1. chemistry

    For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation. pH values: NaCl 6.89 NaC2H3O2 7.75 Na2CO3 11.20 Cu(NO3)3 4.73 NH4Cl 5.91

    asked by mary on January 31, 2012
  2. science

    Calculate the pH of a solution of ammonium acetate (CH3COONH4) 0,85M knowing that for NH3 Kb = 1,79x10-5 and CH3COOH Ka = 1,76x10-5 and commented on the result obtained. Then calculate the percentage of acetic acid product at equilibrium

    asked by frankscience on May 1, 2016
  3. science

    A solution of 0.200M NaOH (14.0 mL) is mixed with 42.4 mL of 0.170M HNO3. Assuming the final volume is the sum of the initial volumes, what is the molarity of Na+ cation and NO3- anion? I do not know where to start to solved for the molarity of the ions.

    asked by Jessica on February 7, 2015
  4. Chemistry

    A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine whether or not each of the following additions would exceed the capacity of the buffer to neutralize it. a. 250 mg NaOH b. 350 mg KOH c. 1.25 g HBr d. 1.35 g HI Can you explain to

    asked by Johannie on October 31, 2010
  5. Chemistry

    A solution of 0.200M NaOH (14.0 mL) is mixed with 42.4 mL of 0.170M HNO3. Assuming the final volume is the sum of the initial volumes, what is the molarity of Na+ cation and NO3- anion? I do not know where to start to solved for the molarity of the ions.

    asked by Jessica on February 7, 2015
  6. Chemistry

    I just wanted to clarify that although Cody did respond to my question, we were still unable to determine the solution. I will post a link to the question in a minute. (i noticed you replied to the other posts a bit ago, but i hope im not being too abrupt.

    asked by Matt on November 20, 2011
  7. science

    four flasks each contain 100 milliliters of aqueous solutions equal concentrations at 25 degress C and 1 atm. the four flasks are KCL,CH3OH, Ba(OH)2, and CH3COOH. the question is Which solution had the lowest freezing point and explain answer

    asked by lisa on May 4, 2008
  8. Acid/Base Chemistry

    A 497 mL sample of 0.9960 M HI is mixed with 443 mL sample of KOH (which has a pH of 13.51). What is the pH of the resulting solution? What are the steps to solving this problem? I think you need to find the concentration of OH by taking 10^-pOH, and then

    asked by Jenna on December 8, 2013
  9. CHEMISTRY

    Chromium plating is done using a dichromate solution. How long would it take to plate 1.0x10-2mm thick onto a car bumper with surface area 0.25m^2 in a 25.0 Amp electrolytic cell? (density of chromium is 7.19g/cm^3)

    asked by PreMed33 on May 30, 2013
  10. Calculus check my answers

    1. The general solution of the differential equation dy - 0.2x dx = 0 is a family of curves. These curves are all: a. lines b. hyperbolas c. parabolas (my answer) d. ellipses 2. The table below gives selected values for the function f(x). Use a trapezoidal

    asked by Mike on July 2, 2018
  11. Chemistry: molality and freezing point?

    What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23.3C? Assume the density for water is exactly 1g/mL. m = moles solute / kg solvent Help

    asked by Agatha on January 27, 2009
  12. chemistry

    A solution prepared by adding 0.17 g of a polymer to 0.6 L of toluene (methylbenzene, a common solvent) showed an osmotic pressure of 0.808 Torr at 21â—¦C. What is the molar mass of the polymer? Answer in units of g/mol.

    asked by Anonymous on November 27, 2017
  13. Chemistry

    You are given a solution of HCOOH (formic acid) with an approximate concentration of 0.20 M and you will titrate with a 0.1105 M NaOH. If you add 20.00 mL of HCCOOH to the beaker before titrating, approximately what volume of NaOH will be required to reach

    asked by Amber on November 11, 2015
  14. chemistry

    What is the boiling point of the solution in which you are going to cook spaghetti if it contains 51.0 g of NaCl dissolved in 1.30 L of water? Assume the density of water is 1.00 g/mL. Use molar masses with at least as many significant figures as the data

    asked by jim on December 13, 2010
  15. english

    pls help in my research paper, i want to get your recommendations and comment as well as solution.. the title of my research is "causes why students are refraining from absences". now my problem is what is happen to the worldwide, national and local

    asked by vanie on November 18, 2008
  16. Chemistry

    excess magnesium is reacted with 45 grams of sulfuric acid. 9.5 liters of hydrogen gas are collected understand conditions of temperature and pressure. what is the percentage of hydrogen sulfate and of water in the acod solution?

    asked by Anonymous on March 28, 2014
  17. Science

    What are the differences between these things? 1. substance vs. mixture 2. homogeneous vs. heterogeneous 3. solute vs. solvent 4. saturated vs. supersaturated 5. concentrated vs. dilute 6. element vs. compound 7. aqueous solution vs. universal solvent 8.

    asked by Kaity on November 20, 2008
  18. chemistry

    the fictitious compound pandemonium carbonate has a ksg=3.091*10^-9 M 3 in water at poor temperature .calculate the solubility of PnCo3 in an aqueous solution of 1.11 M pandemonium sulfate. express your answer in units of molarity.

    asked by himani. on May 5, 2013
  19. Chemistry

    I've been stuck on this question for awhile now. I'm having a lot of trouble figuring out how to start it. If you had added exactly 20.00 mL do d.i. water before the titration, calculate the molar concentration of OAc- would have been at the end of the

    asked by Rich on March 4, 2016
  20. Chemistry

    Determine the volume of 0.250 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is: H2SO4(aq) + 2KOH(aq) = K2SO49aq) + 2H2O(l) Find: 205 mL of 0.130 M H2SO4

    asked by Kelsey G on November 30, 2010
  21. Chemistry

    Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000? i made a ka for both of them to find out HA and i got .025M for fhte first one and 1E-6M for the second one

    asked by Carry on February 26, 2009
  22. Chemistry

    Reviewing for final (this should be basic but...I am stuck): Describe how you would prepare 500.0 grams of a solution of sucrose, C12H22O11, in water which the mole fraction of sucrose is 0.125. I feel like somehow this is a molality question too :( Thank

    asked by MiaowDescribe how you would prepare 1.00 on May 19, 2012
  23. chemistry

    A dilute solution of sulfiric acid is added to 15g of copper and iron mixture. a) the volume of h2 envolved at standard conditions is 4.48L what is the mass of each of the metals constituting the mixture ? Vm=24l.mol.

    asked by alaa on October 18, 2014
  24. Math

    A thin plastic band 50 cm long is used to tie seven plastic pipes together. What is the radius of the pipe? The shape is a hexagon but not vertices but curved. My solution was , you get an eqilateral triangle with side 3 r 3 r = 50/6 r = 50/6/3 = 2.73 But

    asked by Manav on November 26, 2015
  25. Analytical Chemistry

    Given a 300 ml solution containing 0.2M H2L+ calculate the pH after the addition of 130.00 ml of 0.6M KOH. -----pH = 9.377 What total volume of KOH must be added to reach pH of 10.00 ---0.386 moles However, I am getting an amount of ml that is way too

    asked by Jcc on March 12, 2015
  26. chemistry

    10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in grams of Pbl2 produced, and find the number of moles of the excess reagent. PLZ explain

    asked by Lisa on December 13, 2010
  27. bio

    why does 10 % Sodium Chloride Solution affect and kill Sarcina lutea but not Serratia marcescens Escherchia coli Bacillus subtilus Bacillus cerus? I am trying to find some evidence of why but can't. It is true though because I tested it in a lab.

    asked by rebekah on January 29, 2012
  28. Chemistry

    A calorimeter contains 30.0 mL of water at 15.0 C. When 1.50 g of X (a substance with a molar mas of 46.0g/ mol is added, it dissolves via the reaction X (s) + H2O (l) ----> X (aq) and the temperature of the solution increases to 26.5 C. Calculate the

    asked by Student on March 11, 2016
  29. chemistry

    briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.

    asked by Anonymous on March 23, 2011
  30. Teachers Aide/Early Childhood Education and After-

    8. When resolving conflicts between students in an after-school program, the teacher aide should A. give attention to the aggressor first. B. let children discuss their differences with each other. C. never use a “time-out” corner. D. separate and

    asked by AspiringTeacherandMotherofFour on September 28, 2010
  31. English

    I forgot to include a few more sentences I would like you to check, too. 1) Pamela is embarassed at his giving her presents though she thinks there is no harm in what he said to her. She is going to put aside (?) vanity. Being a virtuous girl, she is not

    asked by Franco on May 2, 2010
  32. Ece

    Which of the following is not suggested to help a preschooler to separate from their family with less difficulty? A. Meet with a child a few hours before school begins. B. Use transition materials. C. Encourage families to visit. D. Show foster acceptance

    asked by Jay on October 6, 2015
  33. visual basic

    Doing a units of measurement program don't know what the formula i need to use to convert the units? Also was wondering how do i get the answer to show at least 3 decimals places im getting to many numbers for my results? Should i declare them as a double

    asked by cl on May 8, 2009
  34. S.S. Venezuela (check answers)

    When oil prices fell in the mid-1980s, Venezuela's economy 1. suffered a decline 2. enjoyed an increase 3. stayed about the same*** 4. began to show signs of recovery Most of Venezuela's population lives 1. in cities*** 2. in the countryside 3. on islands

    asked by Caleidoscope on May 21, 2015
  35. english II

    Error in Sentence Consistency and Parallelism. the answer is d. A.First prepare a résumé; then write your cover letter. B.An autocratic leader makes all decisions and then tells subordinates what to do and how to do it. C.If you have an eye for detail

    asked by Shaquitta on November 24, 2009
  36. Is Tallahassee the midpoint of Pensacola and St. A

    Tallahassee was established as the capitol of Florida because it was between Pensacola and St. Augustine. The distance from Pensacola to Tallahassee can be represented as (3x + 40) miles. The distance from Tallahassee to St. Augustine can be represented as

    asked by Anonymous on August 7, 2007
  37. Physics

    This is how the problem starts out: A meter stick is placed with the fulcrum at the 50-cm mark. If a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system? I thought that since

    asked by Emily on December 6, 2007
  38. Physics

    a copper container of mass 80g contains 60g of a liquid at 20 degree Celsius. a piece of copper of mass 100g and temperature 100 degree Celsius is dropped into the liquid. if the final temp of the system is 59.7 degree Celsius then the specific heat

    asked by Hanan help her on August 28, 2012
  39. Language Arts

    1. The word aloof is an English word borrowed from Dutch. Its meaning is "at a distance." In which of the following sentences is the word used correctly? Anne's sociable nature mad her aloof in new situations When he first arrived at the Secret Annex,

    asked by Hailee on April 17, 2015
  40. Neuroscience

    I'm struggling with the following question: The opening of chloride selective channels by a neurotransmitter X will drive membrane potential toward the chloride equilibrium potential. Assume that early during cell development, Cl is pumped into the cell

    asked by John on September 13, 2015
  41. SAT Math

    If x and y are positive integers, which of the following could be equal to 3x+ 4y? The answer is 10, but not sure on how to get the answer? Also, is there a short cut to get to the answer without taking a lot of time on the SAT to work this type of problem

    asked by Student on March 7, 2015
  42. physics

    A wire 28 cm long is parallel to a 0.36 T uniform magnetic field. The current through the wire is 4.5 A. What force acts on the wire? What equation do you use? I tried F= ILBsin(90) and that didn't work!

    asked by Physics on March 23, 2010
  43. English- Subject/Verb Agreement

    ______ 1. the group ARE/IS meeting to discuss which poem to use. ______ 2. DOES/DO these games sound like fun? ______ 3. WERE/WAS you and Kyle planning to work on the school magazine? 1. is 2. do 3. were

    asked by Trojan on May 30, 2018
  44. math

    how much work does it take to pump water from a full upright tank circular cylindrical tank with radius 5m and a height of 10m to a level of 4m above the top of the tank

    asked by Antony on August 19, 2016
  45. science

    The driver of an 800.0 kg car decides to double the speed from 25.0 m/s to 50.0 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?

    asked by veeda on June 29, 2013
  46. MATH

    Jenny agreed to work for a year for $9000 plus a motorcycle. At the end of 5 months, she left the job and received $250 plus the motorcycle for her pay. What was the value of the motorcycle?

    asked by HELP NOW PLEASE on March 28, 2017
  47. Math

    Marie traveled to work (7km) in 25 minutes. What was her speed? I got 16.8km/h but my teacher said it's 28km/h and I have no idea how he got that. Also, how do you calculate average speed when there's more than one speed? (this is just for the next

    asked by Emily on June 13, 2016
  48. Physics

    Push a loaded grocery cart by a distance of 50m exerting horizontal force of 30N on the cart at an angle of 53degrees, how much work would you do on the cart?

    asked by Lisa on October 23, 2012
  49. math

    The garage you work for as an auto mechanic measures 230 ft. by 150 ft and handles 69 cars. Using the existing garage as a model, how much space would you plan to have in your garage?

    asked by justin on April 19, 2014
  50. physics

    A tugboat pulls a ship with a constant net horizontal force of 5200 N and causes the ship to move through a harbor. How much work is done on the ship if it moves a distance of 3 km?

    asked by Devon on December 9, 2010
  51. Re: Finance

    Thanks, Economyst. What formula did you use to calculate 17.53117? I found a formula that I thought would work to get that sum, but I got a different number. The formula is: 1 - 1.1^(-10)/ 0.1 and also: (40000* 163)/17.53 = $371933 is the answer?

    asked by John on September 29, 2008
  52. science

    a crane does 62,500. J of work lifting a 120.-N backpack? a. How high did you lift the backpack? b. How much did the backpack weigh in pounds? (Hint: There are 4.448 N in one pound.)

    asked by Anonymous on May 4, 2011
  53. math

    how would I check this on my own? I know you put numbers in the place of the letters but when I do that I come up with my moms answer. this is what i have when I check my work. p=-2 q=3 6*(-2)*3 =-36 but 3(-2)(-2*3)=36 could you tell me what i'm doing

    asked by TiffanyJ on October 22, 2010
  54. Statistics

    Jane Blaylock joined the Ladies Professional Golf Association (LPGA) in 1969 and by 1972 had become the leading money winner on the tour. During the Bluegrass Invitational Tournament, she was disqualified for an alleged rules infraction. The LPGA appointed

    asked by Manny on November 21, 2018
  55. computer ( Ms.Sue help )

    To reveal paragraph markers, such as spaces, hard returns, and tabs in your document, you should  A. click the General tab. B. click the Page Layout tab. C. right-click anywhere in the task bar and click the ¶ symbol. D. click

    asked by Brooklyn on April 5, 2016
  56. physics

    This question refers to my question that was replied to: Sue and Jenny kick a soccer ball at exactly the same time.Sue's foot exerts a force of 62.3 N to the north. Jenny's foot exerts a force of 115.9 N to the east. What is the magnitude of the resultant

    asked by alexa on July 2, 2011
  57. AP Chemistry

    So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then 1 ml of NaOH solution.

    asked by Ellan on October 1, 2009
  58. computer science

    Write a program that will input an item’s wholesale cost and its markup percentage. The program will output the item’s retail price. The program should repeat for several input values. For example, if an item cost is 5.00 and markup is 100%, then the

    asked by Matt on March 30, 2010
  59. Chemistry

    When 0.643 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 105C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Jared on May 7, 2007
  60. physics

    A body is projected so that on its upward path it passes through a point x meters and y meters vertically from the point of projection. Show that if R is the range on the horizontal through point of projection the angle of elevation is

    asked by Vasco on May 5, 2012
  61. algebra 2

    On a second report that you reviewed, the team simplified the expression to 4. Show how to simplify the rational expression correctly. Explain your steps so that the team understands how to simplify an expression similar to this in future experiments.

    asked by hannah on October 23, 2013
  62. Math

    Rectangle ABCD has been subdivided into 4 regions. The areas of two of these regions are a^2 and 144. The combined area of the other two regions is 25a. What is the perimeter of the rectangle ABCD? Please help and show steps! I don't have a clue how to do

    asked by Cherie on October 3, 2014
  63. math

    Find the stationary point on the curve y=x^2-1 and show that it is a minimum point by checking the derivative on both sides of it. I've found that its stationary point is (0, -1), just don't understand what "check the derivatives of both sides of it"

    asked by Anon on July 4, 2019
  64. Solid Mensuration

    one diagonal of a cyclic quadrilateral coincides with a diameter of a circle whose area is 36pi cm^2. If the other diagonal which measures 8cm meets the first diagonal at right angles, find the area of quadrilateral. Show your solutions

    asked by Joy on April 30, 2016
  65. Algebra

    Consider the function :[1,∞)→Rgivenbytheformulay=x3+2. (a) Show that though the function is increasing at an increasing rate, the change in x required to double the value of the function is not constant. (b) Make a table of values for constant changes

    asked by Jasmine on April 2, 2014
  66. math

    use a flow map to help you figure out the missing number. be sure to use arrows to show the direction of your map, and make sure you have a title. clue 1 i am a multiple of 3 clue 2 i am between the numbers 15 and 36 clue 3 when you add my two numbers

    asked by keith on August 18, 2010
  67. Solid Mensuration

    one diagonal of a cyclic quadrilateral coincides with a diameter of a circle whose area is 36pi cm^2. If the other diagonal which measures 8cm meets the first diagonal at right angles, find the area of quadrilateral. Show your solutions

    asked by Anonymous on April 30, 2016
  68. math

    application of the laws of exponent show different ways of simplifying each of the following expression. answer the question that follow. 1. 2^5 * 2^4 2. x^4 * x^7 3. (3^2)^3 4. (m^4)^5 5. (5^3 * 2^2)^2 6. (a^4 * b^2)^5 7. (3x^5)^3 8. 7^4/7^2 9. x^5/x^8

    asked by diana on September 8, 2011
  69. maths

    The common ratio r of a geometric sequence satisfies the quadratic equation 2r squared - 3r -2 = 0. If the sum to infinity of the same sequence is 6, explain why, in this case, r can only take on one value, and hence state the common ratio, r. Also, show

    asked by jen on October 19, 2007
  70. Math

    $100 is deposited in a savings account that pays 4% interest compounded annually. A) how much is in the account after 5 years? B) use logarithms to determine how many years it will take for the account to grow to $1000. Could someone show me how to do this

    asked by Shannon on August 23, 2010
  71. math

    A scale drawing of your classroom is 4 inches by 6 inches. If one inch represents 8 feet, what is the actual size of your classroom? I think I know the answer, jst having trouble figuring out how to write it down & show it. I think it's 32 feet by 48 feet.

    asked by Zion on December 8, 2014
  72. Chemistry

    Another fill in the blank Show the chemical reaction equation for the process known as photosynthesis by filling in the blanks below ________+______+________ ---> _____+________ search for photosynthesis reaction on Google.

    asked by Steve on May 16, 2007
  73. 5th grade

    use a flow map to help you figure out the missing number. be sure to use arrows to show the direction of your map, and make sure you have a title. clue 1 i am a multiple of 3 clue 2 i am between the numbers 15 and 36 clue 3 when you add my two numbers

    asked by keith on August 18, 2010
  74. Math

    A flooring company charges a homeowner a fixed labor charge of $V1 plus V2 per square foot of flooring.  If the total bill was T, what is the equation to show how many square feet of flooring the homeowner required?

    asked by Tina on July 27, 2017
  75. PHYSICS HELP

    A fibre is fixed at one end it is stretched over a pulley (2.0kg) is the mass. if the mass per unit length of the fibre is 82g/m, calculate the velocity of the wave on the stretched fibre. (please show working)

    asked by Lyoto Machida on June 15, 2012
  76. Physics

    The density of the Earth, at any distance r from its center, is approximately (14.2-11.6(r/R)*10^3) Kg/m^3, where R is the radius of the Earth. Show that this density leads to a moment of inertia I = 0.330MR2 about an axis through the center, where M is

    asked by Avery on November 18, 2012
  77. calculus

    If u = log(r), where r^2 = (x-a)^2 + (y-b)^2, and (x-1) and (y-b) are not zero simultaneously, show that d^2u/dx^2 + d^2u/dy^2 = 0. I first used some of the properties of log and made u = 1/2 * log((x-a)^2 + (y-b)^2) Then made u = 1/2 * ln((x-a)^2 +

    asked by Bryant on March 4, 2012
  78. Physics

    The 10 kg mass is released from rest at a height of 1m above the floor. If the co-efficient of kinetic friction between the 5 kg mass and the table is 0.28, what will be the speed of the 10 kg mass just before it hits the floor? Please show the equation

    asked by Anonymous on October 24, 2016
  79. Physics

    A liftascends with constant acceleration a, then with constant velocity and finally stops under a constant retardation a. If the total distance ascended is s, and the total time occupied is t,show that the time during which the lift is ascending is given

    asked by Amah on January 5, 2016
  80. history

    the absence of effective action by congress on the question of domestic debt left the matter to be dealt with by the state governments. their solution was to a. do nothing b. raise taxes on property owners c. reduce tax rates in order to stimulate the

    asked by kyle on September 14, 2008
  81. Organic Chemistry

    The separation of a mixture of benzoic acid and benzoin in dichloromethane into its pure compounds by a combination of solvent extraction , distillation and recrystallization. Why is carbon dioxide evolved when the organic solution is shaken with sodium

    asked by Davia on November 17, 2010
  82. Physics (Classical Mechanics)

    Hey.. I don't know exactly how to get the solution for this one... doubleudoubleudouble dot physikerboard.de/files/fahrzeug_223.jpg (its a sketch i made with paint^^) We assume there are no frictions at all and we only look at the masses M, m1 and m2. I

    asked by Toby on November 18, 2010
  83. Science

    Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the solution increases. Which of these best explains why this is considered to be a chemical change? No energy was destroyed. Heat was

    asked by Anonymous on August 2, 2011
  84. Chemistry

    Write an equation (chemical or ionic) and use oxidation numbers to find out what is being oxidized and what is being reduced. (a) aluminum + oxygen (b) magnesium + steam (c) iron + dilute hydrochloric (d) copper(ii) oxide + carbon (e) bromine + potassium

    asked by Click6 on June 30, 2011
  85. physics

    Two blocks, each of mass m, are attached to the ends of a massless rod which pivots as shown in Figure 8-40. Initially the rod is held in the horizontal position and then released. Calculate the magnitude and direction of the net torque on this system.

    asked by jenn on November 10, 2009
  86. Algebra

    You want to determine the average number of songs people keep on their MP3 players. You want to collect data from a random sample of at least 300. Which of these would be the most valid method of collecting data? a. Survey students coming in and out of

    asked by SkatingDJ on June 7, 2015
  87. Physics

    A 24.5N brick slides from rest down an 11.2m, 53.0 degree ramp with a meu=0.45. At the bottom, it strikes a stationary 36.8N brick, and then the two slide on together. How far will the two slide on a level surface with a coefficient of friction of 0.080?

    asked by Lisa on June 14, 2007
  88. chemistry

    1) Explain why propan-1-ol has the number "1" in the name. -The number is there to show where the OH must go. 2) Say why ethanol does not have a number in its name. -Something to do with the amount of carbons ?? Butan-1-ol has several isomers. Give the

    asked by Anonymous on April 3, 2008
  89. Calculus

    Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x intercepts b) find the first derivative c) find any critical values d) find any local(relative) extrema e) find second derivative f) discuss the concavity g) find any inflection points Please show

    asked by Gabby on April 28, 2013
  90. Physics

    A ceiling fan starting from rest reaches an angular velocity of 30 rev/sec in 5 sec. What is the angular displacement of the fan during these 5 sec? Can you show me the steps need to figure this question out? Thanks!

    asked by Mike on April 24, 2013
  91. physics

    Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is proportional to M/d.

    asked by Greg on May 28, 2008
  92. Calculus

    Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x intercepts b) find the first derivative c) find any critical values d) find any local(relative) extrema e) find second derivative f) discuss the concavity g) find any inflection points Please show

    asked by Gabby on April 28, 2013
  93. Math

    Suppose Elina used 15 tiles to make the rectangular design. How many different rectangles could she make with the 15 tiles? Write a list or draw a picture to show the number and dimensions of the rectangles she can make.

    asked by Maria on January 23, 2018
  94. probability

    John hs 3 red markers and 5 blue markers. What is the probability that he picks a red marker, and then, without replacing it, selects another red marker? Please show me how to set this up (you don't have to give me the answer)...thank you

    asked by John on August 10, 2016
  95. Chemistry

    Show the steps necessary to transform acid on left to compound on right... Make sure you use SOCl3.................. (CH3)3CCH2C(=O)OH ----------> (CH3)3CCH2C(=O)OCH2CH=CH2 (CH3)3CCH2C(=O)OH-----------> (CH3)3CHC(=O)N(CH2CH3)2

    asked by Arthur on November 1, 2012
  96. physics

    A bicyclist wants to make it from one building to the next. The first building he is standing on is 20 m tall. The building he wants to reach is 12 m tall. He is moving at 4 m/s and the gap between both buildings is 5 m. Will he make it? Please just show

    asked by help please!!! on March 23, 2014
  97. Physics

    Sound of a certain wavelength is coming from within a room and passing through a rectangular door (a "slit"). If the width of the doorway is twice the wavelength of the sound, what is the diffraction angle è of the sound leaving the doorway? Please show

    asked by Tiffany on February 17, 2015
  98. Algebra

    How can you model data with a linear function? You must provide a real-world example and show how to model the problem using a linear function. Be sure to explain how you know it is a function. This is a discussion question I need help on, can somebody

    asked by Fading on September 29, 2016
  99. maths...

    This is the entire question: A curve has the equation y=(x+2)√(x-1). i)Show that dy/dx = kx/√(x-1) and find k ii)Hence, evaluate limit 2 to 5 ∫ kx/√(x-1)dx My answer: first part, i have already shown, and k is equals to 3/2 I don't get the second

    asked by Aoi on June 19, 2009
  100. Calculus

    The particular solution of the differential equation dy/dt=y/4 for which y(0) = 20 is y = 20e^-0.25t y = 19 + e^0.25t y = 20 e^0.25t y = 20^e4t

    asked by John on February 16, 2016

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