Questions Asked on
February 23, 2014

  1. math

    convert 20 pounds to kilograms then round to the nearest tenth

    asked by Lisa
  2. bus-math

    Oakwood Plowing company purchased two new plows. In 170 days they must make a payment of $24,330.00 to pay for them. As of today they have $23,600 what rate of interest will be needed.

    asked by help please
  3. Math

    What will be the total deduction for social security and Medicare taxes on Rony's next semimonthly paycheck of $3,960, if she has already earned $42,560 this year? (Social security tax is 6.2% of gross wages up to $106,800. Medicare tax is 1.45% of all

    asked by anoymous
  4. Probability

    Alice plays the following game with Bob. First, Alice randomly chooses a set of 4 cards out of a 52-card deck, memorizes them, and places them back into the deck. (Any set of 4 cards is equally likely.) Then, Bob randomly chooses 8 cards out of the same

    asked by qwerty
  5. Probability

    A player is randomly dealt a sequence of 13 cards from a standard 52-card deck. All sequences of 13 cards are equally likely. In an equivalent model, the cards are chosen and dealt one at a time. When choosing a card, the dealer is equally likely to pick

    asked by qwerty
  6. Probability

    A group of 90 students is to be split at random into 3 classes of equal size. All partitions are equally likely. Joe and Jane are members of the 90-student group. Find the probability that Joe and Jane end up in the same class.

    asked by qwerty
  7. Probability

    The newest invention is a three-sided die. On any roll of this die, the result is 1 with probability 1/2, 2 with probability 1/4, and 3 with probability 1/4. Consider a sequence of six independent rolls of this die. 1. Find the probability that exactly two

    asked by qwerty
  8. Math

    Can someone please explain to me exactly what type of math this is (e.g. radicals, linear equations) and how I would go about solving this?

    asked by Anonymous
  9. Probability

    You are given the set of letters ( A, B, C, D, E ). What is the probability that in a random five-letter string (in which each letter appears exactly once, and with all such strings equally likely) the letters A and B are next to each other?

    asked by qwerty
  10. Statistics

    Summarize the steps involved in analyzing the results of a one-sample experiment.

    asked by jamie
  11. Physics

    A bullet of mass kg moving at 500 m⁄s embeds itself in a large, fixed piece of wood and travels 6 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet.

    asked by Chrxeyshthoufov
  12. Physics

    A 5.1–kg block is pulled along a frictionless floor by a cord that exerts a force P = 12 N at an angle θ = 25° above the horizontal, as shown below. (a) What is the acceleration of the block? (b) The force P is slowly increased. What is the value of P

    asked by Chrxeyshthoufov
  13. Physics

    A 5 kg block is placed on top of a 10 kg block as shown above. A horizontal force of 45 N is applied to the 10 kg block, while the 5 kg block is tied to the wall. The coefficient of kinetic friction between the moving surfaces is 0.20. Determine (a) the

    asked by Chrxeyshthoufov
  14. Physics

    A 4.8‒kg block on a 39° inclined plane is acted on by a horizontal force of 46 N as shown below. The coefficient of kinetic friction between the block and the plane is 0.33. (a) What is the acceleration of the block if it is moving up the plane? (b)

    asked by Chrxeyshthoufov
  15. Physics

    The horizontal force F, shown in the figure above, accelerates the 4‒kg block at 1 m/s2 to the right. Assume that the coefficient of kinetic friction is 0.5 for both blocks. Given that the 5‒kg block moves up the slope, find (a) the magnitude of the

    asked by Chrxeyshthoufov
  16. Physics

    An exceptional standing jump would raise a person 0.80 m off the ground. To do this, the person must first lower himself about 0.20 m prior to jumping. What force must a 70‒kg person, ready to jump at this position, exert against the ground in order to

    asked by Chrxeyshthoufov
  17. Physics

    An airplane is flying in a horizontal circle at a speed of 482 km⁄h. The wings of the plane are tilted at 38.2° with respect to the horizontal as shown in the figure below. Find the radius of the circle in which the plane is flying. Assume that the

    asked by Chrxeyshthoufov
  18. Physics

    A governor (centrifugal pendulum) consists of two 200–g spheres attached by light, rigid 10.0–cm rods to a vertical rotating axle. The rods are hinged so that the spheres swing out from the axle as they rotate with it. However, when the angle θ is

    asked by Chrxeyshthoufov
  19. Physics

    A 1.34‒kg ball is attached to a rigid vertical rod by means of two massless strings each 1.70 m long. The strings are attached to the rod at points 1.70 m apart. The system is rotating about the axis of the rod, both strings being taut and forming an

    asked by Chrxeyshthoufov
  20. Physics

    A banked circular highway curve is designed for traffic moving at 90 km/h. The radius of the curve is 70 m. If the coefficient of static friction is 0.30 (wet pavement), at what range of minimum and maximum speeds can a car safely make the curve?

    asked by Chrxeyshthoufov
  21. chemistry

    A gas with a volume of 6.65 L at a pressure of 1.22 atm is allowed to expand until the volume raises to 54 L. What is the new pressure (in atm)?

    asked by david
  22. Chemistry

    In this experiment absorption spectroscopy is conducted to detect Cr(VI)in aqueous solutions and with it the concentration of Cr(VI). How would each of the following affect the Cr(VI) concentration determined in this experiment? Explain the answer. 1. A

    asked by Sandy
  23. add maths

    f(x)=3x^2-12x+20 Find minimum value and value of x

    asked by mandy
  24. Chemistry

    A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)

    asked by Roro
  25. chemistry

    VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer

    asked by Lisa
  26. chemistry

    what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer

    asked by Lisa
  27. Chemistry

    which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer

    asked by Lisa
  28. chemistry

    Electronegativity is a concept that is useful along with other concepts in predicting the polarity of a bond deciding how many electrons are involved in a bond formulating a statement of the octet rule determining the charge on a polyatomic ion

    asked by Lisa
  29. chemistry

    given the following electronegativities Na=0.9, H=2.1, Cl=3.0 which of the following statements is true? H2,Cl2, and HCl are polar covalent molecules NaCl is a polar covalent compound and HCl is an ionic compound HCl is a nonpolar covalent compound and Cl2

    asked by Dee Dee
  30. chemistry

    which of the following diatomic molecules contains the bond of greatest polarity? N2 Cl2 ClI BrF please explain why having a real hard time comprehending this stuff thanks

    asked by Dee Dee
  31. physical since,pure maths,life science

    wt cn i become? except all de engineering thngs?plz help

    asked by masaka cindy
  32. chemistry

    which of the following linear molecules is a nonpolar molecule containing polar bonds? H-C=N between C and N are three lines O=C=O H-Cl N=N between N and N are three lines Please explain... I am having a hard time comprephening this stuff. Thanks

    asked by Dee Dee
  33. chemistry

    Which of the following is a molecular compound that contains five atoms per molecule? germanium tetrabromide dinitrogen monoxide dinitrogen pentoxide nitrogen diselenide please explain. I am having a very hard time comprehending this stuff thanks

    asked by Dee Dee
  34. chemistry

    the correct name for the compound H2Te is hydrogen telluride dihydrogen telluride dihydrogen monotelluide hydrogen monotelluride please explain why. I am having a very hard time comprehending this stuff. Thanks

    asked by Dee Dee
  35. L.o

    warn teenagers on the ways social media might change their relationships and behaviour, suggest strategies they can use to benefit from socia media

    asked by masaka cindy
  36. chemistry

    Which of the following statements concerning differences between ionic and molecular compounds is correct? Molecular compounds contains two elements, and ionic compounds contain three of more elements ionic compounds contain oxygen, and molecular compounds

    asked by Johnny
  37. chemistry

    in which of the following pairs of compounds are both members of the pair molecular compounds? PCl3 and LiBr CCl4 and KOH NaH and CaF2 more than one correct response no correct response if more than one response please show all the correct answers thanks

    asked by Johnny
  38. chemistry

    Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank

    asked by Johnny
  39. chemistry

    the number of nonbonding electrons exceeds the number of bonding electrons in the Lewis structure of which of the following molecules? HCN NH3 H2O more than one correct response no correct response if more than one correct response please show all correct

    asked by Johnny
  40. physics

    An canon ball is launched from ground level directly upward at 39.2 m/s. For how long is the canon ball at or above a height of 34.3 meters?

    asked by Anonymous
  41. chemistry

    In which of the following triatomic molecules or ions are both of the bonds multiple bonds? HCN CO2 NO2 more than one correct response no correct response If more than one correct response then please show all the correct answers. thanks

    asked by Johnny
  42. L.0

    warnings and benefits of teenagers frm social media

    asked by masaka cindy
  43. math

    100=1.5(1.1^n - 1)/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5(1.1^n - 1)/1.1-1 10 = 1.5(1.1^n - 1) 10 = 1.65^n - 0.5) log 10.5 = n log 1.65 n =

    asked by Lucas
  44. English

    Are Lincoln and Kennedy inaugural addresses relevant today?

    asked by Nica
  45. Chemistry

    A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)

    asked by Roro
  46. math

    100=1.5((1.1^(n) - 1))/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5((1.1^(n) - 1))/1.1-1 10 = 1.5(1.1^(n) - 1) 10 = 1.65^n - 0.5) log 10.5 = n

    asked by Lucas
  47. algebra

    Name the property of real numbers illustrated by the equation 2·(8·7)=(2·8)·7 answers are. Distributive property ,associative property multiplication, Communicative property multiplication, Associative property addition

    asked by maddy
  48. ela

    in chapter 9 site specific examples ex: ms.maudie is thoughtful of other "only thing i worried about...was all the danger and commotion it caused... this whole neighborhood could have gone up." i did all of them except these please help atticus tie racism

    asked by anonymous
  49. English

    Choose the contraction in parentheses ( ) that correctly completes the sentence . 1/ She (don't, doesn't) know what to expect in the United States . Answer: doesn't 2/ Fortunatley, her aunt and uncle ( haven't, didn't) forgotten to meet her plane. Answer:

    asked by NAwaf
  50. algebra

    Solve the compound inequality-2

    asked by maddy
  51. algebra

    Show all steps, combine like terms what is a simple form of the expression-3(-4y+3)+7y

    asked by maddy
  52. Physics

    A man driving his car into 20.0 ft garage with a velocity of 20.0mi/h applies the brakes, producing a constant deceleration. Find the smallest deceleration necessary to avoid striking the back wall of the garage. And find how many seconds it takes for the

    asked by Jish
  53. math

    3 1/2% of 200

    asked by Angela
  54. foreign language

    Mean of tute¨¤uaewr ibeifslh

    asked by vandana
  55. home economics

    Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the

    asked by Anonymous
  56. sphy011

    an egg is thrown directly upward so that it remains in the air for 10 seconds.what is the initial velocity of the egg?

    asked by amukelani
  57. Life Orientation

    what according to the basic conditions of employment Act applies with regard to the contraventions?

    asked by Desiree
  58. math

    a new 5 mile nature trail is 125% of the length of the original trail.How long is the original trail?

    asked by Angela
  59. Chemistry - check answers

    Can someone please check my answers and make sure they're correct? A) How much heat would it take to raise the temperature of 46.0 g of water from 90.0 to 100.0 C? Answer using correct sig figs, sign, and units. My answer: +1.92x10^3 J B) How many joules

    asked by Amanda
  60. Mat/116

    An experiment is underway to test the effect of extreme temperatures on a newly developed liquid. Two hours into the experiment the temperature of the liquid measured to be -17 degrees celsius. After eight hours of the experiment the temperature of the

    asked by Carla
  61. chem

    The bond length of RbF is 284.00 pm. What would be the dipole moment, in D, of this compound by assuming a completely ionic bond? Remember e = 1.60x10-19 C; 1 D = 3.34x10-30 C*m

    asked by sara
  62. Chemistry

    A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)

    asked by Roro
  63. Mat/116

    Which set of points are one the line y = 2x - 3

    asked by Carla
  64. algebra

    Which algebraic expression models the given word phase 40fewer than a number answers are -40+, T+40, 40-T, T-40

    asked by snow
  65. Literature/English Questions

    Please, I am struggling with these. Can someone help me by answering them? Or at least assisting me to? Thank you in advance to anyone who are able to. These questions regard the short-story "The Secret Life of Walter Mitty." Describe each character's

    asked by Anonymous
  66. msth

    Professor White asked his students to put the number of hours each studied for the final exam on a piece of paper and turn that paper in with the exam. The pieces of paper indicate that students studied 10, 3, 4, 25, 1, 4, 4, 12, 6, 8, and 10 hours. What

    asked by Anonymous
  67. Physics

    A canoe has a velocity of 0.480m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity (V(C/R)) of the canoe relative to the river. Also, find the direction of

    asked by Rebecca
  68. U.S History - need help to check my answer!!!

    Document B: Every miserable fool who has nothing at all of which he can be proud, adopts as a last resource pride in the nation to which he belongs; he is ready and happy to defend all its faults and follies tooth and nail, thus reimbursing himself for his

    asked by Cassidy
  69. chemistry

    CaO has a face-centered cubic unit cell in which the O2- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density if the ionic radii of Ca2+, O2- ions are 57.63 pm and 184.0 pm, respectively?

    asked by hershi
  70. math

    A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second

    asked by nisrin
  71. algebra

    Solve the equation-5y-9=(y-1) answers are-1/2, -21/2, -2, -2/4 thanks

    asked by snow
  72. math

    In the addition problem find the digit represented by C. Each time a letter appears it represent the same digit. A does not equal 0 (zero). AB AB AB + AB ______ CA please explain your results Thanks

    asked by nisrin
  73. physics

    Explain in terms of the conservation of momentum why the ratio of the masses of a bullet and a gun must be carefully considered

    asked by karabo
  74. algebra

    Is the following always never sometimes true 14+3 x-7=7x+7-4 x thanks

    asked by snow
  75. algebra

    Is the inequality sometimes always never true-2(2x+9)>-4 x 9

    asked by snow
  76. calculus

    Solve for x: r(x)=ln (x+2/x-1)

    asked by Anonymous
  77. physics

    You are given a 1kg trolley of unknown mass. Explain how the mass of the unknown trolley can be determined if a mass meter scale is not available

    asked by karabo
  78. algebra

    Show all steps evaluate the expression for the given value of the variable 5 a+5b,a=-6,b=-5

    asked by Lucky
  79. algebra

    Solve the equation-5y-9=(y-1) answers are-1/2, -21/2, -2, ,2/4

    asked by Lucky
  80. ENG1511

    paraphrase the sentence, ''To cut a long story short, one day i decided to be a man about my feelings.''

    asked by Euneth
  81. Calc Help :(((((

    Solve it step by step so I can't do the rest. lim x->-infinity (ax^2+b)/(cx+d) Thank you!

    asked by Kris
  82. IT

    Write a program that asks for the name of the employee, an hourly pay rate and hours worked. Compute gross pay (hours X rate), withholding tax, and net pay (gross pay minus withholding tax). Withholding tax is computed as a percentage of gross pay based on

    asked by ryan
  83. Literature/English Questions

    Read each of the following passages of descriptions of events from the play. Identify which type of irony is used in each passage or description. Then briefly explain the contrast of contradiction that occurs in each passage. 1. TRAVELER: So, what do you

    asked by Anonymous
  84. Ms. Sue

    Can you evaluate my answers in my previous "English/Literature Questions" post? Thank you.

    asked by Anonymous
  85. a

    A rectangle is 3times as long as it is wide the perimeter is 60cm. Find the dimensions of the rectangle round to nearest tenth if necessary answers are 7.5cm.by22.5cm., 7.5cm.by52.5cm., 20cm.by60cm., 15cm.by22.5cm thanks

    asked by Lucky
  86. U.S History - need help to check my answer!!!

    Document D: If slavery be wrong, it is justified by the example of all the world. He cited the case of Greece, Rome and other ancient states; the sanction given by France, England, Holland, and other modern states. In all ages, one half of mankind have

    asked by Cassidy
  87. HELP

    In the addition problem find the digit represented by C. Each time a letter appears it represent the same digit. A does not equal 0 (zero). AB AB AB + AB ______ CA please explain your results Thanks

    asked by nisrin
  88. HELPPPP

    A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second

    asked by nisrin
  89. math

    A patient is not allowed to have more than 300 milligrams of cholesterol per day from a diet of eggs and meat. Each egg provides 150 milligrams of cholesterol. Each ounce of meat provides 100 milligrams of cholesterol.

    asked by Anonymous
  90. Math Systematric Trial

    Hey everybody, I really need help solving these math equations. Thank YOU! For helping me! Use Systematic trial to find the value of each variable. a) 5+7c=89 b) 26=5+3e c) 8k-16=200 d)525-6u=339 Write each sentence as an equation. Solve each equation. a)

    asked by Harmony Ann
  91. Engl1511

    Look up all the dictionary entries of the following words and write down the one that is mostly contectually relavant to the text Tenant Intrigue Audacity Oblivious

    asked by Costance
  92. calculus

    Find the equation of the tangent line to the ellipse x 2 + 4y 2 = 25 when x = 3 and y < 0. Answer 3x - 8y = 7 3x - 8y = 25 3x + 8y = 7 3x + 8y = 25

    asked by shira
  93. calculus

    Describe the slope of the tangent line to the curve defined by x 2 + xy - y 2 = 5 when x = 2. positive negative zero undefined

    asked by shira
  94. college math

    Acrosonic manufactures a model G loudspeaker system in Plants I and II. The output at Plant I is at most 800/month, and the output at Plant II is at most 600/month. Model G loudspeaker systems are also shipped to the three warehouses—A, B, and C—whose

    asked by Dee
  95. college math

    CalJuice Company has decided to introduce three fruit juices made from blending two or more concentrates. These juices will be packaged in 2-qt (64-oz) cartons. One carton of pineapple-orange juice requires 8 oz each of pineapple and orange juice

    asked by Dee
  96. Spanish

    Fill in the blanks with questions based on the cues. Remember to use correct capitalization and punctuation. can someone please check my homework 1. ¿? / no / estudiar / tú / en la biblioteca / hoy / por qué A. ¿ Por qué tú no estudiar hoy en la

    asked by Amy
  97. college chemistry

    A certain metal crystallizes in a face-centered cubic arrangement and has a density of a density and atomic radius of 12.41 g/cm3 and 134.5 pm, respectively. Which element below is it?

    asked by hershi
  98. Physics

    A light string can support a stationary hanging load of 26.4 kg before breaking. An object of mass m = 3.19 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.795 m, and the other end of the string is held

    asked by Joe
  99. calculus

    Find the slope of the tangent line to the graph y = x-3 at the point (0.5, 8). Answer -48 -12 4 16

    asked by shira
  100. Chemistry

    How do I calculate moles from the given litres and mass of the substance (in grams)?

    asked by Anonymous
  101. Grammar

    Those that were in need of help were lucky to have Christian to assist them. I know the dependent clause is that were in need of help I think the clause is a noun clause Is that correct?

    asked by Dakota
  102. Chemistry

    How do I calculate moles from the given litres and mass of the substance (in grams)?

    asked by Anonymous
  103. 8th grade science

    How many (total) of each atom are there in the reactants and the products of cellular respiration? PLEASE HELP ME

    asked by Shawn
  104. accounting

    Cash flow information: Direct and indirect methods The comparative year-end balance sheets of Sign Graphics, Inc., revealed the following activity in the company's current accounts:

    asked by mary
  105. Calc Help :(((((

    Solve it step by step so I can't do the rest. lim x->-infinity (ax^2+b)/(cx+d) Thank you! Answer th

    asked by Kris
  106. Spanish

    write four different questions in spanish for the following sentence. 1. La profesora Gutierrez ensena contabilidad. 2. Ustedes necesitan hablar con el profesor de economia. 3. carlos busca el libro de arte. 4. Mariana canta en el coro de la universidad.

    asked by Amy
  107. math

    Suppose 4y + xy = 2. Evaluate d^2y/dx^2 at the point (-3, 2).

    asked by cristiana
  108. physics

    A baseball has a mass of about 0.14 kg, and it is pitched towards home plate at a speed of about 46 m/s. If the bat exerts an average force of 9500 N for 1.7 ms, what is the final speed of the ball in m/s?

    asked by Jacob Szczepanski
  109. Computer science

    Take two inputs from user: N - #items B - budget. There are S items, each with some price value, out of which user needs to select N items in such a way that total bill does not exceed B. The program should print all such combination of N products.

    asked by Joshua
  110. math

    Ship A, 15 miles of 0 is moving west at 20 mile per hour, ship B, 60 miles south of 0 is moving north at 15 mile per hour. are they approaching or separating after 1 hr and at what rate? are they approaching or separating after 3 hrs? when are they nearest

    asked by rhavenrock
  111. help me with this language arts.

    Multiple Choice Vocabulary 1. Another word for buoyed is (1 point) tired. bothered. lifted. 2. If someone is an optimist, he is generally (1 point) happy. distant. outgoing. disappointed. 3. Something that is nutritious is (1 point) hard to find. good for

    asked by josh
  112. Chem

    Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction

    asked by Anonymous
  113. math

    18st^5/12st^3

    asked by staci
  114. Personal Finance

    1. You hold 20 shares of stock worth $12.75 per share on June 1. Over the next 12 months you receive total dividends of $.055 per share. On June 1 of the following year, each share is worth $12.95. a. Dividend return: -- b. Appreciation/Deprecation: -- c.

    asked by Anonymous
  115. Chemistry

    aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g H2SO4 completly reacted with aluminum

    asked by Marcus
  116. math

    The next number in the series 2, 5, 11, 20, 32, 47, is:

    asked by Anonymous
  117. math

    the ratio of width to length of a television scree in 3:4. What is the width of the screen if the length is 32 inches

    asked by Thomas
  118. U.S History - Pls check my answer :)

    Document A: It is impossible that the allied powers should extend their political system to any portion of either continent without endangering our peace and happiness; nor can anyone believe that our southern brethren, if left to themselves, would adopt

    asked by Cassidy
  119. Physics -- check answers

    1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational

    asked by Lisa
  120. Spanish

    I am not taking a Spanish class, but I am reading a story with Spanish words in it. There is only one word and one two word phrase. The following are those. 1. abuelito 2. Está muerto Please help me with the following, I do not know what they mean. Also,

    asked by Brady
  121. trig

    Use a calculator to find: θ if θ = csc-1 1.7516. θ = _____°. Round to three decimal places.

    asked by skye
  122. Science

    Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide

    asked by Harry
  123. Science

    Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide

    asked by Harry
  124. math

    20%is less than 32

    asked by sara
  125. Math

    If I had two turtles that are 45cm long and they need water how big will my cage be and the water must be 56 inches long?

    asked by Asna
  126. Math

    If I had two turtles that are 45cm long and they need water how big will my cage be and the water must be 56 inches long?

    asked by Asma
  127. Accounting

    An example of a committed fixed cost would be: a) taxes on real estate b) management development programs c) public relations d) advertising programs

    asked by Morgan
  128. accounting

    Richard Hamilton has a fast - food franchise and must pay a franchise fee of $35000 plus 3% of gross sales. In terms of cost behavior, the total cost is a: a) variable cost b) fixed cost c) step - fixed cost d) mixed cost

    asked by Morgan
  129. Ethics

    Which philosopher argued that women are defective males? Answer a. Thales of Miletus. b. Plato. c. Socrates. d. Aristotle.

    asked by Angel
  130. world history

    what were some similarities in the responses of the Chinese and Japanese to European invasion in the 19th century?

    asked by Anonymous
  131. ethics please help

    Which of the following is associated with the Heinz dilemma? a. Lawrence Kohlberg. b. Jean Rousseau. c. Immanuel Kant. d. None of the above.

    asked by Angel
  132. physics

    how far does a wave travel in one period?

    asked by lisa
  133. social studies

    In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change?  (5 points) The Gold Rush The Mexican-American War The Monroe Doctrine The

    asked by Christian
  134. Chemistry

    Ik this has been answered, but doesn't the copper oxide have something to do with it? And could you explain it in simpler terms? I'm just confused because you said forget the copper oxide, but your using it somehow, what puzzles me is the carbon dioxide,

    asked by Harry
  135. Math

    a rope swing is attached to tree overlooking the river. if the rope is 38 feet in length and swings through an angle of 200 degree, find the total distance to the nearest feet, traveled by someone sitting on the seat when the swing angle described is the

    asked by Ananya
  136. mat/116

    need an expression only to this word problem: An experiment is underway to test the extreme effect of a newly developed liquid. Two hours into the experiment the temperature if the liquid measured to be -17 degrees Celsius. After eight hours of h

    asked by csrla
  137. chemistry

    A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?

    asked by john
  138. math class

    Find the slope of the tangent line to the graph y = x^-3 at the point (0.5, 8). -48 -12 4 16

    asked by liana
  139. Physics -- check answers please

    1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational

    asked by Lisa
  140. Math

    The diameter is 6 2/5 ft. What is the area

    asked by Shawn
  141. physics

    10. A large stone block has been loaded in the bed of a dump truck. The bed is slowly raised until it makes an angle of 30 degrees with the horizontal; at this point, the block starts to slide downward. What is the coefficient of static friction between

    asked by Rylan
  142. Chemistry

    If you use the lmax during the calibration plot (Beer's plot) and then change to some other wavelength for the measurement of the sample, how will this affect x?

    asked by Kelsey
  143. Chemistry

    If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x?

    asked by Kelsey
  144. Chemistry

    How many grams of AL(NO3)3 are produced when 23.5 grams of Aluminum react with 133 mL of 6.5M HCL?

    asked by Katie
  145. Physics

    4. A force of 48 N is required to start a 7.8 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? = (b) Does the coefficent of friction have a unit? A. No, it is a ratio B. No, the

    asked by Rian
  146. chemistry

    If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31 g of isopentyl alcohol(C5H12O) to give 2.96 g of isopentyl acetate(C7H14O2), what is the percent yield of the reaction?

    asked by robert
  147. PHYSICS

    5. What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.24? acceleration max=

    asked by sean
  148. Math

    What is the zero of the function x^2-18x-4

    asked by Shun
  149. PHYSICS

    6. Drag-race tires in contact with an asphalt surface have a very high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s,

    asked by SHAWN
  150. chemistry

    If 16.0 mL of 8.5 ✕ 10-2 M HClO4 is added to 22.0 mL of 7.6 ✕ 10-4 M KOH, what is the pH of the solution?

    asked by Elizabeth
  151. PHYSICS

    A 7 kg purse is dropped from the top of the Leaning Tower of Pisa and falls 53 m before reaching the ground with a speed of 17 m/s. What was the average force of air resistance? F =

    asked by shanna
  152. calculus

    h(t) = -1/3t^3 + 4t^2 + 20t +2, f or >- 2

    asked by Bo
  153. Chem- Bronsted bases

    Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.) H2O NH3 H2 CH3NH2 O2 PH41+ CO32-

    asked by Elizabeth
  154. math class

    If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3. y = 4x - 3 y = 4x + 21 y = 9x - 23 y = 9x + 31

    asked by liana
  155. Chemistry--acids

    Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.) NH41+ H2 O2 C4H10 H2CO3 H2SO4 H3O1+

    asked by Julie
  156. PHYSICS

    A block with a mass of 126 kg is pulled with a horizontal force of F applied across a rough floor. The coefficent of friction between the floor and the block is 0.7. If the block is moving at a constant velocity, what is the magnitude of F applied? F

    asked by cris
  157. chemistryyyy

    a. What is the pH of a 6.1 ✕ 10-5 M Ca(OH)2 solution? b. What is the H3O+ concentration of the solution? I just cant figure out the ionic equation.

    asked by Ana
  158. College Chemistry

    If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x? x is the mols of waters of hydration

    asked by Maggie
  159. Chemistry

    If you use the lmax during the calibration plot (Beer's plot) and then change to some other wavelength for the measurement of the sample, how will this affect x? x is the moles of H20 in the equation

    asked by Kelsey
  160. PHYSICS

    A -kg block is initially at rest on a frictionless horizontal surface. It is pulled with a constant horizontal force N. How long must it be pulled before its speed is m/s? t pull =

    asked by cristy
  161. PHYSICS

    A large stone block has been loaded in the bed of a dump truck. The bed is slowly raised until it makes an angle of 30 degrees with the horizontal; at this point, the block starts to slide downward. What is the coefficient of static friction between the

    asked by chris
  162. math

    i don't understand what they are asking me to do when they give me a quhat looks like this (write acute,right,or obtuse for each angle 1.AFD 2.BFD and thers a bunch of line that intersect off to the side

    asked by olivia
  163. chemistry

    A 500. mL sample of hydrogen gas is collected over water at 27 °C. The pressure of the hydrogen and water vapor mixture is 78.5 kPa and the vapor pressure of water at 27 °C is 3.6 kPa. What is the partial pressure of the dry hydrogen gas?

    asked by Gabby
  164. Language art

    Though mAny people doubted that the new program would do any real good, it was a very wholesome development

    asked by Anonymous
  165. Chemistry

    The half-life for the first-order conversion of A to B is 56.5 hours. How long does it take for the concentration of A to decrease to 10.0% of its original amount? Our professor has given us the answer - 188hr but I am not entirely sure how he got it.

    asked by Kristen
  166. Chemistry

    how do I calculate theoretical yield?

    asked by Anonymous
  167. Geography

    Where is Zhengzhou China located? Is it a urban city in the middle of China?

    asked by Blaze
  168. math

    Write 14,060,000,000,000 in scientific notation

    asked by Gio
  169. Math

    An architect has allocated a rectangular space of 589ft^2 for a square dining room and a 12ft wide kitchen. Find both the width of the square dining room and the length of the entire rectangular space. The width of the square dining room is _____ft The

    asked by Pam
  170. Precalculus

    Please!! I know I posted this already but there is a typo. There are 49 mice in a pet shop. 30 mice are white. 27 mice are male. 18 mice have short tails. 8 mice are white and have short tails. 11 mice are male and have short tails. 7 mice are male but

    asked by Anonymous
  171. Math

    A particle is moving along the curve y = 4x^2 + 1 in such a way that the y coordinate is increasing at a rate of ½ units per second. At what rate is the x coordinate changing at the instant x = 2?

    asked by Carlos
  172. physics

    you and your friend are riding on a helicopter that is traveling west at a speed of 10 meters per second. You throw a baseball with a velocity of 2 meters per second north, straight across the inside of the helicopter to your friend on the other side. What

    asked by rafael
  173. physics

    A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of 6.0 m/s to catch the

    asked by Louis
  174. physics 1

    A speed skater goes around a turn that has a radius of 35 m. The skater has a speed of 14 m/s and experiences a centripetal force of 460 N. What is the mass of the skater?

    asked by Anonymous
  175. Chemistry

    Given these standard reduction potentials at 25 C 1. Cr3+ + e- ===> Cr2+ E1=-0.407 V 2. Cr2+ + 2e- ===> Cr(s) E2=-0.913 V determine the standard reduction potential at 25C for the half-reaction equation Cr3+ + 3e- ===> Cr(s) E=? When I tried, I got 1.08V

    asked by Bridget
  176. chemistry

    My teacher went over it really fast and now I'm just really confused about how to do my homework =( Calculate the cell potential for the following reaction as written at 25C, given that [Cr2+] = 0.821 M and [Ni2+] = 0.0190 M. Cr(s) + Ni2+ (aq) Cr2+ (aq) +

    asked by Bridget
  177. Chemistry

    The cell diagram for the lead-acid cell that is used in automobile and truck batteries is Pb(s) l PbSO4 (s) l H2SO4 (aq) l PbO2(s), PbSO4(s) l Pb (s) where the comma between PbO2 (s) and PbSO4 (s) denotes a heterogeneous mixture of the two solids and the

    asked by Bridget
  178. maths

    the line passes through the points s(6,6) and T(0,-2) determine the gradient of the line the equation of the line the midpoint of the line segment,TS the length of the line segment,TS

    asked by shanise
  179. business finance

    You have saved $15,000 for down payment on a car costing $55,000, and plan to finance the rest with a 5-year loan. The dealer is offering you a loan with a monthly payment of $1,050. What effective annual rate of interest is the dealer charging on the loan

    asked by sakiss
  180. Math

    The number of tickets sold each day for an up coming performance of Handel,s Messiah is given by N(x)=-0.4x^2+8x+11, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold

    asked by Pam
  181. physics

    A 3.3 kg ball strikes a wall with a velocity of 8.4 m/s to the left. The ball bounces off with a velocity of 6.8 m/s to the right. If the ball is in contact with the wall for 0.27 s, what is the constant force exerted on the ball by the wall? Answer in

    asked by michael
  182. physics

    A penny is placed at the outer edge of a disk (radius = 0.119 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.70 s. Find the minimum coefficient of friction necessary to allow the penny to

    asked by Anonymous
  183. Math

    Find the total profit, the maximum value of the total profit, and the value of x at which it occurs when the revenue is given by R(x)=240x-x^2 and the cost is given by C(x)=5000+8x.

    asked by Pam
  184. Chemistry

    A gas at 54◦C occupies 4.54 L. At what tem- perature will the volume be 3.04 L, assuming the same pressure?

    asked by john
  185. Gen.Chem2

    what mass(g) of NH3 must be dissolved in 475g of methanol to make a 0.25m solution

    asked by Anonymous
  186. Social Gerontology

    I need an outline for the political embattlement for the aged (exp.,medicaid, medicare, disability, welfare, supplemental security income. Can you help me?

    asked by Debbie
  187. math

    x^2-10x+y^2=k is ta circle tangent to the y-axis for what real number k?

    asked by qx
  188. statistics

    Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 |

    asked by anna
  189. Chemistry

    The activation energy of a certain reaction is 34.9kJ/mol . At 23 ∘C , the rate constant is 0.0190s−1. At what temperature in degrees Celsius would this reaction go twice as fast?

    asked by Kat
  190. math

    when y varies directly at the square of X, the variation equation is written y= kx square, where K is constitution (a) given that y=50 when x=10,find the value of K. (b) calculate the value of y when X= 30

    asked by shanise
  191. algebra

    Show all steps evaluate the expression for the given value of the variable 5a+5b,a=-6,b=-5thanks

    asked by Lucky
  192. math

    y=x^2+6x+k intersects y=-x^2-6x-k at just one point. Find k

    asked by bx
  193. statistics

    Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 |

    asked by anna
  194. chemistryyyy

    (a) What is the pH of a 6.1 ✕ 10-5 M Ca(OH)2 solution? (b) What is the H3O+ concentration of the solution? I already know the answer to part A, I just don't understand how you could use that information to find the concentration of H30+ when its not in

    asked by Ana
  195. algebra

    Solve the inequality graph the solution set 26+6b>2(3b+4) answers are. All real numbers, b11/2, no solution thanks

    asked by Lucky
  196. physics

    A woman is riding a Jet Ski at a speed of 20 m/s and notices a seawall straight ahead. The farthest she can lean the craft in order to make a turn is 20°. This situation is like that of a car on a curve that is banked at an angle of 20°. If she tries to

    asked by Anonymous
  197. physics

    A jet flying at 138 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 2.40 × 105 kg. Calculate the magnitude of the necessary lifting force.

    asked by Anonymous
  198. algebra

    Is the inequality sometimes,always,never,true -2(2x+9)>-4 x+9

    asked by tina
  199. Chemistry

    A gaseous hydrogen and carbon containing compound is decomposed and found to contain 85.63% C and 14.37% H by mass. The mass of 258 mL of the gas, measured at STP, was found to be 0.646 g.What is the molecular formula of the compound?

    asked by Simone
  200. college ch

    CaO has a face-centered cubic unit cell in which the O2- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density if the ionic radii of Ca2+, O2- ions are 57.63 pm and 184.0 pm, respectively?

    asked by hershi
  201. math

    The total mass of three identical boxes is 28.05 kilograms. What is the mass, in kilograms, of each box?

    asked by Jena
  202. Reading

    How does this passage affect you? “Lief was shown a pocketbook and lamp-shades made from human skin for Ilse Kich, wife of the commandant" So far I have: This left me in shock that someone would have the idea to skin off someone’s skin and make it into

    asked by Ian
  203. Statistics

    Fill in the blanks with the appropriate raw score, z score, t scores . Mean =50, sd = 5. Raw 35

    asked by Saf
  204. chemistry

    My motorcycle has a capacity of 4.5 gal of gasoline. If I combust all of the octane to power my motorcycle, what is the volume of CO2 generated from just my motorcycle on one tank of gas?Assume that I burn all of the gasoline into CO2 on warm day in June,

    asked by tricia
  205. history

    1. What was described as the ' hardest work " slaves did ? ( 1point ) A. work in the rice fields B . Work in the tobacco fields C. Work in the lumber business D. Work loading and unloading ships in port 2. which of the follow best describes the social

    asked by lovey
  206. Chemistry

    A 0.670 g sample of impure Al2(SO4)3 reacts with excess BaCl2. If the sample produces 0.760 g of BaSO4, what is the mass percent of Al2(SO4)3 in the sample?

    asked by Tevin
  207. Chemistry

    If 16.0 mL of 8.5 ✕ 10-2 M HClO4 is added to 22.0 mL of 7.6 ✕ 10-4 M KOH, what is the pH of the solution?

    asked by Jessibell
  208. algebra

    Solve the problem by writing an inequality in the perimeter of a rectangular picture frame must be less than 180in. and width is 26in. what must the height of the frame be

    asked by tina
  209. careers in mathematics and physical sciences

    wt can i study with maths and physical sciences and life sciences besides engeenering thngs ?please help

    asked by masaka cindy
  210. Chemistry

    Which of the following substances would be expected to be the strongest electrolyte (best conductor of electricity) in solution with H2O as the solvent? 1. HF 2. BaF2 3. PCl3 4. CH3OH

    asked by sara
  211. chemistry

    In the net ionic equation for the neutraliza- tion reaction between hydrofluoric acid (HF) and sodium hydroxide (NaOH), the HF is rep- resented as 1. the molecule, HF. 2. neither the molecule nor the separated ions since it is a spectator in the reaction.

    asked by sara
  212. 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 by jan
  213. math

    Ryan was trying to figure out how many column millimeters his advertisement would require. He wanted to sell his motorcycle as quickly as posible, so he was including a picture. If the picture was the width of a column and four centimeters long, how many

    asked by Ashton
  214. chemistry

    An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. Write the equation for the dissolution of the salt that produced this solution. If the solution contains 0.600 mol of potassium ions, how many moles of sulfite ions are

    asked by lebanon
  215. College Physics

    A very long wire carries an I1 = 7.80 A current along the x axis and another long wire carries an I2 = 5.13 A current along the y axis. (I2 is directed upward on the y axis, and I1 is directed to the right on the x axis) What is the magnetic field at point

    asked by Amanda
  216. Chemistry

    In an emission spectroscopy, when trying to identify the most intense emission line for an ion, does one have to identify it using the wavelength and the intensity?

    asked by Sandy
  217. physics

    A planet has a mass of 5.71 × 1023 kg and a radius of 3.93 × 106 m. (a) What is the acceleration due to gravity on this planet? (b) How much would a 61.8-kg person weigh on this planet?

    asked by lawrenvceshrenk
  218. AP style

    Does anyone know if north central is hyphenated AP style? my book doesn't really specify.

    asked by blaze
  219. Finance

    Find the APR, or stated rate, in each of the following cases EAR: 12.4 semianually 13.3 monthly 11.0 weekly 14.7 infintely

    asked by Jade
  220. General Chem

    If I want to prepare 5.0 liters of a 0.25 M solution of NH4Cl, how many grams of the salt should I weight out?

    asked by Krew
  221. history (Declaration)

    How do you see the ideas in the Declaration compared to typical Medieval European?

    asked by Sarah
  222. math

    Sighting the top of a building, a surveyor measured the angle of elevation to be 60°. The measurement is taken 200 feet from the building. Find the building’s height. Express your answer in terms of feet and then round to two decimal places

    asked by sean
  223. Chemistry

    Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 2.640. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10. I need to know what equations to use to find the answer not just how to get it

    asked by Sonya