes. I sell for all seasons, all styles, all prices and everyone. I need it by tonight because

math
simplify 12b^6/3a^0 please specify parentheses please. it can be read so many ways and the answer changes each time.

Algebra
An elephant herd started moving at a rate of 6 mph. One elephant stood still and was left behind. Then the stray elephant began running at a rate of 10 mph to reach the herd. The stray caught up in 5 minutes. How long (in hours) did the stray run to catch

english
When considering the extent that Tolkien borrows the characters,objects and events from the ancient myths, there are a variety of evidences that Tolkien uses the elements of heroism, the precious treasure and the retaliation to create the fantasy story,

To ajones51
Tough pH question #2 answered on page 2 a/o midnight CDT. It will continue to move as time marches. I hope you see the post.

Science
Three statements that define all living things in terms of cells That's not even a complete sentence or question. I searched Google under the key words "living cells define" to get these possible sources: http://www.answers.com/topic/cell

Algebra 1
2 friends are 60 miles apart. They decide to ride thier bicycles to meet each other. Sally starts from the college and heads east,riding at a rate of 21 mph.At the same time Teresa starts from the river and heads west, riding at a rate of 15 mph. How far

Accounting: Lock Box System
What minimum reduction in the time to collect and process each check is needed to justify use of the lock box system? If 400 payments per day, 2,000 average payment size, Bank charge $.40 per check and interest rate is .015 per day. The answer depends on

Math
You start with 101 and want to get down to 0 by subtracting 2. How many times will you subtract 2 from 101? 101 is an odd number and 0 is even; you can't get from an odd to an even by subtracting even numbers. If you subtract 50*2, or 100, you'll get to 1

math/integers
how do you solve integers? There are about a thousand different types of problems with integers, so it depends on what type of problem. Do you have something specific in mind? In general, modulo arithmetic is used, but it is taught in very few schools

science
what is a earthquake look it up in a dictionary science is hard but hang in there If you want to read about earthquakes, an encyclopedia can give much information. Look on plate tectonics. The core of the earth is very hot and consists of molten magma.

Physics
Hi I was wondering if somebody could help me with this question? According to the Bohr model, what determines the color of light emitted when an electron moves from one energy level to another? The color (wavelength) is determined by the change in energy

Social Studies
Who were the Sioux and what did they do in their everyday lives? Since this is not my area of expertise, I searched Google under the key words "Sioux Indians" to get these possible sources: http://www.newadvent.org/cathen/14017a.htm (Broken Link Removed)

Drama
What are the techniques used in improv? I am assuming that you a refering to improvisational comedy rather than music or other areas. Since this is not my area of expertise, I searched Google under the key words "improv techniques" to get these possible

Religious Education (R.E)
Hello, I am doing some homework on the Langar (Free Kitchen for Sikh’s), and would really appreciate it if someone could tell me some food they might have on the menu? For instance: What they could have for Starters, Main Course and Dessert. I just need

Geography
Any good websites on the Great Lakes or Lake Michigan in parcticular? Since this is not my area of expertise, I searched Google under the key words "Lake Michigan" to get these possible sources: http://www.greatlakes.net/lakes/michigan.html

social studies
When was the state seal of Minnesota adopted? Check this site for your answer. http://www.netstate.com/states/symb/seals/mn_seal.htm

science
After the experiment, scientists orginize and ? te data? records the data I started to be a smart alec and put "massage" the data. :) Report the data would fit here also. Technically, we should record the data in the process of doing the experiment. If we

Math
How do find circumference 2*pi*r pi=3.14 r=radius of the circle *=times

English
If there are two independent clauses in a sentance, but one of the already has a comma, then should there be a semicolon before the conjunction? I just got a paper back from my english teacher and this sentance is one he corected: "Though some people

phys
The proper length of one spaceship is 5 times that of another. The two spaceships are travelling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to be the same length. If the slower spaceship is

Economics
Is the federal budget deficit harmful to the U.S. economy? Should we consider a Constitutional Amendment to balance the federal budget? I think it is because to much money is going into things we don't need.Yes we should that way we could keep it all

Science
What is the scientif formula for chalk? It is mainly calcium carbonate, CaCO3 It's mainly calcium carbonate,(CaCO3)

Science
What is the scentific formula for Sodium Thiosulphate? What is the mass of a 30 N rock in the school yard? Sodium thiosulfate is Na2S2O3.

Geometry
You are sliding a big cabinet down a truck ramp for a customer. You must maintain control of the cabinet because it is very heavy. There are 2 ramps in the building. The equation of ramp 1 is y = 2x + 7 and the equation of ramp 2 is y = 3 x + 7. Which is

Geometry/Trig
Hello, I would appreciate it if... 1. If you could give me information on finding the area of a circle inscribed in an equilateral triangle. 2. This problem: A running track is shaped like a rectangle with a semicircle on each of the shorter sides. The

French
Does anybody speak French?Because I need help in it? post your question. Our French teacher will be along sometime this evening. OH ok I just needed help with indefinite and definite articles.are you in French? Thank you for using the Jiskha Homework Help

science
i need help on my science crossword puzzle ok,what do you need help on?

Accounting
A example of a nonprogrammed decision for a clothing manufacturer is a. allocating bonuses to employees. b. acquiring a new supplier for cloth. c. deciding to market products using the internet. d. selecting which customers to offer discounts to. Nataly

ethics
Hi we are studing Asian Americans in my Ethics class. I have to anser these questions and I am confused. The question is, If someone made the below statements to you, how would you explain that the statements are misconceptions? Include whether you think

Business Report Writing
Have you ever seen a communication with poor formatting that made it difficult to understand? Did the message lose some of its desired effect due to the problems? Yes I have. Yes it did.

Finance/Accounting
I'm not sure how to work this oroblem. Can someone assist me. revenues of $230,000 and expenses, including income taxes, of $190,000. On December 31, 2005, Edgemont had assets of $350,000, liabilities of $80,000, and capital stock of $210,000. Edgemont

Math
If you have a recipe for 36 cookies and you want to change the recipe and only make 24 cookies, how much sugar would I need? amout of sugar in 36 cookie recipe x (24/36)=??

phys
a spaceship travels with a speed of 0.7c as it passes by the Earth on its way to a distant star. The pilot of the spaceship measures the length of the moving ship as 50m. Determine its length as measured by a person on Earth. Answer in units of m. for this

Solubility of a Salt  Chemistry
a) How many grams of potassium nitrate (KNO_3) can be dissolved in 100 mL of water at 30°C, 60°C, and 70°C? b) How many grams of potassium nitrate should be added to 100 mL of water at 25°C to make a saturated solution? c) The solubility of potassium

math
2k^1/18m^3 2k^1/18m^3 = 18m^3/2k

english
What is the value of life? pelase help I need to write 5 pages on this Although this is morbid, why don't you try from the approach of "do you want to die?" If you reply no, then write why not. If so, well, I think you need to go to a counselor. no I

Accounting: Break even point
How much profit increase for every unity sold over the breakeven point Breakeven point: This is the point in the annual output where the number of units sold, or number of services provided, produces enough gross profit to cover all the fixed overhead

math
what is u, w, and z? what are you asking?

math
5x^1/y^1 once again, what are you asking? how is this simplified y/5x Whenever you have anything raised to the negative power, flip it upside down. So: X^1 = 1/X or X^3 = 1/(X^3) Whenever anything is raised to the 1 power, it is itself. X^1 = X

math
please help me simplify this exponent 24^1a^3/6^2b^2 Basically it's this right?: (24^1 * a^3) / (6^2 * b^2) so: (1/24 * 1/(a^3)) / (1/(6^2) * 1/(b^2)) you should know that 6^2 = 36 so 1/(6^2) = 1/36 Now multiply: (1/(24a^3)) / (1/(36b^2)) Then

Math
Simplify 2^log8X^27 for the log8X^27 part, base is 8,product is X^27

English debating
Hi we are doing debates tomorrow and my debate group's topic is "should school be voluntary"? I am 3rd speaker on the negative team and I need help finding information and sources for it please. I would also appreciate some rebuttal tips, thank you. Try

math
simplify 15r^0/30p^2 if that's (30p)^2 then the answer is 30p^2 if it's 30(p^2), then the answer is (p^2)/30 don't forget that for (30p)^2, if it becomes 30p^2, i meant that it becomes (30^2)*(p^2). be careful with parentheses 15r^0/30p^2. I assume

math
simplify 12b^6/3a^0 you should read my notes on "rob"'s questions if you're not the same person. lol if that's 12(b^6), then the answer is 12/(b^6) if that's (12b)^6, then the answer is 1/((12^6)*(b^6)) 12b^6/3a^0. I think this is 12(b^6)/3(a^0). a^0

math
simplify u^3wz^3 (u^3)/((w^3)*(z^3))

math
simplify cd^4e^1 okay rob or jim. read my math tip notes, okay? otherwise you'll do poorly on your quizzes. :) if you meant ((cd)^4) * (e^1) e/((c^4)*(d^4) or if you meant ((cd)^4) * (e^1) e/((c^4)*(d^4) or if you meant (c(d^4)) * (e^1)

math
simplify cd^4e^1 please specify parentheses or at least separate them so i know which groups fall under which exponents.

economicsworked out, need confirmation
hey ppl i have already done he working out and need ppl to just confirm my working out etc. Q: The market demand and supply curves for an agricultural product are as follows: Qd = 4500250P and Qs = 200p where quantities are in thousands of bushels per

math
simplify 35(21^1) 21^1 = 1 / (21^1)