1. physics

    An open barge has the dimensions l=22 m, w=40 m, and h=12m. If the barge is made out of 4.0 cm thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in fresh water without sinking? Is there enough room in the

    asked by wilfred on October 26, 2010
  2. Math

    Peter received a six month post dated check for 100,000 (the check can only be cashed after six months) he offers it to a friend for 92,000 .His friend's money is presently earning 10% compounded monthly.If there is 20% withholding tax on interest ,which

    asked by Queen on August 8, 2016
  3. Math

    Hello everybody! May I ask you a big favor? I need help. What I have is: A bag contains marbles of three different colors with at least three marbles of each color. Three marbles are randomly selected, without replacement. How many different color

    asked by mathstudent205 on January 14, 2013
  4. physics help please

    Consider a system in which 3.60 mol of an ideal monatomic gas is expanded at a constant pressure of 101 kPa from an initial volume of 2.15 L to a final volume of 3.87 L. (b) Find the change in temperature for this process. ? K (c) Determine the amount of

    asked by kelsey on December 14, 2008
  5. PHYSICS

    Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 117-km race in

    asked by Tiffany on February 24, 2011
  6. physics

    Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 123-km race in

    asked by heather on February 28, 2011
  7. math

    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 dimensions of the box. Please show me in detail

    asked by Jane on April 21, 2012
  8. math complicted question please help

    ok umm it takes pam 45 mitues to drive to work and 60 minutes to drive home from work.write the ratio of he time pam spends driving home from work to the time she spends driving to work in tree differnt ways.(30 points)

    asked by puchupuchu gaming on December 4, 2015
  9. Chemistry Very Urgent!!

    A 0.035 M solution of a weak acid (HA) has a pH of 4.88. What is the Ka of the acid? HA ==>H^+ + A^- Ka = (H^+)(A^-)/(HA) pH = -log(H^+) You know pH. Convert that to (H^+). (H^+)=(A^-) so plug those into the expression for Ka. (HA) = 0.035 M - (H^+). Plug

    asked by Paul on April 2, 2007
  10. Physics,Question ,Solved but about Units?

    These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total

    asked by Katherine on October 10, 2012
  11. algebra

    how much of a 25% solution should to be added to 35% solution to get 40 liters of 28% solution

    asked by jeff on July 21, 2009
  12. chemistry

    What is the molarity of a solution when 3L of a 4M solution is mixed with 3L of a 6M solution?

    asked by lyne on March 3, 2009
  13. Math

    A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used?

    asked by Alyonka on February 12, 2013
  14. algerbra

    84=12(3y+1) a.The solution is y= b.The solution is all real numbers c.There is no solution

    asked by Connie on November 17, 2011
  15. Chem please help

    What does the second law of thermodynamics say about entropy? A. Only changes in entropy can be measured. B. The entropy in a system is zero at equilibrium. C. The entropy in a system and its surroundings tends to increase. D. Entropy cannot be created or

    asked by Morgan on November 24, 2014
  16. physics

    A 54.5 kg. skateboarder starts out with a speed of 1.90 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The

    asked by s on November 21, 2011
  17. waves (physics)

    Two sinussoidal waves identical except for phase travel in the same direction along a string and interfere to produce a resultant wave given by y(x,t)= (3.0mm) sin(20 rad/m)x - 4.0rad/s t + 0.820 rad) with x in meters and t in seconds. What is a) the

    asked by Susane on February 6, 2007
  18. math

    At a Little League game, three fourths of the people in the stands were kids and the rest were parents. If the ratio of dads to moms is 3:4, what percent of the people attending the game were moms? (Round your answer to the nearest percent.) Please show

    asked by lexis green on May 14, 2012
  19. Medical Staff Service

    i need help on someone one showing me how to set up a proctorship form. for example i need to prepare a form showing how the proctorship process is completed for a surgeon who recently obtained staff privileges instead of doing the surgeon show me a

    asked by Nichole on November 18, 2009
  20. Chemistry

    How much energy (in kilojoules) is released when 29.0 g of ethanol vapor at 88.0 ∘C is cooled to -10.0 ∘C? Ethanol has mp = -114.5 ∘C, bp = 78.4 ∘C, ΔHvap = 38.56 kJ/mol and ΔHfusion = 4.60 kJ/mol. The molar heat capacity is 113 J/(K⋅mol) for

    asked by Sci Guy on January 20, 2017
  21. statistics

    Given that x is a normally distributed random variable with a mean of 60 and a standard deviation of 10, find the P(56 < x 56.)Please write your answer in a complete sentence.

    asked by Rachel on July 23, 2012
  22. Chemistry

    Assume that you had 15 nuts (N) and 10 bolts (B). How many N2B molecules could you make by screwing two nuts onto each bolt? There are two nuts for each bolt. We have 15 nuts so we can make 7. I'm supposed to "Show all calculation for full credit." Is

    asked by Trevor on March 5, 2009
  23. physical science

    When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find the number of moles of oxygen that are needed to form 6 mol of Fe2O3. Show your work.

    asked by Megan on January 7, 2013
  24. Science/Math

    If a barrier island that is 1km wide and 10km long loses 1.5 m of its width per year to erosion by a longshore current, how long will the island take to loose one-fourth of its width. Please show step by step how to work this problem. Thank you

    asked by Dan1 on February 27, 2009
  25. algebra am i right

    Find the volume of a right circular cylinder whose base has an area of 6 cm^2 and whose height is 17 cm. [A] 153ð cm^3 [B] 612ð cm^3 [C] 102 cm^3 [D] 153ð cm^2 [E] None of these i think its C Please show your work. That's the right answer, but we'd like

    asked by cassii on September 27, 2006
  26. chemistry

    One has a solution Sa of ethanoic acid of concentration Ca=1×10^-2 mol/l and pH=3.4  One mixes a volume Va=60ml of the solution Sa of ethanoic acid with a volume Vb1=20ml of the Sb1 solution of ammonia of concentration Cb1=2×10^-2 mol/l. The pH is 5 One

    asked by vicky on December 27, 2016
  27. chemistry

    One has a solution Sa of ethanoic acid of concentration Ca=1×10^-2 mol/l and pH=3.4 One mixes a volume Va=60ml of the solution Sa of ethanoic acid with a volume Vb1=20ml of the Sb1 solution of ammonia of concentration Cb1=2×10^-2 mol/l. The pH is 5 One

    asked by vicky on December 25, 2016
  28. Physics

    A car with engine trouble slides 85 meters up along a 14 degree ramp before coming to a stop. If the coefficient of friction between the tires and the road is 0.9, what was the velocity of the car at the bottom of the ramp? I'm not looking for a solution

    asked by Ed on March 10, 2013
  29. chemistry

    I have two questions regarding enthalpy of reactions: 1.) Care must be taken when dissolving NaOH pellets in water because the temp. can rise dramatically. Taking NaOH as system, what can be deduced about the signs of the entropy of system and

    asked by Rebecca on May 2, 2014
  30. 205

    What type of introduction does the writer use? What is the impact of that kind of introduction in this essay? The work that we do and the attitude with which we approach and complete our assigned tasks have a significant impact on the way we define

    asked by Anonymous on July 9, 2008
  31. English

    Taking a computer home to complete a work-related assignment. Is it ethical or unethical? When an individual takes a job they ensure their employer that they will work their very best, and distribute quality work. By any means the worker is required that

    asked by Jimmy on September 12, 2009
  32. Physics

    A stunt-motorcyclist wants to jump over a row of cars that is 94 meters long. In order to clear the cars, how fast must he be going when he hits a ramp that is inclined 30 degrees? Work so far: Delta x= 94m Ax= 0 m/s2 Ay=-9.8 m/s2 Trying to find: V initial

    asked by 2016 on October 5, 2014
  33. English

    I still have to check a few other sentences on the same subject. Thank you very much in advance,Writeacher. In particular sentences 4-5-6. 1) If I work at the passion, then it is the job itself that motivates me. 2) I will take up working tomorrow. (is

    asked by Matthew on April 11, 2012
  34. CHEMISTRY

    Hello, I am having trouble balancing this redox reaction WITHOUT using the half-reaction method. I believe this is because not all of the elements are in (aq). BrO3-(aq) + N2H4(g) --> Br-(aq) + N2(g) Br is reduced by a factor of 6. N is oxidized by a

    asked by Vanessa on April 21, 2010
  35. Social Studies

    A system in which a series of workers and machines work to add individual parts to a product is known as a(n)_______and it ______. a. assembly line/helped Georgia's economy by increasing production rates*** b. installment plan/helped consumers purchase on

    asked by Anonymous on March 5, 2018
  36. math

    A lab needs a 20 liters of a 15% acid solution. The lab only has a 10% acid solution and a 30% acid solution. How much of the 10% acid solution will they need to mix with the 30% solution to obtain 20 liters of a 15% solution?

    asked by Anonymous on April 2, 2013
  37. Science Please

    Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of

    asked by SmartyPants on March 22, 2015
  38. Science Help

    Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of

    asked by YOLO on March 22, 2015
  39. Science Please

    Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of

    asked by SmartyPants on March 22, 2015
  40. Chemistry

    What is the pH of a 0.0054 molar solution of Oxalic Acid. K1= 6.5E-2, K2= 6.1E-5? Here's what I have so far for K1: 6.5E-2 = (x)(x)/ (x-0.0054) x= 0.0059 pH = -log(0.0059) = 2.23 K2 is pretty much the same, but I have to work it out. 6.1E-5 = (x)(x +

    asked by James on March 29, 2010
  41. Georgia's Government

    Please put an answer or something that can lead me to it for these questions. Also if possible can you put all of the answers to the assignment, thank you. The judicial system of Georgia has two primary functions: to interpret the laws of the state, and to

    asked by Bookoo the mookoo on February 5, 2019
  42. Math Help Please

    I got this problem today in school, and I don't know how to go about soving it. Can someone show me. Thanks. Here it is. The distance s(t) between an object and its starting point is given by the antiderivative of velocity function v(t). Find the distance

    asked by Johnathan on May 14, 2008
  43. chemistry

    please help solve this problem now. I really need an answer. thank you When one mole of KOH is neutralized by sulfuric acid, q=-56kJ. At 22.8 C , 25.0 mL of 0.500 M H2SO4 is neutralized by 50.0 mL of 0.500 M KOH in a coffee-cup calorimeter. What is the

    asked by ogi on March 3, 2012
  44. World History Answer Check (Ms. Sue)

    1. What is the Socratic method and what is its legacy? A: The Socratic Method is a form of inquiry and debate, usually via rhetorical questions, between two or more individuals of opposing perspectives that aims to stimulate critical thinking and either

    asked by Victoria on September 15, 2014
  45. physics

    The entropy of a system is a measure of that system's disorder. Why is it appropriate to describe a laser as an entropy-reducing device? I take some issue with the first sentence. It is better, in my view, to describe entropy as a measure of chaos. As

    asked by anonymous on April 27, 2007
  46. Physics

    A mass-spring system undergoes simple harmonic motion with amplitude A.Does the total energy of the system change if the mass doubled but the amplitude is unchanged? Does the kinetic and potential energies depends on the mass? Explain.

    asked by Anyam on November 7, 2016
  47. Algebra

    Describe the system 6x-2y=10 and 9x-3y=8 as consistent and independent, consistent and dependent, or inconsistent. Explain. When you multiply the second equation by 2/3, both equations become equal. Therefore there are many solutions. The system is

    asked by Jon on February 26, 2008
  48. Physics

    Can you please show all your work so that I can understand how the problem is solved? In the Challenger Deep of the Marianas Trench, the depth of water is 10.9 km and the pressure is 1.16 x 10^8 Pa. a) if a cubic meter of sea water is taken from the

    asked by Amanda on July 13, 2010
  49. mat 117/algebra

    2/(5w+10 )- 3/(2w-4) please show me how to work this problem. I assume this is some sort of combine the fractions, as there is nothing equal to the sentence above. factor out 1/((5w+10)(2w-4)) 1/((5w+10)(2w-4)) * ( 2*(2w-4) - 3(5w+10) ) do the

    asked by Diana on July 6, 2007
  50. Algebra

    A manufacturer of shipping boxes has a box shaped like a cube. The side length is (5a + 4b). What is the volume of the box in terms of a and b? Show your work. (5a+4b)^3 =(5a+4b)(5a+4b)(5a+4b) =(25a2+40ab+16b2)(5a+4b) = 125a^3 + 100a^2b + 200a^2b + 160ab^2

    asked by Alexa on February 17, 2016
  51. physics

    A crate of weight Fg is pushed by a force on a horizontal floor. (a) If the coefficient of static friction is μs, and is directed at angle θ below the horizontal, show that the minimum value of P that will move the crate is given by the following

    asked by greg on October 17, 2011
  52. Algebra

    During a hurricane evacuation from the east coast of Georgia, a family traveled 260 miles west. For part of the trip, they averaged 70 mph, but as the congestion got bad, they had to slow to 20 mph. If the total time of travel was 9 hours, how many miles

    asked by Leslie on October 9, 2011
  53. math

    Calculate the average age of people that live in your house. How would the average change if a 90 year old grandmother lived with you? The ages of the people who live with me are 1, 7, 27, 32, 49 and my age 9. But I do not know how to show my work.

    asked by GL on August 13, 2012
  54. math

    A radio signal travels at 3 . 00 ⋅ 10 8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3 . 54 ⋅ 10 7 meters? Show your work.

    asked by Leapordclaw on May 22, 2019
  55. geometry

    Find the values of x and y that make the quadrilateral a parallelogram. Show all your work. a parallelogram is drawn with opposite sides of 4 times y minus 1 and 2 times y plus 7. The second set is 3 times x plus 1 and 4 times x minus 2

    asked by Anonymous on October 17, 2010
  56. math

    Norman wanted to bowl a strike, but to do so he needed to cause his bowling ball (mass of 5 kg) to accelerate at 15 m/s2. How much force does Norman need to exert on his bowling ball to get a strike? Show your work.

    asked by Anonymous on November 4, 2015
  57. math

    when planting trees in a forest, the US Forest Service recommends giving each seedling about 1/200 acre on which to grow. About hw many seedling should be planted in 1/3 of an acre? How would I show my work on this? would it be 1/3 x 200/1 = ?

    asked by kyle on September 18, 2012
  58. Math

    Ernie wants to fence in a rectangular play yard for his two dogs. He has 12 pieces of fence that are one unit each. What are the dimensions of the largest play yard that Ernie could make? Show your work

    asked by Anonymous on August 21, 2014
  59. Algebra

    Ok, so then does this look correct? -Find the area of a triangle in which the base measures 8.5 centimeters and the height measures 3 centimeters less than the base.- My answer: Area= 23.375cm squared (if you would like, I could show my work) Thank you so

    asked by Jamie on September 15, 2007
  60. AP Chem

    Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.054 moles of sulfuric acid is mixed with water to make 667 milliliter of solution,what is the molarity of H+? Answer in units of M doing mole/liter doesn't work

    asked by Nick on April 1, 2012
  61. Algebra 2

    Given the line below. Write the point-slope form of the given line that passes through the points (0, 3) and (4, 0). Identify (x1, y1) as the x-intercept of the line. Include your work in your final answer. Type your answer in the box provided or use the

    asked by vfgvljk on November 19, 2016
  62. Chemistry- Dr.Bob222

    I do not quiet understand what you said. Could you show your work. What is the solubility of AgCl in 10 M NH3? The Kf of Ag(NH3)2+ from AgCl(s) in aqueous NH3 is 0.0031, which is for the balanced reaction shown below. AgCl(s) + 2 NH3(aq) → Ag(NH3)2+(aq)

    asked by Nevaeh on May 7, 2016
  63. Equations Question

    A mother is twice as old as her daughter now, but ten years ago, she was 3 times as old as her daughter. Fins their ages at present. I tried to form an equation: 2x-10=3x, but that didn't work. Could someone help me forma working equation for it, and I can

    asked by Michelle on February 5, 2007
  64. science

    A standard addition method is used to determine the concentration of ethanol in an unknown sample. Six 10 mL aliquots of the unknown are drawn from the processing vat. An aqueous solution of ethanol is standardized to have 1.57 g/L. This standard is

    asked by asery on May 5, 2016
  65. Physics

    Could someone try to help me solve those 3 questions by giving me clues or equations? With what speed (SI Units) must a ball be thrown directly upward so that it remains in the air for 12.5 second? An object of mass 197kg is at rest. If a force of 2.5N is

    asked by cool on January 27, 2010
  66. POL201

    In Ronald Reagan’s version of new federalism, the goal was to return power back to the states through @The answer can be found in “New Federalism II, 1982-Present.” A) deep cuts in federal spending. B) the Great Swap. C) orders to the states to take

    asked by Danelle on December 1, 2014
  67. Physics

    A mass is suspended from a vertical spring and the system is allowed to come to rest. When the mass is now pulled down a distance of 76mm and released, the time taken for 25 oscillations is 23s. Find the displacement of the mass from its rest position 0.6s

    asked by Amy on December 30, 2012
  68. Social Studies

    Which describes a belief of the progressive movement? (1 point) the belief that government could correct the ills of society the belief that individual citizens could work to improve social problems the belief that business and the free enterprise system

    asked by Archy on April 30, 2015
  69. Social Studies

    Which describes a belief of the progressive movement? (1 point) the belief that government could correct the ills of society the belief that individual citizens could work to improve social problems the belief that business and the free enterprise system

    asked by Anonymous on March 7, 2016
  70. Improving Your Writing

    Background: Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides

    asked by Babs on August 14, 2012
  71. social studies

    For what main reason do consumers buy goods and services? A to make money to save for later B to show show support for free trade C to help grow the economy D to satisfy their wants and needs(?)

    asked by nina on August 19, 2015
  72. physics

    1. Calculate the work done on the system when 1.00 mol of gas held behind a piston expands irreversibly from volume of 1.00dm cube to a volume 10.00dm cube against an external pressure of 1.00 bar. 2. A perfect gas expand reversibly at a constant

    asked by Cali franco on April 20, 2015
  73. Big Review (2 posts in 1)

    How many grams of propane are in a 35L container at 40 deg Celsius and 900 torr? 40 deg C = 40 + 273K = 313 K 900 torr/768 torr = 1.2 atm (when do I convert to atm? I did it here simply to ease calculations) Propane: C3H8 --> M.W. = 44.1 g PV=nRT where R=

    asked by Kizner (chem) on June 14, 2006
  74. Mathematics

    Twelve man take 6 hours to finish a piece of work. After the 12 men have worked for 1 hour, the contractor decides to call in 8 men so that the work can be completed earlier. How many more hours would 20 men take to complete the remaining work?

    asked by Celina on May 28, 2012
  75. algebra

    The sum of two numbers is 70. One number is 10 more than twice the other number. Using Elimination find the numbers.

    asked by Justin on February 26, 2015
  76. Algebra

    Please solve as polynomial to third degree: the product of three consecutive odd numbers is 6,783. What are the numbers? The solution being 17, 19, and 21, what are those numbers when considering: x*(x+2)*(x+4)=6,783? Multiplied out: x^3+6*x^2+8*x-6,783=0

    asked by Wayne on March 27, 2013
  77. Calculus Help Please Urgent!!!

    A cone-shaped paper drinking cup is to be made to hold 30 cm^3 of water. Find the height and radius of the cup that will use the smallest amount of paper. (Round your answers to two decimal places.) Height = ? Radius = ? Show work please!!!

    asked by Patrick on April 15, 2014
  78. Algebra

    Is my answer correct? Evaluate the exponential equation for three values of x greater than -4, three values of x smaller than -4, and at x = -4. Show your work. Use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to

    asked by Bobby on June 15, 2010
  79. MATH

    Assume that the population of heights of male college students is approximately normally distributed with mean of 72.83 inches and standard deviation of 6.86 inches. A random sample of 93 heights is obtained. Show all work. (A) Find the mean and standard

    asked by Jen on November 3, 2011
  80. Physics :)

    A block of iron at 39.0°C has mass 2.30 kg. If 3.50×104 J of heat are transferred to the block, what is its resulting temperature? The specific heat of iron is 449 (J/kg*K) Someone else had this question on here but I cannot get the right answer from the

    asked by Taylor on June 20, 2012
  81. Chemistry Help

    You are required to make 500 mL of a buffer solution with pH = 5.0 and a total acetate concentration of 0.1000 M. You are supplied with solid sodium actetate (CH3COONa) and 2.00 M hydrochloric acid. What mass of sodium acetate and what volume of

    asked by John on December 6, 2016
  82. algebra

    Find the point-slope form of the line that passes through given the point and has the given slope.Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution. (0, 0) m = 2

    asked by Shannon on February 10, 2016
  83. Geography

    If you left New Orleans ( 30 degrees N, 90 degrees W) at 4:00 am on Friday Dec. 31, and traveled for 12 hours before arriving in Baku, Azerbaijan ( 40 degrees N, 30 degrees E) , at what time and on what day would you arrive in Baku? ( show work pleas)

    asked by matt on January 30, 2007
  84. Geometry

    A regular hexagon is circumscribed about the ring surrounding the clock face. The diameter of the ring is 10in. Find the perimeter if the clock face. Please included work/steps to solve. Thanks!

    asked by Marisa on May 22, 2012
  85. Math

    The blood vascular system consists of blood vessels (arteries, arterioles, capillaries, and veins) that convey blood from the heart to the organs and back to the heart. This system should work so as to minimize the energy expended by the heart in pumping

    asked by sam on November 12, 2015
  86. Math

    The blood vascular system consists of blood vessels (arteries, arterioles, capillaries, and veins) that convey blood from the heart to the organs and back to the heart. This system should work so as to minimize the energy expended by the heart in pumping

    asked by jeff on November 12, 2015
  87. Chemistry

    Methanol, CH3OH, is produced on an industrial scale from carbon monoxide and hydrogen. At the temperatures used, gaseous methanol is formed according to the following thermochemical equation: CO(g)+ 2H2(g) CH3OH(g) £H = -90Kj 1. State Le Chateliers

    asked by Adam on March 2, 2007
  88. Chemistry

    I am designing a procedure for a lab where I have to use indicators to create an acid-base table from 6 solutions. I am just wondering...if I put a drop of indicator into a solution, do I have to dispose of it and obtain new solution before putting in

    asked by Stuck on May 9, 2010
  89. chem

    A sample of 7.80L of NH3(ammonia) gas at 22 degrees Celsius and 735torr is bubbled into a 0.350L solution of 0.400M HCl (hydrochloric acid). The Kb value for NH3 is 1.8x10-5. Assuming all the NH3 dissolves and that the volume of the solution remains at

    asked by tomi on April 16, 2009
  90. chemisrty

    A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL.

    asked by jesse on June 18, 2014
  91. Hunt

    Wyatt and Allyson were asked to solve a percent problem using the number 13 and 38. Wyatt found 13% of 38 and allyson found 38% of 13. Explain why they both got the same answer. Would this work for other numbers as well? Why or why not?

    asked by Karen on December 8, 2015
  92. physics

    A 100 kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal. There is a coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a

    asked by Steven on May 14, 2010
  93. Physics

    A man stands on a platform that is rotating (without friction) with an angular speed of 1.21 rev/s; his arms are outstretched and he holds a brick in each hand The rotational inertia of the system consisting of the man, bricks, and platform about the

    asked by Aimee on November 18, 2011
  94. physical

    A proton resistor spring system in a magnetic field going out of the page has a mass of proton 1.67*10^-27 kg, a spring constant k=500 N/m and the resistor has r=5Ω. The magnetic field strength is 0.8T. a) When released from rest, calculate the maximum

    asked by Thomas on March 30, 2010
  95. Pre-Algebra

    Please help to solve to find x,y 1. y=7x-3 2. 4x+2y=8 Take the value of y in the first formula and substitute it for y in the second formula. Solve the second formula for x. Once x is found, solve for y in the second formula. Check by inserting both values

    asked by Lee on May 18, 2007
  96. math

    is these answers correct? solve the equation: 2x^2 +8x - 17=(x +2)^2= x=-7,3 solve (v-5)^2-63=0, where v is a real number, simplify answer as much as possible. v=3 square root 7+5,-3 square root7+5 v``12.93725, -2.937254 use the quadratic formula to solve

    asked by lee on October 31, 2010
  97. math

    As you follow your favorite NBA basketball team’s statistics, you notice the point guard is successfully shooting 85% from the free-throw line for this season. Assuming he is fouled near the end of a game and shoots with that same success rate, what is

    asked by emma on July 31, 2013
  98. Math, Please Help! I don't understand!

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