Questions Asked on
March 16, 2012

  1. CHEM

    Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help

    asked by Srah
  2. Pre-Calc

    The Greek mathematician Eratosthenes (ca. 276-195 B.C.) measured the circumference of the earth from the following observations. He noticed that on a certain day the sun shone directly down a deep well in Syene (modern Aswan). At the same time in

    asked by Jessica
  3. Chemistry

    Refer to the following equation: 4NH3 + 7O2= 4NO2 +6HO, How many moles of ammonia would be required to produce 11.9 mol of water? Can you please walk me through the steps on how to figure this problem?

    asked by Jessica
  4. physical

    baseball is hit with a speed of 30.0 m/s at an angle of 50 It lands on the flat roof of a 10m tall nearby building, If the ball was hit when it was 1.5 m above the ground, what horizontal distance does it travel before it lands on the building?

    asked by asem
  5. chemistry

    which pair(s) of liquids will be miscible ? H2O AND CH3CH2CH2CH2CH3(PENTANE) C6H6 (BENZENE) AND CCl4(CHLOROFORM) C2H5OH (ETHANOL) AND CH3COOH(ACETIC ACID) how do you know if they are miscible?

    asked by kim
  6. chemistry

    Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=? J/mol*K My answer is: deltaS(sys)=-253.3J/mol*K

    asked by Leila
  7. Econ

    The New York Times cost $0.15 in 1970 and $0.75 in 2000. The average wage in manufacturing was $3.23 per hour in 1970 and $14.32 in 2000. a. By what percentage did the price of a newspaper rise? b. By what percentage did the wage rise? c. In each year, how

    asked by Alan
  8. Math-Probability

    A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

    asked by Emma
  9. maths: plzz help

    (a) A polygon with n sides has a total of 1/p*n(n-q) diagonals, where p and q are integers. (i) find thhe value of p and q (ii) find the total number of diagonals in a polygon with 100 sides (iii) find the number of sides of a polygon which has a total of

    asked by preeti
  10. math

    if 2/12 yards of wire cost 15 cents what will 20 yards cost

    asked by Anonymous
  11. Physics

    A uniform solid sphere rolls down an incline without slipping. If the linear acceleration of the center of mass of the sphere is 0.21g, then what is the angle the incline makes with the horizontal?

    asked by Sean
  12. physics

    Three particles, each of mass 3.0 kg, are fastened to each other and to a rotation axis by three massless strings, each 0.360 m long, as shown in the Figure. The combination rotates around the rotation axis with an angular velocity of 19.0 rad/s in such a

    asked by Katie
  13. physics

    Two children, each with mass m = 11.0 kg, sit on opposite ends of a narrow board with length L = 4.5 m, width W = 0.30 m, and mass M = 9.4 kg. The board is pivoted at its center and is free to rotate in a horizontal circle without friction. What is the

    asked by Katie
  14. Chemistry

    An aqueous solution that 2.10 M in AgNO3 is slowly added from a buret to an aqueous solution that is 1.20×10^−2 M in Cl- and 0.260 M in I- . When the second ion begins to precipitate, what is the remaining concentration of the first ion?

    asked by Ryan
  15. Physics!!

    A baggage handler throws a 16.0kg suitcase horizontally along the floor of an airplane luggage compartment with an initial speed of 1.40m/s . The suitcase slides 2.20m before stopping.Use work and energy to find the suitcase's coefficient of kinetic

    asked by Jony
  16. Physics

    The 3.80 kg cube in Fig. 15-45 has edge lengths d = 5.50 cm and is mounted on an axle through its center. A spring (k = 1300 N/m) connects the cube's upper corner to a rigid wall. Initially the spring is at its rest length. If the cube is rotated 2.00°

    asked by Anna
  17. Geometry

    What geometric figure does a regular polygon begin to resemble as the number of sides increases?

    asked by Anonymous
  18. Physics (Rolling)

    In Fig. 11-35, a solid brass ball of mass m will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R, and the ball has radius r

    asked by M
  19. chemistry

    A 30.00mL sample of a clear saturated solution of PbI2 requires 14.7mL of a certain AgNO3 for its titration. I^-(saturated PbI2)+Ag^+(from AgNO3)--> AgI(s) What is the molarity of this AgNO3? I'm not really sure where to start.

    asked by brad
  20. physics

    a 25.0kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. the coefficient of kinetic friction between the box and the inclined plane is 0.200. determine the force of kinetic friction acting on the

    asked by Anonymous
  21. Physics

    The 3.80 kg cube in Fig. 15-45 has edge lengths d = 5.50 cm and is mounted on an axle through its center. A spring (k = 1300 N/m) connects the cube's upper corner to a rigid wall. Initially the spring is at its rest length. If the cube is rotated 2.00°

    asked by Anna
  22. physics

    A train is rounding a circular curve whose radius is 1.87E+2 m. At one instant, the train has an angular acceleration of 1.51E-3 rad/s2 and an angular speed of 0.0470 rad/s. Find the magnitude of the total acceleration (centripetal plus tangential) of the

    asked by Katie
  23. Physics

    In the railroad freight yard, an empty freight car of mass m rolls along a straight level track at 1.1 m/s and collides with an initially stationary, fully loaded boxcar of mass 4.3m. The two cars couple together upon collision. (a) What is the speed of

    asked by Priyanka
  24. Physics

    A physical pendulum consists of 3.8 m long sticks joined together as shown in Fig. 15-41. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick? Who can help me with this problem?

    asked by Anna
  25. chemistry

    which solution has highest freezing point if all are at the same molality calcium chloride sodium nitrate potassium sulfate iron(III) nitrate all have same freezing point please explain

    asked by kim
  26. Physics

    A physical pendulum consists of 3.8 m long sticks joined together as shown in Fig. 15-41. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick? Who can help me with this problem?

    asked by Anna
  27. statistics

    If you want to be 95% confident of estimating the population proportion to within a sampling error of and there is historical evidence that the population proportion is approximately 0.40, what sample size is needed?

    asked by Johniece McCoy
  28. chemistry

    Calculate the number of grams of h2c2o4.2h2o needed to prepare exactly 250mL of a 0.200 N solution of the acid?

    asked by Jess
  29. Chemistry

    How many liters of gaseous carbon monoxide at 27 Celsius and 0.247 atm can be produced from the burning of 65.5 g of carbon according to the following equation? 2C+O2 ->2CO The answer i got was 1096.88 L CO But it has to be 544 L CO How do you get 544???

    asked by Anonymous
  30. Algebra 2

    (5y+5)/(y^2^+7y+6)*(y^2^+4y-12)/(y^2^+3y-10) Simplify Leave answer in factored form. Keep () around binomial factors.

    asked by Nancy
  31. physics

    The system shown below consists of a block of mass M = 4.4 kg resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging block of mass m = 1.9 kg. The

    asked by Nick
  32. physics

    Suppose the spring in this spring-powered rifle has a spring constant of k = 1,000 N/m. How much work can it do in accelerating the projectile, if it is compressed by x = 0.10 m?

    asked by christina
  33. calc

    consider the function f(x)=x^3 - x^2 - 3x -2. find the average slope of this function on the interval (-2,3). by the mean value theorem, we know there exists a c in the open interval (-2,3) such that f'(c) is equal to this mean slope. find the two values

    asked by matt
  34. Physics

    Figure a is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.75 rad/s; figure b is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs = 2.50 cm

    asked by Anna
  35. AP Language

    What is Tan’s strategy behind including a direct quotation from her mother (paragraph 6) rather than paraphrasing what she said?

    asked by Needhelp500
  36. maths

    bus tickets cost $3 for an adult and $2 for a child. there are 'a' adults nd 'c' children on a bus. the total number of people on the bus is 52. the total cost of the 52 tickets is $139. find the number of children on the bus.

    asked by preeti
  37. physics

    A race car, starting from rest, travels around a circular turn of radius 20.8 m. At a certain instant, the car is still accelerating, and its angular speed is 0.515 rad/s. At this time, the total acceleration (centripetal plus tangential) makes an angle of

    asked by Katie
  38. Chemistry

    Calculate whether or not a precipitate will form if 1.30 mL of 0.80 M NH3 are added to 2.2 L of 1.0 10-3 M FeSO4. Calculate Q.

    asked by Tanya
  39. physics

    A ball of radius 0.211 m rolls along a horizontal table top with a constant linear speed of 3.41 m/s. The ball rolls off the edge and falls a vertical distance of 2.27 m before hitting the floor. What is the angular displacement of the ball while the ball

    asked by Katie
  40. calculus

    Consider the function f(x)=3x^2 – 5x on the interval [-4,4]. Find the average slope of the function on this interval. By the mean value theorem, we know there exists at least one c in the open interval (-4,4) such that f’(c) is equal to this mean

    asked by john
  41. Physics

    A roller coaster reaches the top of the steepest hill with a speed of 3.0 km/h . It then descends the hill, which is at an average angle of 40 degrees and is 50.0 m long. Estimate its speed when it reaches the bottom. Assume kinetic friction (uk) = 0.18.

    asked by KRIS
  42. Math-Probability

    An urn contains four red balls and three white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?

    asked by Emma
  43. kinetics

    a ball of mass 200 g is thrown vertically upwards with a velocity of 20ms-1 ignoring air resistance. a) calculate the kinetic energy of the ball as it is released b)calculate the maximum height reached by the ball c) state the velocity of the ball when it

    asked by dmkp
  44. Physics

    A roller coaster reaches the top of the steepest hill with a speed of 3.0 km/h . It then descends the hill, which is at an average angle of 40 degrees and is 50.0 m long. Estimate its speed when it reaches the bottom. Assume kinetic friction (uk) = 0.18.

    asked by KRIS
  45. psychology

    Any situation that involves learning a)requires some relatively permanent change to occur b)requires a great deal of effort. c)involves conscious determination d)is relatively automatic I'm working on my assignment and I am stuck on this question. I think

    asked by love4965
  46. statistics

    it has been reported that 40% of all internet users have been attacked by viruses. If 20 people are randomly surveyed, find the following probabilities: a. At least 3 have been attacked b. No more than 5 have been attacked c. less than 15 have been

    asked by Jane
  47. Chemistry

    Use Hess's law to calculate the enthalpy change for the reaction: 3C(s) + 3H2(g) ¡æ C3H6(g) Given the following thermochemical equations: 2C3H6(g) + 9O2(g) ¡æ 6CO2(g) + 6H2O(l) ¥ÄH = -4116.0 kJ/mol C(s) + O2(g) ¡æ CO2(g) ¥ÄH = -393.51 kJ/mol

    asked by Hailee
  48. social studies

    what is one important difference between the koreas and japan 1)korea has may mountains 2)japan is not crowded but korea is 3)the korean peninsula is on stable ground 4)koreas mineral resources are used and japans are not

    asked by sierra
  49. Music

    Working on a worksheet regarding triads and figured bass. the directions say Observe the key sig. and it is in bass clef the key of D Major and it has an F as the figured bass and a # what does that mean

    asked by Vanessa
  50. calc

    by applying rolle's theorem, check whether it is possible that the function f(x) = x^5 + x -17 has two real roots. your reason is that if f(x) has two real roots then by rolle's theorem, f'(x) must be equal to what at certain value of x between these two

    asked by don
  51. math-probability

    A factory produces fuses, which are packaged in boxes of 17. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of these three fuses is defective. What is the probability that a box containing two defective

    asked by Emma
  52. Algebra

    How to find dimensions of a field when given length of fencing and area? Hi I really appreciate your help on this. The question states that I have a field of area 650 square metres and fencing of 110 metres. I must give 3 possible sets of dimensions of the

    asked by Bernadette
  53. Chemistry

    A buffer containing 0.2832 M of acid, HA, and 0.1504 M of its conjugate base, A−, has a pH of 2.36. What is the pH after 0.0015 mol NaOH is added to 0.5000 L of this solution?

    asked by Tracey
  54. Political Science/Media

    which of the following news sources typically provides the LEAST depth while covering topics? a) television b) magazines c) radio d) the Internet e) newpapers

    asked by tina
  55. kinetics

    An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius

    asked by dmkp
  56. PHYSICS

    :A baseball is hit with a speed of 30.0 at an angle of 50.0. It lands on the flat roof of a 10.0 -tall nearby building

    asked by WAEL
  57. psychology

    Which of the following is an example of an innate UCS-UCR connection? sneezing in response to pepper a temper tantrum raising your hand before asking a question in a classroom setting learning to ride a bike by watching your older brother doing so

    asked by Venessa
  58. Finite Math

    help me this is the one problem I just cannot seem to figure out!! Without consultation, each of five organizations announces a one-day convention to be held during July. Find the probability that at least two organizations specify the same day for their

    asked by Amanda
  59. Algebra 1B--

    Solve the following system of inequalities by graphing. 5x - 4y ≥ -20 3x - 2y ≤ -8 y ≥ -3 I need help, like a website or steps on how to do this. I don't get it, at all.

    asked by Carson Joy
  60. physics

    Block A (mass = 3 kg), moving at 10 meters per second, collides with stationary Block B (mass = 5 kg). If the collision is inelastic, what will be the final speed of the connected blocks?

    asked by nana
  61. Chemistry

    The solubility of Mg(OH)2 in a particular buffer solution is 0.63g/L .What must be the pH of the buffer solution? I am unsure of where to start since this is the first solubility problem that I've done that has included the density.

    asked by Arianna
  62. physics

    A lunch tray is being held in one hand, as the figure below illustrates. The mass of the tray itself is 0.182 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.08 kg plate of food and a 0.279 kg cup of coffee. Assume L1

    asked by Katie
  63. math-Probability

    In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and the probability of having both types of defects is 0.01. Find the probability of having neither type of defect.

    asked by Emma
  64. statistics

    the average temp of the lake is 64.2 degrees and the standard deviation is 3.2. Assume the cariable is normally distributed. For a randomly selected day find the probabliity that the temp will be above 62 degrees

    asked by carson
  65. Physics

    For no apparent reason, a poodle is running counter-clockwise at a constant speed of 3.00 m/s in a circle with radius 2.9. Let v_1 be the velocity vector at time t_1, and let v_2 be the velocity vector at time t_2. Consider \Delta v = v_2-v_1 and \Delta t

    asked by Krista
  66. Finance

    Cost Allocation It started with a letter Statendam, November 5, 2001 To: Henk Jacobs, director finance department From: Bob Jansen, manager refuse collection department Dear Henk, Someone told me that you had to see the teachers of one or your children

    asked by Math dummy
  67. math

    what distance formula would you use to solve this problem? A boat starts at point A, moves 3 km due north, then 2km due east, then 1 km due south, and 4km due east to point B. Find the distance AB.

    asked by trey
  68. kinetics

    a stationary car is hit from behind by another car travelling at 40km per hr. After collision both cars remain locked together. The masses of the stationary car and the moving car are 1500kg and 1300kg respectively (use g=9.8ms-2) a) is this an elastic or

    asked by dmkp
  69. To Tonya - re English

    I have removed your post because you included personally identifying information, which is not a safe thing to do online. I've saved the text of your paper in a Word file, though. I'll get back to you soon.

    asked by Writeacher
  70. math

    Find the locus of points equidistant from two straight lines y-5=0 and y-3=0

    asked by Enyongama
  71. Probability of Events

    Three groups announce a one-day convention to be held in June. What is the probability that at least two organizations choose the same day for their convention?

    asked by Logan235
  72. math-Probability

    Without consultation, each of four organizations announces a one-day convention to be held during July. Find the probability that at least two organizations specify the same day for their convention.

    asked by Emma
  73. accounting

    The predetermined overhead rate for manufacturing overhead for 2008 is $4.00 per direct labor hour. Employees are expected to earn $5.00 per hour and the company is planning on paying its employees $100,000 during the year. However, only 75% of the

    asked by jessica
  74. Chemistry

    Hi Dr. Bob, I am quite stumped on how to figure out when chemical equations have a REACTION or NO REACTION. I have read the material in my textbook and even took out a chemistry books for the "Utterly Confused" to try to figure this out. Example: Zn(s) +

    asked by Julie
  75. College Physics

    A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. Just wondering how to

    asked by Angela
  76. Physics

    A pole-vaulter of mass 59.9 kg vaults to a height of 5.9 m before dropping to thick padding placed below to cushion her fall. (a) Find the speed with which she lands. m/s (b) If the padding brings her to a stop in a time of 0.48 s, what is the average

    asked by Priyanka
  77. Algebra

    evaluate the function f(r)= sqrt25-r-6 at the given values of independent variables f(16), f(-x), f(25-2x) and simplify

    asked by Melanie
  78. math

    If you are calculating surface area of a right circular cone topped with a hemisphere. the radius is 4 cm and the rt angle is 8 cm...what is the lateral surface area. Is it 8.94 or is it 9? Explain answer please. Thanks

    asked by trey
  79. chemistry

    which of the following chemical substances would you expect to exhibit the greatest degree of hydrogen bonding? A. ethanol B.propanol C. methanol D. butanol

    asked by jessica
  80. Dynamics

    A 3kg. package slide down a smooth 30 degrees incline and land on a 10 kg. cart that is at rest.Determine the velocity of the cart and the package immediately after the box land on the cart. The package is released from rest 5m up the incline.

    asked by Jerlyn
  81. Basic Calculus-Optimization Problems

    Hello, please help me. There is a question where I have to optimize the area of a field that is being fence in like this: [|] i.e. two rectangle fields, side by side: area= 2x by y. I get to use 200ft of fencing. From that diagram and the amount of fencing

    asked by mary
  82. Math

    a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification.

    asked by Devin
  83. Math-Probability

    Michael is one of eight contestants entered in three races to be run on a eight-lane track. If in each race the runners are assigned to the lanes at random, what is the probability that Michael will be assigned to the inside lane at least once?

    asked by Emma
  84. kinetics

    a stationary car is hit from behind by another car travelling at 40km per hr. After collision both cars remain locked together. The masses of the stationary car and the moving car are 1500kg and 1300kg respectively (use g=9.8ms-2) a) is this an elastic or

    asked by dmkp
  85. Calculus

    a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification

    asked by Devin
  86. college math

    Let p represent the statement, "Jim plays football", and let q represent "Michael plays basketball". Convert the compound statements into symbols.

    asked by Anonymous
  87. math-probability

    Eleven white socks and six red socks are in a drawer. If two socks are selected at random, what is the probability that both socks are the same color?

    asked by Emma
  88. Microeconomics

    Suppose that two people, Michelle and James each live alone in an isolated region. They each have the same resources available, and they grow potatoes and raise chickens. If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds

    asked by Lee Mitchell
  89. chemistry

    What is the concentration of NaOH? using this solution (0.04756 M (i think its stand for Molarity) H2SO4) what is the concentration of NaOH in 10.00 ml of a solution, titrate to an end point using 24.22 ml of acid? formula that was given is (H2SO4 + 2NaOH

    asked by star
  90. physics

    An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2)

    asked by swapnali
  91. computer packages

    describe the following in not less than five sentence with examples. (1) rational database (2) schema

    asked by Joanna
  92. Civics

    Which is not a subunit of the Department of Health and Human Services?

    asked by Derrick
  93. Chemisty

    If 59.0 mL of 0.40 M HI is mixed with 100. mL of 0.10 M KOH what is the resulting pH?

    asked by Tracey
  94. Geometry

    Is a rectangle always a rhombus? Please explain why.

    asked by Anonymous
  95. accounting

    Discuss in 200 to 300 words, each of the four financial statements. Explain the different components of the statements as well as what the statements tell about a business.

    asked by Mary
  96. Physics

    Suppose that a 14-m tall platform has a ramp that is 98 m long. If a box needs 245 N of force of lift it, how many N of force is required to push it up the ramp?

    asked by Alex
  97. Ms.Sue

    I've changed my persuasive topic from Water cons. to Poverty in Kalamazoo. Do you know of any organizations that help the poverty in Kalamazoo? So far I've only found Loaves and Fishes.

    asked by help
  98. Cemistry

    Hi, I've been trying to solve this chemical equation for the last 30 minutes and am only confusing myself. I am wondering if the product I obtained is correct. The question is to write a balanced equation for the below reaction and be sure to indicate the

    asked by Julie
  99. geography

    1. What hemisphere, the Northern or Southern, has the most land? The Northern 2. What gulf is located south of the intersection of 50 degrees E longitude and 30 degrees N latitude? The Persian Gulf 3. Which state capital is north of 40 degrees N latitude:

    asked by Reed
  100. physics

    Calculate the Coriolis acceleration of an aeroplane flying along the equator due east at a speed of 300m s−1.

    asked by swapnali
  101. math-Probability

    In a classroom of children (10 boys and 8 girls), six students are chosen to go to the blackboard. What is the probability that no boys are chosen?

    asked by Emma
  102. chemistry

    What is the molarity of 100 ml of ethanol dissolved in 1.5 liters of water? Ethanol has a specific gravity of 0.789, and its molecular weight is 46 g/mol.

    asked by Louise
  103. chemistry

    complete KH2PO4(aq)+KOH(aq)

    asked by jeff
  104. Political Science/Media

    True or False Because of their dependence of government sources, the news media are unable to set the agenda of debate.

    asked by tina
  105. strength of mechanics

    Determine the midspan value of EI(shear stress) for the beam w/c carries a uniformly varying load over part of the span.

    asked by Jerlyn
  106. chemistry

    Lab report of cations and anions by there precipitate form

    asked by simanda
  107. Algebra

    Write using set builder notation.Show work....Solve..-2(10x-9)-17x

    asked by sherry
  108. Algebra

    Simplify...Show work...-b+bc-c^3-(c^3+bc-c^3+b)

    asked by sherry
  109. health class

    how do you convince someone to stop smoking. Also,how do you relieve stress without smoking or eating? Please help.

    asked by Alexander
  110. math-Probability

    Let E and F be events such that the following is true. Pr (E) = 0.26, Pr (F ' ) = 0.61, Pr (E F) = 0.61 What is Pr (E ∩ F)?

    asked by Emma
  111. chemistry

    a pitcher baseball moves at 44 M/s . It has 150 J of kinetic energy on its way to the catcher. What is the baseball 's mass?

    asked by maria
  112. significant figures

    How many significant figures are in 0.8333

    asked by ******tasha******
  113. science

    Why is it sometimes difficult to make connections between poor water quality and health issues? Among ocean industries, which are the THREE most important branches, economically? compare and contrast persistent and non-persistent pollutants. Explain why

    asked by Anonymous
  114. chemistry

    i need a conclusion for experimenting a tin oxide compound my result for the emperical formula of compound is 2 which will be SnO2

    asked by precious
  115. algebra

    You run 6 miles in one hour and 12 miles in two hours.

    asked by Anonymous
  116. Chemistry

    Which of the following substances has a ∆H°f equal to zero? I2(g) Tin(s, gray) F2(g) NaCl(s) Tin(s, white) Thank you

    asked by Heena
  117. English

    Writeacher, could you please check these examples? Thank you. 1) 'm glad you moved into a new house. I'm pleased you moved house. We were having dinner when the lights went off/out. We didn't 2) What kind of approach can a person have to work? He can work

    asked by Matthew
  118. English

    I left out a sentence. He didn't let on the secret to anyone.

    asked by Matthew
  119. calculus

    A period of time is measured as 362 seconds correct to the nearest second.find:the absolute error,

    asked by Kambuou
  120. political science/media

    most local newspapers get their national news from... a) government reports, press brieefings, and announcements b) interviews with politicians c) local reporters d) wire services e) the Internet

    asked by tina
  121. english

    The subject of this unit is the role of those mythologies which determine the meaning of being male or female in American culture. As always, your aim as a writer is to incorporate what the critics have been arguing into your own thinking, thereby to enter

    asked by Katie
  122. Math

    A car manufacturer has 96 cars to paint. Each batch of paint can paint 12 cars. Which equation can be used to find b, how many batches of paint the manufacturer needs to paint all the cars? f) b/12 = 96 g) b/96 = 12 h) 12/b = 96 i) 96/b = 12

    asked by Mia
  123. pre-calculus

    PD= 600(0.978)^t PD is decreasing at 2.2% per year. How did they get 2.2%

    asked by luckybee
  124. English

    Is "this" an adjective or determiner if you are doing a syntax tree diagram branching out from a NP? I will surely leave this job without a penny in my pocket. Is "without" a preposition?

    asked by Matt
  125. algebra

    5a/2x + 7/10

    asked by Bee
  126. Calculus

    Let f(x) = x*sin(5.8/x), x not equal to Zero and f(x) = L, x = Zero. Find the value of L so that f(x) is continuous at Zero. Thanks!!

    asked by Anonymous
  127. Math

    Express in logarithmic form: y=27(1/3)^2x

    asked by Jenny
  128. Math

    Express in exponential form: -3log5(z)-x^2=2x+1

    asked by Jenny
  129. physics

    The following objects are released from rest and allowed to roll down an inclined plane. Rank the objects by the order of which they will arrive at the bottom of the incline. (1 = the first to arrive, 2 = the second, etc.) I = 2611 kg*m^2, M = 50 kg, R =

    asked by Katie
  130. math

    there are c cars in parking lot then 7 more cars drive in to the lot how many cars in the lot now? write an expression.

    asked by niyant
  131. algebra

    write the slope intercept equation for the line with the given slope that contains the given points....M=-3/4;(0,5)..Show work

    asked by sherry
  132. college math

    construct a truth table for (p ^ q) ~q and submit it to the dropbox

    asked by Anonymous
  133. Algebra

    Write the slope intercept form of the equation of the line,and graph it .Show work...(-3,-5)(6,1)

    asked by sherry
  134. Fitness and Nutrition

    The body can use glycogen as an energy source when aerobic exercise lasts

    asked by Delrick
  135. math

    how many inches high is the box that holds 700 cubic inches?

    asked by brandon
  136. statistics

    create a survey results that have a sample proportion of 23%

    asked by douglas
  137. PreCalculus

    x^2-2x+3y-8 Find the vertex and axis of symmetry.

    asked by Jessenia
  138. chemistry

    please give me an example of a nanocomposite material

    asked by sara
  139. American Literature

    Hey! Can anyone give a good suggestion on a research topic.

    asked by help
  140. Algebra

    Simplify....8-5/8+1/2*6/9=

    asked by sherry
  141. math

    what is 800 as a percentage of 1400

    asked by frank
  142. statistics

    mean=80 v=40

    asked by Anonymous
  143. chemistry

    what volume (in liters)of 0.050 MNaOH can be prepared from 500.mL of 0.35 MNaOH?

    asked by sandra
  144. Chemistry

    What volume of 0.867 M solution is required to make 3.50 L of a solution with pH of 12.5?

    asked by stephanie
  145. math

    find a to the nearest tenth if a= 36 degrees and c=113.5

    asked by laura