1. Math

    Two of the ten most expensive cars in the world are the BMW Z8 and the Mercedes Benz CL 600. The prices of these two cars differ by more than $10,000. The price of the Z8 is $130,645. a) Assuming that you do not know which model is more expensive, write an

    asked by Steph on September 27, 2012
  2. chemistry

    2 questions please: The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most negative oxidation number is -1. Write the electron configuration of chlorine and explain why these are limiting oxidation numbers

    asked by Derrick on May 12, 2012
  3. Math

    1. A car travels 17 miles in 20 minutes. What is the rate in miles/min. Do I just divide the two so the car is going 85 miles per minute? But is that the correct label or would it be mph? 2. Compare 9 ft. to 7 yards. Write the ratio as a fraction in lowest

    asked by Fugel on January 15, 2016
  4. statistics

    Heights of women have a bell-shaped distribution with a mean of 158 cm and a standard deviation of 8 cm. Using Chebyshev’s theorem, what do we know about the percentage of Women with heights that are within 3 standard deviations of the mean. What are the

    asked by slomomo on February 21, 2015
  5. algebra

    I really need help writing this out An overnight delivery service accepts packages of up to 165 inches in length and girth combined. (Girth is the distance around the package.) A package has a fixed girth of 53 inches. Determine (in terms of an inequality)

    asked by Zaire on February 13, 2011
  6. algebra

    if the gym charges a registration fee of $60.00 and a membership fee of $20.00 per month. and the manager waived the registration fee for 50 random people. write a expression to represent how much money the gym will make. after 6 months how much money will

    asked by David on September 10, 2018
  7. english

    read the following sentences and underline each word or phrase that signals a comparison or contast clue. circle comparison or contrast, depending on the clue. then write the meaning os each italicized word. 1.) We thought we were seeing the real painting,

    asked by Anna on September 22, 2010
  8. elementary statistics

    A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be

    asked by David on November 30, 2013
  9. CALCULUS - PLEASE HELP

    Water is flowing at a rate of 50 cubic meters per minute into a holding tank shaped like a cone, sitting vertex down. The tank's base diameter is 40 m and a height of 10 m. Write an expression for the rate of change of the water level with respect to time,

    asked by Anonymous on June 5, 2012
  10. elementary statistics

    A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be

    asked by David on November 30, 2013
  11. Physics

    A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.18 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric

    asked by ali on January 12, 2011
  12. Math

    I posted this problem the other day and someone answered it but when I checked my book I realized that I wrote the problem wrong. This morning when I posted I had put the wrong answer. The answer is suppose to be 1/8 but I don't understand how to solve the

    asked by Josh on January 23, 2010
  13. Chemistry

    CS2(g) + O2(g) CO2(g) + SO2(g) (a) Consider the unbalanced equation above. What is the maximum mass of SO2 that can be produced when 46.0 g of CS2 and 29.0 g O2 react? (b) Assume the reaction in part (a) goes to completion. Calculate the mass of excess

    asked by Tiffany on February 28, 2010
  14. chemistry

    How to calculate enthalpy change of the following reaction? : S + 2h2o >>> so2 + 2h2 given: s+o2 >>> so2 - enthalpy change = -296.8 kJ h2 + 1/2o2 >> h20 enthalpy change= -285.8kj I was trying to solve it myself but i got confused.. i know i have to change

    asked by olexandra on April 19, 2010
  15. precalculus

    For what values of theta 0

    asked by Anonymous on April 25, 2018
  16. Chemistry

    Carbon monoxide and hydrogen react according to the equation: CO(g) + 3H2(g) CH4(g) + H2O When 1.00 mol CO and 3.00 mol H2 are placed in a 1L flask at 1200K and allowed to come to equilibrium, the reaction mixture is found to contain 0.387 mol H2O. What is

    asked by Emily on April 29, 2015
  17. chemistry

    At 35 degrees C, 2.0 mmol of pure NOCI is introduced into a 2.0-L flask. The NOCI partially decomposes according to the following equilibrium equation. 2 NOCI = 2 NO + CI2 at equilibrium the concentration of NO is 0.032 mol?L. Use an ICE table to determine

    asked by Claudia on December 14, 2018
  18. trig

    A spring is attached to the ceiling and pulled 17 cm down from equilibrium and released. After 3 seconds the amplitude has decreased to 16 cm. The spring oscillates 13 times each second. Assume that the amplitude is decreasing exponentially. Find an

    asked by Tricia on August 17, 2014
  19. physics

    To make a bounce pass, a player throws a 0.60-kg basketball toward the floor. The ball hits the floor with a speed of 5.5 m/s at an angle of 72° from the vertical. If the ball rebounds with the same speed and angle, what was the impulse delivered to it by

    asked by !!!! on October 19, 2011
  20. Algebra 2

    Completing the square method allows you to solve any quadratic equation. For each of the following determine what number completes the square. I cannot find my notes on completing the square, can someone please help with these two problems? 1. x^2+8x 2.

    asked by Christian on May 21, 2007
  21. math

    solve each equation for 0=/

    asked by sh on February 15, 2009
  22. Physics

    A 2.0 kg particle is moving along the x axis to the left with a velocity of v= -6.0 m/s. Suddenly, between times t =0 and t = 4.0 x a net force = 3t^2 – 12t is applied to the particle, where F is in N and t is in s. Calculate the velocity of the particle

    asked by Julia on November 24, 2009
  23. math 111

    The overhead or fixed cost for the company is 1,000 per week. In addition, the cost of manufacturing each boat costs$200. Find an equation C=f(x) for the total cost per week where x is the number of boats manufactured in a week. b) Graph the total cost

    asked by tbcc on July 3, 2013
  24. Chemistry

    37.5 g of Fe2O3 is added to 240 cm^3 of HCl. The reaction occurs according to equation : 6HCl + Fe2O3 -> 2FeCl + 3H2O At the end of reaction, 5.5 g of Fe2O3 remain unreacted. Find A) calculate the molarity of HCl used B) calculate the mass of FeCl3

    asked by Lilo on June 28, 2014
  25. physics

    A bicycle has wheels with a diameter of 0.570 m. It accelerates uniformly and the rate of rotation of its wheels increases from 181 rpm to 260 rpm in a time of 19.9 s. Find the linear acceleration of the bicycle. i tried converting everything to linear to

    asked by tessa on February 21, 2015
  26. organic chem

    . Use the Henderson-Hasselbach equation: pH = pKa + log [A-]/[AH], where A- is the conjugate base and AH is the weak acid. Calculate the pH of an acetate buffer in which the acetate concentration [CH3COO-] is 3.5 times greater than acetic acid [CH3COOH].

    asked by meghan on February 7, 2013
  27. Chemistry

    In an experiment 2.750 g of magnesium is reacted with 2.571 g of oxygen gas according to the equation: Mg + O2 ==> MgO. What mass of the other reactant is in exess? You need equal number of moles of each. Which has the excess? moles Mg=2.750/molmassMg

    asked by Ashley on June 3, 2007
  28. Physics

    A ball is dropped from rest from the 4th story of a building, 14 meters off of the ground. How much time passes before the ball hits the ground? What is the ball’s velocity (speed AND direction) the split-second before it hits the ground? This answer is

    asked by Anonymous on September 17, 2017
  29. chemistry

    How would you prepare a 150.0mL of a 3.50 pH buffer solution using .500M NaOH and .500M HCOOH. I've gotten the base/acid ratio for the Henderson-H. equation. But now I'm not sure how to figure out the balance of solutions of HCOOH and NaOH to get both

    asked by Israel on March 7, 2011
  30. artificial sweeteners

    Do artificial sweeteners have any bad side effects? Yes. Read it all here, this article goes over the weakensses of the sweeterners. http://www.westonaprice.org/modernfood/sugarfree_blues.html Artificial sweeteners have no bad side effects, except for a

    asked by Anonymous on October 15, 2006
  31. english

    In my examination, I come across following one word substitutes. I know some of the answers which I have written below. please help me to write other answers. 1. accept as heir (adopt) 2. ability to endure 3. able to live bothe on land and in

    asked by Ramesh Reddy on November 27, 2011
  32. History

    All of the following were Union Army objectives leading up to the Battle of Shiloh except A. The seizure of major rail lines near the Mississippi-Tennessee line B. The continued control of major rivers in the South C. The continued division of the CSA into

    asked by Elizabeth on December 10, 2017
  33. English

    Could you please check these sentences, please? I'm not sure about the rephrase. 1)In the first stanza the poet remembers wondering aimlessly and alone in the countryside. All at once he was amazed by the sight of a crowd of daffodils dancing ad fluttering

    asked by Henry1 on May 30, 2011
  34. Algebra

    The cost in millions to remove x% of pollution in a lake modeled by C=6000/200-2x. What is the cost to remove 75% of the pollutant? What is the cost to remove 99% of the pollutant? For what value is this equation undefined?

    asked by Carla on September 1, 2010
  35. Math

    A square measure 9 feet on a side. If each side of the square is increased by 3 feet, how many square feet are added to the area? What are the steps in solving this math equation?

    asked by Aj on November 25, 2017
  36. CALCULUS!

    f(x)=(6x^3–9x^2–3x–1)/(4x^2+7x–3) . Find the equation of the non-vertical asymptote. y = ____3x/2 - 39/8_____ Does f(x) intersect its non-vertical asymptote? (yes or no) ___YES____ What is the smallest value of x at which f(x) intersects its

    asked by Brit on July 21, 2011
  37. Algebra (please help me)

    The cost in millions to remove x% of pollution in a lake modeled by C=6000/200-2x. What is the cost to remove 75% of the pollutant? What is the cost to remove 99% of the pollutant? For what value is this equation undefined?

    asked by Carla on September 1, 2010
  38. math

    The equation C = 500 + 50x describes the total cost of a wedding reception, where C is the total cost and x is the number of guests. What is the total cost for 125 guests?

    asked by crystal on October 13, 2011
  39. Accounting

    On June 30, 2011, Georgia-Atlantic, Inc., leased a warehouse facility from IC Leasing Corporation. The lease agreement calls for Georgia-Atlantic to make semiannual lease payments of $585,423 over a three-year lease term, payable each June 30 and December

    asked by Jessica on March 10, 2011
  40. Physics

    A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.77 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.04 s before

    asked by Mathew on February 2, 2012
  41. Physics

    A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.53 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.01 s before

    asked by Connor on September 20, 2013
  42. math

    automoniles arrive at the drive-through windom at a post office at the rate of 4 every 10 minutes. the average service time is 2 minutes. the poisson distributimes are exponentially distributed. (A) what is the average time a car is in the system? (b) what

    asked by mark on June 7, 2011
  43. Sequential and Selection Processing Control Struct

    You are an accountant setting up a payroll system for a small firm. Each line of the table in Appendix G indicates an employee’s salary range and corresponding base tax amount and tax percentage. Given a salary amount, the tax is calculated by adding the

    asked by IT210 on August 26, 2011
  44. Physics

    This is another problem that I need clarification on since no one seems to be of any help at my school, A pulley system is used to lift a 52- crate.Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to

    asked by Matthew on October 8, 2009
  45. Math

    Hi, I need urgent help with these 3 integrals problems ... been stuck on the questions and the deadline is Friday. Thanks a lot ! 1) For the green's theorem, Q: Using Green's theorem, evaluate the line integral F(r).dr counterclockwise around the boundary

    asked by Blur on April 5, 2007
  46. Grammar -- subject-verb agreement

    "Susannah Wheatley, wife of slaveholder John wheatley, took great interest in Phillis's education, and it was (she/her) who taught Phillis how to read and write English." We're to choose the appropriate verb for the subject (Susannah Wheatley), but I'm

    asked by Jack on September 25, 2007
  47. Trig

    A group of friends are going on a vacation together. They plan to rent a large house for $3000 and share the cost. They also estimate that the buying food for the week will cost $150 per person. Write a reciprocal function to calculate the cost per person

    asked by John on December 7, 2017
  48. Math

    Diegos class planning a field tripfor 25 students.They will go to aquarioum and then to science museum. Each ticket for science cost $2 more than each ticket to aquarium. Lunch for each student is $5 additional. Write and expression for total cost of

    asked by Darryl on September 10, 2017
  49. english

    A poem in the 1930-1960's that relates to "How To Kill A Mockingbird"?I have to write a five paragraph paper discussing how the poem relates to one of the following from To Kill a Mockingbird:themes,social,issues,or a character.I am having major problems

    asked by michelle on March 18, 2007
  50. Geography

    Some time ago, I posted up an essay that I had to write but its information was out of my book so i was told to make it in my own words. I have to mail out the exam today and I still havn't gotten anywhere with it!! I've tried to understand each of the

    asked by mysterychicken on October 12, 2009
  51. algebra

    Preview: ... 2y=2 and y=1 are the same line. Part II: Greener Lawns C=$200 + 50h; Lawns for Less C=$300 + 25h 200+50h = 300+25h 25h=100 h=4; both plans cost the same if you use the company for 4 hours. If you use them for less than 4 hours you should go

    asked by Anonymous on June 20, 2011
  52. Math

    Write a number that has a hundreds digit less than 7, a tens digit less than 5, a tenths digit one more than its tens digit, a thousandths digit twice the tens digit, and other digits of your choice.

    asked by Penny on September 30, 2012
  53. French

    I have to construct a sentence in the passive indicative. I googled "French Passive Indicative" and everything was in Latin, not in French. Could you provide me with an example of how to write in the passive indicative?

    asked by Shea on May 2, 2011
  54. Math

    How do you write a number that has a hundreds digit less than 7 , a tens digit less than 5 ,a tenths digit one more than its tens digit , a thousandths digit twice the tens digit , and other digits of your choice?

    asked by Mhyree on October 3, 2011
  55. algebra

    Jim is paid for overtime when he works more than 40 hours per week. Write an expression for the number of hours he works overtime when he works h hours.

    asked by Alex on September 6, 2012
  56. Chemistry

    A volume of 60.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 25.2 mL of 1.50M H2SO4 was needed? The equation is 2KOH+H2SO4-->K2SO4+2H2O. I cant seem to

    asked by Paris on June 25, 2011
  57. chemistry

    Barium Nitrate is a not very soluble nitrate. Calculate the Ksp (at 25 degrees) from the following ΔG's: Ba2+ = -561kj/mole NO3 1- = - 109kj/mole Ba(NO3)2 = - 797 kj/mole I did the first step and I ended up with dGrxn = -127 kj/mol. When I plugged it into

    asked by Viki on May 4, 2012
  58. Statistics

    x3 = −16.2 + 4.0x1 + 9.4x4 − 1.3x7 Suppose that n = 14 data points were used to construct the given regression equation and that the standard error for the coefficient of x4 is 0.963. Construct a 90% confidence interval for the

    asked by Amy on May 6, 2019
  59. Chemistry

    A strip of zinc metal was placed in a beaker that contained 120mL of a solution of copper(2) nitrate, Cu(NO3)2(aq). The mass of the copper produced was 0.813g. Find the initial concentration of the solution of copper(2)nitrate. Can u help me out with

    asked by Kristien on March 5, 2013
  60. Chemistry

    Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE

    asked by Hank on November 23, 2014
  61. Physics

    A hoop starts from rest at a height 1.8 m above the base of an inclined plane and rolls down under the influence of gravity. What is the linear speed of the hoop's center of mass just as the hoop leaves the incline and rolls onto a horizontal surface?

    asked by David on February 16, 2016
  62. Physics

    If an object is thrown in an upward direction from the top of a building 1.60 x 102 ft. high at an initial velocity of 21.82 mi/h, what is its final velocity when it hits the ground? (Disregard wind resistance. Round answer to nearest whole number and do

    asked by Alexis on November 7, 2012
  63. Algebra II

    Growth and Decay Dave bought a new car 8 years ago for $8400. Tobuy a new car comparably equipped now would cost $12,500. Assuming a steady rate of increase, what was the yearly rate of inflation in car prices over the 8-year period? Is there an equation

    asked by Anonymous on May 20, 2010
  64. math

    Answer by factoring a quadratic equation. The length of an open-top box is 4 cm longer than its width. The box was made from a 480-cm^2 rectangular sheet of material with 6cm by 6cm squares cut from each corner. The height of the box is 6cm. Find the

    asked by Jane on April 18, 2012
  65. algebra

    Legolas shoots a flaming arrow straight up into the air (from a distance of 2.6 meters from the ground) at 42 meters per second. The gravitational pull of the Earth is about 4.9 meters per second squared. Which quadratic equation correctly models this

    asked by kylie on January 13, 2019
  66. Physics

    A block of mass m=25 kg is hung by a massless rope of length L=1.90 m from the ceiling of an elevator. The elevator has a downward acceleration of a=2.20 m/s^2. When the pendulum is set in a small amplitude oscillation, the period T of the pendulum is: A)

    asked by Maddie on May 2, 2016
  67. FRENCH --Venir

    Based on the illustrations, write sentences with VENIR DE to tell what everyone has just done. 1. Nous venons de faire du shopping. 2. Je viens de manger mon sandwich au jambon. 3. Ils viennent de téléphoner. 4. Tu viens de préparer une tarte. 5. Elle

    asked by Sydney on April 14, 2011
  68. Biology

    What is an adrenalin receptor? For a bio project at school i have to write the gene name, the # of amino acids, the # of peptides, the tissue signal, the role, the interactions, the active site/substrate, the disease/cures/inhibitors. i've googled

    asked by anonymous on October 24, 2010
  69. Math/Science(Short Question 10th grade))

    [History Homework] Please answer 1. What are 2 pieces of technology essential today? 2. If you could give a prehistoric person one item from today what would it be? 3. Why is writing important for civilizations? 4. Why is theater/drama important to

    asked by Bone on September 15, 2011
  70. Social Studies

    “Do not put such unlimited power into the hands of the husbands. Remember, all men would be tyrants if they could. If particular care and attention is not paid to the ladies, we are determined to foment a rebellion, and will not hold ourselves bound by

    asked by Alice on October 16, 2018
  71. english

    Instructions Write a poem of at least eight lines using a set meter and rhyme scheme. You may, if you wish, attempt a sonnet, a villanelle, or a ballad, but you will probably find it easier to design your own form. Quatrains ofabab, cdcd or abcb, bcdb are

    asked by Courtney on June 2, 2010
  72. algebra 2

    In 1862, two companies were given the rights to build a railroad from Omaha, Nebraska to Sacramento, California. The Central Pacific Company began from Sacramento in 1863 and averaged 8.75 miles of track per month. Twenty four months later the Union

    asked by Denice on September 10, 2017
  73. social studies

    The homework was that you had to write a word that starts with the letter you get and it has to be about social studies.You have to describe the word and draw a picture about it. X ( a word that starts with x ) (description) (picture) The reason why i am

    asked by lexie bowles on August 18, 2014
  74. algebra

    A salesperson earns a salary of $500.00 per week, plus a commision of 2% of her total weekly sales. write an algebraic expression that computes the total weekly salary. Let m represent the total weekly sales.

    asked by stephanie on December 14, 2008
  75. writing skills

    When you are told time after time that there are no jobs. And it is time _____________ for some creative thinking and acting. Which of the following is the best way to write the underlined portion of these sentences? If you think the original is the best

    asked by piper on June 28, 2016
  76. Math- Algebra

    5. A box can hold a maximum of 60 comic books. If comic books are bundled together in groups of 8, write and solve an inequality to find the maximum number of bundles of comic books that the box can carry.

    asked by Harish on January 28, 2016
  77. Math

    1.A restaurant surveys 60 of its customers about their new menu. 48 of the customers that take the survey prefer the new menu. A.Which value is unknown in this problem: the part, percent, or whole? B.Write and solve the proportion to find the percent of

    asked by Francis on April 16, 2015
  78. law

    there are two kinds of law in south africa.write a paragraph in which you identify these two kinds of sources of law;name the examples of sources of law that belong to each kind;and indicate the differences betweem these teo kinds of sources of law.

    asked by nancy on March 16, 2014
  79. science

    write up a conrol group and a experimaental group Example: Control:Plant with no fertilizer Eperimental groups:plant with fertilizer. The point of the control is to prove that the IV did something to the plant. Here's another example:

    asked by jessika on September 14, 2006
  80. Algebra

    Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is

    asked by Melanie on July 7, 2014
  81. Math

    Suppose that an object is 100 lbs when it is at sea level. find the value of c that makes the equation true. (Sea level is 3963 miles from the center of the earth.) Use the value of c you found in the previous question to determin how much the object would

    asked by Gamel on March 10, 2008
  82. Chemistry

    This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please

    asked by Matthias on September 29, 2012
  83. Chemistry

    A solution of hydrogen peroxide, H2O2, is titrated with potassium permanganate, KMnO4, according to the following equation: 5H2O2 + 2KMnO4 + 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4. It requires 46.0 mL of 0.145 Mol/L KMnO4 to titrate 50.0 mL of the solution

    asked by Brett on July 3, 2014
  84. Chemistry

    This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please

    asked by Matthias on September 29, 2012
  85. Chemistry

    A solution of hydrogen peroxide, H2O2, is titrated with potassium permanganate, KMnO4, according to the following equation: 5H2O2 + 2KMnO4 + 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4. It requires 46.0 mL of 0.145 Mol/L KMnO4 to titrate 50.0 mL of the solution

    asked by Dan on July 3, 2014
  86. Chemistry(Please help)

    For the reaction, 2 SO2(g) + O2(g) == 2 SO3(g), at 450.0 K (Kelvin) the equilibrium constant, Kc, has a value of 4.62. A system was charged to give these initial concentrations, (SO3) = 0.254 M and (O2) = 0.00855 M, and (SO2) = 0.500 M. In which direction

    asked by Hannah on March 14, 2012
  87. physics

    The torques acting on the crane boom can be computed about anaxis passing through the top of the boom. (this is the place wherethe spring scale and mass hanger connect to the boom) apply thesecond condition for equilibrium to the crane boom and derivethe

    asked by Anna on November 28, 2012
  88. Chem

    Solid magnesium metal reacts with chlorine gas according to the following equation: Mg + Cl2 --> MgCl2 What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2 use the masses to two decimal places on the chart in the

    asked by Mary on October 18, 2013
  89. Physics

    A 3.9 g bullet leaves the muzzle of a rifle with a speed of 311 m/s. What total constant force is exerted on the bullet while it is traveling down the 0.82 m long barrel of the rifle? I converted 3.9 g to .0039 kg Used the equation t=d/r

    asked by Rebecca on March 24, 2011
  90. Chemistry II (College)

    How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas

    asked by Tim on March 12, 2010
  91. Physics

    A lead ball, with an initial temperature of 25.0oC, is released from a height of 125.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it

    asked by Jake on February 7, 2019
  92. math

    A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. set h=6 rearrange the quadratic equation to get

    asked by Shay on January 18, 2007
  93. CHEM

    am lost. I have to create a buffer using NH4CL and 0.10 M NH3. I have to chose how much of the reagent to use in order to get a concentration between 0.01 and .5 M. Then after I come up with the recipe for that I have to calculate the pH based on the

    asked by Erica on April 5, 2016
  94. AP Chem

    Hey guys! I'm not really stuck on this problem, but I was wondering if someone could look it over to make sure that what I did makes sense. Thank you: 1) Balance this equation. What is the coefficient in front of I2? IO− + I− --> I2 in acidic solution

    asked by Allie on October 25, 2015
  95. Chemistry

    The relative number of elements and compounds in a chemical equation are represented by either coefficients, subscripts, charges of phase symbols. I think it's coefficients, but is this right? My other question is that if you start a reaction with four

    asked by Khzyata on April 18, 2009
  96. Chemistry

    Balanced Chemical Equation: 1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H20(g) If you start with: 5.0 x 10^4g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yielded)? 2) How many moles of water can be produced? 3)

    asked by Roger on November 19, 2010
  97. chemistry

    At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 2NO(g) 3 + 2 + 2 ⎯⎯→ 3 . If all of the nitric acid produced by

    asked by bob on March 21, 2010
  98. Chemistry

    Balanced Chemical Equation: 1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H20(g) If you start with: 5.0 x 10^4g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yielded)? 2) How many moles of water can be produced? 3)

    asked by Roger on November 19, 2010
  99. chem

    The following equation describes the oxidation of an acidified solution of sodium oxalate (Na2C2O4) by potassium permanganate(KMnO4) 5C2O4 + 2MnO4 + 16H2SO4 --> 10CO2 + 2Mn + 16HSO4 + 8H20 What volume of 0.127M sodium oxalate in sulphuric acid will react

    asked by tomi on April 7, 2009
  100. College Math

    Hooke's Law the table shows the distance D that a spring stretches when a weight W is hung on it. W (pounds 2 6 9 15 D (inches) 1.6 4.8 7.2 12 (a.) Do the data represent direct or inverse variation? Explain. (b.) Find an equation that models the data. (c.)

    asked by Shin on April 28, 2011

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