Questions Asked on
April 27, 2011

  1. calculus

    The sides and diagonal of the rectangle above are strictly increasing with time. At the instant when x=4 and y=3, dx/dt=dz/dt and dy/dt=k(dz/dt). What is the value of k at that instant. solved for z with pythagorean theorem and stuck at that step. z=5

    asked by Repost
  2. CHEMISTRY HELP!

    Consider the following reactions and their equilibrium constants. (NO(g) + 0.5Br2(g) NOBr(g) Kp = 5.3 2NO(g) N2(g) + O2(g) Kp = 2.1 x 1030 Use these equations and their equilibrium constants to determine the equilibrium constant for the following reaction:

    asked by jon
  3. Chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g degrees C and 2.03 J/g degrees C, respectively, calculate the total quantity of heat evolved when 10.0 g of steam at 200 degrees C is condensed, cooled, and frozen to ice at -50 degrees

    asked by Joe Schmo
  4. Physics

    The average coefficient of volume expansion for carbon tetrachloride is 5.81 10-4 (°C)-1. If a 43.0 gal steel container is filled completely with carbon tetrachloride when the temperature is 10.0°C, how much will spill over when the temperature rises to

    asked by Jamie
  5. Business

    Identify which of the following sentences uses modifiers correctly; a) kurt and his hockey teammates nearly cooked two hundred pancakes for the breakfast fundraising event. d) Bridget decided to leave her career as an attorney and pursue acting during the

    asked by Maria
  6. chemistry

    Use the ΔH°f information provided to calculate ΔH°rxn for the following: ΔH°f (kJ/mol) SO2Cl2 (g) + 2 H2O(l) → 2 HCl(g) + H2SO4(l) ΔH°rxn = ? SO2Cl2(g) -364 H2O(l) -286 HCl(g) -92 H2SO4(l) -814

    asked by yr
  7. Linear Algebra

    For which value of k does the matrix 8 k -9 -3 have one real engenvalue of multiplicity 2? Explain.

    asked by Anonymous
  8. math

    a local television station sends out questionnaires to determine if viewers would rather see a documentary, an interview show or reruns of a game show there were 350 responses with following results. 105 were interested in an interview show and a

    asked by jim
  9. Math

    Given that force 1=60 pounds and force 2=90 pounds, find the angle between the forces if the magnitude of the resultant force is 50 pounds. Round answer to the nearest degree and show work.

    asked by Shelby
  10. chemistry

    Balance the following redox equation occurring in a basic solution: AG + CN{-} + O2 = AG(CN)2{-} I tried...but this is wrong...2H2O+ AG + CN{-} + O2 = AG(CN)2{-}+4OH{-}... I am supposed to do half reactions...how do I spit the product AG(CN)2{-}?????

    asked by lili
  11. chem

    At a certain temperature, the reaction CO(g) + 2H2(g) CH3OH(g) has Kc = 0.500. If a reaction mixture at equilibrium contains 0.00436 M CH3OH and 0.220 M H2, what is the equilibrium concentration of CO? The answer is 0.280 M. I don't know how to get it.

    asked by chris
  12. Chem

    (a) The molar solubility of Ag2CrO4(s) at 35°C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from Appendix D, calculate the

    asked by Rebekah
  13. physics ---

    A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror. If you measure distance from the optic center of the mirror, (A) What is the focal

    asked by ashley --
  14. Chemistry

    The equilibrium constant, Kc is 3.2 x10 -34 at 25C for the reaction 2 HCl(g) H2(g) + Cl2(g). what is The equilibrium expression, Kc for the reaction

    asked by Donna
  15. chemistry

    What are the oxidation numbers for the elements in the compound C2H5COOH?

    asked by Henry
  16. Math

    A Candy box is made from a piece of cardboard that meaasures 11 by 7 inches. Squares of equal size will be cut out of each corner. The sides will then be folded up to form a rectangular box. What size square should be cut from each corner to obtain maximum

    asked by Anonymous
  17. Chemistry

    Although water and ammonia differ in molar mass by only one unit, the boiling point of water is over 100 degrees C higher than that of ammonia. What forces in liquid water that do not exist in liquid ammonia could account for this observation?

    asked by Joe Schmo
  18. chemistry

    se the information provided to determine ΔH°rxn for the following reaction: ΔH°f (kJ/mol) 3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g) ΔH°rxn = ? Fe2O3(s) -824 Fe3O4(s) -1118 CO(g) -111 CO2(g) -394

    asked by yr
  19. chemistry

    How much energy is required to decompose 765 g of PCl3, according to the reaction below? The molar mass of PCl3 is 137.32 g/mol and may be useful. 4 PCl3(g) → P4(s) + 6 Cl2(g), ΔH°rxn = +1207 kJ

    asked by yr
  20. Chemistry

    What is the mass of carbon dioxide if 100 grams of methane is oxidized to carbon dioxide and water?

    asked by joy
  21. Physics

    A trap door, of length and width 1.65 m, is held open at an angle of 65.0 degrees with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly

    asked by Julia
  22. chemistry plse help

    Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: P4(g) + 10 Cl2(g) → 4PCl5(s), ΔH°rxn = ? Given: PCl5(s) → PCl3(g) + Cl2(g), ΔH°rxn= +157 kJ P4(g) + 6 Cl2(g) → 4 PCl3(g),

    asked by yr
  23. Chemistry

    A student mixed 75.0 mL of water containing 0.75 mol HCI at 25* C with 75.0 mL of water containing 0.75 mol of NaOH at 25*C in a foam cup calorimeter. The temperature of the resulting solution increased to 35*C. How much heat in kilojoules was released by

    asked by Tarra
  24. Chemistry

    Strontium-85, used for bone scans, has a half-life of 64 {\rm d}.How long will it take for the radiation level of strontium-85 to drop to \frac{1}{8} of its original level?

    asked by Help!!
  25. Chemistry

    The recommended dosage of iodine-131 is 4.20 \mu{\rm Ci/kg} of body weight. How many microcuries of iodine-131 are needed for a 84.0 {\rm kg} patient with hyperthyroidism?

    asked by Help!!
  26. math

    A spinner is divided into 5 equal sections numbered 1, 2, 3, 4, and 5. If the spinner is spun and a coin is tossed, what is the probability of getting a tail on the coin and an odd number on the spinner

    asked by Lo
  27. Chemistry

    The normal boiling point of benzene is 80 degree C and its heat of vaporizations is 30.8 kj/mol. What is its boiling point at the top of Pikes Peak where P=260 mmHg?

    asked by Tyler
  28. Chemistry

    ia 3ag2S+2AL = 6 ag +al2s3 a double replacement or single replacement

    asked by Patricia
  29. Physics

    A disk with a rotational inertia of 7 kgm^2 rotates like a merry-go-round while undergoing a torque given by (5+2t)Nm. At time 1s, its angular momentum is 5kg m^2/s. what is its angular momentum at 3s? I can't figure out how to start this problem.

    asked by Zack
  30. math

    a restaurant offered pizza with 3 types of crust and 7 different toppings. how many different types of pizzas could be offered. 7 toppings on each i came up with 21 but not sure

    asked by jimmy
  31. math

    a restaurant offered pizza with 3 types of crust and 7 different toppings. how many different types of pizzas could be offered?

    asked by jimmy
  32. Chemistry

    Use Henry's law to determine the molar solubility of helium at a pressure of 1.5 atm and 25deg C.

    asked by Anonymous
  33. Calculus 2

    Write in cartesian form: r=3tan(theta)sec(theta) im working with this function here, trying to get an rcos(theta) and/or rsin(theta) so far, i am stumped. what i have so far: r^2=3r(tan(theta)sec(theta)) (x^2+y^2)=?????

    asked by Mike
  34. math

    Suppose the revenue from producing (and selling) x units of product is given by R(x)=7x-0.01x^2 dollars. A)find the marginal revenue at a production level of 25. B)find the production levels where the revenue is $600.

    asked by Anonymous
  35. Chemistry

    If a certain gas has a density of 2.34 g/L at 27.0C and 742 torr, what is the molar mass of this gas? I am not sure what formula to use to solve this problem.

    asked by Thao
  36. ENGLISH 1

    1. In The Miracle Worker, when Helen touches her cheek she is trying to ask for A. a sweet. B. her mother. C. Annie. D. a drink. B? 2. In a play, when the protagonist encounters an obstacle, A. the exposition begins. B. the climax begins. C. conflict

    asked by surfsupmel
  37. physics

    Stan raises a 1110 N piano a distance of 5.00 m using a set of pulleys. Stan pulls in 20.0 m of rope.

    asked by Tom
  38. Chemistry

    Use Henry's law to determine the molar solubility of helium at a pressure of 1.5 atm and 25deg C.

    asked by Anonymous
  39. Chem

    (c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20 thanks!

    asked by Rebekah
  40. Physics 100

    A car traveling at a speed of 18 m/s (approximately 40 MPH) crashes into a solid concrete wall. The driver has a mass of 90 kg. a. What is the change in momentum of the driver as he comes to a stop: b. What impulse is required in order to produce this

    asked by Anonymous
  41. Chemistry

    1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

    asked by HELP!
  42. Math(Probability)

    Let X and Y equal the outcomes when two fair six-sided dice are rolled. Let W = X + Y. Assuming independence, find the p.m.f. of W when (a) The first die has three faces numbered 0 and three faces numbered 2, and the second die has its faces numbered 0, 1,

    asked by Sandy
  43. science

    Hachure lines, or lines with teeth, describe _____. a) volcanos b) mountains c) depressions d) discontinuities

    asked by Sarah
  44. Chemistry

    A 1.00 L solution saturated at 25°C with lead(II) iodide contains 0.54 g of PbI2. Calculate the solubility-product constant for this salt at 25°C. thanks

    asked by Rebekah
  45. Discrete Math

    A box contains 55 balls numbered from 1 to 55. If 8 balls are drawn with replacement, what is the probability that at least two of them have the same number?

    asked by Nick
  46. Statistics

    Among companies doing highway or bridge construction, 80% test employees for substance abuse. A study involves the random selection of 10 such companies. Find the probability that exactly 5 of the 10 companies test for substance abuse.

    asked by Chanel
  47. Math

    Could someone answer this question so I understand it. Thanks Given the supply function p = S(x)=5(e^0.02x - 1) find the average price(in dollars) over the supply interval [31,36] only the 0.02x is ^ on the e give the answer as an integer or decimal

    asked by Jules
  48. Probability

    One card is drawn from a deck. Are the events "drawing a face card" and "drawing a black card" independent or dependent?

    asked by ADO30
  49. calculus

    proponents of the peak oil theory claim that worldwide production of petroleum will soon reach a maximum and start to decline. (there is considerable debate about how soon this will occur) let P(t)= the world's rate of petroleum production t years after

    asked by Caren
  50. Chemistry

    The environmental protection agency allows 10 ppb concentration of arsenic in drinking water. What is the molarity of As in this solution?

    asked by Please HELP!!!
  51. Chemistry

    N2+O2 2NO Equillibrium Concentrations of the gases at 1500K are 1.7x10(-3) mol/L for o2 and 6.4x10(-3) mol/L for N2 and 1.1x10(-5)mol/L for NO. CAlculate the value of Kc at 1500K for these data? Show work please

    asked by Jackie
  52. Trigonometry

    Okay, Assume the triangle has the given measurements. Solve for the remaining sides and angles. A = pi/6; a = 17.4; b = 19.6

    asked by Veronica
  53. physics

    find the density of a metal ball weighs 1.8kg. volume of ball is 250cc??

    asked by srishty
  54. Chemistry

    3.5 grams of Sodium Phosphate is mixed with 6.4 grams of Barium Nitrate. How many grams of Barium Phosphate will be produced?

    asked by Andi
  55. chemistry

    Initially, there are 33 moles of A and 0 moles of B. How many moles of A and B will be present after the system reaches equilibrium? a) 33 moles A; 0 moles B b) 0 moles A; 33 moles B c) 3 moles A; 30 moles B d) equal amounts of A and B The answer is given

    asked by Adam
  56. SCIENCE

    DEFINE AND GIVE EXAMPLES 1. Sexual reproduction 2. asexual reproduction

    asked by robert
  57. Math

    Three drugs are being tested for use as the treatment of a certain disease. Let p 1 , p 2 , and p 3 represent the probabilities of success for the respective drugs.As three patients come in, each is given one of the drugs in a random order. After n = 10

    asked by Lauren
  58. science

    Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in the air to form water and sulfur dioxide, SO2. Every 61 tons of H2S reacts with 86 tons of oxygen and forms 32 tons of water. How many tons of SO2 are formed?

    asked by Anonymous
  59. social studies

    Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom?"

    asked by isamalrivera
  60. math

    If Nefertiti could pronounce her name in six tenths of a second. At that rate, how many times could she pronounce her name in 15 seconds? (write and solve a fraction division problem to answer the question)

    asked by Emily's mom
  61. finance

    consider a 6x12 fra where the underlying six-month period is 183 days and the notional is $100. The fra fixed rate is 5%. At maturity of the contract the underlying libor for six months is 7%. What is the settlement amount of the FRA? Assume the actual/360

    asked by Nick
  62. Geometry

    The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?

    asked by Tyler
  63. Chemistry

    The environmental protection agency allows 10 ppb concentration of arsenic in drinking water. If an 8 oz glass of water is at 10 ppb, how many ug of arsenic (As) is present? (8 oz= 236mL)

    asked by Please HELP!!!
  64. Statistics

    A consumer protection group reports that 25% of 5-lb bags of sugar of a certain brand are underweight. Three bags of sugar are selected at random. Assume that the report is correct. a. What is the probability that all three bags are underweight? b. What is

    asked by Pauline
  65. World History

    One cause of the Peloponnesian War was a. invasion of Athens by the Persians. b. invasion of Crete by the Mycenaens. c. conflict over control of the Delian League. d. economic and commercial rivalries among the city-states. D?

    asked by Lily
  66. Math

    Let X and Y equal the respective numbers of hours a randomly selected child watches movies or cartoons on TV during a certain month. From experience, it is known that E(X) = 30, E(Y) = 50, Var(X) = 52, Var(Y) = 64, and Cov(X, Y)= 14. Twenty-five children

    asked by Traxx
  67. Math

    Find each number to the nearest tenth. What number is 66 2/3% of 45?

    asked by Amy
  68. Chemistry

    In the following reaction, how many grams of ammonia (NH3) will produce 300 grams of N2? 4NH3 + 6NO d 5N2 + 6H2O

    asked by Rachel
  69. math

    A boat traveled 45 miles downstream (w/ the current) in 3 hours and made the return trop (against the current) in 5 hours. What was the speed of the boat and what was the speed of the current?

    asked by mindy
  70. math

    State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the

    asked by Lo
  71. French

    Guillaume voyage avec ______ soeur et _______ parents. i have to use " SON , SA, OR SES " as appropriate.

    asked by Nadia
  72. operations management

    given the following information, provide an example of how much of farmers sausage gravy mix should be ordered. You are doing the order for thursday. service level 95%, and standard deviation of 3.5 units per week, and a moving average weekly demand of 35

    asked by rose
  73. physicss

    an. Electron travels in a circular orbit of radius 0.5 a and frequency of 5.5*10^7hz. Findthe magnetic field produced At center

    asked by A
  74. Programming Logic

    I need to create a flowchart/psuedocode for a dice game that give you 2 rolls with 5 dice, 3 rolls per game. the computer will roll the 4 dice and calculate your score. my question is...do i need to repeat this 3 times and can i use nested loops and if

    asked by Jenna
  75. Spanish

    26. "Luisa, te presento a la señora Ortega." "________" a. !Feliz cumpleaños! b. ¿Como estás? c. Ahora te conozco d. Encantada B? 27. Me encantan ______. Todos llevan algo muy divertido. a. las fiestas de disfraces b. los regalos elegantes c. los

    asked by mysterychicken
  76. algebra2/trignometry

    in right triangle PQR,Q=90DEGREE,PQ=4 AND PR=7 WHAT IS ANGLE R TO THE NEARST TENTH OF A DEGREE

    asked by mathew
  77. Math Word Problem

    Need a formula for this math problem. Help!? Relinda owns a tea shop and is creating a new mix of tea for her customers. She is using a standard black tea that sells for $7 per pound and a special orange flavor that sells for $11 per pound. She is planning

    asked by Nicki
  78. maths

    what volume of distilled water must be added to 165mls of stock solution to make 1200mls of diluted solution

    asked by Anonymous
  79. government

    According to the age-cohort tendency, significant changes in the pattern of political socialization is typically concentrated among: retired citizens. younger citizens. middle-aged citizens. citizens that have children.

    asked by Anonymous
  80. Math

    A consumer buys n light bulbs, each of which has a lifetime that has a mean of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes,

    asked by Alex
  81. Chemistry

    3.5 grams of Sodium Phosphate is mixed with 6.4 grams of Barium Nitrate. How many grams of Barium Phosphate will be produced?

    asked by Andi
  82. english

    Based on the readings in Ch. 3, identify key points to keep in mind when writing a topic sentence. How might these key points help you write effectively?

    asked by bib
  83. Math

    A consumer buys n light bulbs, each of which has a lifetime that has a mean of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes,

    asked by Lo
  84. math

    Which of the following integrals computes the volume of the solid formed by revolving the region bounded by the graph of y = Ln(x), the x-axis, and the line x = 3 about the line x = 3?

    asked by anonymous
  85. Hcs 490

    What effects or potential effects do technologically based communication modalities—between patients and health care providers and between health care providers only—have on health care costs? Discuss at least 2

    asked by rona
  86. public speeking

    What might be some modern examples of speech styles that weren't discussed in the lecture? Defend why you consider these to be modern styles. In the lecture-new channels of speaking that have developed as a result of changes in technology. New forms of

    asked by deedee
  87. Chemistry

    What will be the molarity of the resulting solutions made by mixing the following? Assume that volumes are additive. 91 mL of 0.42 M HNO3 with 59 mL of 1.6 M HNO3 i know that i'm going to use the formula M1V1=M2V2, but i'm not sure what numbers to

    asked by Sam
  88. World History

    The Peloponnesian War began, in part, because of a. economic rivalries among Greek city-states. b. threats of invasion by the Mycenaens. c. alliances formed among Sparta, Persia, and Crete. d. arguments over control of the Delian League. A?

    asked by Lily
  89. calculus

    a cake is put into an oven to bake. the temp, H, of the cake (F) is a function of how long it has been in the over, t (min). thus, H=f(t) What does f'(t) represent? is f'(t) positive or negative? is f"(t) positive or negative?

    asked by Caren
  90. Math

    faizel wants to travel from his house to the hardware store that is six blocks east and five blocks south of his home. If he walks east and south, how many different different routes can he follow from his house to the store? Can somebody help me setup

    asked by Jay
  91. Algebra

    I am resubmitting - Simplify: 3x^2 y^6 Z^2 ------------ (dividided by) 4x^4 y^3 Z^4 my answer ?? 3y^2 ------- 4x^2 Z^2

    asked by mary
  92. Math(Probability) need help

    Three drugs are being tested for use as the treatment of a certain disease. Let p 1 , p 2 , and p 3 represent the probabilities of success for the respective drugs. As three patients come in, each is given one of the drugs in a random order. After n = 10

    asked by Lauren
  93. Chemistry

    How many Kilograms of water must be added to 5.0 grams of oxalic acid (H2C2O4) to prepare a 0.40 Molality?

    asked by Laura
  94. geometry

    If X = 10 cm and Y = 24 cm, what is the length of Z?

    asked by Taylor
  95. Chemistry

    How many grams of bromine can be obtained by the decomposition of 92.0 of MgBr2?

    asked by Mel
  96. Math

    The line for the Dunking Machine was twice as long as the Cake Walk line. The line for the Cake Walk was one-third the length of the line for the Hoop Shoot. If there were 12 people in line for the Hoop Shoot, how many people were in the line for the

    asked by Rosa
  97. Chemistry

    how many grams of CaCl2 would be required to be added to water to prepare 1 liter (1000 ml) of a 1.72% (w/v) aqueous solution of CaCl2?

    asked by Tia
  98. Chemistry DrBob

    I don't understand how you get the answer. I really don't understand any of this, how do I set it up with the numbers? once i get how to do this, then i feel i will understand how to set these up from here on out. so if you could, show all your work,

    asked by Ben
  99. Math/117

    Because we are working with exponents, your answer should be in exponential form. How would you respond to this problem including exponents? 3^5 * 3^5. What rule would you apply?

    asked by Mary
  100. chemistry

    If 0.075 g of MgF2 dissolves per liter of solution, calculate the solubility-product constant. I got 2.0e-9 but it was not correct.

    asked by Rebekah
  101. Physics

    A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 8 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 29 cm away from the pivot. If the person exerts a force of 110

    asked by Anonymous
  102. Math

    Jessica can jog to work in of an hour. When she rides her bike, it takes her of an hour. If she rides miles per hour faster than she jogs, how far away is her work?

    asked by Anonymous
  103. Physics Class

    A 166 g mass is attached to a horizontally mounted spring. It is pulled out to stretch the spring and then released. You determine the period of the oscilliation to be 1.0 seconds. What is the acceleration of the mass (magnitude) when the spring is

    asked by Paige
  104. Chemistry

    (A). A reaction with a known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter. (B). When 1.00 g of C2H6(g) is

    asked by Ben
  105. English

    Thank you very much. I included my corrections in brackets, when necessary. 1)The front door is where Dr Jekyll is seen and represents his public face. 2)His friend moves like a guttering candle which is about to go out.He describes the face of his dying

    asked by Henry1
  106. Pre-Calculus

    I need help on these problems they are from my study guide and i don't have a clue on how to do these 3 problems and if anyone can show the steps and somewhat explain the steps so i can do it myself next time. 1.) sin25‹cos35‹sin‹35 The answer

    asked by K.C
  107. chemisrty

    could freezing point depression be used for substances not soluble in water?

    asked by Anonymous
  108. geometry/help

    Find the area of a regular heptagon with the side 7 cm. answer 178.1 cm² can you check

    asked by mike
  109. Algebra

    45x divided by 6t x 11x I have tried to work this out, however, do not understand it at all. The book gives an answer of (55x squared)t. Can anyone explain this to me? Thank you

    asked by tish
  110. Algebra

    multipy & simplify 2a^2 b^3 x 4a^-3 b^-2 ---------- ------------ 2ab^4 9a^2 b My answer: 2 ------ 3a^12 b^24

    asked by mary
  111. geometry

    given that BD and AC are perpendicular, what is the length of Ac? AB=9.4 BD=7.9 BC=23.2

    asked by ashlie
  112. chemistry

    a reaction witha known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter.

    asked by ben
  113. blair

    Sitting motionless on a playground swing. The downward force is 500 n. How much force is there on each of the two swing chainsv

    asked by maria
  114. Chemistry

    How do I balance the following into an equation? 10 mL of 2.0 M HCl is react with 8 mL of 1.7 M Ca(OH)2 in a neutralization reaction.

    asked by Please HELP!!!
  115. physicss

    an. Electron travels in a circular orbit of radius 0.5 a and frequency of 5.5*10^7hz. Findthe magnetic field produced At center

    asked by A
  116. About Mcdonalds--Good bad?(no sites please)

    Identify ways in which Mcdonalds is being socially responsible. To what point, u think Mcdonalds is being genuine in their concern and to what degree u believe this is public relations exercise made to improve Mcdonalds image. Support with evidence. This

    asked by Anonymous
  117. Math

    What are the dimensions of a square resulting from doubling the area of a square measuring 4 feet by 4 feet

    asked by Maite
  118. algebra

    Stacey throws two dice. The difference in face value between the two dice is three, and the product of the numbers thrown is equal to twice the sum of the two numbers. Show and solve an alebraic equation that finds the numbers Stacey threw.

    asked by Ella
  119. comm

    Read the summary paragraph on the bottom of p. 37. Identify the author’s goal in writing the paragraph. How effectively do you think the author met that goal? The paragraph is below. Hockenbury and Hockenbury tell us that daily hassles often cause more

    asked by jenny
  120. English

    As promised, I'm sending you 5 sentences I'm finding it difficult to change. Thank you. 1)In the second stanza there is the description of a gas attack toward the trenches: a white fog raises up suddenly. While the poet manages to wear the gas mask,

    asked by Henry1
  121. HCS/457 - PUBLIC AND COMMUNITY HEALTH

    Why is it important to consider the components of the social ecology framework in community and public health?

    asked by Linda
  122. Chemistry

    What is the formula for measuring turbidity?

    asked by George
  123. MATH

    A six pack of soda pop is $3.99. How much is one soda pop, rounded to the nearest penny?

    asked by Pseudonymous
  124. chemistry

    How many grams of hydrogen peroxide must decompose to give 255 mi of oxygen gas at stp?

    asked by courtney
  125. chem

    We can treat the equilibrium constant as the ratio of the forward rate constant, kfwd, with respect to the reverse rate constant, krev. That is: Keq = kfwd / krev. Which statement is true? a) kfwd > krev b) kfwd < krev The answer is A but how would you

    asked by Adam
  126. Corporation-Definition

    Corporation is a type of business. A separate organization from those persons who run it. A corporation provides limited responsibility, easy transfer of ownership and unlimited life. More to this???please????

    asked by Anonymous
  127. Algebra

    Simplify: 3x^2 y^6 Z^2 ------------ (dividided by) 4x^4 y^3 Z^4 my answer ?? 3y^2 -------- 4x^2 Z^2

    asked by mary
  128. geometry

    can i have different types of quadrilaterals and their properties

    asked by aubrey
  129. mat

    Marcus flips a coin and tosses a six-sided die with the sides numbered 1 through 6. What is the probability that he gets a head on the coin and a number divisible by 3 on the die

    asked by Lo
  130. math

    90,40,15. What is the next number in the pattern and what is the rule for the pattern

    asked by theresa
  131. math

    A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times

    asked by Lo
  132. Biology

    A population of animals has a dominant allele for dark-colored fur and a recessive allele for light-colored fur. If the population of animals is 100 and 12 members of the population have the light-colored fur, about what percentage of the population is

    asked by Jenny
  133. world history

    I need help in the Yom kippur war 1973. In one-two paragraphs, explain the event that you chose. Be sure to mention those directly involved in the event, its causes, what happened, and its final outcome. and it says stay away from online study guides and

    asked by Alex
  134. Math

    Draw the lines of symmetry in a 3 cm square. How many lines of symmetry are there?

    asked by Brant
  135. Phyiscs

    A woman is standing on the middle of a ladder that leans up against a building, with an angle of 65 degrees from the ground. The wall is very slippery and the ladder is very light. What is the minimum coefficient of friction needed between the ground and

    asked by Anonymous
  136. Math

    What is the probability that at least 2 people in a random group of 4 people have a birthday on the same day of the week? Answer:

    asked by Meghan
  137. Chemistry

    If a person has a BAC (blood alcohol concentration) of 0.08% v/v, would it be considered higher than the legal limit if the legal limit was 0.08 g/dL? (The density of ethanol is 0.789g/ mL)

    asked by Please HELP!!!
  138. math

    The width of a rectangle is three fourths of the length. The perimeter of the rectangle becomes 50 cm when the length and the width are each increased by 2 cm. Find the length and the width.

    asked by risha
  139. macroeconomics

    How much of a change in the economy will result if business increase their level of investment by $8 billion and the MPC in the economy is 4/5? If the MPC is 2/3?

    asked by sue
  140. Pre Chem

    How much heat will be produced when 16grams of C2H6 burns? The reaction is 2 C2H6 + 7 O2 --> 4CO2 + 6 H20 triangle heat = -350kJ

    asked by Laura
  141. convert money (practice)

    In 2005 admission to the Bronx zoo was $6 for a child and admission to the toronto zoo was 11 candian dollars. Using the exchange rate of 1.2403 candian dollars per U.s dollar which zoo's admission costs more in U.S dollars. I think its Bronx Zoo.

    asked by christomes
  142. Chemistry

    The normal concentration of sodium chloride in blood is 0.9% (w/v). Therefore, assuming FW for Nacl of 58.4 g/mole, an isotonic 0.9% (w/v) saline would have how many milli-equivalents per liter (mEq/L) of Na ions? Can you show me how you came up with this

    asked by Lady L
  143. Math

    Evaluate the following indefinite integral. Use C as the arbitrary constant. ç(12 /ãx+12ãx)dx Only the x's are under the root symbols. I got 6x^1/2 +8x^3/2+C as my answer. Is that correct?

    asked by Anonymous
  144. Math

    A child's train ticket costs $7. That is 1/4 as much as an adult's ticket. How much does an adult's train ticket cost?

    asked by Jasmine
  145. algebra

    a merchant wants to stock the shelves with 100 Ibs. of a mixed nuts that cost $8.00 a Ibs. the merchant has cashews and peanuts. peanuts cost $6.00 a Ibs. and cashews cost $12.00 a Ibs. how many Ibs. of each should the merchant use in the mixture?

    asked by mindy
  146. chemistry

    what is the formula for hydrate copper(II) CHLOride Tetra-hydrate?

    asked by nikki
  147. Physics

    A 965 kg car is driving along a boardwalk. The car's center of mass is 45 cm in front of the rear wheels, and the distance between the front and rear wheels is 2 m. What total force does the car's front tires exert on the boardwalk? Give your answer in

    asked by Anonymous
  148. Quick Question

    I am typing a three page paper about technological changes and its impact on society during the 1870-1945 time period. Can someone please give me two great websites on the topic. These websites mus include accurate info. It can not be an commercial

    asked by Willy Wonka
  149. english/help please

    I have a project in Brave new world. I have to make a flag that represent the society .Can you give ideas or symbols to represent the different aspects of their society and what color to use too. please and thank you very much.

    asked by mike
  150. Chemistry

    If the molar volume of an ideal gas is 22.4 L/mol, calculate the theoretical density of hydrogen gas at STP. Not sure what formula to use with this question. Thanks.

    asked by Thao
  151. physics

    A 37 ohm lamp and a 59 ohm lamp are connected in series and placed across a potential of 43 V. What is the equivalent resistance of the circuit? What is the current in the circuit? Answer in units of A. What is the voltage drop across the first lamp?

    asked by Leslie
  152. statistics

    Suppose that a researcher wants to know if a new teaching method is more effective than the old one. What would the research hypothesis be?

    asked by MUNI
  153. Anthropology

    why do you think that members of a professional academic association(American Anthropological Association) decided to issue an official statement about race? [hint: what is politically relevant about the beginning and growth of anthropology as a

    asked by Connie
  154. The Middle Ages/ History

    Who is Joan of Arc? Would you want to be her?(To you guys)-> Explain why.

    asked by Anonymous
  155. Middle Ages/ History

    What are the steps of knighthood? Explain each step.

    asked by Anonymous
  156. Physics/Math

    The equation describing the motion of an object is y=0.8cos(4.2t+0.32). What is its period? I don't know how to figure this out?

    asked by Paige
  157. geometry

    Where is the center of an equilateral triangle? why is it there?

    asked by Aria
  158. statistics

    if there were 48 questions on a test and a student ahd 5 correct out of 48,then what would the percentage be?

    asked by ada
  159. 5th Grade Math

    I need help on how to figure out compund area of a shape. I meen we have the math part of the CRCT tommorow and I'm STILL NOT sure how to do it? Can someone please help me

    asked by Desiree
  160. English

    I did the corrections myself. Just check if they are correct. I included some of them in parentheses. 1)Interior monologue is a technic used by Virginia Woolf to broadcast the intimate thoughts of her characters. It consists of the words used to describe a

    asked by Henry1
  161. Pre-Algebra

    -My tens and units digits are consecutive integers whose product is 2/3 of my hundreds digit. -My units digit is 1/3 of my hundreds digit. -The sum of my digits id equal to the sum of the first five counting numbers. What year am I?

    asked by Shelbie
  162. math

    the rate of return for an investment can be described by a normal distribution with mean 22% and standard deviation 3%. what is the probability that the rate of return for the investment will be at least 15%?

    asked by Carola
  163. physics

    Young's modulus for a rod is 4 X 4x10 to the 11th power. what strain will be produced by a tensile stress of 420 MPa? I don't know where to start with this...

    asked by Beth
  164. Math

    Which nonstandard measurement unit is closest to a decimeter?

    asked by Hailey
  165. statistics

    If you have a population mean of 50 and a population standard deviation of 5 and you select a sample size of 100, what is the probability that the sample mean is between 47 and 49.5?

    asked by tom
  166. chemistry

    how does an ionic solute dissolve in water?

    asked by pat
  167. chemistry

    How many grams of hydrogen peroxide must decompose to give 255 mi of oxygen gas at stp?

    asked by courtney
  168. Philosophy

    In what ways can we say that quantum physics both is and is not classical science?

    asked by Humanities
  169. trig

    Verify the equation is an identitiy: cot(x)tan(x+pi) - sin(pi-x)cos((pi/2)-x) = cos^2x Thanks

    asked by Chris
  170. trig

    A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in terms of cos(PIa/4). Types of Identities: Double Angle, Half Angle, Sum and Difference of Sine, Cosine, and Tangent, Pythagorean,

    asked by Blake
  171. Math

    I cant figure this question out. I could use some help. Solve for x lnx-lnx^2+ln5 = 0 Simplify the answer

    asked by Erik
  172. Chemistry

    If the solubility of arsenic trioxide in water at 25 C is 20g/1L water, would 250mL of water at 25 C containing 3.5g of arsenic trioxide be saturated, unsaturated, or supersaturated?

    asked by Sarab
  173. Linear Algebra

    Let A be a diagonalizable n x n matrix. Prove that if B is any matrix that is similar to A, then B is diagonalizable

    asked by Anonymous
  174. physics

    a body is dropped from the roof of a builindgs 10 m high .calculate the time of fall and the speed with which it hits the ground .take g=10m/second sqare

    asked by Anonymous
  175. algebra 2

    Not sure if either one of these answer are correct to simplify the sqrt for 24 1) 24 = 6 x 4 square root of 24 = square root of 6 x 4 2 root 6 2) sq root 24 = sq root (4x6)= sqrt 4 x sqrt 6= 2sq root 6=4.89898 3) Square root of 24 =sqrt (24) =sqrt(4*6)

    asked by plese help me
  176. please help` ORGANIC

    synthesize olivetol from benzene

    asked by Sandy
  177. geometry

    Why is the apothem of an equilateral triangle 1/3 its height?

    asked by Aria
  178. Algebra (Quadratic Equations)

    Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < - X ^ 2 X^2 + Y^2 < 16

    asked by Christina
  179. calculus

    as i drive to the city, let f(t) be the total distance i have traveled t hours after starting my trip. i left my house and began my trip at exactly 12 noon. just a fraction of a second before 2 pm, i cam across a construction zone, and so i hit the brakes.

    asked by Caren
  180. maths

    name properties of quadrilaterals through transformation

    asked by aubrey
  181. health care economis

    n terms of supply and demand, is price the only thing that matters? Which economic staple, supply or demand, does the healthcare reform bill affects the most?

    asked by keisha
  182. business

    what is the chronological order of the major legislation that makes up the history of employment law in this country? for each law, state the social problem the law was designed to address and whether the law has solved the problem.

    asked by Sean
  183. biochemistry

    given 3 fat samples and told that one of them contains cholesterol,outline the test you would use to identify which of these samples contains cholesterol.

    asked by johanna
  184. accounting

    Y company offers its customers credit of 2/10,n 30. Most customers take advantage of the cash discount, mailing their payment to arrive on the 10th day following the date of the invoice. However X comany, Y largest customer, has recently begun sending

    asked by natyyyy
  185. Geography

    Omg i'm having such a hard time doing this geography assignment! Can someone please help me! Write a short essay consisting of a few paragraphs. Describe the various types of forest vegetation making sure you give good examples describing the location and

    asked by surfsupmel
  186. English

    I just finished reading Macbeth for school. My teacher assigned a essay for us to do. She asked if we think the witches' predictions were right or if the witches' predictions were disappointing because of duality and doublespeak. I said that I believe in

    asked by Kate
  187. Algebra

    Can someone explain to be how to put (x/ (x^2-4)) in another form... please show step by step thank you!

    asked by Jasmin
  188. Math - Please Help

    Okay, Assume the triangle has the given measurements. Solve for the remaining sides and angles. A = pi/6; a = 17.4; b = 19.6

    asked by Veronica
  189. math

    whats 16-4+1 to the 2nd power i wish i was smart

    asked by blahhhhh
  190. Math

    Find the instantaneous rate of change for the function at the given value. f(x)=x^2+2x at x=-4

    asked by Jay
  191. Spanish

    36. El baile va a ser muy elegante. Debo llevar ________. a. tenis b. calcentines c. zapatos de tacón alto d. novio C? 37. "¿Dónde está papa?" "Fue al teatro para comprar ____ para regalarle a Diana." a. descuentos b. unos trajes c. dos entradas d.

    asked by mysterychicken
  192. Math

    A rectangular parking lot is 25 ft. ny 50 ft is increased on all 4 sides by the same amount. The area increased by 400 sq ft. What are the new dimensions of the parking lot?

    asked by Sally
  193. ART/101

    summarize the comparing characteristics and innovations of each Greek and Roman architecture in 200-300 words

    asked by Desiree
  194. math

    Differentiate the following function y = e^x^5-7x-8 the answer is e^x^5-7x-8(5x^4-7), but Id like to know how to work it out.

    asked by Anonymous
  195. Australian Legal Studies(Law)

    Explain the process of amending the Australian Constitution. Give details of events leading up to the 1999 referendum and explain its outcome. Outline some of the other issues Australia faces with constitutional reform.

    asked by Anton
  196. English

    Hiya Thanks Writeacher for your help on my earlier question. Since then I've been doing some additional research. Anyway, I think Waltzing Matilda is beneficial to the National Identity because it reinforces the idea that Australians live in the bush and a

    asked by Harriet
  197. Math

    Three drugs are being tested for use as the treatment of a certain disease. Let p 1 , p 2 , and p 3 represent the probabilities of success for the respective drugs. As three patients come in, each is given one of the drugs in a random order. After n = 10

    asked by Lauren
  198. Chemistry

    Please give me the formula for measuring turbidity. I already know about the wikipedia defintion and explanation. Thanks

    asked by George
  199. math

    if all nos in the equation y/y+101 = 11in base 2, solve for y

    asked by tim
  200. Chemistry

    If 25 ml of bromine, a liquid element at room temperature, is added to 100 ml of water, what would be the resulting molar concentration of bromine?

    asked by Lady L
  201. math

    how do you put a fraction into a percentage

    asked by ada
  202. MATH

    On july 1,2005 there were 8.2765 chinese yuan per $1 and 1.1957 euros per $1. On the same day, how many euros were equal to 1 yuan? I think the answer is 9.8962euros IF MY ANSWER IS WRONG PLEASE GIVE AN PROPORTION TO START OFF

    asked by christomes
  203. Algebra 2

    What is the sum of the arithmetic sequence 22, 13, 4 … if there are 28 terms?

    asked by Anonymous
  204. Chemistry

    Can you show me the calculation? How many ml of a 2 M solution of HCL would be needed to neutralize 2 ml of a 5 M solution of KOH?

    asked by Tia
  205. business

    Your employer believes women are treated as inferiors int he department where he works. He has complained to his supervisor and the EEOC. The supervisor has responded by reducing his salary and opportunities for overtime. Does he have a case against the

    asked by Sean
  206. Algebra

    45 ÷ 6t x 11x I have already posted this question and received an answer. However, brackets weren't used and so still seeking understanding. I was trying to divide 6 into 45 then multiply 11x, but it isn't working out as the book answers. Once again,

    asked by tish
  207. physics

    what is thw momentum of an object of mass 10Kg at rest?

    asked by kay
  208. Math

    A does 20% less work than B .If a complete a piece of work in 7& 1/2 hours then B can do it in options- 5,5&1/2,6,6&1/2 plz solve without using x and y method

    asked by Apoorv
  209. U,S History

    which of the following caused a split in the women's suffrage campaign? A:Alice Paul's agressive strategy B:Carrie Champman Catt's "Winnin Plan" C:the decision to press for a constitutional amendment D:World War I

    asked by Ace
  210. Chemistry

    I forgot to post this one with the other What is the freezing point of a solution containing 4.0 Mol of sodium chloride in 1200 grams of water? (kf for water is 1.86 C/M) I don't really want the whole answer, just where I would plug in the numbers. I keep

    asked by Laura
  211. Math

    the number has four digits the thousandsdidit is twice the hundreds digit the ones digit is divisible by 5 the sum is 13

    asked by Amanda
  212. Social Studies

    how does the Articles of Confederation affect our society today?

    asked by Anonymous
  213. math

    solve the following polynomial and rational inequalities 2x^2+x-6>0 i need some help with this

    asked by justins
  214. public speaking

    What are some moderen examples of speech styles?

    asked by deedee
  215. Music

    How to play Hot Cross Buns on the recorder

    asked by Syran
  216. Math

    Computer processors are shipped in lots of 70 from a factory. Before being shipped, 21 are randomly tested from each lot. If any of these 21 fail, the entire lot is not shipped. What is the probability that a lot containing exactly 4 bad processors gets

    asked by Heather
  217. Math

    I am a two digit number. The digit in my ones place is 4 times greater than the digit in my tens place. The sum of my digits is 10. What number am i ?

    asked by Anonymous
  218. English

    Which word has a vowel in it's second syllable? A. away B. Handle C. Cancel

    asked by Hailey
  219. English

    Which word has a vowel team in it's second syllable? A. Gentle B. Enjoy C. Formal

    asked by Hailey
  220. physics 201

    A particle has an acceleration of +6.11 m/s2 for 0.281 s. At the end of this time the particle's velocity is +9.06 m/s. What was the particle's initial velocity?

    asked by desmund
  221. physics

    a body is dropped from the roof of a builindgs 10 m high .calculate the time of fall and the speed with which it hits the ground .take g=10m/second sqare

    asked by Anonymous
  222. ALGEBRA

    (-13,-15) and (-6,-18) Find the slope, if it exists, of the line containing the pair of points

    asked by MATH
  223. Algebra

    Can someone explain to be how to put (x/ (x^2-4)) in another form... please show step by step thank you!

    asked by Jasmin
  224. English

    In my previous post I included the following sentence checked by Bob. I can't understand the correction. 1) They have no boots, so their feet bleed (correction: bled? Why is the past needed?). I did other corrections myself. Can you check them, please?

    asked by Henry1
  225. language arts

    Where does a puffer fish live? encyclopedia,dictionary,atlas,globe

    asked by esha
  226. OChem

    Why would diethylammonium chloride insoluble in ether? Is the only reason why the salt is insoluble because of polarity, or are there other reasons why? Please explain.

    asked by anon
  227. Algebra

    Simplified is (3x)0 power exponent simplified as 3x or 0 (also how do I express a power after a # when asking a question)

    asked by mary
  228. English

    Can you please check these sentences? I did some of the corrections myself. 1)He wishes his portrait, made by a painter called Basil, grew old in his place. 2) Dorian wants eternal life and youth whereas Faust aims at/for infinite knowledge. 3)The aim of

    asked by Henry1
  229. algebra

    Need help on the following questions. What is the y-intercept of a line with the equation (y - 3) = 5(x + 2) and What is the slope of a line with the equation y = -x + 6

    asked by Nyk
  230. Algebra

    (a^2 b^3)^2 ----------- (a^4 b^2 c)^2 Is Simplified answer b^2 --------- a^4 c^2

    asked by mary
  231. 6th grade math

    Ther jester was juggling in the medieval fair, and all three where different sizes and colors. The jester wanted to put them in order from least to greatest. The red ball had a diameter of 100 mm the green ball had a radius of 4 cm and the yeallow ball had

    asked by Ann
  232. Math(Check)

    if the exchange rate between venezuelan and american currencies is 2144.6 bolivars per u.s dollar, about how many u.s dollar can you get for 500 bolivars i think the answer is $4.28

    asked by christomes
  233. Family Structure

    1)Do you think Western marriages would last longer if they were arranged by parents? Why or why not? 2) What type of family do you think will be the norm 50 years from now? Why?

    asked by Alex L.
  234. Geometry

    Why is the apothem of an equilateral triangle its one third height?

    asked by Liana
  235. Algebra

    I am really having problems with monomials: Please help! Simplify: 4x^2 y^3 Z ----------- (divided by) 5y^4 Z^3 is the answer 4x ------ (divided by) 5yz^2

    asked by mary
  236. Chemistry

    A solution is prepared by adding of KOH to 1 liter of water. The resulting solution has an [OH negative]of 1 * 10 negative 3. What would be the pOH of this solution? Can you show me how you came up with this answer? Thank you.

    asked by Tia
  237. Math HELP PLEASE

    find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is negelcted. The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2 Please give lots of details in

    asked by Daphine
  238. math

    If you received an annual salary of $22,500.00 paid monthly, what would your gross pay be each pay period?

    asked by ashia
  239. physics

    what is the speed of light moving through a medium of index refraction 2.45?

    asked by kay
  240. calculus

    how to integrate surd (1+4x^2)?

    asked by awoz
  241. English

    I forgot to include the following corrections I did myself. 1)In this way, the signs of age and corruption appear IN the picture. He makes a reflection (he meditates upon) about the sadness of war. He dreams of his dying friend. He describes his friend’s

    asked by Henry1
  242. english

    what is the pro noun in this sentence... I like baseball most of all.

    asked by destiny
  243. Math

    True Or False A.16-(3+5)=18 B.(4+2)*5=30 C.100%(25+25)+5=7 D.15-4*3+2=35 E.(40-2*2)%6=6

    asked by Frances
  244. chemistry

    a reaction witha known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter.

    asked by ben
  245. Math

    I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0

    asked by joe
  246. Australian Legal Studies

    Explain the process of amending the Australian Constitution. Give details of events leading up to the 1999 referendum and explain its outcome. Outline some of the other issues Australia faces with constitutional reform.

    asked by Anton
  247. English

    I forgot to include the following sentences. I need to express the following ideas using fewer coordinate clauses. Thank you. 1)In the second stanza there is the description of a gas attack toward the trenches: a white fog raises up, suddenly, and while

    asked by Henry1
  248. PRECALCULUS

    factor x^3 - 2x^2 + x - 2

    asked by YOSHINATOR
  249. English

    Thank you very much. I included my corrections in brackets (nearly always). 1)I can't understand one of your corrections: he wishes the portrait would grow old in his place (why is "grew old in his place" wrong?) 2)Beauty has got a divine right of

    asked by Henry1
  250. English

    I did the corrections myself. I included them in brackets. Can you see if they are correct? Thank you. 1)The subject of the poem is the description of some soldiers while they are retreating through (toward) their trenches. 2)They should be young and

    asked by Henry1
  251. chem

    how many moles of water are present in one mole of zinc sulphate and write the formula for this?

    asked by Anonymous
  252. Jiskha

    I can't find my last spanish post from yesterday... Also, the search box now doesn't take me to my most recent post if I type in "mysterychicken" like it used to; why not? Thanks -MC

    asked by mysterychicken
  253. math

    Compute the following limit: sqrt x+4 -2/x lim x-->0 the x+4 is the only thing under the square root. the answer is .25, but id like to know how to work this out

    asked by Anonymous
  254. Math

    A right circular cylinder with a height of 20 cm and a right circular cone share a circular base and have the same volume. What is the height of the cone?

    asked by Meghan
  255. Math

    find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is negelcted. The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2 Please give lots of details in

    asked by Gerry
  256. Math

    My choices are a. a large paper clip b. The width of your hand c. The length of your arm d. Your height

    asked by Hailey
  257. Sociology

    How do social scientists help people face the prospect of death and the sadness of a loved one?

    asked by Alex L.
  258. math

    Could someone work this out so I understand it. Thanks Solve: 6^x = 1/36 x =

    asked by Anonymous
  259. english

    what is the adverb in the following sentence. These birds swoop down to catch fish scraps.

    asked by jahmya
  260. Math

    I have a math problem i need help with. Thank you. Problem: let's say there is a 15% chance of getting strep if you are exposed to a person with strep. Let’s say there is a 50% chance that you were exposed. a) What is the probability that you will get

    asked by Aliciamimi
  261. algebra

    If 1/8 = 12 1/2% what percent does 3/8 equal?

    asked by Emily
  262. Government

    Can the president veto the choice of congress's salary?

    asked by Diana
  263. 6th grade math

    There are three crowns in the royal cabinet: One for the King, One for the Queen, and one for the Princess. The king's circumference was 21.98 in, the Queen's circumference was 43.96 cm and the Princess' circumference as 392.5 mm. What are the Diameters's

    asked by Ann
  264. chemisty

    calculate the molarity of a solution with .2 moles of sodim hydroxide dissolved in .5L of water

    asked by Anonymous
  265. English

    Slaughter House Five For whatever reason, Billy cannot tell his wife, Valencia, about his Dresden experiences but fluidly recounts minute derails to Montana Wild hack. Why is this? Is she form of earth mother? A fantasy for bored, middle-aged married men?

    asked by Dhruv
  266. oscillation nad waves

    find the equivalent spring constant for a system of two spring of constant k 1 and k2 connected in series .use your result to explain to explain what happens when a sprin g of constant k is cut into two equal halves

    asked by deepak
  267. help Fast ( physics)

    a 0.5 m^2 solar collector radiation from the sun and focuses it on 250g of water that is inially at 23 degrees . the average intensity of radiation arriving from the sun at this location is 550 Wm^-2. if you assume that this is collected with 100%

    asked by H.T
  268. Cab someone help me below?

    can someone help me below with the question i poisted i don't understand i need help thanks!

    asked by rona
  269. Mcdonalds - English

    Can someone also please help me below, and Ive added my answers as well.

    asked by Anonymous
  270. Math

    What is the reduced fraction of 8/15?

    asked by Gavin
  271. calculus

    f(x)=2x+3; on [0,4] with 4 subintervals

    asked by Anonymous
  272. Criminal Justice

    Could some please help me with this? I am not sure what to really say. Thanks! Describe the historical development of police agencies and their jurisdiction. Thanks so much for the help!

    asked by Helen
  273. REWORDING

    exploit the masses Need help rewording

    asked by Anonymous
  274. Pre-Calculus

    How do I solve, in radians and degrees, 2-3sin(3(x-pi))=6?

    asked by Michelle
  275. algebra

    2(8u+2)=3(2u-7)

    asked by Anonymous
  276. algebra

    You choose a head coach and an assistant from a group of 12 applicants. How many different groupings are possible?

    asked by Jess
  277. Math(Probability)

    The joint p.m.f. of X and Y is f(x, y) = 1/6, 0 ≤ x + y ≤ 2, where x and y are nonnegative integers. (a) Sketch the support of X and Y. (b) Record the marginal p.m.f.’s f1(x) and f2(y) in the “margins.” (c)Compute Cov(X, Y). (d)Determine ρ,the

    asked by Alex
  278. Algabra

    I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0

    asked by justin
  279. compound predicates

    how do you use the word evaporate in a compound predicates?

    asked by giulissa
  280. math

    how do you factor the following quadratic expression? 6t^2-26t+8

    asked by danielle
  281. arithmetic

    11/12-5/12

    asked by Anonymous