Questions Asked on
July 31, 2011

  1. physics

    A 0.20 kg object, attached to a spring with spring constant k = 10 N/m, is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.080 m. What is its speed at the instant when its displacement is 0.040 m? (Hint: Use

    asked by Anonymous
  2. physics

    At 20 degrees C an aluminum ring has an inner diameter of 5.000 cm, and a brass rod has a diameter of 5.050 cm. Keeping the brass rod at 20°C, which of the following temperatures of the ring will allow the ring to just slip over the brass rod? (Al = 2.4

    asked by Anonymous
  3. physics

    an athlete runs at a distance of 1500m in the following manner:1.starting from the rest he acceralate himself uniformly 2m/s*s till he covers a distance of 900m 2.he then runs the remaining distance of 600m at the uniform speed developed Calculate the time

    asked by abid
  4. biology

    A scientist wishes to determine how effective a vaccine is in protecting rats against a contagious disease. What experimental procedure should the scientist use to determine the vaccine's effectiveness?

    asked by Meelah
  5. Chemistry

    A student actually used 0.847g sample of impure KHP and the endpoint was reached after 19.82 ml of sodium hydroxide solution was added, What is the percent KHP in the unknown to four significant figures.

    asked by BEE
  6. stats

    A manufacturer of automobile batteries claims that the distribution of battery life is 54 months with a standard deviation of 6 months. We take a random sample of 50 batteries. a. Find the probability that their mean life is less than 52 months. b. Find

    asked by michelle
  7. math

    how many gallons of water can fill a pool that is 50 yards by 20 yards and is 9 feet deep (assume 7 1/2 gallons per square foot)

    asked by Anonymous
  8. Algebra 2

    You have $2500 to invest at 6% interest compounded quarterly. For how many years will the money need to be invested for that amount to triple? correct answer is in decimal form rounded to the nearest half year

    asked by Page
  9. MBA Finance

    Sally has won the grand prize in a lottery and must choose between the following three options: A. Receive a lump sum payment of $10,000,000 B. Receive annual end of year payments $2,000,000 for the next 8 years: C. Receive annual end of the year payments

    asked by Anonymous
  10. calculus

    Show that the series(−1)^n−1(bn) where bn = 1/(n^1/2) if n is odd and bn = 1/2^n if n is even, diverges. Why does the alternating series test fail?

    asked by amber
  11. precal 2

    use law of sines to solve the triangle A=58 degree, a=4.5, b=12.8

    asked by raven
  12. ECONOMICS

    1. When McDonald’s Corp. reduced the price of its Big Mac by 75 percent if customers also purchased french fries and a soft drink, The Wall Street Journal reported that the company was hoping the novel promotion would revive its U.S. sales growth. It

    asked by KIM
  13. Accounting

    Complete an Income Statement, Statement of Owner's Equity, and Balance Sheet using the information provided below for Rya’s Planning Services. Cash… …… ……… … … … ………$21,500 Accounts Receivable………17,500 Office Supplies……

    asked by Sara
  14. chemistry

    A 1.00M solution of a hypothetical weak acid (HB) has a pH of 2.85. A solution is created using 0.10M of a salt NaB ('B' being the anion of the weak acid HB) and 50.0 ml of 2.0M acid HB (assume no change in volume). What would be the pH of the solution and

    asked by Hoot
  15. communication

    Compose a 1000-2000 word essay in which you do the following: •Identify a person who is a role model of a communicator to you, and briefly describe the characteristics that make this person a rolemodel of a communicator. Please choose someone you

    asked by latasha
  16. Physical Science

    Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the importance of temperature-regulating

    asked by Ron
  17. Geography

    Discuss the process known as the "Four Modernizations" and how the attitude of the Chinese leaders in this area contrasted in response to the rise of democratic protests. When Mao Zedong died in 1976, a struggle happenned between the Gang of Four and a

    asked by Chandler
  18. physics

    The acceleration due to gravity on the moon is 1.62 m/s2. What is the length of a pendulum whose period on the moon matches the period of a 4.50-m-long pendulum on earth

    asked by Anonymous
  19. Math

    A card is selected from a standard deck of 52 playing cards. A standard deck of cards has 12 face cards and four Aces (Aces are not face cards). Find the probability of selecting ·an eight given the card is a not a face card. ·a club given the card is

    asked by Jen
  20. physics

    A BLOCK OF MASS 20KG MOVING WITH A SPEED OF 18 KM/H EXPLODES AND SPLITS INTO 2 PARTS.ONE PART OF MASS 15 KG COMES TO REST FIND THE VELOCITY OF SECOND PART?

    asked by Anonymous
  21. Physics

    A 110 V, 60 Hz AC line is connected to a 6.55 mH coil. Find the current through the coil.

    asked by Noorah
  22. math.

    A theater purchases $500 worth of Sticky Bears and chocolate bombs. Each bag of Sticky Bears costs $1.50 and each bag of Chocolate Bombs costs $1.00. If a total of 400 bags of candy were purchased, how many bags of Chocolate Bombs did the theater buy?

    asked by Jennifer
  23. math

    i need an answer to the math problem: 90.9 divided by (1.75 x 1.75)

    asked by frances
  24. biology lab

    how to know from the experiment if the oxygen produced as a result of carbon fixation or electron transport? my experiment result show that average bubble/min for tap water is 4.7 while NaHCO3 is 1.8.

    asked by Yuni
  25. physics

    The acceleration due to gravity on the moon is 1.62 m/s2. What is the length of a pendulum whose period on the moon matches the period of a 4.50-m-long pendulum on earth

    asked by Anonymous
  26. Math

    A spherical balloon is being inflated so that its volume is increasing at the rate of 200 cm3/min. At what rate is the radius increasing when the radius is 15 cm.

    asked by Maya
  27. Principles of Marketing

    Identify the strategy decisions a marketing manager must make in the Price area. Illustrate your answer for a local retailer.

    asked by Destiny
  28. Math

    Write the statement in symbols using the p and q given below. Then construct a truth table for the symbolic statement and select the best match. p = I eat too much q = I'll exercise. I'll exercise if I eat too much. Is it q->p?? I do not know how to do the

    asked by Jen
  29. maths

    A ladder lies against a wall.the top of the ladder reaches 8feet above the ground. when the ladder slips 2meters away from the wall,the top of the ladder touches the foot of the wall.then length of the wall?

    asked by Rohith
  30. precal 2

    use the law of cosines to solve the triangle a=55, c=72, b=25

    asked by raven
  31. maths

    if alpha and bita are the zeroes of ax^2+bx+c then evaluate alpha^4+bita^4

    asked by keshav
  32. Math

    In 1976 a research hospital bought half a gram of radium for cancer research. Assuming the hospital is still exists, how much of this radium will the hospital have in the year 6836 if the half-life of radium is 1620 years?

    asked by Kate
  33. physics

    A proton travels in the x direction and enters a region where a constant uniform electric field is directed in the y direction. Derive an equation which describes the x and y cooedinates of the proton in the field as a function of time t.

    asked by Anonymous
  34. precal 2

    use Demoivre's theorem to find the power [5(cos3.2 + isin3.2)]^4

    asked by qui qui
  35. Math...LOST!!

    Heights The frequency distribution indicates the heights of 45 male high school seniors. Height(in.) Number of Males 64 2 65 6 66 7 67 9 68 10 69 6 70 3 71 0 72 2 a) Construct a histogram of the frequency distribution. b) Construct a frequency polygon of

    asked by Jen
  36. math- algebra

    If the principal P = $900, the rate r = 4 1/2, and time t = 1 year, find the following: What is the amount of interest? What is the future value?

    asked by Barry
  37. calculus

    A spherical balloon is being inflated so that its volume is increasing at the rate of 200 cm3/min. At what rate is the radius increasing when the radius is 15 cm.

    asked by Jeffrey
  38. Math

    A car is heading east toward an intersection at the rate of 40 mph. A truck is heading south, away from the same intersection at the rate of 60 mph. At what rate is the distance between the car and the truck changing when the car is 8 miles from the

    asked by eve
  39. Math

    A right circular cylinder is to be designed to hold 750 cm3 of processed milk, and to use a minimal amount of material in its construction. Find the dimensions for the container.

    asked by Mary
  40. English

    Can you please check these few sentences? Thank you. 1) I spent the whole afternoon tidying up my second-holiday home. Are you going to get upstairs by lift/ to take the lift up to the second floor? 2) Are you going to walk upstairs? We spent an awful lot

    asked by Henry2
  41. precal 2

    find the standard form of the complex numbers 5/4 (cos 225degree + isin 225degree)

    asked by raven
  42. MGM255

    •Has Wal-Mart implemented any change management strategies in the last few years to help increase revenue by promoting internal operational efficiencies? Why or why not? •Describe the organizational structure. •Do adjustments need to be made in the

    asked by Jos
  43. Critical thinking

    Assignment: Together We Stand Letter Suppose you live in a new suburban community. It offers all the amenities and benefits of a tight-knit small community, with the benefits of living close to the big city. Some years pass, and several children and adults

    asked by Anonymous
  44. chemistry

    Which one of the following will have the greatest number of moles of potassium ion: 10.0 mL of .10 M potassium hydroxide, 30.0 mL of 0.15 M potassium carbonate, or 25.0 mL of 0.080 M potassium phosphate

    asked by lori
  45. Statistics

    Twenty (20) students randomly assigned to an experimental group are studying for a test while listening to classical music. Thirty (30) students randomly assigned to a control group are studying for the same test in complete silence. Both groups take the

    asked by Jennifer
  46. Math

    Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]

    asked by Sally
  47. physics

    What is meant by the term "uniform electric field"?

    asked by Minenhle
  48. algebra II

    find the 7th term of (x^3/2 y+b^2)^14

    asked by louise
  49. accounting

    angela bennett is an employee at coopers and smith cpa firm. Angela, a part-time student, is working on her graduate degree in history. Coopers & Smith which has an educational assistance program reimburses Angela $6,000 of her educational expenses she

    asked by will smithe
  50. Math

    A conical tank (with its vertex down) is 8 feet tall and 6 feet across its diameter. If water is flowing into the tank at the rate of 2 feet3/min, find the rate at which the water level is rising at the instant when the water depth is 2.5 feet.

    asked by Jeff
  51. Physics

    I have an experiment in which I drop a tennis ball ,, and measure its rebound height in every bounce. one of the question regarding this experiment is - were the collisions elastic or not ? support with evidence. How do these forces magnitude compare with

    asked by AfterLife
  52. physics

    A proton travels in the x direction and enters a region where a constant uniform electric field is directed in the y direction. Derive an equation which describes the x and y cooedinates of the proton in the field as a function of time t.

    asked by Anonymous
  53. Chemistry practice

    Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the bond enthalpy and via the enthalpy of formation)

    asked by Gift
  54. Chemistry practice

    Calculate using the enthaly of formation,the enthalpy of combustion of methanol,CH3OH

    asked by Gift
  55. math

    Suppose that a market research company finds that at a price of p = $30, they would sell x = 36 tiles each month. If they lower the price to p = $15, then more people would purchase the tile, and they can expect to sell x = 41 tiles in a month’s time.

    asked by jean
  56. integral

    complete the integral e^(x^1/3)

    asked by Anna
  57. precal 2

    find the cube roots of the complex numbers -4square root 2(1-i) and write them in both the standard and trigonometric forms.

    asked by qui qui
  58. Chemistry

    Determine the pH of a .50 M solution of H2S04 and also determine the concentration of the sulfate ion (SO42-)

    asked by Hoot
  59. algebra (college)

    The # N, in millions, of hearing impaired individuals of age X can be approximated by N= 0.00006x^3 + 0.006x^2 - 0.1x +1.4. Approximate to the nearest million the # of hearing impaired individuals of ages 25 and 40. 25= 1.75 and 40= 3 (those are

    asked by Lacy
  60. Science

    I need a specific example of how social and cultural influences affect science so I could take students on a field trip to explain a lesson. Does anyone have an idea? Thanks.

    asked by Michael
  61. Writing skills

    I need to write 5 sentences about the role of education in successful financial planning we need to use proper verb tense in each sentence could you tell me if I used proper verb tense in this sentence? These skills help us to use proper mathematical

    asked by Danielle
  62. Math-Confused :(

    Given the bar graph below, create a grouped frequency distribution: Hours per week: 0 1 2 3 Mike 4 5 Don 6 Daniel 7 Jake, Greg 8 Asad 9 Sandra 10 Drake 11 12 Andrea 13

    asked by Jen
  63. Math-Ms. Sue

    The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hour periods. Below is the sample: 142 171 125 91 140 125 97 125 162 142 125 117 89 125 140 128 From this data set, compute the sample mean, median, mode and

    asked by Jen
  64. Math

    A car is heading east toward an intersection at the rate of 40 mph. A truck is heading south, away from the same intersection at the rate of 60 mph. At what rate is the distance between the car and the truck changing when the car is 8 miles from the

    asked by eve
  65. art history

    4. What steps do you believe Samuel Adams and Thomas Hutchinson took toward becoming individuals and which steps ultimately made them such important historical figures?

    asked by Anonymous
  66. Marketing

    Consider any product or service you are familiar with and briefly discuss the four Ps. What initial strategy and tactic is used in each of the Ps.

    asked by Elli
  67. marketing

    What is a marketing plan? What does it provide? Briefly discuss strategy and tactics associated with a marketing plan.

    asked by Elli
  68. algebra

    subtract. (5x^6+9x^4-2x^3-3)-(8x^6=8x^5+x^4-5)

    asked by sheba
  69. Math

    In how many ways can 8 instructors be assigned to five sections of a course in mathematics?

    asked by Melissa
  70. Math

    y=-x^2+1.5x+2 Find the maximum value.

    asked by Kate
  71. College algebra

    Solve. V^2-6v-16=0

    asked by Tim
  72. history

    Why is it significant that the vow was given to a particular person rather than a nation, written constitution, or religion?

    asked by Anonymous
  73. Environmental problems

    How did pre-modern Europeans understand and deal with what we would today call environmental problems?

    asked by Nick
  74. Phil103 Informal Logic

    . If P is false, and Q is false, the truth-value of "P ¡êQ" is (Points : 1) false. true. Cannot be determined. All of the above. 2. What is the truth value of the sentence "P & ~ P"? (Points : 1) True False Cannot be determined Not a sentence 3. If P is

    asked by Juan J
  75. science

    A 0.20 kg object, attached to a spring with spring constant k = 10 N/m, is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.080 m. What is its speed at the instant when its displacement is 0.040 m? (Hint: Use

    asked by Anonymous
  76. English

    In "The Diray of a Young Girl" by Anne Frank, how would one interpret the messages in the poem Anne received from her father for her birthday?

    asked by Xeraan
  77. precal 2

    find the area of the triangle B=72degree 30', a= 105, c=64

    asked by raven
  78. calculus

    Recall that a function G(x) has the limit L as x tends to infinity, written lim(x->infinity)G(x) = L, if for any epsilon > 0, there exists M >0 so that if x > M, then |G(x) − L| < epsilon. This means that the limit of G(x) as x tends to infinity does not

    asked by Anna
  79. Chemistry

    If a sample of K3PO4 is found to contain 1.81 grams of K+ ions, how many PO3- 4 ions are present?

    asked by Heather
  80. Finance and Economics

    Calculate the NPV of the cash flows expected in 2006-2010 using only the 2005 Cost of Capital (don’t worry about increasing costs of capital). Calculate the NPV of the cash flows using the CASH FLOW figures at the bottom of the spreadsheet, these are the

    asked by Pupitas
  81. Geometry

    What is the volume of a regular pyramid if it has a square base, one side of the base measures 4 cm, and the altitude is 5 cm?

    asked by Brianna
  82. human service

    Where would I find information on how walmart measures customers satisfaction and the tools that are used to measure quality planning

    asked by patiance
  83. Physics

    Pretend our future colonists build a large round 2km diameter train track on the great plains of Mars that is sloped (angled) inward to artificially increase the gravity felt by the occupants living onboard the house sized train cars speeding along at the

    asked by Mark Main
  84. CIS

    power point presentaion Cis 105

    asked by Anonymous
  85. physics

    if p=k/v, what happens to v if p is doubled? please help me. :)

    asked by carlnicaca
  86. math

    A card is selected from a deck of 52 playing cards. Find the probability of selecting · a prime number under 10 given the card is a heart. (1 is not prime.) · a diamond or heart given the card is red. · a King, given that the card is not a spade. Show

    asked by Melissa
  87. algebra

    express in terms i. 2-sq.rt. 36

    asked by sheba
  88. chemistry

    four grams of he are in a sealed, 2l container. If he were a true ideal gas, how would its behaviour differ from its actual behavior

    asked by marjani
  89. chemistry

    four grams of he are in a sealed, 2l container. If he were a true ideal gas, how would its behaviour differ from its actual behavior

    asked by marjani
  90. Psychology

    Like the popular belief that older adults do poorer in schools than their younger counterparts, the midlife crisis___________________. 1.is more accurate when describing an older population. 2.is more accurate when describing adolescents. 3.occurs more

    asked by Pete
  91. engineering

    How has hydraulic engineering altered local and regional environments?

    asked by Sabrina
  92. Natural Resources

    In what ways did or does tradition play important roles in the management of natural resources in history?

    asked by Rose
  93. Road Building+Environment

    In what ways did the technology of metal making and road building alter humanity's relationship with their environment during ancient times and before?

    asked by James
  94. science

    if an objective is massive truck parked along road side, it will probably not move.a student justifies this by answering two equal and opposite forces cancel each other. comment on this logic and explainwhy the truck does not move.

    asked by sssg
  95. Math

    2.65E4 moles e x (6.022E23 e/mole e) x (1 e/1g) = ? kg.

    asked by Mak
  96. algebra

    driving at 46 mph one covers 19mi. in how many seconds?

    asked by elaine
  97. math

    What is the kinetic energy of an arrow that weights 324 grains traveling 294 fps ?

    asked by Anonymous
  98. math algebra 2

    10^x=3.26

    asked by Anonymous
  99. Algebra 2

    5^(x+1)=24

    asked by Anonymous
  100. MUSIC APPRECIATION

    in what ways Mozart’s Requiem, a setting of the Catholic Requiem mass, and Brahms’ Lutheran German Requiem reflect the musical and religious culture of their respective churches?

    asked by MzJohnson
  101. aed

    Students’ Rights and Teachers’ Responsibilities Scenario

    asked by Anonymous
  102. Middle childhood Psychology

    Is it important to start children in school according to the normal ages where they go through different mental stages? I notice that the same information is presented to children throughout the educational system but at different times so that the child

    asked by Sharon
  103. geometry

    Two congruent equilateral triangles have sides of 34 mm and 6x-2 mm. Find the value of x.

    asked by maria
  104. stats

    We are interested in customer satisfaction ratings for a particular video game. In a group of 65 customers, we nd a sample mean of 42.95 and the standard deviation is 2.64. Find a 95% Con dence interval for u.

    asked by michelle
  105. phi 103

    "The Senator wants to cut spending on police. I guess she doesn't care if we all get murdered" May commit which fallacy?

    asked by bob
  106. Calc 2 taylor series

    use the definition of a taylor series to find the Taylor series (centeredat c) for the function. f(x)= 7/x c=1 so what is f(x) as n goes from 0 to infinity?

    asked by Em
  107. Math

    Below are the home states of 17 college professors. Ohio Georgia New Jersey Georgia Nebraska Michigan Ohio Pennsylvania South Carolina New Jersey New Jersey South Carolina Wisconsin Michigan Pennsylvania Ohio Wisconsin i. Make a frequency table using these

    asked by Jen
  108. Math-geometry

    Write the statement in symbols using the p and q given below. Then construct a truth table for the symbolic statement and select the best match. p = I eat too much q = I'll exercise. I'll exercise if I eat too much.

    asked by Jen
  109. math

    expand (1/a+√a)^5

    asked by louise
  110. algebra II

    expand (2-i)^12

    asked by louise