Albert

Popular questions and responses by Albert
  1. Physics

    A train accelerates from the rest at the station A at a rate of 0.8 m/s2 for 25 s, the travels at constant velocity for 77.5 s before it comes to rest at the station B after period of retardation lasting 20 s. What is the distance between stations A and B,

    asked on April 14, 2015
  2. Chemistry

    when 25.0 mL of a solution containing both Fe2+ and Fe3+ ions is titrated with 23.0 mL of 0.0200 M KMnO4 (in dilute sulfuric acid). As a result, all of the Fe2+ ions are oxidized to Fe3+ ions. Next, the solution is treated with Zn metal to convert all of

    asked on December 15, 2011
  3. Physics Help!

    A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

    asked on January 4, 2018
  4. Chemistry

    To what decimal place should each answer be rounded? and how many significant figures does the rounded answer have? a) 9cm + 2.8 cm= 11.8cm (unrounded) b) 0.135 atm + 0.6 atm= 0.735 atm (unrounded) PLEASE HELP

    asked on September 11, 2015
  5. math

    9. which set of output values correctly completes the function table? y=6-x input (X) output (y) -2 ? -1 ? 3 ? ----------------------- 4,5,3 -8,-7,3 8,7,3 11. What is the function rule shown by the table? input(x) output(y) -2 -3 0 1 1 3 2 5

    asked on June 13, 2018
  6. Implicit differentiation calculus

    PLEASE HELP , I DON'T UNDERSTAND find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you

    asked on June 21, 2012
  7. science

    find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the

    asked on January 21, 2016
  8. Chemistry Physics

    How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?

    asked on November 5, 2014
  9. maths

    A ship travels at a constant speed of 25 kilometers per hour (kph) in a straight line from port A located at position (xA, yA) = (−100,−100) to port B at (xB, yB) = (300, 100). (a) (i) Find the equation of the line of travel of the ship. (ii) Find the

    asked on May 9, 2011
  10. math

    which values can be substituted for x to make the inequality x - 4 >0 true? choose all that apply A. 0 B. 3 C. 4 D. 18 my answer is 0 and 4 please check my answer's

    asked on June 13, 2018
  11. Math

    When you solve the system shown by the elimination method, which statement is true? y + 3x = 10 −y − 3x = 10 A. You eliminate y; the sum of the coefficients of y is zero. Then, you can solve for x. B. There is no solution; x and y are eliminated and

    asked on January 5, 2016
  12. THEORY OF INTEREST

    Suppose that a money market fund pays a nominal rate of interest of 8.7 percent convertible monthly. What is the equivalent nominal rate convertible quarterly?

    asked on September 30, 2014
  13. Chemistry

    How do you distinguish between fluorene and acetanilide? Suggest methods other than melting point and chromatography.

    asked on March 28, 2013
  14. college physics

    what is the force applied in the direction of the wire at a point attached to the patient in a traction system if the mass applied ius equal to 5kg.?

    asked on February 14, 2012
  15. accounting

    What generally accepted Accounting Principle(s) dominate the issue of asset valuation?

    asked on October 18, 2011
  16. Chemistry

    The reaction NO2(g) + NO2(g) → N2O4(g) is second order with a rate constant of 0.044 /M·s at a particular temperature and pressure. If the initial concentration of NO2(g) is 0.100 M, what is the concentration of NO2 after 20 minutes?

    asked on February 27, 2018
  17. Physics

    A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

    asked on January 4, 2018
  18. Math

    k such that 3 is the remainder when f(x)=x to the 4 power minus 4xcube minus 8xsquare minus 7x plus 1. Tapos which of the following binomial factor of 2xcube plus 5xsquared minus 10x plus 16.

    asked on October 1, 2017
  19. stat

    Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99% confidence interval for the population mean

    asked on December 7, 2015
  20. Physics

    A block initially at rest, slides down from the top of an inclined plane 30degrees above the horizontal. The plane is 100feet long and frictionless. what distance will it travel on a frictionless horizontal surface at the foot of the plane 6seconds after

    asked on January 12, 2015
  21. Chemistry

    Please help me set up these problems. I have been staring at them for hours and I can't tell where I went wrong. Question: Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures.

    asked on November 16, 2014
  22. theory of interest

    1.Two investments are made at the same time. The first consists of investing 1550 dollars at a nominal rate of interest of 7.9 percent convertible semiannually. The second consists of investing 1450 dollars at a nominal rate of interest of 7.9 percent

    asked on October 25, 2014
  23. Economics

    What are welfare payment or consumer?

    asked on July 23, 2014
  24. English Analysis

    Reading The Stranger by the lovely Albert Camus. Just need help understanding this question: -After I listed some themes I explored, my teacher asks: "Given the themes you listed, are any conventions questioned based on the treatment of a given theme?

    asked on October 9, 2012
  25. maths

    Choose the option that gives the solution of the initial-value problem dy dx=(1 + 2 cos2x^2)/y (y > 0), y= 1 when x = 0. Options A y = 1+ 2sin^2 x B y = (1 + 2 sin x)^2 C y = (4x + cos(2x))^2 D y = 4x + cos^2 x E y =sqrt(4x + cos(2x) F y =sqrt(1 + 4x +

    asked on May 11, 2011
  26. Geometry

    The perimeter of a rectangle is 76 feet. If the width is doubled and the length is halved, the new rectangle will have a perimeter of 62 feet. Find the dimensions of the original rectangle. Define your variables.

    asked on March 8, 2010
  27. Maths

    In A Geometric Sequence The 3rd Term Is 24 And The 5th Term Is 3. Write Down The First Four Terms In The Sequence.

    asked on February 11, 2020
  28. Mathmeta

    How to select logical numbers for mark six?

    asked on June 10, 2019
  29. math

    if the interest rate is 8.25% and you borrowed $5000 for 30 days. How much interest would you pay

    asked on May 19, 2019
  30. Life orientation

    Critically discuss six ways in which individual,groups and broader of South African community can be influenced by humans rights violations

    asked on April 27, 2019
  31. Physics

    what is refractive index in apperent depth

    asked on August 25, 2017
  32. Physics

    g=4 pi (l/t square)

    asked on July 21, 2017
  33. math

    The ticket prices for a movie are shown in the illustration. Receipts for one showing were $1,930 for an audience of 205 people. How many general admission tickets and how many senior citizen tickets were sold?

    asked on May 22, 2017
  34. Chemistry

    What should the molar concentrations of benzoic acid and sodium benzoate be in a solution that is buffered at a pH of 4.75 and has a freezing point of -2.0 ∘C? (Assume complete dissociation of sodium benzoate and a density of 1.01 g/mL for the solution.)

    asked on March 29, 2017
  35. Specialist Mathematics

    Need help with three proofs. Proof#1: Prove that |x+y| is less than or equal to |x|+|y| Proof#2: Prove that |x|-|y| is less than or equal to |x-y| Proof#3: Prove that |x+y+z| is less than or equal to |x|+|y|+|z|.

    asked on December 22, 2016
  36. Physics

    Hello, I need some help with this physics problem. This was the only one I couldn't solve, and the teacher wouldn't help me because she wanted me to figure it out for myself, just like everyone else tried. (Although no one did) Here is the question: Type

    asked on November 1, 2016
  37. Math (calculus 3)

    A football is thrown down the field by a quarterback from a height of 1 foot with an initial velocity of 40 feet per second at angle of pi/6 radians. If a receiver catches the ball downfield at a height of 1 foot above ground; a) How long was the ball in

    asked on September 28, 2016
  38. Math

    A very large book has pages numbered from 1 to 11521. How many times is the digit 3 printed?

    asked on September 21, 2016
  39. Math

    A wheel makes6 1/12 revolution per minute. If it rotates 45 minutes,how many revolutions does it make

    asked on April 9, 2016
  40. trigonometry

    can someone help me prove the identities on this: 1- 1/2 sin2θ = sin^3θ + cos^3θ / sinθ + cosθ

    asked on January 21, 2016
  41. trigonometry

    sina^2θcos^2θ= 1/8 (1-cos4θ)

    asked on January 21, 2016
  42. Math

    Solve the system using substitution. 6x + y = 12 4x + 6y = −8 A. (2 1/2,3) B. (−2 1/2,−3) C. (2 1/2,−3) D. no solution I GOT B!

    asked on January 5, 2016
  43. Math

    Solve the system using substitution. x = y − 6 y = 6 − 3x A. (0, 6) B. (6, 0) C. (0, −6) D. (−6, 0)

    asked on January 5, 2016
  44. Math

    Solve the system using substitution. y = 4x − 5 y = 2x + 1 A. (−2, −3) B. (1, 3) C. (−2, −13) D. (3, 7)

    asked on January 5, 2016
  45. trigonometry

    from a point 3 m above the water surface, the angle of elevation of the top of a certain tree is 30°40', while the angle of depression of its image is 65°10'. Find the height of the tree and its distance from the point of observation.

    asked on December 7, 2015
  46. Finance

    Evans Technology has the following capital structure. Debt ............................................ 40% Common equity .......................... 60 The aftertax cost of debt is 6 percent, and the cost of common equity (in the form of retained earnings)

    asked on November 16, 2015
  47. math

    convert 40.0m^3 to liters. note that 1mL = 1cm^3. can you show me how to do this problem?

    asked on September 10, 2015
  48. Chem

    To what decimal place should each answer be rounded? and how many significant figures does the rounded answer have? a) 9cm + 2.8 cm= 11.8cm (unrounded) b) 0.135 atm + 0.6 atm= 0.735 atm (unrounded) can you show me how to do this?

    asked on September 10, 2015
  49. Algebra

    The number of items on two grocery list differs by seven.the total number of items is 33 how many items on each list

    asked on August 13, 2015
  50. math

    a metal cutter was accurate to the nearest micron.about how many pieces of metal 0.8188 centimeters long could the metal cutter cut from a 32.253 length of metal?

    asked on February 5, 2015
  51. physics

    A ball of mass M1 moves with a velocity U1, collides perfectly elastically with a stationary ball of mass M2 . After the collision, M1 and M2 move with velocities V1 and V2 respectively. Show that : V1 =(M1-M2) / (M1 + M2 ) * U1 .

    asked on January 29, 2015
  52. english(4th grade)

    Identify the infinitive and classify whether it is used as a subject, direct object, predicate noun, appositive, and object preposition. 1.Her only thought was to win. 2.My desire is to help. 3.Mrs. Cao loves to crochet. 4.They remember to say the rosary

    asked on December 27, 2014
  53. english (4th grade )

    Identify the infinitive and classify whether it is used as a subject, direct object, predicate noun, appositive, and object preposition. 1.Her only thought was to win. 2.My desire is to help. 3.Mrs. Cao loves to crochet. 4.They remember to say the rosary

    asked on December 26, 2014
  54. Chemistry

    I'm doing a redox potential/lead acid cell experiment and one of the questions that were asked was: -What were the identities of the gases you saw being produced at the + and - electrodes during the cell conditioning process? We used H2SO4 How do I go

    asked on December 3, 2014
  55. physics

    Phisic

    asked on November 6, 2014
  56. TRIG WORD PROBLEMS

    from 25 feet away from the base of a building, the angle of elevation from the ground to the top of a building is measured 38 degrees. how tall is the building. WHat i did was put 25 feet on the base of the triangle the angle measurement oppsite and the

    asked on November 4, 2014
  57. RIGHT TRIANGLE TRIG

    a kite is being flown 150 yards of string. the kite has an angle of elevation with the ground 65 degrees. how high above the ground is the kite. I DON'T KNOW HOW TO SET UP THE PROBLEM

    asked on November 4, 2014
  58. physics

    a turntable rotates about a fixed axis, making one revolution in 10s . the moment of inertia of the turntable about it's axis is 1200kg/m^2 . a man of mass 80kg , initially standing at the center of the turntable, runs out along a radius. what is the

    asked on October 17, 2014
  59. social studies

    From the point of an environmentalist, which is probably the most significant argument against offshore drilling for oil?

    asked on June 10, 2014
  60. English art

    Please, critique this critique: Very dramatic interactions in a world novel to me, with canine preening for competitive exhibition, following the emotions of the lead characters is exciting. This is no "Dog story", and Lassie wouldn't be noticed in the

    asked on February 9, 2014
  61. English

    What is parallelism, please?

    asked on February 9, 2014
  62. algebra

    A man and a woman's ages total 98. He is twice as old as she was when he was her age now. What are their ages?

    asked on February 7, 2014
  63. History

    How Mali Build 0n Ghana Empire

    asked on November 7, 2013
  64. Math

    3/4x^2 x 2x^2y x 23xy^3

    asked on November 7, 2013
  65. Polynomials

    Can someone please help me get the sum difference and product of this problem I am so lost x^3+ 2x-5∶ x^4-x^3+ 3x^2- 2x+3

    asked on September 19, 2013
  66. finance

    Suppose you pay $1000 into a savings account that pays 2% per year, compounded annually. How many years will would it take for the money in the account to double, to $2000? use "successive approximation."

    asked on September 17, 2013
  67. physics

    Suppose the straight-line distance between New York and San Francisco is 4.4 106 m (neglecting the curvature of the earth). A UFO is flying between these two cities at a speed of 0.69c relative to the earth. What do the voyagers aboard the UFO measure for

    asked on July 8, 2013
  68. Chemistry

    How do you differentiate between fluorene and acetanilide? Suggest procedures and steps involved other than melting point and chromatography.

    asked on April 1, 2013
  69. math

    During an art contest at your school, you and a classmate each won blue ribbons for 1/3 of the pieces you entered in the contest. You won 2 blue ribbons and your classmate won 3 blue ribbons. Explain how this could be.

    asked on January 29, 2013
  70. ACT Math

    Carlos goes to a local deli for lunch and orders a sandwich. He needs to choose a bread, a meat, a vegetable, a cheese and a source. How many sandwich combinations are possible? Assume Carlos always pick only one item from each category. Bread: Italian,

    asked on November 13, 2012
  71. Algebra

    Please let me know if I answered these correctly. thank you, #2. Add: 3p^2 – 5p – 4 and 9p^2 + 10p – 2 A. 12p2 + 15p – 6 B. 12p2 + 5p – 2 C. 12p2 + 5p – 6 D. 12p2 + 15p – 2 answer D ________________________ #7. (3x^2 – 2x – 1)(x^2 + x +

    asked on August 11, 2012
  72. Calculus grade 12

    find the slope of the tangent line to y^4 = 3x^2 - 2x at the point (1,1)

    asked on June 21, 2012
  73. Calculus grade 12

    find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you

    asked on June 21, 2012
  74. Calculus grade 12

    hi i need help differentiating these.. 1. y = cos(3x^2 + 2x) 2. y = ln(3x^2 + 5) thank you

    asked on June 21, 2012
  75. math

    $24 lft a 15 percent tip how much total

    asked on May 14, 2012
  76. chemistry

    Can someone pleeeeeaaase explain Charle's law in a simple way.

    asked on May 14, 2012
  77. college physics

    calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

    asked on February 14, 2012
  78. college physics

    calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

    asked on February 14, 2012
  79. College Algebra

    A rectangle field with area of 1,500,000 needs to be fenced. 2W+2L=5,000. solve for L and W

    asked on December 15, 2011
  80. trig

    1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x

    asked on February 25, 2012
  81. Chemistry

    calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.

    asked on October 31, 2011
  82. math

    Estimate products of fractions. 2/9x26

    asked on September 20, 2011
  83. maths

    f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

    asked on May 17, 2011
  84. maths

    The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

    asked on May 17, 2011
  85. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

    asked on May 17, 2011
  86. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

    asked on May 17, 2011
  87. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

    asked on May 16, 2011
  88. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

    asked on May 16, 2011
  89. maths

    The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

    asked on May 16, 2011
  90. maths

    f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

    asked on May 16, 2011
  91. maths

    f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative.

    asked on May 15, 2011
  92. maths

    The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

    asked on May 15, 2011
  93. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

    asked on May 15, 2011
  94. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

    asked on May 15, 2011
  95. maths

    f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

    asked on May 14, 2011
  96. maths

    The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

    asked on May 14, 2011
  97. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

    asked on May 14, 2011
  98. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

    asked on May 14, 2011
  99. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

    asked on May 14, 2011
  100. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

    asked on May 14, 2011

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