Questions Asked on
September 30, 2017

  1. Chemistry

    How much reaction is complete when Kc=1, options: a.10% b.25% c.50% d.100% please explain the answer

    asked by Plzzzhelppppmeee
  2. history

    Which most accurately describes ancient Phoenicia’s agricultural practices? Phoenicia did not have much land for farming, but did grow fruits, wheat, olives, and grapes for wine Phoenicia had plenty of fertile land, where plums, apples, oranges, and

    asked by Kira
  3. tourism and hospitality

    Which most accurately demonstrates the development of civilization and culture in the Neolithic era? people progressed in metal work, now making steel tools instead of bronze tools people followed a nomadic lifestyle dependent on the migration patterns of

    asked by Kira
  4. maths

    If a= 2cosx+ isinx and b = 2cosy +isiny then prove that a+b = 2cos(x-y)(cos(x+y)+isin(x+y))

    asked by neha
  5. Chemistry

    Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br-79 atoms in a sample of bromine. PLease help i'm really stuck Someone said: The total for 79 and 81 is 100% and the total for fraction

    asked by 0oooooooo0
  6. Physics

    How do you set up and solve this question Ben (55 kg) is standing on very slippery ice when Junior (25 kg) bumps into him. Junior was moving at a speed of 8 m/s before the collision and Ben and Junior embrace after the collision. Find the speed of Ben and

    asked by Felice
  7. Chemistry


    asked by 0oooooooo0
  8. Physics

    A satellite is put into an orbit at a distance from the center of the Earth equal to twice the distance from the center of the Earth to the surface. If the satellite had a weight at the surface of 4000 N, what is the force of gravity (weight) of the

    asked by Felice
  9. Maths

    Two ships leave from the same port. One ship travels on a bearing of 157 degrees at 20 knots. The second ship travels on a bearing of 247 degrees at 35 knots. (1 knot is a speed of 1 nautical mile per hour). Calculate the bearing of the second ship from

    asked by Carly
  10. maths

    If a=cos2x+isin2x ,b=cos2y +isin2y prove thAt a+b=2Cos(x-y)(cos(x+y)+isin(x+y))

    asked by moyeon
  11. Chemistry

    Lithium has 2 isotopes. The relative atomic masses are 6.02 and 7.02. The average relative atomic mass of lithium is 6.94. What is the calculated relative abundance of the lighter isotope?

    asked by Min
  12. MATH

    Amy is "n" years old. Bob, her brother, is 9 years older than amy. Their mother is 3 times as old as Amy. Theirfather is twice as old as Bob. (i) Write down an expression, in terms of "n" their fathers age??

    asked by Marvin Simukonda
  13. Health care management

    _______ is the process of checking performance against standards. A. Appraising B. Planning C. Controlling D. Organizing B

    asked by Anonymous
  14. Language Arts

    What impact did your Independent Reading selection have on you as a reader? Would you recommend your selection to a friend? Why or why not? Support your response with at least two pieces of evidence from your Independent Reading selection. Be sure to give

    asked by Mark
  15. history

    Which accurately describes the Roman Empire’s influence on the Celts throughout northern Europe? there is no evidence that the celts and the romans made contact the celts resisted roman rule by successfully defeating Julius ceasar advancing armies in

    asked by Kira
  16. history

    Which most accurately describes how religion impacted the Mayan culture? mayan priests performed human sacrifices to appease the angry gods the maya shared spiritual beliefs and cultural characteristics with their rivals, the Aztecs the maya believed in

    asked by Kira
  17. Biology

    A farmer grew only one type of onion. All of the onion plants died from the same disease. What can be said of this onion plant population. A. Only few plants were resistant to the disease B. All of the onion plants were resistant to the disease. C. The

    asked by Anne
  18. Physics

    if a machine is capable of accelerating at a constant speed of +20.0m/s^2 calculate the time required for it to go from -5.00m/s to +55m/s

    asked by Sarah
  19. Chemistry

    When 5 grams of wood burns completely and 15 grams of oxygen, 10 grams of water vapor and some carbon dioxide are given off. (How many grams of carbon dioxide would be produced in this example?)

    asked by Plllllzzzzheeeelllppppmeee
  20. Biology

    A farmer wants to propagate a good variety of a crop in a way which maintained all its desirable traits. Which of the following methods should be used? A. Self Pollination B. Vegetative propagation C. Growing seeds produced from this variety D.

    asked by Anne
  21. English

    1. I will hold the door open for you. 2. I will keep the door open for you. 3. I will stay the door open for you. 3. You should hold healthy. 4. You should keep healthy. 5. You should stay healthy. ------------------------------------- Could the verbs,

    asked by rfvv
  22. math

    Calculate the accumulated amount of end-of-quarter payments of $10,000 made at 5.30% compounded monthly for 7 years.

    asked by SANDEEP
  23. English Composition I

    Argumentive Essay (3 pages) Topic question: Should future educational institutions move toward a specialized educational approach (as seen in technical school), and stray from the traditional well-rounded approach? I need help with: -What keywords would be

    asked by Serena
  24. English

    I needed help on finding facts on people who believe in themselves or people who are committed are more successful and achieve their goals.

    asked by HELP NEEDED BADLY
  25. Math

    the number of housing foreclosures in 2009 was 3.998 million, up 81% over 2007. what was the relative change?

    asked by Bo
  26. Algebra

    If $6000 invested for one year yields $390 in interest, find the investment rate. how do I set up this problem?

    asked by Kelley
  27. Chemistry

    How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine has a pKa of 9.6.

    asked by Veronica
  28. college chem

    When the following reaction reaches equilibrium, the concentrations are 2.26 M A, 0.50 M B, and 2.00 M C. Calculate the equilibrium constant. A+2B3C

    asked by please help
  29. Math

    The radii of two circles are 2:3.what is the ratio of their circumference

    asked by Sadiya
  30. Advanced Algebra

    Amanda earned a gross income of $37,250 last year. She made $489.78 in IRA contributions, donated $782 to her favorite charity and paid $1,276.65 in home mortgage interest. If Amanda claims a standard deduction of $5,700 and her exemption is $3,650, what

    asked by Steve
  31. Spanish

    Can you please check my grammar on these four replies? 1) What have you done today before studying Spanish? Antes de estudiar español hoy, me desperté, me duché y desayuné. 2) What would you do with 1 million dollars? Con $1M, viajaría y ayudaría a

    asked by Tracie
  32. Health care management

    Ideally, control should be a/an _______ function. A. retrospective B. anticipatory C. corrective D. reactive D

    asked by Anonymous
  33. Social Studies

    Although Tenochtitlán was a peaceful place, the Aztecs themselves were a warlike people. In the 1400s, Aztec warriors began conquering the other people in the region. Soon, the Aztecs controlled a huge empire. One ruler, the emperor, ruled over all the

    asked by PLEASE ANSWER!!
  34. algebra

    Solve the following equation for p: 5s - 3p = fp + 12 the fp is confusing me so much, I've tried solving it so many times but this keeps getting me

    asked by Kelley
  35. Algebra

    x > – 5 and x < 2 How would I graph this? the greater and less then signs are confusing me

    asked by Jen
  36. Math

    What is the difference between sin and sin theta?

    asked by Ubaid ullah
  37. Algebra

    The cost of a long distance call is $0.31 for the 1st minute and $0.24 for each additional minute. How long can you talk without spending more than $5? (Write and solve an equation.)

    asked by Jennifer
  38. algebra

    The cost of a long distance call is $0.31 for the 1st minute and $0.24 for each additional minute. How long can you talk without spending more than $5? (Write and solve an equation.)

    asked by Jen
  39. algebra

    Three fourths of a number is less than two hundred four. What are the possible values of the number?

    asked by Emma
  40. Chemistry

    the solubility product of barium sulphate at 18°c is 1.5x10^-9.its solubility at same temperature is

    asked by Anonymous
  41. Physics

    A physics student stands on the edge of a cliff 2x meters. He throws his physics homework straight up in the air. Derive an expression to calculate the time taken by the homework to come back to the student.

    asked by Tyler
  42. Centripetal acceleration help

    If a ladybug weighs 20g and is circling at a radius of 10 cm at 10 m/s, what is its centripetal acceleration m/s^2? I know centripetal acceleration = velocity squared/r, and velocity = angular velocity * radius... From these calculations I get 39476.089

    asked by anonymous
  43. chemistry

    Electrons travel in pairs. True or false? My workbook states, "Electrons like to travel in pairs so it's easy to see why covalent bonds form. It seems when an electron is unpaired it is "lonely" and can easily search for a friend. Of course, this is not a

    asked by yup
  44. Social Studies

    Why is the legacy of colonial powers a barrier to democracy in the Middle East?

    asked by Amy
  45. tourism and hospitality

    What country do tourists originate from?

    asked by Kira
  46. English

    a good student requires three essential characteristics; they must have a positive attitude towards learning, are willing to make mistakes, and possess good work habits. I would like a couple paragraph idea starters

    asked by Ryan
  47. Geometry

    ∠ABC and ∠ABD are a linear pair. Prove that m∠ABC + m∠ABD = 180°. Write a paragraph proof

    asked by Kathy
  48. Science

    What caused the outer planets to have surfaces of liquids and gases

    asked by Mell
  49. Geometry

    Given: ∠ABC and ∠CBD are supplementary angles. m∠ABC = 4x + 7, m∠CBD = 2x − 1. Prove: m∠ABC = 123 How do I write this in a two column proof?

    asked by Kate
  50. Physics

    A ball is hit from horizontal ground with velocity (10i+24.5j) ms-1 where the unit vectors i and j are horizontal and vertically upwards respectively. a)State two assumptions that you should make about the ball in order to make predictions about its

    asked by 0oooooooo0
  51. history

    Which most accurately describes the role of Abraham in the Hebrew scriptures? he led his people west from Mesopotamia to canaan, in present day isreal he fought and slew the philistine giant known as goliath he led his people against philistine. after he

    asked by Kira
  52. Geometry

    ∠ABC and ∠ABD are a linear pair. Prove that m∠ABC + m∠ABD = 180°. Write a paragraph proof...I don't know how to write this out

    asked by PLEASE HELP ME
  53. math

    Segments MN, LT, PQ, and OR all intersect at point S. If m∠LSO = m∠PSN , prove m∠LSP = m∠OSN . write a two column proof

    asked by Rachel
  54. BioChem

    Calculate the final concentration of ONPG (in μM) if you add 6.16 mL of 3.3 μM ONPG and dilute to a final volume of 10 mL with PBS buffer. I thought you would use M1V1 = M2V2 however it came up wrong I know we are adding 3.84 mL of PBS to the 6.16 mL of

    asked by Kody
  55. Chemistry

    Why was the tert butyl chloride washed with aqueous sodium hydrogen carbonate? what gas was evolved during the washing? Write a balance equation

    asked by Issac
  56. science

    Both a globe and flat world map can model features of Earth. Give an example of when you would use each of these models.

    asked by Anonymous
  57. English

    Choose the meaning of the bold words Beowulf/Offered them only his sword, ended/so many JACKAL lives that the few/Who were able skulked silently home.(Beowulf) A:Enemy B:Defender C:Useless*** D:Weakened C:Useless is my this correct?

    asked by marylyn
  58. Math

    the wholesale price of the shows was 62% of their retail price. therefore the wholesale price was what % less than the retail price of the shoes?

    asked by Bo
  59. math

    If the relative change between the original price and the new price is 30% decrease, then the new price is ________% of the original price?

    asked by Shadow
  60. Algebra

    For the Function f(x)=2x²−2x+6, simplify problems A) & B) A) f(x+h) B) (f(x+h)−f(x))/h Please explain the steps you used.

    asked by ALICE
  61. English

    1. He called to her and offered his seat to her. 2. He called out to her and offered his seat to her. 3. He called her and offered his seat to her. --------------------------- Are they all the same in meaning? Which one is commonly used?

    asked by rfvv
  62. Maths

    The cash price of a gas cooker is sh. 9000, a customer bought the cooking gas by 15 monthly instalments of sh. 950 each installment. Calculate the carryin charge

    asked by Joyce
  63. Math

    If a price increased from $4 to $5, then the new price $5 is what % of the original price. What was the relative change in Price? ____% ________

    asked by Bo
  64. PE

    A ________ is the way a person reacts to a situation based on the social environment in which a person grows up. Coping Strategy Defense Mechanism ** learned emotion primary emotion

    asked by Mark
  65. English

    1. I have to prepare for earning money in the future. 2. I have to prepare for making money in the future. 3. I have to prepare for geting money in the future. ---------------------------- Are they all the same? Is 'get money' used frequently?

    asked by rfvv
  66. music

    What is the difference among the musical instruments? Are they different slightly? 1. pipe 2. flute 3. recorder

    asked by rfvv
  67. English

    1. Peel the potatoes and cut them into pieces. 2. Skin the potatoes and cut them into pieces. 3. Remove the peel of the oranges. 4. Remove the skin of the oranges. ------------------------------ Can we substitute 'skin' for 'peel'? Are they all

    asked by rfvv
  68. MATH

    How much should Jessica have in a savings account that is earning 3.50% compounded semi-annually, if she plans to withdraw $2,150 from this account at the end of every six months for 10 years?

    asked by SANDEEP
  69. MATH

    Tiffany invested $725 at the end of every month in an investment fund that was earning interest at a rate of 4.74% compounded monthly. She stopped making regular deposits at the end of 10 years when the interest rate changed to 6.69% compounded quarterly.

    asked by SANDEEP
  70. history

    how did the Agricultural Revolution impact religion and culture?

    asked by Kira
  71. maths

    Falco Inc. financed the purchase of a machine with a loan at 4.88% compounded monthly. This loan will be settled by making payments of $7,200 at the end of every month for 9 years. a. What was the principal balance of the loan?

    asked by SANDEEP
  72. Math

    If Sam paid 109% of the price, then the sales tax rate was what %?

    asked by Bo
  73. Spanish

    Ms. Sue and SraJMcGin, Thank you for your assistance earlier. Might I ask you again for your help with this homework assignment? I needed to read Act II of La dama del alba and answer 10 questions. Can you please check my grammar and sentence structure? 1)

    asked by Tracie
  74. Algebra

    Find the equation using the points. (1/2, -3/2) (-1/2, 1/2) Answer: y=2x-1/2 Please explain why this is the answer.

    asked by Kimmy
  75. Science

    Does the MidAtlantic Ridge have gabbro and peridotite rocks?

    asked by Boruto
  76. Chemistry

    Ytterbium, atomic number 70, is the first element in the Periodic table to have the first four shells full. a) State the number of electrons in the fourth shell/ level of ytterbium (1) b)How many orbitals are there in the third shell of ytterbium? (1)

    asked by 0oooooooo0
  77. Chemistry

    A 8.07g sample of impure Ag2O decomposes into solid silver and O2(g). If 395mL of O2(g) is collected over water at 25 degrees Celsius and 749.2 mmHg barometric pressure, then what is the percent by mass of Ag2O in the sample? The vapor pressure of water at

    asked by Kim