Questions Asked on
March 3, 2007

  1. Chemistry

    Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years? A. 2.0 grams of 198 Au B. 2.0 grams of 42 K C. 4.0 grams of 32 P D. 4.0 grams of 60 Co By the way the numbers next to the elements are their

    asked by Sanjay
  2. system analysis in transportation INTRODUCTION TO

    TruckCo manufactures two types of trucks: 1 and 2. each truck must go through the painting shop and assembly shop. if the painting shop were completely devoted to painting type 1 truck, 800 per day could be painted, whereas if the painting shop were

    asked by Lamar
  3. Physics/Math

    A can of sardines is made to move along an x axis from x1 = 0.2 m to x2 = 1.2 m by a force given by F = iF0exp(-0.4x), with x in meters and F0 = 4.5 N. (Here exp is the exponential function.) How much work is done on the can by the force? For Further

    asked by Technoboi11
  4. math

    can an inner product space v have a t invariant subspace U but also have an orthogonal complement that is NOT t-invariant???

    asked by mk
  5. Calculus

    We are calculating the slope of the function f(x) = sqrt(x) at x = 4. f(4) = 2 f(4+h) = sqrt(4 + h) [f(4+h) - f(4)]/h =? You have to pick a small h,and calculate it. Then pick an even smaller value and calculate it again. That's called taking the limit as

    asked by Anonymous
  6. chem

    can anyone help me with this question what is the advantages and disadvantages of hydrogen power as opposed to hydrogen fuel, also what is the equation for hydrogen feul? I do not understand your first question. Hydrogen power REQUIRES hydrogen fuel.

    asked by ana
  7. chemistry,

    ,I NEED TO DRAW A LEWIS STRUCTURE for C2n2,cyanogen,and to state the noble gas,i know the answer is neon,but i have far to many electrons and am getting the gas argon,please help :N:::C:C:::N: please where do u think i am going wrong I don't know. You

    asked by jane
  8. herbert hoover

    Most Americans blamed Hoover for the Great Depression. Is that view of Hoover justified? Please post your answer and we'll be glad to comment on it.

    asked by Anonymous
  9. Gen. Chemistry lab

    Trying to find mass percent of acetic acid in 25 drops of .683M NaOH solution are required to neutralize 10 drops of cleaning vinegar. Assume that the density of the cleaning vinegar is the same as the density of regular vinegar which is 1.05 g ml-1 You

    asked by Toni
  10. English

    Hi, If anyone has read Hamlet...I have to write an essay showing how Hamlet is a hypocrite or similar. I need 3 main points of proof. I only have one, which is that Hamlet says he loves Ophelia but hes the cause of her death and he shunned her. I need two

    asked by Raj
  11. Math(Please Help)

    x-2 6x ____ - _____ 3x+4 x+1 *You are supposed to simplify the expresion.I really need help with this and some other problems.Please and Thank you.- Perhaps I could help but I can't make heads or tails of your posts. Try using parentheses (and / bar for

    asked by Margie
  12. Chemistry

    Does fission store or create energy. I think it creates it... can you help me with my math please? If atoms fission, energy is emitted in the process.

    asked by Aj
  13. French

    Thank you for using the Jiskha Homework Help Forum. "Tout le monde le regarde." Next time, YOU try first, please! We HELP rather than DO. Invest in a good paper-back dictionary (English to French/French to English.) How do you say "everyone is looking at

    asked by SraJMcGin
  14. Physics- drwls please help

    Please tell me where I am going wrong. A 59.5 kg person, running horizontally with a velocity of +3.90 m/s, jumps onto a 12.2 kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and

    asked by Mary
  15. Economics- Exogenous Demand/Supply Shocks

    I need to know which way aggregate demand (AD) shifts according to scenarios and why: 1) Economic booms in both Japan and Europe result in massive increases in orders for exported goods from the United States. 2) As part of its countercylical policy, the

    asked by Kelly
  16. math algebra

    Do you want the equation of a line through that point (1,2) with slope m = 4? Use the equation (y-y*) = m(x - x*) where x* and y* are the coordinates of the point the line has to pass through. (1,2)m=4

    asked by drwls

    You have been allocated an investment budget of $100 million U.S. You are to make a strategic assessment of the microeconomic strengths and weaknesses of the industry in South africa in REFREIGRATORS & FREEZERS as a potential location for this new capital

    asked by AKHIL
  18. Physics

    Which electromagnetic radiation: a)will diffract round hills b) can be used to cook food c)can themometers detect d)cause skin cancer e)is ued when taking a photograph with an ordinary camera thanks!! I will be happy to critique your thoughts. Some have

    asked by Jessica
  19. Thomas

    What colour and formula are the iron 2+ & iron 3+ chloride complexes? The subject is science not Thomas!! It helps teachers to see the real subject area so they don't waste time reading items outside their realm. =)

    asked by James
  20. math

    wat is the squre root of 309

    asked by jose
  21. Sociolagy

    Hi, I was wondering if someone could possibly help me out here I'm basically looking for a study to help support my coursework hypothesis, [b]Cocket, M. & Tripp, J. (1994). The Exeter family study: Family breakdown and its impact on children (University

    asked by As-Student
  22. Math

    How do you solve an eguation with 2 variables? You have to have two independent equations to solve for each of the variables.

    asked by Jane
  23. Math

    Hi How do I add x/(x+1) + x^3? How do I divide those two numbers as well? adding: get a common denominator, x+1 x/(x+1) + x^3(x+1)/x+1 x(1 + x^3 + x^2)/(x+1) divide? I am not certain what you mean. Thank you so much! What I mean is how do I divide x/(x+1)

    asked by Lisa
  24. algebra

    Find the equation of the line passing through the points: (-5,-5) and (6,-5) Hmmm. both y are -5. The line has to have zero slope, and the y intercept is -5 y= -5 is the equation Thank You

    asked by jacque
  25. Riddle

    Looking for a word that fits this riddle: Look near a lively game; pointing to a path with a rabbit in its name. There's a place to post riddles at the bottom of the main Jiskha webpage: Better results there, too, since you'll have fellow

    asked by Elayne
  26. Physics/Math

    What work is done by a force (in newtons) F = 3.1xi + 3.1j, with x in meters, that moves a particle from a position r1 = 2.1i + 2.5j to r2 = - -4.9i -3.9j? For Further Reading * Physics/Math - bobpursley, Thursday, March 1, 2007 at 6:27am Work is the dot

    asked by Technoboi11
  27. Physics/Math

    A single force acts on a 5.0 kg particle-like object in such a way that the position of the object as a function of time is given by x = 3.0t - 4.0t 2 + 1.0t 3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to

    asked by Technoboi11
  28. algebra

    Find the slope of the line 8x+y=11 Put it in point slope form: y= -8x + 11 slope: -8 y intercept: 11 Thank you

    asked by jacque
  29. chemistry

    Hi! i'm kinda having trouble getting this.. Don't understand it really from Ca(OH)2 + 2HCl-----> CaCl2 + 2H2O How do i calculate Ca+? :You need much more information. 1) do you mean the concentration of Ca+ ion? 2) is there excess HCl? What is given? ok It

    asked by Mallory
  30. chem

    Can someone please help me balance this equation? CH3OH + O2 ===> CO2 + H20 Thank you! CH3OH + O2 ===> CO2 + H2O To balance the H, put a two on the right. CH3OH + O2 ===> CO2 + 2H20 H and C are now balanced. O is balanced. Too easy. Are you sure that's

    asked by Abby
  31. algebra

    y(-9) (times) y(-5) Simplify exponents add. y^(-5-9) is ... Thank you

    asked by jacque
  32. Science

    A force of 100 newtons was necessary to lift a rock. A total of 150 joules of work was done. how far was the rock lifted? Work=force*distance. solve for distance in meters. plesa help me on my homework come on do it plesa plesa plesa is my last time

    asked by jojo
  33. Physics, spring force

    To compute work done by the spring force, calculate the area of a: a)rectangle b)circle c)triangle The spring force changes as a function distance, so triangle if on a F vs x plot

    asked by Anonymous
  34. algebra

    How do I solve this equation? a/5 - 1/5 = -2 multiply both sides by 5. then add one to each side.

    asked by jacque
  35. (expi)^i

    can someone tell me how can we calculate (expi)^i. there is one thought to say that it is equal to exp(-1) but this is not true. i think that one has to use the euler's equation : exp(ix)=cosx+isinx. but in this case, x=1? and how can we calculate after

    asked by natassa
  36. (expi)^i

    This question is not well defined. By 'expi' do you mean exp(i)? In other words, is the expression [exp(i)]^i ? If so, then the answer is undoubtedly exp(-1). You can use Euler's equation to show this, but it is much easier to use this fact about

    asked by DrPhysics
  37. reading In the book, Frankenstein is the name of the creator of the monster. In popular movies and culture, Frankenstein is often referred to as the __________________. ?? What is the biggest difference between the

    asked by Writeacher
  38. Math

    Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and

    asked by Lisa
  39. us history

    i have a DBQ that i'm not sure how to introduce (the first paragraph). the question is: in what ways and to what extent did constitutional and social developements between 1860 and 1877 amount to a revolution? thanks in advance You might consider something

    asked by nina
  40. algebra

    Can someone please check my work on this problem? For some reason, I get the feeling that I did it wrong. sqrt=square root (by the way) 3-sqrt10 sqrt5+sqrt2 -------- * ---------- sqrt5-sqrt2 sqrt5+sqrt2 (3-sqrt10)(sqrt5+sqrt2) = ----------------------- 5-2

    asked by Whitney
  41. computers-html/javascript

    when working in notepad, i need to use pop-up boxes (alert, confirm,etc). When a user presses ok more boxes come up. however if the user presses cancel i want them to go back to the homepage (thus stopping the other boxes from coming up). how do i do that?

    asked by amanda
  42. the great depression

    Describe two causes and effects of the Great Depression. superficial prosperity would be a cause

    asked by Anonymous
  43. computers-html/javascript

    when working in notepad, i need to use pop-up boxes (alert, confirm,etc). When a user presses ok more boxes come up. however if the user presses cancel i want them to go back to the homepage (thus stopping the other boxes from coming up). how do i do that?

    asked by amanda
  44. ENGLISH!

    hey i need some help =[ for english i have to write a paper about "if i were hamlet what would i do in terms of killing the ghost. it says to take into account the revelations of the ghost, the situation at cort, characters etc....idk how i could create

    asked by gina
  45. business law- fill in the blanks

    Business law reflects the values of the _________________ _________. common law, society's values, business owners, ordinary consumer??? What does your book say?

    asked by Anonymous
  46. business law

    Identify some laws that are different among various states.

    asked by Anonymous
  47. Are we supposed to have a lunar eclipse tonight?!?

    same as the subject! well i mean 3/3/07 thank you writeacher you always help me!!! = ) TY EVERYONE!!! = ) That site shows the dates of the lunar eclipses in 2007. tonight in GrifFith iNDIANA AT 8:14PM

    asked by Holly
  48. Home Economics

    How come yall never answer my questions? I'm sorry, but I don't see any other home economics questions posted by Mirayah. Please repost your question and I'm sure someone will answer it.

    asked by Mirayah
  49. Science/maths

    describe how you could make the following measurements and discuss any problems you might encounter a) finding the volume of a rugby ball b) finding the diameter of tennis ball. c) findin the mass of a grain of sugar a) submerge it in water in a graduated

    asked by San
  50. physics

    A cart of mass 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision the first cart continues in its original direction at

    asked by Chris
  51. physics

    In a game of pool the cue ball strikes another ball of the same mass and initially at rest. After the collision the cue ball moves at 3.50 m/s along a line making an angle of 22 degrees with its original direction of motion. and the second ball had a speed

    asked by Chris
  52. Social Psych

    Compare and contrast the two routes to persuasion. Which two routes to persuasion are you comparing and contrasting? We don't do your homework, but we will critique and offer suggestions for your ideas. Here are some articles that might be helpful:

    asked by Marie
  53. Math2(Please Help)

    4x 8 ___ - ______ x+2 x-1 *Simplify The Expression I'm going to assume your problem is this: 4x/(x+2) - 8/(x-1) Use a common denominator since the denominators are not the same. Common denominator is: (x+2)(x-1) Rewriting the problem, we have:

    asked by Margie
  54. Math33333

    Please help me! Problem: x+2 x-3 _________ - _________ 2x^2+5x+2 2x^2-5x-3 *Simplify the expression 2x^2+5x+2 =(x+2)(2x+1) 2x^2-5x-3 =(2x+1)(x-3) So x+2/(x+2)(2x+1) = 1/2x+1 x-3/(2x+1)(x-3) = 1/2x+1 Finally 1/2x+1 - 1/2x+1 = 0 Let's take a look at the

    asked by Margie
  55. math,mathguru

    you asked me about how did i came up with my answer this is what i did: Write each fraction in simplest form. #18 (-5x^3y^3)/(-20xy^4) = (3X(-5)X(x)X(x)X(x)X(y)X(y)X(y))/(2X2X(-5)X(x)X(y)X(y)X(y)X(y)) = after canceling the common terms top and bottom i am

    asked by jas20
  56. Chemistry

    Does fission store or create energy. answered the duplicate question.

    asked by Aj
  57. Science/maths

    what are some problems you might encounter when a)finding the volume of a rugby ball b)finding the diameter of a tennis ball c) finding the mass of a grain of sugar can you help me then I help you please w/b a) submerge it in water in a graduated container

    asked by San