Questions Asked on
July 2, 2013

  1. Calculus

    sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. of the sand is falling at the rate of 10 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 5 feet

    asked by Inkiena
  2. Chemistry

    H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g)  2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the

    asked by Kayla
  3. Physics

    A "rocket car" is launched along a long straight track at t=0s. It moves with constant acceleration a1=3.0m/s^2. At t=2.5s, a second car is launched with constant acceleration a2=9.0m/s^2. 1. At what time does the second car catch up with the first one? 2.

    asked by Anonymous
  4. chemistry

    Barium carbonate and nitric acid: BaCO3 (s) + 2HNO3 (aq.) --> Ba2+ (aq.) + 2(NO3-) (aq.) + CO2 (g) + H2O (l) If 25.0mLs of 0.150M nitric acid was used, how many grams of barium carbonate would be required for complete reaction?

    asked by Jill
  5. Statistics

    Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn’t own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to

    asked by Ethel
  6. Gen. physics

    A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of +6.4 m/s and a constant acceleration due to the fan. The direction to the right is positive.

    asked by ODU
  7. Chem

    When 1.0 grams of gasoline burns, 11500 calories of heat energy are given off. If the density of gasoline is 0.66 g/ml , how many kilocalories of energy are obtained from 1.5 gallons of gasoline?

    asked by Anonymous
  8. Math

    Use the formula to solve the problems. B × In The amount that results when $6,000 is compounded at 7% annually over eight years=____ The interest earned in this case= ___

    asked by Desiree
  9. Chemistry

    Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H° = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction

    asked by Jessica
  10. Physics

    A solid sphere rolls without slipping from rest down a plane at 4.00m long inclined at an angle of 42 degrees with respect to the horizontal as shown in the figure below. Determine the speed at the bottom of the incline.

    asked by jake
  11. algebra

    How do you factor the difference of two squares? How do you factor the perfect square trinomial? How do you factor the sum and difference of two cubes? Which of these three makes the most sense to you? Explain why.

    asked by Anonymous
  12. gen physics

    Vector A has a magnitude of 71 units and points due west, while vector B has the same magnitude and points due south. Find the magnitude and direction of (a) A + B and (b) A - B . Specify the directions relative to due west.

    asked by ODU
  13. Math

    A swimming pool is 0.6m deep, 1.8m, 2m long. A. What is the volume of the pool in cubic meters? B. How many liters of water can the pool hold? C. What is the weight of the water in kilograms?

    asked by Ayden
  14. Stats

    I roll a pair of fair dice and compute the number of spots on the two sides facing up. Denote this total by X. The probability distribution of X is X Prob 2 1/36 3 2/36 4 3/36 5 4/36 6 5/36 7 6/36 8 5/36 9 4/36 10 3/36 11 2/36 12 1/36 The probability that

    asked by MT
  15. Chemistry

    If 0.5000grams of barium carbonate was reacted with 25.0mLs of 0.15M nitric acid and the gas then collected in 100mL flask at 77°C, what is the gas pressure in the flask?

    asked by Jessica
  16. chemistry

    . Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained as a reaction between A. a nonmetal and a metal. B. a

    asked by smith
  17. Psychology- the Science of the Mind

    A reflex, like automatically removing your hand from a hot stove, involves pain message sent to the spinal cord by___neurons, while the movement of your hands is controlled by____ neurons. A. somatic ;sensory B. sensory; motor C. motor; sensory D. somatic;

    asked by DJ
  18. Math

    the function is h(t)= -4.9t^2+2t+45 (t represents time in seconds and h represents height in metres.) a) how tall is the building? b) how long does it take the balloon to fall on the sidewalk? c)determine the max height of balloon

    asked by Vieanna
  19. Chemistry

    Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H° = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction

    asked by Kayla
  20. Statistics

    In a recent year, Delaware had the highest per capita annual income with $51,803. If o=$4850, find the mean X that falls at the 95th percentile for a sample of 35 residents.

    asked by Amy
  21. Trig

    Determine the number of triangles with the given parts. b=24 c=29 B=40deg I got 1

    asked by Helay
  22. math

    the temperature at 12 noon was 10 degree Celsius above 0.decrease at the rate of 2 degree Celsius per hour until midnight at what time would temperature be 8 degree Celsius below zero? what would be temperature at mid-night?

    asked by dev
  23. Geography

    Which of the following global religions arose in India? A. Buddhism B. Jainism C. Hinduism D. Sikhism

    asked by Anonymous
  24. School

    What are schools that specialize in your needs? How do they specialize in religion, coed, non-coed, sports, music?

    asked by Adria
  25. social question

    how much gas do you use to travel 172 miles at 4.00 a gallon.

    asked by brian
  26. social question

    how much gas do you use to travel 172 miles at 4.00 a gallon.

    asked by brian
  27. Calculus-HELP!!!!

    Show that the function y=c_1 e^x cos(x)+ c_2 e^x sin(x) satisfies the differential equation y''-2y'+2y=0 for any values of c1 and c2, then find the values for those constants that solve the initial value problem y(0)= 1, y'(0)= -1

    asked by Elyse
  28. financial management

    Tribke Enterprises collected the following data from its financial reports for 2012: Stock price $18.37 Inventory balance $300,000 Expenses (excluding COGS) $1,120,000 Shares outstanding 290,000 Average issue price of shares $5.00 Gross margin % 40%

    asked by Anonymous
  29. gen physics

    A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.71 m/s. The car is a distance d away. The bear is 30.0 m behind the tourist and running at 4.49 m/s. The tourist reaches the car safely. What is the

    asked by ODU
  30. gen physics

    (a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 8.02 m/s when going down a slope for 4.28 s? (b) How far does the skier travel in this time?

    asked by ODU
  31. physics

    A dynamite blast at a quarry launches a rock straight upward, and 2.2 s later it is rising at a rate of 17 m/s. Assuming air resistance has no effect on the rock, calculate its speed (a) at launch and (b)4.4 s after launch.

    asked by justin
  32. math compound interestt

    calcualte the compound amount afterr 5 years for an investment of $7,700 at 6% interest compounded quarterly

    asked by angela
  33. business math

    What is the amount of compound interest for the investment in previous question

    asked by artyst
  34. Business Math

    What is the annual percentage yield of a $10,000 investment for 1 year at 12% interest compounded monthly? (Round APY to the nearest hundredth.)

    asked by Tee
  35. Calculus

    Show that both functions y1=e^(-2x) and y2=xe^(-2x) are solutions to the differential equation y^''+4y^'+4y=0

    asked by Sara
  36. chemistry about buret

    In the experiment of buret calibration, what is the importance of having total buret correction? And does the density of the water at a specific temperature affect this corrections?

    asked by xavier
  37. statistics

    how to caculate using a ruler to measure the thickness of a 25 pages in a textbook

    asked by Diana
  38. statistics

    how to caculate using a ruler to measure the thickness of a 25 pages in a textbook

    asked by Diana
  39. math

    15divided by 1 and 2 3rds

    asked by rajean
  40. Pre-cal

    find all solutions of equation in [0, 2pi) 2 (sec x)^2 + (tan x)^2 -3 = 0

    asked by Help
  41. Home Economics

    What is welfare payments or consumers subsidies?

    asked by Thuli
  42. math

    Explain whether the following statement is true or false: “The ordered pair (1,5) is the same as the order pair (5,1).”

    asked by william
  43. probability

    n 1980 (before the era of in-vitro fertilization), there were 3,612,258 births in the United States (according to the U.S. Census Bureau), of which 68,339 births were to twins and 1,337 births were to triplets or more. What was the probability of having

    asked by Karthik
  44. chemistry

    A 5 liter vessel contains 2g of hydrogen and 28g of nitrogen at 27c. Find the total pressure of the mixture?

    asked by mirza
  45. maths

    f(x)=x ^2 +bx+c , b and c real .Find the minimum of (max|f(x)|)for x∈[−10,10]?

    asked by maths
  46. maths

    Find the smallest n such that for any prime p, at least 20 numbers 1,2, ..., n are quadratic residues not modulo p. k is quadratic residue modulo p if there exists an integer j such that j^2 ≡ k (mod p).

    asked by maths
  47. physics

    scientific interpretation of two toy cars having bar magnet on the roof .what happen when close to each other from same and different direction?

    asked by veronica
  48. Ethics and Moral

    Philosophers use the general term "argument" to mean (Points

    asked by Ashford University
  49. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car

    asked by Anonymous
  50. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car

    asked by Anonymous
  51. general physics

    A 13,900 kg truck is moving at 23.5 m/s on a mountain road when the brakes are applied. The brakes FAIL!! Fortunately, the driver sees a deceleration (ouch!) ramp a short distance ahead. This is an incline used by out of control trucks to dissipate their

    asked by ODU
  52. General physics

    A 34.1 kg child rides a Ferris wheel whose diameter is 18.3 m. When the ride is turning at a constant rate, the child’s speed has a constant value of 4.23 m/s. Find the normal force the seat exerts on the child at: a) The top of the ride b) The bottom of

    asked by ODU
  53. Sciences

    A model airplane whose mass is 875 grams flies in a horizontal circle of radius 3.46 m at the end of a string which is at an angle of 10.5o below the horizontal. Find: a) The tension in the string. b) The speed of the airplane. I have answers but I am

    asked by TCC
  54. physics

    A car tavels a distance of 100 m with a constant acceleration and average velocity of 20 m per second .The final velocity acquire D by the car is 25m per second .find the initial velocity and acceleration of car

    asked by spoorthi.p
  55. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car

    asked by Anonymous
  56. trig

    Find all solutions of the equation. Leave answers in trigonometric form. x^5-1024=0 I got 4(cos tehta + i sin tehta), tehta = 0, 2pi/5, 4pi/5, 6pi/5, 8pi/5 is this right

    asked by haley
  57. math

    give the GCF of each set of numbers and monomial 1. 16,60 2. 52,84

    asked by nagisaram mae
  58. intermediate algebra

    i need to write this algabraically and graph: a runner leaves his house and runs for 30 minutes at 8mph, he rests for 5 minutes and then continues to run home at 5mph.

    asked by kimberlee
  59. Trignometry

    solve the triangle. B=77.0deg b=13.95 a=20.6 I got A=38.5deg C=64.5deg c=34.55

    asked by yes
  60. Trignometry

    Write the complex number in the form a=bi √(3)(cos π/3 + isin π/3)

    asked by yes
  61. Math

    The Chicago Art Museum's Renaissance display consists of four hallways bordered around a square courtyard. A single guard is assigned to patrol the four hallways. When the guard starts working, he begins in one of the corners and walks clockwise. When he

    asked by Nick
  62. math

    i am a 4 digit decimal. the sum of my digits is divisible by 4. the square of my tenths equals my hundredths place. my thousandths is one less than my hundredths and equals to my ten thousandths. who am i?

    asked by kich
  63. Physics

    What is the factor of safety of a steel hanger having an ultimate strength of 630.000MPa and supporting a load of 65000.000N. The steel hanger in question has a cross sectional area of 5.300cm. ANS = (Round to 3 decimal places) Load = 65000.000N ultimate

    asked by Danny
  64. Physics

    The Ultimate strength of a round steel rod is 630.000MPa. If a factor of safety of 5.000 is required, what is the maximum permissible load for the rod if it has a diameter of 3.000cm? ANS = kN (Round to 3 decimal places) Safety = 5.000 Rod diameter =

    asked by Danny
  65. Math

    If a man is 8 feet tall. How many meters is he?

    asked by Linda
  66. Math

    Showing all work convert 315m to dam

    asked by Kala
  67. math

    A family took a trip. They spent $90.71 for gasoline, $153.00 on meals, $197.00 on amusements, and $73.38 on miscellaneous expenses. How much did the trip cost? $

    asked by Bria S.
  68. math

    What percent of $9.00 is $0.64? To the nearest tenth = %

    asked by Bria S.
  69. chemistry

    Using the equipment below, explain how to prepare a 0.00052M HCl solution from a reagent bottle containing 0.13M HCl using only the equipment listed below. Note, you may make multiple dilutions, but you are not allowed to combine volumes. For example, if

    asked by Jill
  70. math

    What is the largest integer less than 1000 that can be represented as a^3+b^3+c^3 for some integers a,b,c, such that a+b+c=0.

    asked by anonymous
  71. government

    What is the current status of campaign finance reform?

    asked by angela
  72. phy

    an ungraduated mercury thermometer attached to a millimeter scale reads 22.8mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is 20

    asked by kate
  73. literature

    in the call of the wild what valiant, tragic figure among the dog must finally be put down for the good of the lives of the team

    asked by Anonymous
  74. phy

    if a force of 80N extends a spring of natural length 8m by 0.4m what will be the length of the spring when the applied force 100N

    asked by ikye
  75. statistics

    population mean of 110 and SD of 6, what is likelihood of having score of 100 0r lower

    asked by carole
  76. Psychology

    The amygdala has only a few seconds to determine if an event is dangerous or not and make an initial decision for approach or withdrawal. Upon further appraisal, the _________can override the amygdala's decision and change the course of the person's

    asked by Anonymous
  77. Stats

    The incomes in a certain lg. population of college teachers have a normal distribution with a mean of $35,000 and st. dev. of $5000. Four teachers are randomly selected. What is the probability their average salary will exceed $40,000?

    asked by MT
  78. Chemistry

    a cube of metal has a mass of 1.45 kg. when the metal is placed into a graduated cylinder containing 356mL of water, the volume increases to 898 mL. calculate the density of the metal in g/mL

    asked by Colby
  79. Health Care Communication

    Compare the similarities and differences of the principles of communication you learned in Week One with the major components of health communication you learned in Week Eight. What observations do you have from your comparison? Include a list of the

    asked by Purple
  80. Health Care communication

    Compare the similarities and differences of the principles of communication with the major components of health communication. What observations do you have from your comparison? Include a list of the principles of communication and the major components of

    asked by Purple
  81. Precalculus

    A 28 foot ladder just reaches the top of a building and forms an angle at 44. 4 degrees with the wall of the building. How many feet is the building tall?

    asked by Jeanette
  82. Physics

    A steel bar has a rectangular cross section measuring 1.000cm by 2.900cm and is 8.700m in length. A load of 189000.00N causes the bar to extend 1.500mm. Calculate the stress and strain produced. ANS 1 = kPa (3 decimal places) ANS 2 = (6 decimal places)

    asked by Danny
  83. Physics

    A uniform bar 1.000 meters in length and having a cross sectional area of 10.000cm^2 is subjected to a loading of 5750.000 Newtons. This load causes an extension to the bar length of 2.740mm. Calculate the stress and the strain produced. ANS 1 = kPa (Round

    asked by Danny
  84. Physics

    The Ultimate strength of a round steel rod is 630.000MPa. If a factor of safety of 5.000 is required, what is the maximum permissible load for the rod if it has a diameter of 3.000cm? ANS = kN (Round to 3 decimal places) Safety = 5.000 Rod diameter =

    asked by Danny
  85. Statistics

    Two dice are tossed. What is the probability that the sum of both dice is a prime number? This is what I have so far Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6,

    asked by Meg
  86. Aftercare school curriculum

    Most common early childhood program in the united states

    asked by Ann
  87. Math

    An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour? a. t-1 b. d/t-1 c. d/t+1 d. d/t-1 e. d/t+1

    asked by Grace
  88. Chemistry

    If 25.0 mLs of 0.150M nitric acid was used, how many grams of barium carbonate would be required for complete reaction?

    asked by Jessica
  89. Chemistry

    The phrase “the heat absorbed or released by a system undergoing a physical or chemical change at constant pressure” is a. the change in enthalpy of the system. b. the change in internal energy of the system. c. the definition of a state function. d.

    asked by Jessica
  90. curriculum content

    which one of the following schools is specifically intended for gifted and college-prep students ?

    asked by Anonymous
  91. history

    can someone please help me with this question Why do you think Martin Luther King speech begins with a discussion of American History and ends with dreams of a future America

    asked by akana
  92. Physics

    A street lamp weighs 158 N. It is supported equally by two wires that form an angle of 107˚ with each other. What is the tension of each of these wires?

    asked by Lynn
  93. math

    15divided by 1 and 2 3rds

    asked by rajean
  94. gen.chememistry

    a students weighs 1o quaters and finds that their total mass is 56.63 grams . what should she report as the average mass of a quarter based on her data

    asked by oscar
  95. Algebra

    Using the cumulative and/or associative laws to write two equivalent expressions of x(3y)

    asked by Vanessa
  96. algebra

    An airplane climbs at a rate of 66.8 ft per min. It descends at twice the rate it climbs. Assuming it descends at a constant rate, how many ft. Will the airplane descend in 30 min.?

    asked by Brandi
  97. Chemistry

    Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant temperature). What is the total pressure of the system after the valves are opened?

    asked by Kayla
  98. Math

    determine the range of each relation for the domain {-3,-2,-1,0,1,2,3} a) y=-3x+4 b)y=2x^2+5 c)y=1/x-4 d) y=-5(x+1)^2-4

    asked by Vieanna
  99. Statistics

    A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which??? Question 4 options: 1) Type II error 2) Type I

    asked by Anonymous
  100. Chemistry

    Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant tempreature). What is the mole fraction of Argon in the opened system?

    asked by Kayla