Questions Asked on
October 11, 2014


    Write a balanced chemical equation for the reaction of solid vanadium(V)({\rm V}) oxide with hydrogen gas to form solid vanadium(III)({\rm III}) oxide and liquid water.

    asked by GI
  2. Chemistry

    Write the balanced molecular equation for the reaction between lithium phosphate and calcium nitrate.

    asked by Anonymous
  3. science!!

    1) Which of the following correctly states the relationship between hippos and whales? (1 point) A) Whales evolved from hippos. B) Hippos evolved from whales.*** C) Hippos and whales do not share a common ancestor. D) Hippos and whales evolved from a

    asked by Anonymous
  4. Science

    Is air a good radiator, insulator, conductor or convector of heat? If three metal spoons are on a table and each at room temperature, what will happen if they touch?

    asked by Denise
  5. Algebra

    Hector’s service club is raising money by wrapping presents in the mall. The function f(x) = 3x describes the amount of money, in dollars, the club will earn for wrapping x presents. They only have enough wrapping paper to wrap 1000 presents. Describe

    asked by Anonymous

    In Langston Hughes's short story "Gumption," of which kind of narration is the following sentence an example: "'You can't live on gumption,' I said, trying to be practical”? A- third-person omniscient B- second-person C- third-person limited D-

    asked by Alexandria
  7. Algebra word problem

    A parabolic arch has a height of 20 m and a width of 36 m at the base. If the vertex of the parabola is at the top of the arch, at which height above the base is it 18 m wide?

    asked by Ella
  8. Physics

    A ball is tied to the end of a cable of negligible mass. The ball is spun in a circle with a radius 2.00 m making 0.700 revolutions per second. What is the centripetal acceleration of the ball?

    asked by Anonymous
  9. Physics

    a car enters a 300m radius flat curve on a rainy day when the coefficient of static friction is between its tires and the road is .600. What is the maximum speed a car can travel around a curve without sliding.

    asked by Anonymous
  10. chemistry

    An alternative approach to bomb calorimetry is toestablish the heat capacity of the calorimeter, exclusive of the water it contains. The heat absorbed by the water and by the rest of the calorimeter must be calculated separately and then added together. A

    asked by Nancy

    Which best describes the conflict and resolution in "The Glass of Milk"? A- The boy is in conflict with the sailors; he resolves the conflict by leaving his ship. B- The boy is in conflict with the woman at the milk bar; he resolves the conflict by

    asked by Alexandria
  12. physics

    The figure shows a girl and a boy each exerting a force to move a crate horizontally a distance of 13 m at a constant speed. The girl’s applied force is 75 N [22° below the horizontal]. The tension in the rope pulled by the boy is 75 N [32° above the

    asked by Anonymous
  13. statistics

    A population has m = 50. What value of s would make X = 55 a central, representative score in the population?

    asked by Carmen
  14. Algebra 2

    Juan is comparing the cell phone plans shown in the advertisement. Plan A charges a $15 monthly fee plus $0.40 per min. Plan B charges a $30 monthly fee plus $0.25 per min. For what number of minutes of use do the plans cost the same? How much will that

    asked by Victoria
  15. Help

    1. In addition to decreasing the amount of fat in a dish, salsa can also increase the amount of A. calories and cholesterol. B. vitamin C and fiber. C. sodium and cholesterol. D. calcium and phosphorus. B? 2. If an outdoor runner develops a headache, feels

    asked by Sarah
  16. science!! please help me!!

    1)When evolution was first proposed, which of the following was used as evidence to support the idea? (1 point) A)observations of nature*** B)laboratory experiments C)extensive fossil collections D)genetic sequences 2)How did Darwin and Lamarck differ in

    asked by abby
  17. Chemistry

    Assume that you start with 2 mole(s) of magnesium metal, determine: The number of grams of MgO(s) that would be produced in the following reaction (enter your answer with 4 significant figures): Mg(s) + 1/2O2(g) → MgO(s)

    asked by Meechel
  18. Business Law

    With authority, Ganeesh contracts to buy Sam’s farm for Belinda. Because he believes that Sam will raise the price if he finds out that he is representing Belinda, Ganeesh does not tell Sam he is representing anyone. On the day of the closing, neither

    asked by Anonymous
  19. physics

    An airplane whose speed is 150km/hr climbs from a runway at an angle of 20° above the horizontal. What is its altitude two minutes after takeoff? How many kilometers does it travel in a horizontal direction during this two minute period? Find the altitude

    asked by Emily
  20. Math

    Every employee's salary at the Sunrise Software Company increases each year by 1/10 of that person's salary the previous year. A: If Martha's present annual salary is $100,000.00, what will her salary be in 2 years? B: If Aaron's present salary is

    asked by KG
  21. English

    I have to write a 5 paragraph comparison and contrast essay on Agamemnon, Hamlet, and The Love song of J. Alfred Prufrock. When writing this, do I compare all three stories at once in each paragraph as well as their differences in each of the 3 body

    asked by Liz
  22. Chem lab

    Student Calamity reported a final yield of 50%. List four things she might have done wrong to account for this yield. Student Overachiever reported a final yield of 115%. List two things he might have done wrong to account for this yield.

    asked by bill
  23. Math

    If you invested $500 in an account that pays 12 % a compounded weekly, how long would it take for your deposit to triple?

    asked by Lil
  24. CHemistry

    Assuming the final concentration of chloride anion after the addition of HCl (precipitation step) was 0.1M, what is the remaining concentration of Ag+ in the solution? (pKsp for AgCl = 9.74)

    asked by Sophie
  25. Algebra

    A person has 29 1/2 yards of material available to make doll outfits. Each outfit requires 3/4 yard of material. a: How many outfits can be made? b: How much material will be left over?

    asked by Anon
  26. Help

    5. Which one of the following choices can be added to increase the "creaminess" and nutritional value of soups without adding fat? A. Creamed corn B. Pureed root vegetables C. Nonfat milk D. Cornstarch D? 7. Appetite is not linked to A. physiological

    asked by Sarah
  27. Physics 30

    inquiry lab determining the refractive index of a variety of materials (Snell's Law Lab): Basically this lab: We us a polar coordinate paper and a semicircular shaped containers which we switch between, which are composed of different material. We shine a

    asked by Lucy
  28. physics

    Two crewmen pull a boat through a lock, as shown in Figure 5-25. One crewman pulls with a force of F1 = 155 N at an angle of θ = 32° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of

    asked by John
  29. statistics

    A computer is used to randomly select a number between 1 and 2000. Event A is selecting 460.

    asked by Anonymous
  30. math

    Find the percent markup based on selling price, if the percent markup based on the cost is 14%. (Round to the nearest tenth percent.)

    asked by Rochelle
  31. Physics

    A puck of mass 0.165 kg, initially resting on ice, is hit by a stick to gain a speed of 32.0 m/s and then slides 25.0 m to lose 5.00% of its kinetic energy. (a) What is the work done on the puck by the stick? (b) What is the kinetic friction coefficient

    asked by Will
  32. AP Chemistry

    1. If alum is heated at first too strongly causing it to splatter out of the crucible what effect will this have on the determination of the water hydration? 2. If alum is heated insufficiently what effect will this have on the determination of the water

    asked by Nicole
  33. science

    suppose 125g of ethanol at 25C is mixed with 255g of ethanol at 84C at constant atmospheric pressure in a thermally insulated vessel. What is the Ssys for the process. The specific heat capacity for ethanol is 2.42 J/g K. Answer in units of J/K

    asked by benjamin
  34. Physics

    Iam looking for the entire formula on how to solve this. If a person on a 35.0 m diameter Ferris wheel feels 30% heavier at the bottom of the wheel, how fast is it going around? Is N/Mg = 1 + v^2/Rg actual weight

    asked by Iworlock
  35. chemistry

    you have not added enough sodium hydroxide to precipitate all the copper as copper hydroxide. How could you tell that not all the copper had precipitated?

    asked by bill
  36. Algebra 1

    A car is traveling at a rate of 80 kilometers per hour. Set up the equation that would convert the speed to meters per second. Then evaluate

    asked by Adam
  37. english

    in the chapter of the story of keesh what was method of those pepole to coun t age of there children?

    asked by ramneek
  38. calculus

    the surface area of a cube is increased from 24 square centimeters to 26.016 square centimeters . use differentials to determine: (1) by approximately how many centimeters does the side length of the cube increase? (2) by approximately how many cubic

    asked by denial
  39. calculus

    use differentials to determine by approximately how many square centimeters does the area of a square table increase if its diagonal is increased from 4 centimeters to 4.092 centimeters the question is The area of table increases by approximately (??)

    asked by denial
  40. Math (Word Problem)

    An open gift box is to be made from a square piece of material by cutting four-centimeter squares from the corners and turning up the sides. The volume of the finished box is to be 576 cubic centimeters. How to find the size of the original piece of

    asked by Fatima

    The main purpose of the rising action in a short story is to A- give background information about the characters. B- describe the highest action, or turning point, of the story. C- build interest and suspense. D- answer the reader's questions. My choice is

    asked by Alexandria
  42. Math help

    Order the number from least to greatest -44, -8 1/2, 0, 6.2, -12, -6.4, 14, 7, -6

    asked by Gio
  43. HELP!! Algebra

    A student claims that division always makes things smaller so 5 / (1/2) cannot 10 because 10 is greater than the number 5 she started with. How do you respond? I don't understand this question at all!!

    asked by KG
  44. chemistry

    When a metal was exposed to light at a frequency of 3.86× 1015 s–1, electrons were emitted with a kinetic energy of 3.60× 10–19 J. What is the maximum number of electrons that could be ejected from this metal by a burst of light (at some other

    asked by durr
  45. science

    Which of the following causes a hot air balloon to rise? Resistance Conduction Convection Radiation

    asked by Denise
  46. Math College (Algebra)

    How to solve this system? x + [(3x-y)/(x^2+y^2)] = 3 y - [(x+3y)/(x^2+y^2)] = 0

    asked by Frank
  47. Chemistry

    Calculate the fourth ionization energy of beryllium in J atom^-1 & kJ mol^-1 units

    asked by Urvashi
  48. math

    how to write 700+3000+40000+12+80 in standard form

    asked by jeff
  49. Algebra

    Hector’s service club is raising money by wrapping presents in the mall. The function f(x) = 3x describes the amount of money, in dollars, the club will earn for wrapping x presents. They only have enough wrapping paper to wrap 1000 presents. Describe

    asked by Please help
  50. CHemistry

    write the balanced net ionic equation that shows the formation of Fe(OH)3 in the reaction of iron (III) nitrate with sodium hydroxide. Please help

    asked by Anonymous
  51. statistics

    On this semesters final exam, john scored 72 on his calculus exam and 53 on his statistics exam. The z score for both exams was the same. Which on would he do better on? a. calculus b.statistics c. the exam scores are equivalent

    asked by mike
  52. College Algebra

    How to find the values of x,y and z and to show the condition stated below? 2yz + zx − 5xy = 2 yz − zx + 2xy = 1 yz − 2zx + 6xy = 3 Show that xyz = ±6 and find all possible values of x, y and z.

    asked by Darone
  53. physics

    An 80 kg skateboarder going 10 m / s is launched nearly vertically off a ramp as shown. Approximately how high does he go?

    asked by brian
  54. Algebra

    the length of the longer leg of a right triangle is 13 ft more than 3 times the length of the shorter leg. the length of the hypotenuse is 14 ft more than 3 times the length of the shorter leg. Find the side lengths of the triangle

    asked by Jd
  55. Trigonometry

    Use a double-angle formula to rewrite the expression. 6 sin x cos x

    asked by Syndra
  56. Calculus

    The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres Use differentials to determine : (a) by approximately how many centimetres does the side length of the cube increase? (b)by approximately how many centimetres does

    asked by julia
  57. physics

    In a tennis serve, a 0.070 kg ball can be accelerated from rest to 41 m/s over a distance of 0.90 m. Find the magnitude fo the average force exerted by the racket on the ball during the serve. I know it is a force problem, but I am not even sure how to set

    asked by Alex
  58. Algebra 2

    Will you explain how to stretch f(x) = |2x| - 3 horizontally by a factor of 3/2?

    asked by Victoria
  59. Chem

    Review example 5.10 and exercise 5.10. Suppose 1.58 moles of N2 and 0.420 moles of O2 occupy 22.41 L at a total pressure of 2.00 atm. Use XA = to determine the (decimal) mole fractions of both components. Then, use XA = to determine the partial pressures

    asked by Feather
  60. physics

    A meteoroid is speeding through the atmosphere, traveling east at 15.5 km/s while descending at a rate of 10.6 km/s. What is its speed, in km/s?

    asked by lisa
  61. physics

    A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 13.6 m/s at an angle of 43.1° above the horizontal. It rises to its maximum height and then falls down to the green.

    asked by lisa
  62. statistics

    Using the z table what z score would cut off the upper 25% of scores.

    asked by angela
  63. chemistry

    What is the percentage yield of the reaction of 4.9 g isoamyl alcohol with 4.9 g of acetic acid if 3.5 g of isoamyl acetate product is obtained after distillation? Enter your answer, without a % symbol, to 2 sig. figs.

    asked by sparkles
  64. Chemistry

    a 175.0 ml solution is made up of 20.0g of titanium(iii) chloride and H2O. What is it's molarity? I am just trying to check my work. M= 0.1296/0.175 =0.740

    asked by Jessica
  65. Chem

    3Review example 5.7 and exercise 5.7. Suppose there are 2.00 moles of O2 at 1520 mmHg and 27.0 oC. Rearrange the ideal gas law and use it to determine the volume (L) of the gas. Then, find the density by rearranging the equation P(Mm) = dRT. Show all

    asked by Feather
  66. physics

    An object has three component velocities: 5mi/hr toward the east, 12mi/hr toward the south, and 8mi/hr toward the northwest. Find the resultant velocity of the object. For resultant velocity, I got 6mi/hr I don't understand how to find the direction angle

    asked by Emily
  67. physics

    Four forces are acting on an object. Force 1 has a magnitude of 5N at an angle of 70° above the +x-axis; force 2 has a magnitude of 8N at an angle of 35° above the +x-axis; force 3 has a magnitude of 4N at an angle of 20° above the -x-axis; force 4 has

    asked by Emily
  68. chemistry

    A 300mL solution was made by dissolving 5.0g of MgCl2 in water. What is its molarity?

    asked by Anon
  69. ap chem

    an unknown gaseous hydrocarbon reacts with oxygen to form CO2 and H2O, DETERMINE HEAT OF FORMATION FOR THE HYDROCARBON. the density of the mixture of CO2 and H2O at 1 atm and 200 degree celsius is 0.751g /L and heat of reaction is equal to -2044.5 KJ /MOL

    asked by Rita
  70. STATS

    What percentage of the area of the standard normal distribution is between z = -1.00 and z = +1.00? How do you know this?

    asked by Hernandez
  71. statistics

    suppose that the teacher of this class graded solely on a curve - 10% get A, etc. How might this effect students getting into into study groups to prepare homework or tests?

    asked by H
  72. Math help

    Noah says that dividing a number by 2 is the same as multiplying it by 1/2. He wants to know if he is right, and if so, why? How do you respond?

    asked by KG
  73. physics

    suppose the force of 20.0 N pushes on two boxes of unknown mass. We know, however, that the acceleration of the boxes is 1.25 m/s2 and the contact force has a magnitude of 2.73 N. (a) Find the mass of box 1. (b) Find the mass of box 2. So do I subtract the

    asked by Alex
  74. math

    20 LB for $27.50; 12 LB for X dollars. Find x. Can you make it a decimal?

    asked by rob variable
  75. chemistry

    how to do a research paper

    asked by anonymous
  76. statistics

    a) What is the standard deviation of the set of data? b) What raw score will have 15% of the data set above it? c) If I have a raw score of 21 what percentage of the scores, are below my score? 16, 16, 89, 76, 24, 45, 98, 20, 22, 28, 34, 35, 76, 67, 48, 37

    asked by anika
  77. Trigonometry

    Find the exact solutions of the equation in the interval [0, 2π). (cos 2x) - (cos x)=0

    asked by Syndra
  78. research paper

    s my outline for my research paper is this * abstract * introduction: includes the research question, general overview of your paper *scientific and historical perspective of your topic * two or three differing opinions relating to the topic *conclusion

    asked by anonymous
  79. Physics

    A pilot gets into trouble flying 2000m above the pacific ovean. He flies 550 km/h [S 30(degree)W] with a wind from the NW of 100 km/h. he ejects himself at a velocity of 10m/s [upwards]. What is his velocity at the instant he hits the ocean surface?

    asked by John
  80. Physics

    A basketball player makes a jump shot. The 0.580-kg ball is released at a height of 1.90 m above the floor with a speed of 7.18 m/s. The ball goes through the net 3.05 m above the floor at a speed of 4.23 m/s. What is the work done on the ball by air

    asked by Steven
  81. English

    for my homework my teacher asked us to answer this question. "How can we advance educational justice? what is the proper answer to this?

    asked by hola
  82. Physics

    - a 1200 W motor bike can move at a maximum speed of 30.0 m/s . how much force does the motor exert? - what would be the average momentum of 60.0 kg sprinter who finishes 100.0 m in 60 s?

    asked by eleim
  83. Algebra

    how do you solve this problem 3 - q = 15

    asked by Roberta
  84. College Algebra

    How to solve this system? x + [(3x-y)/(x^2+y^2)] = 3 y - [(x+3y)/(x^2+y^2)] = 0

    asked by Francis

    how many grams of glucose, C6H12O6 and water are in 600g of 5.5% by mass glucose solution? please indicate the general formula to use to solve this problem.

    asked by Ej
  86. Trigonometry

    Find the exact solutions of the equation in the interval [0, 2π). (4 sin x)(cos x)=1

    asked by Syndra
  87. english

    in the book "passing" by Nella Larsen, how is each character trapped? I was thinking about writing how they are in a way trapped within themselves, and have internal conflicts. Would that qualify as them being trapped?

    asked by moose
  88. Theology 10

    When have you asked to respond in faith to a situation you did not fully understand?

    asked by Laruen
  89. Chemistry

    How much heat would you need to melt 20.0 L of ice that had frozen on a fruit tree.

    asked by Matt
  90. Algebra 2

    solve each system of equation 3x+5y+2z=4 2x-2y+3z=-4 x+y+z=0 *could you show work because I want to learn how you got this answer

    asked by Alicia
  91. science

    As mentioned before, our asteroid is in the shape of a sphere and has a mass of 2000 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to be 1.2 meters.

    asked by stacy
  92. physics

    a force of 3.00 N acts through a distance of 12 m in the direction of the force. find the work done

    asked by eleim
  93. Biology

    How can erosion effect the carbon cycle?

    asked by A
  94. another math equation

    a b 2 - =- =-, find ab 4 5 3 i'm gonna need supporting onthis

    asked by Help please
  95. College Algebra

    Solve for x in terms of the other symbols: rsx^2 + s^2 x + rtx + st = 0

    asked by Carl
  96. Chemistry

    My lab had done protein crystallography with lysozyme. Two solutions were used to prepare the crystallization: lysosome solution and the precipitate solution. 1) There was a distinct amount of starting material in a well. what would that do to the size of

    asked by Anonymous
  97. math

    how much greater is the volume of a cube whose edge is 5 inches than the volume of a cube whose edge is 4 inches?

    asked by Shohanur
  98. physics

    Assume that a particular crash test expert can withstand 18 times the acceleration due to gravity. Find the shortest distance over which her car can be brought to a stop from a speed of 78 km/h without the acceleration exceeding 18g.

    asked by Issac
  99. Math

    The area, a of a rectangle whos length is twice its width, w is described by the equation, a=(w)(2w)=2w^2

    asked by Coleson
  100. physics

    A 78 kg bag of mortar mix is sitting in the back of a truck rounding a traffic circle of radius 27 m at a speed of 21 km/h. Using the truck's frame of reference, find the force of contact between the bag and the side of the truck. Assume that the floor at

    asked by Lance
  101. math

    How many times do you need to multiply 6.5066 by ten to get 650.66?

    asked by barbie
  102. algebra

    Determine whether the set {[1 4], [-1 6], [3 8]} is a basis of R^2

    asked by Yohan
  103. Help

    Ms.Sue can you check my answers please their down below.

    asked by Sarah
  104. Biology

    What is the location and effect of waves of contraction in the digestive system.

    asked by Michelle
  105. Algebra 2 Answer Check

    Classify each system and determine the number of solutions. {3y = 2x; -4x + 6y = 3 A: inconsistent; no solution

    asked by Victoria
  106. Goverment

    I need to write a research paper relevant to the U.S. government or politics. I would like recent topics, please help.

    asked by kim
  107. math equation

    a b - = - = 3, Find a + b 4 5

    asked by Help please
  108. equation

    lia each take a bicycle trip. Anna rides 20 km 1 1/3 hours. Julia rides 100 meters in 10 minutes. Which rider has the slower unit rate?

    asked by Nina
  109. Chem

    Find the constants (a and b) for O2 in Table 5.7. Use the Van der Waals equation to determine the pressure of 1.000 mole of O2 if the gas occupies 22.50 liters at 27.00 oC. First, find the values for each of the two terms in the equation, then find the

    asked by Feather
  110. Math (Algebraic Proving)

    Show that the equation sqrt((x-c)^2 + y^2)+sqrt((x+c)^2 + y^2) = 2a can be simplified to (x^2/a^2) + (y^2/b^2) = 1 where b^2 = a^2-c^2.

    asked by Airisse
  111. math

    I have a 2x4 that's 8'long,how manyn 1 and 1/2 foot boards can I cut out of it?

    asked by willie
  112. math

    in a isosceles triangle if two equal sides are 3.5 meter long is third side?

    asked by deepak
  113. computer science

    i need help with this problem 32+64(mod18)

    asked by victoria
  114. Algebra, help please!!!

    Solve for x in each of the following: a: 2/3x = 11/6 b: 3/4 / x = 1/3 c: 5/6 - 2/3x = 3/4 d: 2x/3 + 1/4 = x/6 - 1/2 Please help me and explain, I don't get fractions at all!

    asked by Rose
  115. Algebra 2 (Reiny)

    How am I supposed to compress f(x) = |2x| - 3 vertically by a factor of 1/4? Please, will you explain this to me?

    asked by Victoria
  116. math


    asked by Abdul