Questions Asked on
July 3, 2010

  1. physics

    7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car?

    asked by muller
  2. Chemistry

    Thanks for the help earlier My question Silicon tetrachloride (SiCl4) can be prepared by heating Si in chlorine gas: Si + 2Cl2 yields SiCl4 In one reaction 0.507 mole of SiCl4 is produced. How many moles of molecular chlorine were used in the reaction? Ok

    asked by Kate
  3. Chemistyr 152

    Given the following data, what is the value of delta Gf (in kJ) for N2O4 (g) at 25C. N2O4(g)-----2NO2(g) Keq= 0.144 delta Gf: ? 51.30 I thought of using the equation: delta G-RTlnQ I am not sure if that's what I should use to find N2O4 though???? Choose

    asked by Car
  4. Stress Management Techniques

    1. Which one of the following chemicals does the body generate during regular exercise? A. Adrenaline C. Endorphins B. Sodium chloride D. Estrogen 2. Which one of the following choices would indicate that a person has entered the exhaustion stage of

    asked by Sarah
  5. mtha

    Each letter of the alphabet is written on a separate piece of paper and placed in a box. Find the probability of drawing a vowel, {a, e, i, o, u}, or a letter in the word "sum"

    asked by Anonymous
  6. chemistry

    Consider the following equation: N2O4(g)+ 2NO2(g) Kc= 5.8 x 10^-3 If the initial concentration of N2O4(g)= 0.040 M and the initial concentration of NO2(g) is 0 M, what is the equilibrium of concentration of N2O4(g)?

    asked by Jim
  7. system design

    draw a use case diagram for the following situation Stillwater Antiques buys and sells one-of-a-kind antiques of all kinds. Each item is uniquely identified by an item number and is also characterized by a description, asking price, condition, and open

    asked by yog
  8. Chemistry 152

    How many of the following processes would you expect to be spontaneous at 298K and 1atm? dissolving sugar in water decomposing NaCl to the elements climbing a mountain H2O (l)------H2(g)+O2(g) Choose one answer. a. 0 b. 1 c. 2 d. 3 e. 4 I thought that it

    asked by Car
  9. Programming

    Design a program that calculates the total amount of a meal purchased at a restaurant. The program should ask the user to enter the charge for the food, and the calculate the amount of a 15 percent tip and 7 percent sales tax. Display each of these amounts

    asked by TJ
  10. chemistry

    A mixture containing 0.0392 M A(g) and 0.0452 M B9g) is allowed to come to equilibrium at 300K. The reaction: 3A(g)+ 2B(g)=> C(g)+ D(g) occurs. At equilibrium, [C]=0.00128 M What is the value of Kc?

    asked by Jim
  11. chemistry

    a 10.0-ml sample of aqueous HCL requires 24.32ml of 0.134M NaOH to reach the endpoint, what is the molar concentration of H2SO4

    asked by weet
  12. Literature

    In Romeo and Juliet, who was the alst person to see Juliet alive? A. Romeo B. Friar Laurence C. the Nurse D. Lord Montague E. Paris I actually found this question confusing and tricky. First, I was thinking whether the question is asking who was the last

    asked by Maria
  13. economics

    Explain what happens to the official measure of GDP in each of the following situations. a. air quality improves significantly throughout the US but there are no effects on aggregate production or on market prices of final goods and services. b. The US

    asked by shelita
  14. us history

    Imagine that you are a railroad worker in the late 19th century in America. The Great Railroad Strike of 1877 has just begun as you consider joining the local railroad labor union. Why are so many of your co-workers going on strike? Are you going to join

    asked by Veronica
  15. trig

    evaluate the trigonometry function using its period as an aid cos(-7pi/3)

    asked by Lisa
  16. Chemistry

    I have realized I don't understand Avagado's number at all My book shows me this diagram instead of just providing a simple formulas that makes no sense at all here is what I have made sense of so far (6.022 x 10^23 atoms/mol)(mass of element) = molecular

    asked by Kate
  17. Literature

    During the Renaissance, people rediscovered the literature of the past. True or False? At that time there was an enormous renewal of interest in and study of classical antiquity. So True, right? Just wanna make sure, Thanks.

    asked by Andy
  18. Calculus please help!

    Suppose you have a set of data points for x and t. Using the below formula you need to graph a STRAIGHT LINE. x = 1/2 a t^2 Now, I know I would graph x versus t, but do I graph: -x versus t -x versus the root of t -x versus t^2 -or possibly x^2 versus t???

    asked by Madasan
  19. early american history

    How did capitalism, agriculture, and industrialization contributed to economic development, regional specialization, and social reforms in early american history?

    asked by Jo
  20. TV

    If I want to create my own television show in the future, how can I reach that goal by taking a program in university or college?

    asked by AL 92
  21. MATH


    asked by TIFFANY
  22. Computer Science

    Can anyone please write a basic c++ code for the following instructions? Congratulations! You’ve been hired by the Fly-By-Night-Engineering-Company, Your new supervisor asks you to write a C++ program that will manage a list of robotic sensors, stored in

    asked by Keisha
  23. math

    After looking at the results of her calculations, Naomi has decided to aim for $500,000 savings by the time she retires. She expects to have a starting salary after college of $25,000 to $35,000 and she has taken into acount all of the living expenses that

    asked by Lisa
  24. verbs

    what is a past tense and future tense verb

    asked by Anonymous
  25. English

    An author's viewpoint is shown as much by what is left out of a story as by what is included. Which of these details is not included in Breaking Through? a how he earned his scholarships b none of these choices are correct c how his family was able to

    asked by Rainbow
  26. alg

    Which expression represents the sum of the following? 5 / 2t + 1 + -1 / 4t^2 + 4t + 1 a)10t + 4 / (2t + 1)^2 b) 4 / (2t + 1)^3 c)10t + 1 / (2t + 1)^2 d) 4 / 4t^2 + 6t + 2

    asked by sean
  27. Chemistry 152

    For a certain reaction, the enthalpy change is -148.5 kJ, the entropy change is 256 J/K, and the free energy change is -250.1 kJ. At what temperature is the reaction occurring, in C? Choose one answer. a. 85 b. 102 c. 124 d. 158 e. 210

    asked by Car
  28. Chemistry 152

    For a certain reaction, the enthalpy change is -148.5 kJ, the entropy change is 256 J/K, and the free energy change is -250.1 kJ. At what temperature is the reaction occurring, in C? Choose one answer. a. 85 b. 102 c. 124 d. 158 e. 210 I keep using

    asked by Car
  29. Math 157

    how many polygon arrangements does a semi-regular tessellation have?

    asked by Jenna
  30. Government

    The "bureaucracy is often at odds with elected officials and their appointees, who by contrast often get elected or appointed on a promise to implement change. To minimize the effects of leaders who come and go, a bureaucracy will tend to seek power of its

    asked by Veronica
  31. Literature

    The theme of literature is usually stated right at the beginning. T/F? False? I just want to check it. Thank You so much! [:

    asked by Ally.
  32. physics

    Is it easier to exchange heat between a thermometer and air or between a thermometer and water.

    asked by college
  33. Accounting

    The income statement section of the worksheet of Smith Company for the year ended December 31, has 169,000 recorded in the Debit column and 193,434 in the Credit column on the line for the Income Summary account. What were the beginning and ending balances

    asked by Crystal
  34. kindergarten

    How can i teach reading to five year old child?

    asked by Anonymous
  35. english

    Have any of you read or watch the movie of West Side Story? If so, please help me with the question below, Thanks in advance. What characteristic best described Tony? A. intellectual B. idealist C. stupid D. angry E. None of the above I would say it's

    asked by Priscilla
  36. physical science

    A constant volume and mass of helium gas at 47°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?

    asked by Anonymous
  37. verb practice

    I am not under standing what this is wanting me to do. Can some one please help me? Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence.

    asked by Ashley
  38. alg

    find the difference. express your answer in simplest form. x^2 + 3 / x - 2x^2 + 5 / x a)-x^2 - 8 / 2x b)-x^2 - 2 / x c)3x^2 - 8 / 2x d) 3x^2 - 8 /x

    asked by sean
  39. Mass Communications

    I am looking for help with my final project in xcom 100 career center presentation that is due July 4 before midnight

    asked by Chris
  40. Chemistry 152

    For which of the following processes would the entropy change be positive? Choose one answer. a. Hg(l)(45C)----- Hg(l)(25C) b. H2O(l----H2O(s) c. He (g) (1 atm)------- He(g)(10 atm) d. I2(s)------I2(aq) e. Ag+ (aq) +Br-(aq)------AgBr(s) I figure that it

    asked by Car
  41. spainish

    How do you say Alquliar in spainish

    asked by Anonymous
  42. English

    When a character has an aside, he or she is speaking dirextly to another character. True or False? I know that aside is something a character says to either the audience or another character, which the rest of those on stage are not supposed to hear. So is

    asked by Anna
  43. Literature

    In Romeo and Juliet, what is the relationship between Juliet and the Nurse best described as A. like mother and daughter B. like two enemies C. like two girlfriends Is choice A corect? Thank you for checking.

    asked by Maria
  44. fisica 10mo

    sobre una rueda de radio r=0.5 m esta enrollada una cuerda que se desenrolla ejerciendo una fuerza de tracción contante F 50 nt como muestra la figura 1.1 en 2 seg se han desarrollado 4 m. Se pide calcula: a. La aceleración tangencial de un punto de

    asked by elizabeth
  45. English

    What is the theme of West Side Story? A. The prejudice is evil. B. All is fair in love and war C. Any friends you have are okay D. Get revenge for everything E. None of the above I think C and D are just wrong and B is not true at all. I would say it's A

    asked by Priscilla
  46. English

    Today's immigrants have both an easier and a more difficult life than Jimenez and his family. what is one way life is more difficult? a access to health care b crossing the border from Mexico c getting children enrolled in school Jimenez and his family

    asked by Rainbow
  47. English

    in the last chapter of breaking through, Jimenez' mother was most concerned with a papa's health b both of these choices are correct c jimenez' clothes i am very confused. when papa called mama to help him get dressed but not connect to his health in fact,

    asked by Rainbow
  48. business

    im trying to find the cost of development and production of glucose meter such as animal testing and clinical trials. Do you know any sites that will give me some info. I tried google but it didn't help

    asked by flame
  49. English

    Most of jimenez high school experiences were positive except a speaking at the rotary club b all c performing in the junior scandals d participating in los santitios club e running fot student body president my answer is a i just want to check it

    asked by Rainbow
  50. alg

    Find the LCD for the following rational expressions. -3 / x^2 - 2x + 1 2x / x^2 - 5x + 4 a)(x - 1) (x + 4) b)(x - 1)^2 (x - 4) c)(x - 1)^3 (x -4) d)( x - 1) (x - 4)

    asked by sean
  51. Math

    4x+3y=8 (6,-8) is this the solution

    asked by Anonymous
  52. Marketing

    Procedures that develop and analyze new information to help marketing managers make decisions are called:

    asked by Anonymous
  53. phys/ 210

    I need help in answering this question personality theories disussed in text i am using learning theory and trait theory comparing and contrasting these two theories

    asked by marie
  54. business

    im trying to look for do look alike glucose meter affect business. Its obviously yes but its so hard to find on google?

    asked by flame
  55. Chemistry

    I know mathematically I can write chemical reactions this way but in chemistry can I if now why? 2K + 2(H20) yields 2KOH + H2 2(K + H20) yields 2KOH + H2 can I also do this if not why? 2(CO) + O2 yields 2(CO2) O(2C + O) Yields 2(CO2) I don't see why I cant

    asked by Kate
  56. Calculus

    How do you factor (x^2+1)^(1/2)*(x^2-1)+((x^2+1)^(3))^(1/2)*(2x^2-2)?

    asked by Lauren