# Questions Asked onMarch 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

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

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

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???

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

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.

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

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.

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

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

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

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.

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

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

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

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

17. ## MICRO ECONOMICS

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

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

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. =)

20. ## math

wat is the squre root of 309 http://www.math.com/students/calculators/source/square-root.htm

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

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.

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)

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

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: www.jiskha.com Better results there, too, since you'll have fellow

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

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

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

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

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

31. ## algebra

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

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

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

34. ## algebra

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

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

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

http://en.wikipedia.org/wiki/Frankenstein 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

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

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

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

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?

42. ## the great depression

Describe two causes and effects of the Great Depression. superficial prosperity would be a cause http://www.google.com/search?q=%22great+depression%22+causes+effects&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

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?

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

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?

Identify some laws that are different among various states.

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!!! = ) http://sunearth.gsfc.nasa.gov/eclipse/OH/OH2007.html That site shows the dates of the lunar eclipses in 2007. tonight in GrifFith iNDIANA AT 8:14PM

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.

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

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

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

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:

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:

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

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