Questions Asked on
December 4, 2006

Chemistry!
When 2.5g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0 C, the temperature of the solution went up to 37.1 C. a. Is the solution reaction exothermic? Why? The temperature or the water went from 24.0 to 37.1 which is an increase. If the
asked by DrBob222 
Econ.
In recent years, some policymakers have proposed requiring firms to give workers certain fringe benefits. For example, in 1993, President Clinton proposed requiring firms to provide health insurance to their workers. Let’s consider the effects of such a
asked by Jenny 
Economics
6. Show the effect of each of the following events on the market for labor in the computer manufacturing industry. Use graphs. a. Congress buys personal computers for all American college students. Wouldn't the demand curve shift to the right while the
asked by Mariah 
UrgentChemistry Help
I need help with the heat effects and calorimetry worksheet. Please explain how to solve it! Thank you so much! A metal sample weighing 45.2g and at a temperature of 100.0 C was placed in 38.6g of water in a calorimeter at 25.6 C. At equilibrium the
asked by Tiffany 
Economic
Suppose that labor is the only input used by a perfectly competitive firm that can hire workers for $50 per day. The firm’s production function is as follows: Days of Labor/Units of Output: 0/0, 1/7, 2/13, 3/19, 4/25, 5/28, 6/29, 7/29 c. Compute the
asked by Mariah 
Economics
hey...i had a similar econ question..check out schoolpiggyback (search it on google)...it'll help ya out...its other students that answer your question (maybe someone from your class...lol)...goodluck : ) 3. A large share of the world supply of diamonds
asked by steve 
Math I really need help!
http://www.jiskha.com/display.cgi?id=1165286122 A group of students decided to look at rectangles that are spuare. They find that no matter what size square they drew, every square was similar to shape B in the Shapes Set and to all other squares. They
asked by bobpursley 
Math HElP!!!!!!!!
A group of students decided to look at rectangles that are spuare. They find that no matter what size square they drew, every square was similar to shape B in the Shapes Set and to all other squares. They found that all squares are similar! They decided to
asked by chemiii 
History
These sites should have what you need: http://www.answers.com/topic/xyzaffair http://www.ushistory.com/pages/h465.html The xyz affair caused what problems for the president John Adams?
asked by GuruBlue 
Physics
Archimedes principle. The weight of the bouy is given, so the weight of water displaced by the submerged part of the bouy equals that. Figure the volume that weight of water displaces, then figure the height of a .33m diameter column of water will have of
asked by bobpursley 
Calculus
The rate of growth of the profit (in millions of dollars) from a new technology is approximated by P'(x)=xe^(x^2) Where x represents time measured in years. The total profit in the thrid year that the new technology is in operation is $10,000. A. Find the
asked by Liz 
physics
what kind of force field surrounds a stationary electric charge? What additional field surrounds it when it moves? "what kind of force field surrounds a stationary electric charge?" Electric field. "What additional field surrounds it when it moves?"
asked by amy 
Business Cal
Suppose a publishing company has found that the marginal cost at a level of production of x thoudsand books is given by: C'(x)=50/sqrroot(x) and the fixed cost is $25,000. Find the cost function C(x). C= INT C'= INT 50/sqrtx= 100 sqrtx + F where F is the
asked by Sara 
Physics
A wheel has a coonstant rotational acceleration of 3.0 rad/s^2. During a certain 4.0 s interval, it turns through an angle of 120 rad. Assuming that the wheel starts from rest, how long is it in motion at the start of the 4s interval. I just need help in
asked by laura 
physics
A heavy flywheel rotating on its central axis is slowing down because of friction on its bearings. At the end of the first minute of slowing, its rotational speed is 0.90 of its intial rotational speed of 250 rev/min. Assuming a constant rotational
asked by laura 
calculus
It is estimated that x years from now, the value V(x) of an acre of farmland will be increasing at the rate of: V'(x)= 0.4x^3/sqrroot(0.2x^4+8000 dollars per year. The land is currently worth $500 per acre. A. Find V(x) b. How much will the land be worth
asked by Liz 
chemistry gas laws
In a science demonstration, 4 to 6 plastic garbage bags are arranged under a 2 m by 2 m piece of plywood. A volunteer stands on the plywood and others blow into the bags to "levitate" the volunteer. If four bags are used and a 140 lb person is on the
asked by bb 
Statistics
Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses re made and each question has 6 possible answers. My answer is 1/36 Assume that the data has a normal distribution and the number of observations
asked by Sue 
chemistry
I have two Questions I need help with. 1. Why do some combinations of ionic compounds form a precipitate while other ionic compounds don't? AND 2. Solutions of lead(II)nitrate and potassium iodide are combined in a test tube and form a yellow precipitate.
asked by cbarnett 
History
Why were federalists shocked by adam's decision to resume peace talks with the french?
asked by George W. Adams 
Probability
If you pick a card at random from a well shuffled deck, what is the probability that you get a face card or a spade? a) 3/26 is that correct In one town, 336% of all voters are Democrats. If two voters are randomly selected for a survey find the
asked by David 
math/Check!
a. An ellipse is formed by stretching the graph of x^2+ y^2=1 horizontally by a factor of 3 and vertically by a factor of 4. Determine the equation of the ellipse in standard form x^2/a^2+y^2/b^2=1 (x/3) ^2+ (y/4) ^2=1 x^2/9 + y^2/16 =1 so the equation is:
asked by sam! 
math, algebra
Can someone check this for me : Find the gcf for each of the following groups of numbers: 36,64, and 180 My answer: gcf=4 Find the lcm for each of the following groups of numbers which ever method you wish:8,15, and 20 My answer: Lcm=1 Find two factors of
asked by jasmine20 
Business Calculus/AntiDerivatives
Suppose the marginal profit from the sale of x hundred items is: P'(x)=46x=3x^2 and the profit of 0 items is $40 A. Find the profit function. B. Find the profit from selling 800 items I assume the P' is 46x+3x^2 Then P= 4x  3x^2 + x^3 + C where C is
asked by Lisa 
algerbra
mrs. johnson is 3 times as old as her son. ten years agoe she was 5 times as old as her son was then. what is the two equations for this problem? let x = son's age and y = Mrs. Johnson's age. ============================ y=3x is one equation. 10 years ago
asked by shay 
Business Cal.
Suppose the marginal revenue (in dollars) from the sale of x jet planes is R'(x)=2x(x^2+50)^2 A. Find the total revenue function if the revenue from 3 planes is $206,379. B. How many planes must be sold for revenue of at least $450,000?
asked by David 
Calc Jacobian
Thanks "I know that the xy region is the line x=y y=0 and y=1 x/2)" It is helpful to rewrite the region in the xy plane by specifying the three lines and the endpoints, i.e. the points where they intersect. If you insert these points in the formula for U
asked by Rob 
someone please chek my math!
a. An ellipse is formed by stretching the graph of x^2+ y^2=1 horizontally by a factor of 3 and vertically by a factor of 4. Determine the equation of the ellipse in standard form x^2/a^2+y^2/b^2=1 (x/3) ^2+ (y/4) ^2=1 x^2/9 + y^2/16 =1 so the equation is:
asked by sam! 
chemistry
CH3CCH IN LEWIS DOT DIAGRAMS FNO,N2H4,PCL5,CH3OH,OH,LiOH,NO2,NO2,HNO3,CH3CHO,IF3,Asf3,SO23, H2SO4,XeO3 Dot diagrams are almost impossible here in text, with hard carriage returns. Sorry.
asked by zeina 
Writing Class
Can someone give me some ideas on what to narrow my research topic to? My topic is animal testing. My paper has to be 2,000 to 2,500 words including my references. Thanks :) What about eye testing drugs? That is done a lot, and appears to have no
asked by rindi 
math,algebra,bobpursley
Let me know if this is correct now: (1)Finding the lcm using which ever method for:5,15 , and 20 8:2x2x2x3x5x5 15:2x2x2x3x5x5 20:2x2x2x3x5x5  LCM:2x2x2x3x5x5 After simplification LCM:120 (2)Find the GCF for each of the following numbers: 36,
asked by jasmine20 
superlatives
I was told that at one time the superlative "worst" was not correct. It used to be "bad worse worse"rather than "bad worse worst". Is this true? If so, when did the change take place? Thank you. Thank you for using the Jiskha Homework Help Forum. 1. First
asked by Mary 
World History
Wow! Thank you very much! Do you have any ideas about the items I listed at the bottom which I am not sure how to incorporate. And, does my opening paragraph reflect an analytical thesis? Do I discuss, describe, evaluate and show in my paper? Is it logical
asked by Anonymous 
history
why is the northwestern corner of minnesota not canada The gents formulating the Treaty had a lousy map. http://en.wikipedia.org/wiki/Northwest_Angle
asked by chris comstock 
Science
What is a Chemical property? What is a Physical property? thanks Usher and im not the singer..... http://www.onelook.com/ Type in chemical property, then, do it again with physical property.
asked by Usher 
chem
why do good oxidizing agents easily reduce? Good (strong) oxidizing agents are easily reduced. What you said I think differs slightly from that. If they are strong oxidizing agents, they easily oxidize other ions and in doing so the oxidizing agent is
asked by Tanya 
English literature
Cyrano de Bergerac: (you don't really have to have read the book) I have to think of contemporary (modern day) parallels (ie: crimes, political, entertainment, or gossip column news, advertisements, etc.) for each of these characters or events: (I've been
asked by suz 
science
how do you do a powerpoint for a biodiversity museum exhibit. I need to do a presentation. Are you making one or visiting one? Are you in need of info on how to use PowerPoint, or what to say? If the latter, be more specific. We cannot prepare
asked by stacy 
MATH/ Check?
Correct. what is pi The definition or the number? The number is 3.14159 but that isn't an exact number. pi doesn't have an exact number except by definition and that is in words and not a number. The ellipse in question above( is translated 4 units to the
asked by bobpursley 
To sam!
Was the five part unknown question for compounds A through E yours? If so, did you get it answered ok? no it was not mine! can you please check my math? can you please check my math?
asked by DrBob222 
writing
i areleay need help http://www.angelfire.com/wi/writingprocess/ http://leo.stcloudstate.edu/catalogue.html http://www.arts.uottawa.ca/writcent/hypergrammar/paragrph.html (Broken Link Removed) These sites can help you generally. If you have a specific
asked by tatianna 
Math Word Problem
Todd has indigo, yellow, pink, and red flowers in his green house. The ratio of indigo flowers to yellow is 3 to 5. The ratio of yellow to pink is 2 to 4. The ratio of indigo flowers to red is 2 to 5. There are 6 indigo flowers. How many flowers of each
asked by Donna 
Business Calculus
Evaluate each indefinite integral. Use the substitution method. X square root (x+3) dx
asked by Lisa 
History
How did the xyz affair divide the two political parties?
asked by George W. Adams 
chemistry
CH3CCH IN LEWIS DOT DIAGRAMS OK. Move the two top electrons on carbon 2 to carbon 3 and do the same for the two lower electrons on carbon 2. Move them to carbon 3. I'll see if I can do that but you see how difficult it really is.
asked by zeina 
science
consumer science or chemistry What is the field of science if I am dealing with the problem which detergent works the best?
asked by bobpursley 
Math
How many different threedigit numbers can be written using the digits 4, 5, 6, and 7? Use each digit only once in a number. Is the answer24 different 3digit numbers? I did this the long wayIs there a short equation to use for this? Thank you! You
asked by Tony 
Beorstone
Why does walter love his peaches so much He does not love his peaches, he is only shaking his tree to make them fall, but his actions are misinterpreted for narcissism.
asked by E 
CHEMISTRY
what is the symbol for chromium (II) sulfate? You mean the formula? CrSO4 yes! thanx!!!!!! do u know how to find the number of molecules or atoms in a mole? The number of atoms in a mole is called Avogadro's number, the value of which is approximately 6.02
asked by INEEDHELP!!! 
economics
Which combination of fiscal policy actions would be most stimulative for an exonomy in a deep recession? a) increase taxes and government spending b) decrease taxes and government spending c) increase taxes and decrease government spending d)decrease taxes
asked by Colleen 
precalculus HELP!
I posted this question before: What is the area enclosed by the graph of the absolute value(3x)+ the absolute value(4y)=12 I tried solving for y and got: y=4x when I graphed this, I got a linear equation graph...I am wondering if I am supposed to find the
asked by sara 
Business Cal
The research department for a hardware chain has determined that at one store the marginal price of x boxes per week of a particular type of nail is: p'(x)=4000/(2x+15)^3 Find the demand equation if the weekly demand for this type of nails is 10 boxes
asked by Alex 
math
how do you solve this type of math problems that indicates to perform the indicated operations for 3 and 3/4 divided by 1 and 3/8 convert the whole numbers into fractions. 3 3/4 = 15/4 1 3/8 = 11/8 to divide 15/4 by 11/8 invert the denominator and
asked by jasmine20 
Math
The kingston parks and recreation dept. is planning a new that will be 100 yards long and 85 yards wide. The dept. recommended that the trees be planted along the perimeter of the park at equal distances from each other and as far apart as possible. How
asked by Donna 
Statistics
1) No, 8.0 is the correct answer. 2) a strange and unlikely probability distribution. But lets go with the stated parameters. It states that ZERO percent of the population loses less than 6 lbs OR more than 12 lbs, but exactly evenly distributed between 6
asked by economyst 
math  exponents
help! (2^20/2^17)^3= (3y^6)(8y^3)= (4a^3y^4/2a^5y^7)65= I will do one: you need to review the rules. (2^20/2^17)^3= (2^[2017])^3= (2^3)^3= (2^9) = calculator
asked by carlos 
social studies
what are the qualities of a good socialstudies? HOW ARE The textbook used by the teacher? Opinions vary. And it depends on the course, and the age of the students, and the IQ level of the students (AP, regular, or less). My own use of texts has a history
asked by daniel 
math/ confused!
What degenerate form or forms of the parabola CANNOT be obtained from the intersection of a plane and a double napped cone? I have to use a diagram and give complete description how to obtain this ( or these) form(s) how would I do this question
asked by edwen! 
Psychology
hey..check out schoolpiggyback (on google)...they got psychology students that will answer your questions there...neways..goodluck : ) Psychologists have used four perspectives in their efforts to explain motivation. These include an emphasis on instincts,
asked by steve 
Mathematics question
It was...the subject is FOILs,I thought we needed to put what we were doing in the subject... Subject area needs to be properly stated. This is not FOIL. That is multiplying of two binaries as in (a+b)(c+d) Here you are to factor. take the first:
asked by Margie... 
Math: matrices
If A and B are both square n x n matrices, If AB = I, prove BA = I Presumably you have to do this without using the usual properties of the inverse of matrices. But we do need to use that if there exists a matrix B such that A B = I then the equation A X =
asked by mathstudent 
Science
I need help with types of levers. How can you tell the difference between first class second class ect. ect. http://en.wikipedia.org/wiki/Lever
asked by Sam 
science
What would be a good title for the project which detergent works the best? Effectiveness of Detergents
asked by chris 
deek
Your IP address 208.47.17.96 has been reported to your ISP.
asked by bobpursley 
MATH
How do you write fractions in simplest form? for example I need explanation 48/66 Also I started on another one it states that I have to multiply. and I have to be sure to simplify each product 7/9 x 3/5 My answer: 21/45 I just don't know what goes after
asked by jasmine20 
science
plz help me!!!!! what are morels in biology???? are they fungi,bacteria,or something else they are a fungus, delicious too :)
asked by gazthewiz 
world history
What are some good sites to use as a resource in writing a paper which would discuss two revolutions i.e. french revolution, etc.? American Revolution http://www.loc.gov/rr/program/bib/ourdocs/NewNation.html http://www.pbs.org/ktca/liberty/
asked by ML 
Science/Nutrition Information
Does the egg white have more protein or the egg yolk (yellow part of the egg) have more protein? http://nutrition.about.com/od/askyournutritionist/f/eggwhite.htm
asked by John 
ART
For an art project, I have to try and find an artist(preferably famous so that i can find information on him/her)that draws/paints buildings. As i am having trouble finding one. Thank you if you can help! Thank you for using the Jiskha Homework Help
asked by Natalie 
calc
correction: 9/25(u+7)u^11 du = 9/25(u^12 + 7 u^11) du and you can easily integrate this indefinate integral of 9x(5x7)^11 dx using the u substitution method: i know u= (5x7) but when i use this the x in the 9x doesn't cancel thus x= (u+7)/5. however when
asked by Count Iblis 
English
In shakespearian language, thou=you so how would you say, "I." I Shakespeare also used "you" often. Answering your question, the first person would be I, and plural, we. http://www.cummingsstudyguides.net/xThou.html
asked by Gina 
Powers!
1. Should be 8a15 but I think that is just a typo because the * and 8 are on the same key of the keyboard. 24 look ok to me. 5. What you have looks ok to me; however, can't these two terms be multiplied to give 200x8y9 ? Yeah sorry about #1 that's what I
asked by DrBob222 
grammar
was wondering if you can help me correct these following sentences: focus is on glossary usage. 4. I use to be a philosopher, but now my brain works as it should. 5. "Woe is I," Kierkegaard shouted as he jumped off of the cliff with alot of nonbelievers.
asked by tiffany 
No Subject. This is a Thank You to Mr. Pursely
Thank You so much for all of your help. I really needed it.
asked by chris 
math
Simplify: 6x+3y/3 Divide the denominator three into each of the numerals in the numerator, it reduces.
asked by Michele 
Current Events
I nedd help finding articles about Supranationalism, Devolution, The European Union, North Atlantic Treaty Organization(NATO)and Gerrymandering that are within November 29,2006 It looks as if what you need to do is learn how to conduct thorough and
asked by Nique From Dallas 
Economics
For the following characteristic say whether it describes a perfectly competitive firm, a monopolistically competitive firm, monopoly firm, or neither. Equates marginal revenue and marginal cost I would think that it would be each one of them since each
asked by Sally 
social studies articles of confederation
true or false that money in one state was different for money in another state? true each state got to pick there desins
asked by jovanna 
math
Is there anywher i can go for further explanations on how to solve for the following statements on how to solve them: Dividing writing each result in simplest form & adding & subtracting I searched Google under the key words "fractions divide add subtract"
asked by jasmine20 
SCIENCE
WHAT IS THE PART OF AN EXPERIMENT THAT IS NOT BEING TESTED AND IS USED FOR COMARISON control group
asked by DAJA 
sorry *Mr. Pursley
Mr. Pursley
asked by chris 
Botany
What is the advantage of plants being green under direct sunlight and yellow or red under the shade? If the plants are under sun then they wont attract as much light if they are dark colored. If they are bright colored and in a dark place then they attract
asked by Nikki209