Popular questions and responses by jan
  1. Physics

    You encounter a moving walkway that is 97 m long and has a speed of 2.0 m/s relative to the ground. How long would it take you to cover the 97 m length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the

    asked on February 4, 2012
  2. basic statistics for the behavioral sciences

    (a)on a normal distribution of exam scored, poindexter scored at the 10th percentile, so he claims that he outperformed 90% of his class. Why is he correct or incorrect? Because Foofy's score is in a tail of the distribution, she claims she had one of the

    asked on September 9, 2011
  3. Physics

    A hot-air balloon rises from the ground with a velocity of (2.00 m/s)y. A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (6.00 m/s)x relative to the balloon. When opened, the bottle is 7.00 m above the

    asked on February 4, 2012
  4. math

    my son is x year old ,in five years time i will be twice his age and both our ages will be multiples of 10.the sum of ages will be between 50 and 100.how old am i

    asked on March 2, 2016
  5. calculus

    Express as a single logarithm ln(a)+1/2ln(b) 2ln4-ln2

    asked on May 1, 2011
  6. Business Statistics

    The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people reveals the mean yearly consumption to be 60 gallons with a standard deviation of 20 gallons. a. What is the value of the population mean? What is the best

    asked on July 28, 2013
  7. geometry

    using inductive reasoning finish the pattern and explain george,thomas,abe,alexander

    asked on September 16, 2010
  8. Grammar

    'The genitourinary exam was unremarkable, with a circumcised !@#$%^&.' Verbs: 'was' and 'with'?

    asked on May 15, 2016
  9. Medical Transcription Editing

    'The patient had anorexia though he denied any nausea or vomiting' .. I marked the verb in this sentence as 'denied' but it was marked 'incorrect' .. please help!!

    asked on May 15, 2016
  10. Medical Transcription Editing

    'He suffered an injury to his knee and this is causing him pain and discomfort'. What are the verbs in this sentence PLEASE? I think they are 'suffered' and 'causing' but I was marked 'incorrect' .. I'm at a loss!

    asked on May 15, 2016
  11. Math

    Which expression is equivalent to -5(n-9) ?

    asked on March 21, 2011
  12. Pre-Calculus

    Solve the equation on the interval [0,2pi). 2sin^2x-3sinx+1=0 (2sinx+1)(sinx+1) I don't think I did the factoring correctly. When I multiply it out to double check I get 2sin^2x+3sinx+1

    asked on October 27, 2017
  13. Math

    Ben has 3 times as many guppies as goldfish. If he has a total of 20 fish,how many guppies does he have

    asked on September 6, 2016
  14. Chemistry

    A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of the .500 M HCl at 25 C is assed to 50 mL of .500 M NaOH at 25 C in a coffee cup calorimeter, the temperature of the mixture rises to 28.2 C. What is the heat of

    asked on November 16, 2012
  15. Physics

    What happens to the total circuit resistance when more devices are added to a series circuit?

    asked on May 19, 2012
  16. Science

    What is the difference between granite and gabbro?

    asked on November 12, 2010
  17. physics

    A uniform electric field of magnitude 333 N/C is directed along the +y-axis. A 6.00 µC charge moves from the origin to the point (x, y) = (-10 cm, -37 cm). A). What is the change in the potential energy associated with this charge? B).Through what

    asked on February 8, 2010
  18. chemistry

    Which of the following correctly relates the two equilibrium constants for the two reactions shown? A + B ⇄ 2 C, K₁; 2 A + 2 B ⇄ 4 C, K₂.

    asked on May 13, 2020
  19. Medical Transcription Editing

    'Sensory was intact to light touch proprioception and pinprick.' I marked the prepositions 'was' and 'to' in this sentence and was marked incorrect. Advice please?

    asked on May 15, 2016
  20. chemistry

    Copper(II) chloride and lead(II) nitrate react in aqueous solutions by double replacement. Write the balanced chemical equation, the overall ionic equation, and the net ionic equa- tion for this reaction. If 10.27 g of copper(II) chloride react, what is

    asked on February 23, 2014
  21. algebra 1

    Madison is making a vinaigrette for her catering service using olive oil that costs forty cent per ounce and apple cider vinegar that costs twenty-five cents an ounce.The ideal batch of vinaigrette has 25% vinegar.If she has already combined 3 cups of

    asked on May 9, 2013
  22. algebra 1

    Solve rational equation 1. 2/b-2=b/b^2-3b+2 + b/2b-2

    asked on April 23, 2013
  23. science

    what is the solute and solvent in a solution made from 15 mL of oxygen and 5 mL of helium?

    asked on November 4, 2010
  24. Managerial Economics

    Textbook authors typically receive a simple percentage of total revenue generated from book sales. The publisher bears all the production costs and chooses the output level. Suppose the retail price of a book is fixed at $50. The author receives $10 per

    asked on September 12, 2009
  25. chemistry

    If the concentration of some reactant, B, is tripled, the rate of reaction triples. What is the order of B?

    asked on May 13, 2020
  26. chemistry

    Consider the reaction 2 A ⇄ 2 D + E. If K = 5 at Temperature T, which direction will this reaction proceed if [A] = 0.5 M, [D] = 1.5 M and [E] = 0.5 M at temperature T?

    asked on May 13, 2020
  27. geography

    Explain the causes of poor service of water

    asked on July 14, 2019
  28. Grammar

    Are these the verbs in this sentence, please help?! 'The patient is alert and oriented and has normal mental status exam.' Verbs: 'is alert' - 'oriented' Thank you.

    asked on May 15, 2016
  29. math

    Sam needs to cut a piece of sheet metal into 8 pieces, it takes 5 minutes to cut, how many cuts will he make.

    asked on March 30, 2016
  30. algebra

    But I am getting more and more confused. -3-3x=-9????? and x/6=-24 but the there is a negative sign like x - - =-24 6 I know I am over thinking this,but I am confusing myself on these two???

    asked on August 19, 2013

    There is a mass at the end of a 0.6 m string, being swung around overhead at constant acceleration of(3/4)pi rad/sec^2. mass is 39.84 G. Tensile strength is 12.4 newtons need to find how many revolutions there will be before the string breaks, and the time

    asked on March 3, 2013
  32. Physics

    A 1000-kg car moving east at 80 km/h collides head-on with a 1500-kg car moving west at km/h, and the two cars stick together. (a) Which way does the wreckage move and with what initial speed? (b) How much KE is lost in the collision?

    asked on January 28, 2013
  33. MATH


    asked on February 5, 2012
  34. algebra

    Given D=5, E=10 and F=4, evaluate D E/F Multiple choice 1/2 2 25/2

    asked on June 13, 2011
  35. Physical Science

    The speed of a train increases fron 100km/h to 250km/h in 5 min. What is its acceleration

    asked on October 18, 2010
  36. math

    Why was Jesse James in the hospital?

    asked on February 17, 2010
  37. Physics

    A charged particle A exerts a force of 2.39 ìN to the right on charged particle B when the particles are 13.3 mm apart. Particle B moves straight away from A to make the distance between them 16.1 mm. What vector force does particle B then exert on A?

    asked on February 6, 2010
  38. Chemistry pls help

    C6H14(l)->C6H14(g) ->6CO2(g) + 7H2O(g) ->6CO2(g) + 7H2O(l) Hexane is a liquid at room temp. It can be converted into carbon dioxide and water through the above processes. There are 3 steps. Steps 2 & 3 are exothermic, right? I think step 2

    asked on March 31, 2009
  39. inorganic chemistry

    what is the point group and character table for: cis-Fe(CO)4Cl2? I got D2d as the point group and 4,0,0,0,0 as the character table (although I don't think that is correct) THANKS

    asked on March 17, 2009
  40. math

    i don't understand what a horizontal or vertical stretching is of a graph. y=x^3 Find graph horizontally stretched by a factor of 4 and vertically stretched by a factor of 4

    asked on October 2, 2008
  41. chemistry

    The decomposition of acetaldehyde has a rate constant of 4.71 × 10⁻⁸ L/mol/s. What is the instantaneous rate of decomposition of acetaldehyde in a solution with a concentration of 5.55 × 10⁻⁴ M?

    asked on May 13, 2020
  42. Chemistry

    How much energy would it take to warm 30.0g of water at 35 C to the boiling point and boil all the liquid away?

    asked on January 24, 2020
  43. Statistics

    A popular claim nicknamed "freshman 15" states that many college students gain weight in their freshman year. You are give 95% confidence interval as 55.9% < p < 78.4%. correctly interpret the interval.

    asked on October 16, 2018
  44. chemistry

    Look in the owner’s manual of your car to determine the amount of gasoline your tank can hold. Using the information presented in the text, calculate how much carbon dioxide is produced from driving your car for a year assuming that all the gas is octane

    asked on May 30, 2017
  45. ART 101

    There are several, but does any one know at least the top 5 vocabulary words art historians use to describe the work of art? I have three but I would like at least 2 more. I would greatly appreciate it. Thanks

    asked on April 29, 2015
  46. Bus 101

    Which of the following represents the basic accounting equation

    asked on April 3, 2015
  47. geometry

    I have to construct my initials J and E geometrically. I drew a base line with two points. Then I drew a line through them. I thought this was right for the E but it's not. What am I doing wrong? I do know how to make a parallel and perpendicular lines.

    asked on August 2, 2014
  48. 2nd grade math

    Mr foster places 11 garden lights along an 80 meter path. Each light is placed an equal distance apart. How far away is the sixth garden light from the second?

    asked on February 2, 2014
  49. geometry

    Dru is challenged by her geometry teacher to estimate the height of the school flag pole without measuring. She decided to walk off the length of the shadow cast by the pole by successively walking the noted length of her shadow. If dry is 5ft 6 in.tall

    asked on January 30, 2014
  50. Calculus

    Find the derivative. s=t^6tan(t)-sqrt t

    asked on October 8, 2013
  51. algebra 1

    Graph each function;identify the domain and range;and compare the graph with the graph of y=1/x. 1.y=-10/x Domain: Range: Compare: 2.y=1/(x+3)+3 Domain: Range: Compare:

    asked on May 9, 2013
  52. algebra

    the vertices of quadrilateral EFGH are E(-7,3) F (-4,6) G (5,-3) and H (2,-6) what kind of quadrilateral is EFGH

    asked on May 7, 2013
  53. physics

    This question has me stumped because I am not really sure about the capacitor. "Imagine a free electron and a free proton held midway between the plates of a charged parallel plate capacitor. When released, how do their accelerations and directions of

    asked on April 30, 2012
  54. accounting

    I need HELP in journalizing the following please: February 1 Paid $3,750 accounts payable balance due to a supplier. March 15 Received $2,500 partial payment on a $5,000 accounts receivable balance. Wrote off the rest of the account as uncollectible. April

    asked on March 29, 2012
  55. geometry

    true or false Given:

    asked on February 10, 2012
  56. Physics

    Vector {A} points in the negative y direction and has a magnitude of 14 units. Vector {B} has twice the magnitude and points in the positive x direction. Find the direction and magnitude of {A}+{B} counterclockwise from the positive x axis.

    asked on February 4, 2012
  57. eng/lit

    in the sonnet against that time shakespeare in lines 1-12,which of the following is a main verb? a)come line 1 b)shall see line2 c) shalt pass line5 d)shall find line8 e)do ensconce line 9?

    asked on October 6, 2011
  58. basic statistics for the behavioral sciences

    on a standard test of motor coordination, a sports psychologist found that the population of a average bowlers had a mean scores of 24,with a standard deviation of 6. she tested a random sample of 30 bowling alley and found a sample mean of 26, a second

    asked on September 12, 2011
  59. calculus

    Find the points of inflection. f(x) = e^(-x^2) I need to know step by step how you would get the points of inflection.

    asked on May 1, 2011
  60. chem

    A sample of O2 gas was collected over water at 23ºC and 711 torr. What is the partial pressure of the O2? (The vapor pressure of water at 23ºC is 21.2 torr.) Partial pressure of O2:_____torr

    asked on April 18, 2011
  61. Math-Probability

    What are the odds in favor of rolling a 5 if you roll a 1-6 number cube?

    asked on March 21, 2011
  62. grammar

    In the following sentence, what is the phrase with the single participle: "Then, for no apparent reason, he let out a terrible cry, a rattle such as I have never heard before, and, his mouth open, thrust his head toward the steaming liquid."

    asked on November 26, 2010
  63. confidentiality of health information

    comp;are and contrast contributory negligence with comparative negligence

    asked on November 16, 2010
  64. Chemistry

    word equation for Potassium Carbonate + Nitric Acid

    asked on April 21, 2010
  65. Managerial Economics

    Help me on this one please? labor usage 3,7,9,11,17,17,20,24,26,28,30 output 1,2,3,5,8,10,15,18,22,21,23 a. does a cubic equation appear to be a suitable specification, given these data? You may construct a scatter diagram to help with this question.

    asked on September 12, 2009
  66. physical science

    why does the temperature of boiling water remain the same as long as the boiling continues? Because it is a pure compound undergoing a phase change. The constant temperature is a requirement of the Gibbs Phase Rule. It is not obvious why this happens. If

    asked on June 22, 2007
  67. physic

    1.What is the gravitational force between two trucks, each with a mass of 2.0 x 10^4 kg, that are 2.0 m apart? (G = 6.673 x 10^11 N•m^2/kg^2) 2.Each tire of an automobile has an area of 0.026 m^2 in contact with the ground. The weight of the automobile

    asked on December 17, 2006
  68. help me unscramble?

    eanhicurr hurricane or rauncher hurricane eanhicurr

    asked on November 29, 2006
  69. Calculus

    Would someone clarify this for me... Is antiderivatives just another name for intergral and why is intergral of a function is the area under the curve? Antiderivatives is another word for integral. Why area? THink on this...the integral is the sum of all

    asked on September 12, 2006
  70. math

    jan is enlarging the sketch shown on a photocopier. which could be the dimensions of her enlargement

    asked on January 6, 2020
  71. Math

    A person spends One-fourth of her income for board, one-twelfth for clothes and one-half for other expenses, and saves $10,000. What is her income?

    asked on December 15, 2017
  72. Math

    Write the equation of a line in slope intercept form that is parallel to the given line and passes through the given point. y = 2x + 3 (1, 7)

    asked on December 13, 2017
  73. Bio

    Intercostal muscles simply explain?

    asked on December 4, 2017
  74. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

    asked on December 1, 2017
  75. As physics

    How do you calculate the braking distance? driver reaction time=0.6s initial speed of car=30ms-1 speed*2= distance*4 Please show all the steps and the equations you used in words the question states initial speed*2 is equal to = distance*4 If you need

    asked on November 30, 2017
  76. As physics

    General braking distance formula /working out please clearly say.

    asked on November 30, 2017
  77. Chemistry

    In my titration method it says trial titration. In my table it says rough titration. I know the meaning of both. But, are they the same thing and could i say my first titration rough value is both the trial titration and rough titration?

    asked on November 28, 2017
  78. physics As

    X - ..- …- ….- ……- ……….- …………..- ………………- …………………- …………………..---------Y -The loss of gravitational potential energy Ep of the rider and motorbike from X to Y is 4.66x10^4 -The kinetic energy Ek of

    asked on November 23, 2017
  79. physics As

    How do you calculate the braking distance? driver reaction time=0.6s initial speed of car=30ms-1 speed*2= distance*4 Please show all the steps and the equations you used in words

    asked on November 23, 2017
  80. math

    Clay earned $2,600 last he paid $234 for entertainment. What percent of his earnings did clay pay in entertainment expenses?

    asked on January 5, 2017
  81. Calculus

    An error in the measurement of the radius of a circle results in an error in the computation of its area. Find and interpret the sensitivity of area (a) of a circle to the measurement of radius, r, when the radius r=2 meters.

    asked on October 22, 2016
  82. Physics

    An electric dipole p-> (-> is vector symbol) where p-> = (5x10^-15 C m, -5x10^-15 C m, 0 C m) located at r-> = (0 m, -0.005 m, 0m) Q = 1x10^-6 C at origin. What's the torque on the dipole?

    asked on September 24, 2016
  83. Math science

    If the numbers never end is zero the end number?

    asked on August 28, 2016
  84. Algebra two

    Find the quotient and remainder 452÷8

    asked on August 28, 2016
  85. Math

    How do you write 210,004,050 in standard form?

    asked on August 28, 2016
  86. maths

    at a soccer stadium, a child's entrance ticket is 20% of that for an adult. a child's entrance ticket is N$ 10.00. how much does an adult entrance ticket cost?

    asked on August 1, 2016
  87. chemistry

    calculate the number of moles of Mg in 0.12g(relative mass of Mg=24)

    asked on May 5, 2016
  88. Math/Precal

    How do i solve for x: (9^2x)/(27^x-2)=81^3x-4

    asked on April 26, 2016
  89. Math

    I need help with this problem. It says What is the reciprocal of 0.06? Would I change 0.06 to a fraction which is 6/100 and flip it over?

    asked on April 8, 2016
  90. Spanish

    Please check my answer. Are all the accent marks, grammar, and spelling correct? ¿Qué hago para ponerme en forma? Para ponerme en forma hago ejercisios y como bien.

    asked on April 5, 2016
  91. Spanish

    ¿Qué obras de arte o de literatura influyen en tu vida? What would be an answer to this? I believe the question is asking what art or literature has influenced your life.

    asked on April 5, 2016
  92. Physics

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

    asked on March 13, 2016
  93. Physics

    A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2

    asked on March 13, 2016
  94. trigonometry

    You are to run a conduit diagonally cross a parking lot that is 200 ft log and 60 ft wide. How much conduit will you need to complete this run?

    asked on February 7, 2016
  95. maths

    Mr B is now twice as old as his younger brother. Eight years ago he was three times as old as his younger brother was then. How old is the younger brother now?

    asked on February 3, 2016
  96. physics

    Suppose 3.0 cm of rain at 10°C falls on a rectangular region of dimensions 2.0 km x 3.0 km. How much energy was released when water vapor condensed to form this amount of rain?

    asked on February 3, 2016
  97. physics

    0.50 L of water at 16°C is poured into an aluminum ice cube tray of mass 0.250 kg at the same temperature. How much energy must be removed from this system by the refrigerator to turn the water into ice at -8°C?

    asked on February 3, 2016
  98. physics

    Ice is added to 0.75 L of water at 20°C to make very cold water at 0°C. If enough 0°C ice is added so that the mixture becomes all liquid, how much liquid is in the pitcher when this occurs? Density of water = 1.00 x 103 kg/m3.

    asked on February 3, 2016
  99. math

    bob sold 425 tickets for a dance. tickets cost $18 per adult and $6 per child. Total receipts were $6450, how many children tickets were sold?

    asked on December 28, 2015
  100. Algebra 1

    The length of a rectangle is 3 cm more than the width. The perimeter of the rectangle is Cm. What is the length and width of the rectangle?

    asked on November 16, 2015


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