Popular questions and responses by Gloria
  1. Physics

    In a simple machine, the energy input is 120j. If the efficiency of the machine is 80%. Calculate the energy output

    asked on March 29, 2017
  2. geometry

    A comet's path can be modeled by one branch of the hyperbola y2 1096 􀀀 x2 41334 = 1; where the sun is at the focus of that part of the hyperbola. Each unit of the coordinate system is 1 milloion miles. nd the coordinates of the sun(assuming it is at the

    asked on August 3, 2020
  3. physics

    If motor M exerts a force of F=(10t2+100)N on the cable, where t is in seconds, determine the velocity of the 25kg crate when t=4s . The coefficients of static and kinetic friction between the crate and the plane are μs=0.3 and 0.25 μk=0.25 . The crate

    asked on November 7, 2013
  4. chayyenne

    A 26' long painting is how many yards long?*

    asked on July 5, 2014
  5. Maths

    Convert 59.4 mi to km (1 m= 1.094 yd, 1 mi=mi=1760yd)

    asked on October 19, 2017
  6. Analytical chemistry

    Below i wrote a few problems, i did them all but in the book i don't have results, so i don't know if i did them right or not. I would really appreciate if someone would go through the problems and tell me if i got the right results. If i made a mistake

    asked on August 3, 2013
  7. Analytical chemistry

    A dilute perchloric acid solution was standardized by dissolving 0.2445 g of primary standard sodium carbonate in 50 mL of the acid, boiling to eliminate CO2, and back-titrating with 4.13mL of dilute NaOH. In a separate titration a 25mL portion of the acid

    asked on August 1, 2013
  8. Math

    Three people who work full-time are to work together on a project, but their total time on the project is to be equivalent to that of only one person working full-time. If one of the people is budgeted for one-half of this time to the project and a second

    asked on December 8, 2012
  9. Sociology

    Write a 700- to 1,050-word essay in which you complete the following: Give a brief introduction that identifies the issue you have chosen and why.Describe in three separate paragraphs how each perspective would view or explain the issue.Include in your

    asked on December 6, 2015
  10. Chemistry

    The following unbalanced equation describes the reaction that can occur when (II) sulfide reacts with oxygen gas to produce lead (Il) oxide and sulfur dioxide gas: PbS+O2---> PbO + SO2 Balance the equation and describe in words the electron transfers that

    asked on May 8, 2015
  11. adverbs and other parts of speech

    3. Which one of the following sentences does not contain a prepositional phrase?

    asked on November 14, 2012
  12. Business

    Assignment for week 5 Given the following information, draw the project network. Compute the early, late and slack times for the project network. which activities are on the critical path have only the start or finish of the activity on the critical path?

    asked on December 6, 2010
  13. Chemistry

    please say if molecule is polar or nonpolar: H2 HBr BrCl CS2 H2S

    asked on June 2, 2014
  14. MATH

    solve the system of linear equations using the Gauss- Jordan elimination method x1- x2+ 4x3 = 15 x1+ x2 = X3 = 4 -3X1-X2 + X3 = -2

    asked on September 10, 2011
  15. physics

    A torque of 77.7Nm causes a wheel to start from rest , completes 5.55revolutions and attains a final angular velocity of 88.8rad/sec . What is the moment of inertia of the wheel?

    asked on June 21, 2020
  16. Analytical chemistry

    The iron in a 0.6656 g ore sample was reduced quantitatively to the +2 state and then titrated with 26.753 g of KMnO4 solution. Calculate the percent Fe2O3 in the sample. the mass i get for fe2o3 is too big, but i don't know how else to do this problem,

    asked on August 3, 2013
  17. medical terminologhy

    combining form and suffix to form number 1 abnormal softining of a kidney

    asked on April 20, 2013
  18. Chemistry

    When 50.0g of silicon dioxide is heated with an excess of carbon 32.2 g of silicon carbide I'd produced. SiO2(s) + 3C(s) → SiC(s) + 2CO(g) A. What is the percent yield of this reaction? B. How many grams of CO gas are made?

    asked on January 7, 2013
  19. chemistry

    In 1934, Edward A. Doisy of Washington Univeristy extracted 1361 kg og hog ovaries to isolate a few milligrams of a potent female hormone. Doisy burned 5.00 mg of this precious sample in oxygen and found that 14.54 mg of CO2 and 3.97 mg of H2O were

    asked on September 27, 2012
  20. chemistry

    If some of the CaCO3 in the sample had already formed some Ca(HCO3)2, will the volume of CO2(g) generated in the reaction be greater,less than or the same as in the experiment? Explain

    asked on November 2, 2011
  21. calculus

    A farmer wants to make three identical rectangular enclosures along a straight river, as in the diagram shown below. If he has 1200 yards of fence, and if the sides along the river need no fence, what should be the dimensions of each enclosure if the total

    asked on April 20, 2020
  22. statistic

    A marriage counselor conducted a study of couples, categorizing each of the couples as "communicative" or "non-communicative." Among other things, the counselor wanted to see whether the percentage of communicative couples whose marriage ended in

    asked on November 19, 2018
  23. calculus

    A spherical balloon is inflated so that its volume is increasing at the rate of 3.2 ft3/min. How rapidly is the diameter of the balloon increasing when the diameter is 1.1 feet?

    asked on January 25, 2017
  24. Physics

    A block is attached to a spring and set in motion on a horizontal frictionless surface by pulling the block back a distance 10cm from equilibrium. Now, replace the block with one double the mass and set the block into motion again by pulling the block a

    asked on April 13, 2016
  25. math

    waiting for my answer on the ageprime factors

    asked on June 14, 2012
  26. PHI103

    is it important for people to study logic

    asked on May 1, 2012
  27. Psychology

    In the 3 domains of development, why is it important to consider each domain in the study of adult development?

    asked on November 16, 2010
  28. lee college

    How many bromine molecules, Br2, have a mass equal to 31.8 g?

    asked on November 17, 2009
  29. psychology

    write a fictional,first person account of the creation and consequences of african americansin the united states

    asked on May 26, 2009
  30. Math

    In a senior secondary school,80 students play football or hockey.The number that play football is 5 more than twice the number that play hockey.If 15 students play both games and every student in the school plays at least one game,find (i)the number of

    asked on October 2, 2018
  31. math

    Nancy is 4 years younger than Monica. Seven years from now the sum of their ages will be 82. How old are they know?

    asked on September 13, 2017
  32. English,sepedi,agriculture,economics,lifesciences,maths literacy & life orientation

    Identify 3human rights violations or discrimination and explain in an introductory paragraph why you choose the specific human rights violation or discrimination

    asked on April 16, 2016
  33. Pre-algebra

    Which expressions are equal to 120 Multiple chose 1. 5! 2. 6! 3. 6p3 4. 12p10 I think the answers are 5! and 6p3

    asked on March 9, 2016
  34. Math

    Directions: Solve the following system of inequalities. 1.) 3x + 2y < 6 x > 0 y > 0 2.) 2x^2 + y ≥ 2 x ≤ 2 y ≤ 1

    asked on March 17, 2015
  35. Computerized Accounting

    Consider this statement: "QuickBooks records revenue when an invoice is generated, even though cash has not been received." Is this practice acceptable? Why or why not? What are noncash investing and financing activities, and how are they recorded in

    asked on March 9, 2015
  36. chemistry

    you have a metal tank containing 74.0moles of nitrogen gas at a pressure of 15.0atm.If the pressure is measured at a temperature of 20.0c,then the volume of the tank must be how many liters(Round answer to one decimal place.

    asked on February 12, 2014
  37. Jefferson

    Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq)→ 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc that must react with an

    asked on January 7, 2013
  38. Calculus

    f(x)= (-5x^3 + 3x^2 + 3x -5)/(-8x^2 +2x + 7) Find the equation of the non-vertical asymptote. y = ? Does f(x) intersect its non-vertical asymptote? (yes or no) If yes, what is the smallest value of x at which f(x) intersects its non-vertical asymptote?

    asked on June 3, 2012
  39. maths


    asked on February 18, 2008
  40. Geography

    i like to be a nusing

    asked on September 18, 2019
  41. Algebra

    The height of a triangle is 6 inches less than the base. The area of the triangle is 67.5 square inches. Find the length of the base and the height of the triangle.

    asked on September 8, 2019
  42. math statistics

    IQ scores in the US population have an average of µ = 100 and a standard deviation of σ = 15. Suppose a researcher wanted to test whether socioeconomic status (SES) has an effect on IQ scores. The researcher takes a random sample of n = 100 people,

    asked on January 12, 2019
  43. Algebra

    How would you solve the problem - A class wanted to collect 325 cans and on the first week they collected 135 cans, the second week they collected 89 more cans what will they need to collect on week three?

    asked on October 12, 2018
  44. Math

    How do i solve this -given that p and q are sets of real numbers such that p=(x:0 is lesser than or equal to x is lesser than or equal to 3)and q=(x:3 is lesser than x is lesser than 2),find p union q

    asked on October 2, 2018
  45. Economics

    Retrieve the average total cost function given that the total cost=Qsquared+5Q+6

    asked on January 10, 2018
  46. Math

    The sixth term of an appointment is 37 and the sum of the first sixth term is147 find the first term,find the sum of the first fifteen terms.

    asked on August 24, 2017
  47. Information systems

    Is video conferencing really a viable green alternative to travel for most companies

    asked on March 21, 2017
  48. Chemistry

    At 3745°C, K = 0.093 for the following reaction. N2(g) + O2(g) equilibrium reaction arrow 2 NO(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 2.0 g N2 and 3.0 g O2 are mixed in a 1.3-L flask. [N2] [O2]

    asked on February 27, 2017
  49. U.S. History (help)

    In the U.S. House of Reps. When California gains a representative, then another state must have what? How often can the number of representatives be adjusted? After a what?

    asked on February 15, 2017
  50. calculus

    Use implicit differentiation to find an equation of the tangent line to the curve 3xy^3+4xy=63 at the point (9,1)(9,1).

    asked on January 25, 2017
  51. explore career

    If john got paid $12.00 an hour and he worked 40 hours, how much is his gross pay?

    asked on December 15, 2016
  52. 6th grade math

    98.547/4.93 985-493=437 4377-4437=4877 4877-4437=4400 here's where we get stumped the calculator shows we should have a 9 in out answer

    asked on October 17, 2016
  53. Math

    find four consecutive odd integers such that the sum of the least integer and greatest integer is 164

    asked on October 15, 2016
  54. Math

    Find the volume of a cone with a radius of 4yd and a height of 10yd.round to the nearest tenth.

    asked on October 13, 2016
  55. Math

    If Mary ate two apples and Bob ate three apples, how many apples did Mary eat.

    asked on September 11, 2016

    A cell phone emits signs in approximately 750 Mhz. Which is the wavelength and energy of this radiation

    asked on April 22, 2016
  57. Chemistry

    2.16 grams of silver react with 3.20 grans of sulfur.Caculate the mass of silver sulfide produced (mass of ag=108.8g/mole)

    asked on April 21, 2016
  58. Family Dynamics

    One important approach for teachers working with diversity in individual families is to be __________________.

    asked on October 30, 2015
  59. Statistics

    for a population with m=62 and s=12, find the x value that corresponds to esch of the following z-scores: -0.25,-1.50,0.50,2.00

    asked on October 14, 2015
  60. physics

    you walk west for 52 m, then you walk 33.2° north of west for 44 m, and finally you walk due north for 25 m. Find the components of your final displacement, from your initial to final point, along the north and west directions.

    asked on May 21, 2015
  61. Chemistry Help, Please!!!

    The Kw of water varies with temperature. Calculate the pH of water at 46℃ with a Kw=1.219 x 10 to the negative 14th.

    asked on May 8, 2015
  62. Chemistry

    Iron -59 has a half -life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Show all calculations leading to a solution.

    asked on May 8, 2015
  63. Chemistry

    If 5.40 kcal of heat is added to 1.00 kg of water at 100C, how much steam at 100C is produced? sHOW ALL CALCULATIONS LEADING TO AN ANSWER. Q=m*Hf 5.4=m*80 m=5.40/80=0.0675kg

    asked on May 4, 2015
  64. Math

    Hi! I need help with this question. Thank you! Directions: Write the expression for the nth term of the following geometric sequence. 5, 10, 20, 40, ...

    asked on April 20, 2015
  65. Math (ASAP)

    Solve the following inequalities. 1.) 3x + 2y < 6 2.) 2x^2 + y ≥ 2

    asked on March 17, 2015
  66. Accounting

    Consider this statement: "QuickBooks records revenue when an invoice is generated, even though cash has not been received." Is this practice acceptable? Why or why not?

    asked on March 9, 2015
  67. history

    roosvelts phisophy and goverment

    asked on January 14, 2015
  68. science

    name four phylum under the five kingdoms

    asked on January 12, 2015
  69. Algebra

    you need 3 3/4 yards of material for 1 shirt how many shirts can you make with 116 1/4 yards of material

    asked on September 12, 2014
  70. Business

    As preserve makes headway into the larger retail chains, what challenges will it face?

    asked on August 27, 2014
  71. Chemistry

    when the pressure on 2.5liters of oxygen is decreased from 2.0atm to 1.0atm,the volume of the gas becomes how many liters.(round answer to one decimal place.

    asked on February 12, 2014
  72. Patterns,Algebra ans Functions

    This line represents the line on a graph tha shows how long it took Khalil to walk to school.The horizontal axis shows the time and the vertical axis shows blocks covered.Explain what you think happened on Khalil's way to school?

    asked on January 22, 2014
  73. business math

    mary smith purchased a new car for $28,750. she made a 15% down payment and financed the balance at her bank for 3 years. what payments are required at the end of every month, at 18% interest, to pay off the loan?

    asked on December 16, 2013
  74. asking for a teacher's opinion

    Do you think rounding borderline letter grades up or down is a fair practice? Or should they just stay where they are? For example, I think that an 89.5% should round up to a 90%. I have one instructor right now who considers an 89.99% to still be a B

    asked on December 6, 2013
  75. math

    I am trying to help my grandson with a fraction problem, Mary has 12 marbles 3/12 are yellow,2/12 are blue and the rest are green, I need to explain how many of them are green where he will understand

    asked on October 28, 2013
  76. math modeling

    A spherical balloon has a radius of 11 centimeters. If we increase the radius by 2 centimeters, how much did the volume increase?

    asked on October 25, 2013
  77. Analytical chemistry

    I did the next problem, i don't have the results for it and i just want to know if i calculated the mass for Fe2O3 the right? A sample is a mixture of iron oxides (Fe2O3 and FeOOH). It's known that at 200°C this reaction occurs: 2FeOOH(s)-> Fe2O3(s) +

    asked on September 7, 2013
  78. Analytical chemistry

    What is a pH of 20 mL of 0.08 M NH3 added to 40 mL of 0.04 M HCl? NH3 + HCl = NH4+ + Cl- c(NH3)=(0.02L * 0.08M)/0.06L= 0.02667 M c(HCl)=(0.04L * 0.04M)/0.06L= 0.02667 M c(NH4+)=c(HCl) Kb=[NH4+][OH-]/[NH3] Kb=1.76*10^(-5) So i tried to calculate it like

    asked on September 2, 2013
  79. Analytical chemistry

    A Kjeldahl analysis was preformed upon a 0.055 g sample of impure biguanide (C2H7N5, fw=101.1). The liberated ammonia, collected in 40 mL of 4% boric acid was titrated with 19.51 mL of 0.1060 M HCl. Calculate the percentage of biguanide in the sample.

    asked on August 1, 2013
  80. Analytical chemistry

    A 5ml portion of table wine was diluted to 100 ml in a volumetric flask. The ethanol in a 20 ml aliquot was distilled into 100 ml of 0.05151M K2Cr2O7. heating completed oxidation of the alcohol to acetic acid: Ch3Ch2OH + 2Cr2O7(2-) +16H(+) -> 3Ch3COOH +

    asked on July 30, 2013
  81. Analytical chemistry

    A 25 ml sample of household bleach was diluted to 500 ml in a volumetric flask. An unmeasured excess of potassium iodide was aded to a 20 ml aliquot of the diluted sample; the iodine liberated in the reaction: OCl- + 2I- -> I2 + Cl- + H2O required 34.5 ml

    asked on July 30, 2013
  82. math

    a particle moves along the x-axis so that its velocity is proportional to x^2. Prove that its acceleration is proportional to x^3

    asked on June 2, 2013
  83. substance

    10-15 lines critically discuss 5 ways in which the human problem impacts on the community

    asked on May 3, 2013
  84. nutrition

    5 ways in which human or environmental problem impacts on the community

    asked on May 2, 2013
  85. health

    name 5 ways which human or environmental problem impacts on the community

    asked on May 2, 2013
  86. Algebra 1

    If the side of a rectangle measures 10.5 cm to the nearest millimeter,what is the upper bound and lower bound of the side of the rectangle?

    asked on April 25, 2013
  87. Science

    State in words the specific information conveyed by a label reading 0.25M Oxalic acid.

    asked on January 16, 2013
  88. pre algebra

    Actual train size 40 feet gives a model size of 3 inches which scale was used?

    asked on December 3, 2012
  89. Physics

    a car that weights 15000 N is initially moving at 60 km/hour when the brakes are applied. The car is brought to a stop at 30 meters. Determine the magnitude of the braking force

    asked on November 14, 2012
  90. the parts of speech

    10. In the following sentence, identify the part of speech of the italicized word. Catching fish is one of the oldest pastimes.

    asked on November 14, 2012
  91. Geology

    Wood fragments from the floor of a palace in Syria - Syro-Hittite period. Date: 675 ± 50 years BCE

    asked on November 5, 2012
  92. chem

    What mass of H2C2O4 can react with 35.0 mL of 1.50 M KMnO4 according to following equation?

    asked on October 16, 2012
  93. chemistry

    what is the molarity of a solution prepared by dissolving 63.0 g NaF in enough water to make 250.0 mL of solution?

    asked on October 16, 2012
  94. chem

    what is the mass in grams of the following 6.78 mol of NaI

    asked on October 11, 2012
  95. aed204

    top ten charactertistics of multiculturlal school

    asked on September 25, 2012
  96. intentive spellers typically

    a. write only words they are certain can be spelled corrctly. b. never learn conventional spelling c. omit consonants in words d. Progress through a serious of stages

    asked on September 9, 2012
  97. math

    The ages of a population of 300 is normally distributed, with a mean of 45 and a standard deviation of 4. If you randomly selected a member of the population, what is the probablity that his or her age would be greater than 49?

    asked on June 11, 2012
  98. math

    Solve for x. 3ln(x)-2=16+7ln(e)

    asked on June 11, 2012
  99. phi103

    ourarguments? Are there disadvatages to using this technique to make the structure of our arguments more explicit and clear?

    asked on May 1, 2012
  100. Comunity school

    When using fraction strips, how do you know that two fractions are equivalent?

    asked on February 26, 2012


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