Questions Asked on
September 25, 2009

  1. Physics

    A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively.

    asked by Ashley
  2. Calculus

    A plane flying with a constant speed of 5 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 10 minutes later? I got

    asked by Z32
  3. physics

    a boy throws a stone straight upward with an initial speed of 15.0m/s. what mazimum height will the stone reach before falling back down.

    asked by john
  4. chemistry.

    A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be?....IS IT NOT SO2???

    asked by Help me
  5. College Physics

    A turntable reaches an angular speed of 33.3 rpm, in 2.0 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? (b) How many revolutions does the turntable make during this time interval?

    asked by Megan

    Your uncle offers you a choice of $30,000 in 50 years or $95 today. If money is discounted at 12 percent, which should you choose?

    asked by Anonymous
  7. bio

    An organism is composed of two layers of cells. A student is observing one of the layers with a compound microscope under high power. To observe the second layer of cells, the student should 1 rotate the nosepiece 2 adjust the mirror 3 turn the fine

    asked by Anonymous
  8. Chem

    A flask weighs 95 g when empty. When filled with 200 mL of a certain liquid, the weight is 328 g. What volume (in milliliters) would 1,000 g of the liquid occupy? I am confused on set up I know d=m/v so v=m/d

    asked by Shanel
  9. Physics

    A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35.

    asked by Ashley
  10. Math

    In a population of exam scores, a score of X=88 corresponds to z= +2.00 and a score of X=79 corresponds to z= -1.00. Find the mean and standard deviation for the population.

    asked by Jen
  11. statistics

    In a population of exam scores, a score of X=88 corresponds to z= +2.00 and a score of X=79 corresponds to z= -1.00. Find the mean and standard deviation for the population.

    asked by Jen
  12. Math- calculus

    Given f(x) = x ^ 3 - x ^ 2 -4x +4 Find the zeros of f. Write an equation of the line tangent to the graph of f at x = -1 The point (a,b) is on the graph of f and the line tangent to the graph at (a,b) passes through the point (0,-8) which is not of the

    asked by Erin
  13. physics

    A house painter uses a chair and pulley arrangement to lift himself up the side of a house. The painter's mass is 69.2 kg and the chair's mass is 24.0 kg. With what force must he pull down on the rope in order to accelerate upward at 0.379 m/s2?

    asked by Anonymous
  14. Orgo

    The solubility of compound A in ethanol is .8g per 100ml at 0degreesC and 5.0g per 100ml at 78degreesC. What is the minimum amount of ethanol needed to recrystallize a 12.0g sample of compound A? How much would be lost in the recrystallization, that is,

    asked by Lea
  15. chemistry.

    What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? ..My answer is NaSO and I am not sure... can anyone help me for it?????????

    asked by Help generation
  16. Statistics

    When circuit boards used in the manufacture of compact disc players are tested, it is discovered that each has a 5% chance of being defective. Suppose that a batch of 25 of these circuit boards is randomly selected. Would this be binomial or poission

    asked by Bert
  17. MATH

    Write each of the following ratios in simplest form. 1. The ratio of 5 3/5 to 2 1/10 A~8 TO 3? 2. The ratio of 7 dimes to 3 quarters A~ 14 TO 15?

    asked by A~
  18. physics

    a bullet traveling horzontally at a speed of 350m/!@#$%^&s board perpendicular to its surface passes through n emerges on the other side at a speed fo 210m/s. if the board is 4.00cm thick, how long does the bullet take to pass through it.

    asked by john
  19. phys

    A small metal cylinder rests on a circular turntable that is rotating at a constant speed. The small metal cylinder has a mass of 0.20kg, the coefficient of static friction between the cylinder and the turntable is 0.080, and the cylinder is located 0.15m

    asked by Chelsea
  20. College Physics

    A pendulum is 0.50 m long and the bob has a mass of 1.0 kg. At the bottom of its swing, the bob's speed is 1.6 m/s. What is the tension in the string at the bottom of the swing?

    asked by Megan
  21. College Physics

    A cyclist starts from rest and pedals so that the wheels make 7.7 revolutions in the first 5.1 s. What is the angular acceleration of the wheels (assumed constant)?

    asked by Megan
  22. physics

    The average speed of a nitrogen molecule in air is about 686 m/s, and its mass is 4.85×10-26 kg. If it takes 3.78×10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in the opposite direction, what is the magnitude of

    asked by Anonymous
  23. physics

    A 62.9 kg spacewalking astronaut pushes off a 697.0 kg satellite, exerting a 117.0 N force for the 0.977 s it takes him to straighten his arms. How far apart are the astronaut and the satellite after 3.57 min?

    asked by Anonymous
  24. bio...

    The main result of aerobic respiration is the 1 conversion of radiant energy into chemical energy 2 production of lactic acid as an end product 3 storage of energy in a polysaccharide 4 production of ATP from the breakdown of glucose

    asked by Anonymous
  25. chemistry

    What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

    asked by irma
  26. Economics - PPF

    Points on the graph: A(4,140) B(12,120) C(8,100) D(14,80) E(8,60) a) According to the PPF, Person A has ___ hours to allocate between work and leisure. b) Between points C and E, the opportunity cost of earning an additional $10 income is ___. c) Between

    asked by Anonymous
  27. Math


    asked by Mikki
  28. Chemistry

    which of the following compounds dissolve in water?? -Sodium Nitrate (NaNO3) - Sucrose (C12H22O11) - Sodium Chloride (NaCl) - Potassium Sulfate (K2SO4) - Ethanol (C2H5OH) - Sodium Bicarbonate (Baking Soda)(NaHCO3) - Calcium Sulfate (CaSO4) i did an

    asked by Liz
  29. Calculus

    At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 24 knots. How fast (in knots) is the distance between the ships changing at 3 PM? This is what I got but it's not right 28.727

    asked by Z32
  30. Calculus

    Water is being pumped into an inverted conical tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 28 centimeters per minute when the height of the water is 3.5 meters,

    asked by Z32
  31. C Programming

    This is what the program needs to do: Enter a temperature: 32.4 Enter 'C' for Celsius or 'F' for Fahrenheit: C Choose a conversion ('C' for Celsius or 'F' for Fahrenheit): F The temperature is: 90.3 F. How would I store the input when it asks for C or F,

    asked by gnozahs
  32. Math

    Indicate the metric unit that would be best used to express the mass of the object? A flower petal. My answer is: milligrams. Is this correct? Thanks.

    asked by B.B.
  33. Grade 8 math urgent

    Gervais ate 1/3 of a aguette with his dinner. Chantel ate 1/4 of the leftover bagette as an evening snack. What fraction of the baguette did Chantel eat as a snack. My answer is 1/12. Am I correct?

    asked by Jessica
  34. math

    What is the shortest lenght of television cable that culd be cut into either a whole number of 18ft pieces or a whole number of 30ft pieces?

    asked by cindy
  35. maths

    one mountain is 5000 ft high and can be reached by cable car from another mountain 7000ft away the other mountain is 3000ft high what is the lenghtof the cableto link the two mountains

    asked by andy
  36. art

    hey guys anyone have any ideas of how i can visually present a narrative, (a story)? i need something unique and different as i'm only allowed images in the narrative and no text thanks so much

    asked by anonymous
  37. HCR 240

    Explain why in terms of job performance & efficiency knowing medical billing terms is critical for working in the health care field. can someone help me? thank you

    asked by Lea
  38. Foundations of Research

    Develop a short questionnaire and Analyze the responses and comment on the validity and reliability of your questionnaire.

    asked by Ronnie
  39. math

    A basketball player makes 50% of his shots taken, on a bad night his percentage drops by a factor of 1/2. If he took 12 shots, how many did he make?

    asked by Amber
  40. Literacy

    In "Life without Principle," Thoreau writes, "I would have had him deal with his privatest experience, as the poet does." What does this statement mean?

    asked by Anonymous
  41. physics

    in an air bag test a car traveling at 100km/h is remotely driven into a brick wall. suppose an identical car is dropped onto a hard surface. from what height would the car have to be dropped to have the same impact that with the brick wall?

    asked by john
  42. Calculus

    Water is being pumped into an inverted conical tank at a constant rate. The tank has height 12 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 26 centimeters per minute when the height of the water is 1 meters,

    asked by Parker
  43. ENGLISH1111111111111111

    who was marginalized in "the great depression 1929"? And what other thing were marginalized in "the great depression 1929"? and any info on marginalization? Thanks

    asked by Adam


    asked by JEAN
  45. URGENT: Grade 8 Math

    In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?

    asked by Molly
  46. biology

    hi do dendrites generate or conduct impulses and do axons transmit to and from the cell body or do they transmit it away. thanks jim

    asked by Jim_R
  47. psychology

    description of the central themes and strategies of positive psychology as you understand them from your reading. the reading did not cover the themes of positive psychology. I don't know what to do. I even googled this question and I have not found any

    asked by Tiffany
  48. Grade 8 geography

    In my atlas it says the largest european city is Moscow. But when you look for Moscow it is un Russia. Russia is a county of Asia. I am confused!

    asked by Jessica
  49. grammar

    Which sentence is correct and why? 1. Did you know a famous animal-rights activist has criticized horse racing because of the dangers? 2. Did you know a famous animal-rights ativist have criticized horse racing because of the dangers?

    asked by bgirl
  50. chemistry.

    The molecular of aspartame, the generic name of Nutrasweet, is C14H18O5. The molar mass of aspartame is?

    asked by Jimmy
  51. socials

    why was the king forced to recall Parlament? The king was forced to recall Praliament because he needed money.

    asked by sara
  52. 1st grade

    how can i help my daugther learn to read?

    asked by Anonymous
  53. actually it is about computers

    how do I add sounds with my animation when using powerpoint

    asked by Nathan
  54. College Physics

    A spy satellite is in circular orbit around Earth. It makes one revolution in 5.99 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?

    asked by Megan
  55. College Physics

    A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 86.0°. a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through

    asked by Megan
  56. math

    how do i factor 1) 3x^2+12x-15 2)3x^2-3x

    asked by leslie
  57. math

    explaine how you can fide the length of the missing leg on a right triangle? the lengtth are 4in and 6in

    asked by sara
  58. MATH

    Write each of the following ratios in simplest form. Marc took 3 hours (h) to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc’s time to Angelina’s time as a ratio of whole numbers. ANSWER~6

    asked by A~
  59. MATH

    Find each rate 1. 240 pounds of fertilizer/6 lawns A~ 40? 2. Which is the better buy: 5 lb of sugar for $4.75 or 20 lb of sugar for $19.92? A~the 5 lb bag at 0.95 cents?

    asked by A~
  60. data management

    Tasha has a piggy bank that contains 15 loonies, 30 quarters, 20 dimes, and 7 nickels. a) if she chooses one con at a random to buy some candy, what is the probability of choosing a loonie or quarter? b) if she chooses three coins, all at once , what is

    asked by rock johnny
  61. adult education

    A patient doesnt want her violent boyfriend to know she is having an abortion so she asks her Dr. to send all communications to her post office and to phone her only at work, What should the doctor do and what is the lagel basis for the advice? If she

    asked by Anonymous
  62. physics

    A 5.55 kg block covered in sandpaper is pushed along the ceiling of a room under construction. The block is pushed across the ceiling with a force of 77.9 N directed at an angle of 71.5° to the horizontal. If the coefficient of kinetic friction between

    asked by Anonymous
  63. english

    explain the impact terrorism and cyber crime interpret the fourth amendment?

    asked by Anonymous
  64. 4-th grader

    can sumone unscramble this word .. conshourire

    asked by Anonymous
  65. latin


    asked by Anonymous
  66. chemistry

    What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

    asked by irma
  67. Math

    what is a interger?

    asked by Jake
  68. chemistry

    How much volume in liters will 100.0 g of oxygen occupy at 100 0C and 100 atm pressure?

    asked by me
  69. Yr 10 Geography

    An explanation of the roles and actions of different levels of governments relevant to Australia's Culture

    asked by Janel
  70. 4th grade

    what is the rule for ___,68,___,94,___,120

    asked by cal
  71. onomatopoeia

    This should be relavantly easy and yet,i'm still blank! I just need a couple of examples of sounds in the city and the country in onomatopoeia form. (it's for 2 onomatopia poems,one incity,one in country)

    asked by Jaylee
  72. Economics

    The market is considered to be _____ (black market/equilibrium/disequilibrium/non-competitive) if quantity demanded does not equal quantity supplied. I'm not sure what the answer is... I narrowed it down to either disequilibrium or non-competitive.

    asked by Anonymous
  73. 7th grade

    After taking a shower, you notice that small droplets on the mirror. Explain how this happens and what change its going through. physical and chemical change.

    asked by Kenia
  74. Cost of Accounting

    1-How does an actual system differ from a normal costing systems? What advantages does a normal costing systems offer? 2-Why is it necessary for a company to specify a relevant range of activity when making assumptions about cost behavior? 3- Why is it

    asked by Josephine
  75. fin 200

    Healthy food, sell 50-pound bags of grapes to the military for $10.00 a bag. The fixed cost of this operation are $80,000, while the variable cost of the grapes are $.10 per pound. what is the degree of operating leverage at 20,000 and 25,000 bags?

    asked by Mary
  76. Grade 8 math urgent

    The question is : Jason took 3/8 of his savings on a shopping trip. He used 1/4 of the money to buy a new coat. What fraction of his savings did he spend on the coat? My answer is 3/28. Am I correct?

    asked by Jessica
  77. spanish

    Si ___ el n?ero de mi jefe, le __ para decirle que no puedo ir al trabajo hoy. a)sabr?, llamara b)llamar?, supiera c)supiera, llamar? d)llamara, sabr? __ a la fiesta si __ encontrar un vestido a)apropiado para llevar. b)Viniera, podr? c)Vendr?, pudiera

    asked by michelle
  78. Physics

    I keep on getting the wrong answer I don't know if there is even static friciton in this problem in the begining before the rope snaps or not and if so if it must be equal to the Mu they give because there is only one but you can't have the same values for

    asked by Physics
  79. math


    asked by jhmeeka
  80. Physics

    I keep on getting the wrong answer I don't know if there is even static friciton in this problem in the begining before the rope snaps or not and if so if it must be equal to the Mu they give because there is only one but you can't have the same values for

    asked by Physics
  81. math

    what is the answer to (5-(3-4)*(2)*(7-8

    asked by Amber
  82. math

    how do I perform the indicated operation 20-(-5) ________ 20-(-|-5|)

    asked by Amber
  83. french

    student A: Est-ce que tu pouvois sortis avec tes amis ce soir? student B: No, je n'ai pas sortir aves mes amis ce soir.

    asked by Anna
  84. Grade 8 Geography

    For my assignment it says to flip through National Geographic Magazines and find examples of remarkable physical or cultural geography. So what am I looking for? (What is physical and cultural geography?)

    asked by Jessica
  85. health topics

    i need help with a interesting topic about obesity in america i want it to be unique and different that catches your attention i can't think of any at the moment

    asked by kate
  86. Environmental science

    What is a terrestial mitigation?

    asked by linda
  87. Another Data Management Question

    Rain is an amazing singer, but cannot play any instruments. He desperately wants a rock band that has a drummer, a guitarist, a bass player, and himself on vocals. He decides to post an ad at the local coffee house for open auditions for his band - The

    asked by rock johnny
  88. algebra


    asked by Anonymous
  89. 8th grade


    asked by diana
  90. chemistry

    aluminium + oxygen - aluminium oxide

    asked by Jonthan
  91. Division with integer answers using divisors 9&50

    266 / 38

    asked by Jake
  92. English (Urgent)

    How many Native Americans are here inn the world now? I did a google search, but I can't find my answer still, so can anyone please help me out wih this question? Thanks.

    asked by Anonymous
  93. geography

    If it is Thursday at 11pm in Singapore, what day and time is it in Tokyo?

    asked by carly
  94. Math

    Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint:(0,0); Midpoint:(2,-8). My answer is:(4,-16). Is this correct? Thanks.

    asked by B.B.
  95. English

    How does Arthur Miller manage to create tension in Act Two of ''A View From The Bridge''? d how does act two reflect all the main themes in the play? I'm terrible at writing essays and I really need help! i'm not asking you to write it for me, just a

    asked by Bex
  96. chemistry.

    What is the empirical formula of a hydrocarbon that contains 89,94 by mass?

    asked by peter
  97. geography

    what is physical and human geography?

    asked by oli
  98. math

    which is the better buy 5lb of sugar for $4.75 or 20lb of sugar for $19.92

    asked by dee
  99. art

    hey what do you guys think of when you hear "anything you can do" and "life was in the oceans 200m years before land" i need to brainstorm these to phrases thankyouu

    asked by anonymous
  100. 6th math

    4 test grades 93, 86, 92, 80 5 test average 94 what are steps?

    asked by melissa
  101. History

    I need to do a poster about daily life in ancient Rome, im looking for some good illustrations to give me ideas. Can you help?

    asked by Lewis
  102. Algbrea

    (0,2) m= 4/5

    asked by Anna
  103. Math

    Hi, I wanted to know how can I donwload "B2K - Badaboom (featuring Fabolous)/Take It To The Floor" file from your site. Where do I click? Thanks.

    asked by Peter
  104. Number Theory

    What characteristic do the numbers 8, 10, 15, 26, and 33 have that the numbers 5, 9, 16, 18, and 24 don’t have? (Hint: List the factors of the numbers.) Give two more numbers that have this characteristic.

    asked by Carol
  105. Economics

    Who can and who can't vote in the FOMC?

    asked by Andy
  106. Economics

    What rate does the FOMC set? Is the the Federal Funds Rate or the Discount Rate?

    asked by Andy
  107. Physics

    Describe the mechanism that make rifles recoiless.

    asked by Anonymous
  108. 7th grade

    a[n] ? is an ansewer to a scientific question

    asked by evelyn
  109. another computer question

    its instructions arent clear and it dosent answer my question properly

    asked by Nathan
  110. Socials*

    why was the Charles I, the king forced to recall Parlament? My answer is Because he needed money

    asked by sara
  111. Geography (grade 8)

    In my atlas, it lists Caspian Sea as a lake. I'm confused

    asked by Jessica