Questions Asked on
July 27, 2014

  1. Biology

    In an experiment, a researcher counts the number of oxygen bubbles produced by water plants placed under different colors of light. The researcher finds that water plants placed under white light release more oxygen bubbles than water plants placed under

    asked by J
  2. Calculus

    A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep. V=(pi/3)(r^2)h

    asked by Tim
  3. Chemistry

    When normal atmospheric conditions are present, water is constantly being cycled between liquid and gaseous states by which of the following pairs of processes? A. Turgor pressure and filtration B. Melting point and condensation C. Evaporation and

    asked by J
  4. physics

    charge on 500mg of electron

    asked by AYESHA
  5. finance

    Program A has a profit of $5,000 and an investment of $100,000, while program B has a profit of $10,000 and an investment of $220,000. Which program has the better ROI?

    asked by anonymous
  6. Statistics

    Express the confidence interval (0.033,0.099) in the form of P-E

    asked by Nina
  7. Biology

    Which of the following will happen if mRNA fails to be translated? A The cell's nucleus will produce more chromatin. B. Ribosomes will not be able to create protein. C. Mitochondria will release ATP. D. The cell will produce more mRNA I think it's B

    asked by J
  8. chemistry

    1-Dinitrogen tetroxide (N2O4) dissociates according to the equation: N2O4 ⇌ 2NO2 An equilibrium reaction mixture at 25 ºC was found to have the partial pressure of N2O4 as 72 kPa whilst the partial pressure of nitrogen dioxide (NO2) was 29 kPa.

    asked by John
  9. science

    In an experiment to determine the solubility of lead chloride (PbCl2), 5.6g of (NH4)2SO4 was added to a 250ml solution containing an unknown amount of dissolved lead chloride (PbCl2) resulting in the formation of Lead sulfate precipitate. The mass of the

    asked by nelo
  10. PHI 208 final exam

    1. According to the video “Religion, War, and Violence,” Just War Theory asserts that military intervention 2. According to Glaucon, justice is based on 3. What is palliative care? 4. According to Tom Regan, what is fundamentally wrong with our current

    asked by Douglas
  11. statistics

    The distribution of students’ heights in a class of 100 students is normal, with a mean height of 66 inches and a standard deviation of three. With these parameters, answer the associated question(s). The shortest 10% of the class is equal to or shorter

    asked by Mireya
  12. finance

    Your firm is considering the following three alternative bank loans for $1,000,000: a) 10 percent loan paid at year end with no compensating balance b) 9 percent loan paid at year end with a 20 percent compensating balance c) 6 percent loan that is

    asked by Anonymous
  13. finance

    St. Luke’s Convalescent Center has $200,000 in surplus funds that it wishes to invest in marketable securities. If transaction costs to buy and sell the securities are $2,200 and the securities will be held for three months, what required annual yield

    asked by Anonymous
  14. CRJ

    Which of the following is a "tendency to behave in certain ways in certain circumstances?" Question 5 options: Character trait Virtue Vice All of the above

    asked by Wendy
  15. Math

    Kevin and Rob are standing on opposite sides of Edmonton's River Valley. In order to see a boat on the river, Kevin has to look down 32°, and Rob has to look down 38°. The width of the valley is 750m, and the boat is exactly between Kevin and Rob. How

    asked by Whitney
  16. Maths

    A ladder of length 6 m leans against a vertical wall so that the base of ladder is 2m from the wall. calculate the angle between the ladder and the wall.

    asked by faisal
  17. english

    Identify the verbal in this sentence as infinitive, gerund or participle. Wearing protective clothing is a good precaution against infection.

    asked by angie
  18. math

    A box contains 4 red cards, 6 blue cards, and 10 green cards. What is the smallest number of cards we must remove from the box to make sure that we have 2 cards of the same color?

    asked by john
  19. Math

    How do I find the points, so that O can graph it. y=1/4x+4

    asked by Natalie
  20. Biology

    Which of the following classes of biomolecules are frequently responsible for bringing about cell differentiation? A Transcription factors B. lnterleukins C. Cytokines D. Nucleotidyl transferases I think it's A

    asked by J
  21. physics

    Fill in blank Increasing the distance between a pair of slits through which light is being shone would ___ the distance between nodal lines appearing on a screen

    asked by Liz
  22. Chemisrt

    What is pre-exponential factor for diffusion, because i have a problem with this equation. D=D0*exp[-Ea/R*T] where D=2*10^-13 Ea=2.9*10^-19 joules/atom T=1009 K How to find the pre-exponential ?

    asked by Musaka
  23. Maths

    The average mass of Ken, David and Kelvin is 42 kg. David is 6 kg heavier than the average mass of Ken and Kelvin. Ken is 6kg heavier than Kelvin. Find David's mass.

    asked by Anonymous
  24. physics

    An ice cube at 0°C measures 14.1 cm on a side. It sits on top of a copper block with a square cross section 14.1 cm on a side and a length of 18.9 cm. The block is partially immersed in a large pool of water at 89.3°C. How long does it take the ice cube

    asked by SUZAN
  25. chemistry check answer

    Question: Explain whether using solid NaOH pellets rather than aqueous NaOH would alter the enthalpy. If different, would it be higher or lower My answer: Would the result be different since the aqueous NaOH would be able to quickly dissolve in water

    asked by Liz
  26. Chemistry

    Why would you subtract the heat of a calorimeter when calculating heat of the reaction? hint: the heat of the calorimeter is the amount of heat that the calorimeter absorbs from the solution-each calorimeter will absorb a certain amount of heat, which

    asked by Liz
  27. english

    Freud believed the purpose of dreams is to

    asked by Mary
  28. SAT

    Suits at a local clothing store are discounted 20%. Despite the discount, the store owner enjoys a net profit (discount price minus cost) equal to 60% of the cost of the suits. If the suits cost the clothing store owner $200 each, what was the prediscount

    asked by Anonymous
  29. physics

    Red light with a wavelength of 660 nm and blue light with a wavelength of 480 nm are beamed at a double slit with a separation of 2x10^-3 mm. The third order maximums for the different colours occur at different spots. What is the angle between the second

    asked by Liz
  30. science

    When the front of a 5.0 m long bus traveling at a constant speed of 20 m/s is 55 m away from an intersection, the traffic light turns yellow. It will take 3.0 s before the traffic light turns red. The driver’s reaction time is 0.25 s. The bus can

    asked by Nica
  31. Philosophy

    According to Aristotle, we should begin ethical inquiry by specifying

    asked by Anonymous
  32. chemistry

    a.Given the equation: 2CaCO3 + 2SO2 + O2 -> 2CaSO4 + 2CO2 What is the actual yield of CO2 if 7.5 mol of O2 gives a percent yield of 80%? b. The pollutant sulfur dioxide can be removed from the emissions of an industrial plant by the reaction with calcium

    asked by Tsunayoshi
  33. physics

    When a pencil cell is released from a certain point on a inclined board,it travels a distance of 35cm on floor A before it comes to rest.when the same pencil cell is released from the same point on the same inclined board,it travels a distance of 20 cm on

    asked by reem
  34. physics

    Fill in blank: Two slits can produce an interference pattern with visible light but this maximal point of constructive interference can be made more pronounced by using many fine lines in a __________

    asked by Liz
  35. health care finance

    Your firm is considering the following three alternative bank loans for $1,000,000: a) 10 percent loan paid at year end with no compensating balance b) 9 percent loan paid at year end with a 20 percent compensating balance c) 6 percent loan that is

    asked by Anonymous
  36. science

    commercially available concentrated H CL contains 38% H CL by mass (a) what is the molarity of this solution if the density in 1.19gm/l (b) what volume of concentrated HCL is required to make 1l of 0.1M HCL?

    asked by anila
  37. chemistry

    Sodium metal is immersed into graduated cylinder that holds exactly 32.5 ml. The sodium metal used to fill the cylinder weighs 405.5 grams. Calculate the density of sodium based on the given data.

    asked by Marcus
  38. math

    The average mass of a group of children is 36kg. If 3/7 of the no. of children are girls and their average mass is 32 kg, find the average mass of the boys.

    asked by Anonymous
  39. Math

    Sita needs a perfect score of 100 for math test in this year so as to improve on her average score from 84 to 86. How many maths tests were there altogether in this year?

    asked by Anonymous
  40. physics

    A straight copper conductor is held parallel to the axis of a freely suspended magnetic needle such that the conductor is under the needle and the current is flowing from south to north. In which direction the north of magnetic needle will move?

    asked by Nadisha
  41. physics

    Why does a conductor carrying current experiences force when held in a magnetic field at right angles to it?

    asked by Nadisha
  42. Economics

    What are the consequences of providing subsidies and welfare?

    asked by Sinoyolo
  43. physics

    WHICH HAS PRINCIPAL QUANTUM NUMBER OF 3 AND ANGULAR MOMENTUM QUANTUM NUMBER OF 2 A 3s b 3d c 4f d 3f

    asked by AYESHA
  44. Statistics

    Express the confidence interval (0.033,0.099) in the form of P-E

    asked by Nina
  45. Physics

    why does the temperature of boiling water remain the same as long as the heating and boiling continue?

    asked by Niki D
  46. physics

    A 42 mT magnetic field points due west. If a proton of kinetic energy 9x10E-12 J enters this field in an upward direction, find the magnetic force acting on the proton in magnitude and direction. What magnetic force would an electron experience due to

    asked by seanmarch58
  47. physics

    The function of those little black transformers that clog your power strips is to step down line voltage to run small electronic gadgets. Suppose a fax machine uses an ideal transformer with a primary voltage of 120 V and primary windings. If the secondary

    asked by seanmarch58
  48. Physics 2

    A) Canadian FM radio station (CLAW) broadcasts lobster information at 95.9 MHz. find the wavelength of this station. (B) What would be the frequency of a station for which the carrier wave was 400 m long?

    asked by seanmarch58
  49. Physics 2

    An AM radio station has a wavelength of 300 m. find this station’s frequency?

    asked by seanmarch58
  50. Physics 2

    the microwave protion of the spectrum has wavelengths ranging from 1 mm to 1 m. find the corresponding frequency?

    asked by seanmarch58
  51. Physics 2

    if the average speed of light in a medium is 2.2x10E8 m/s, what is the medium’s index of refraction?

    asked by seanmarch58
  52. Physics 2

    A 6 cm high object is placed 43ncm from a converging lens of focal length 24 cm. Find the image’s position and draw a ray diagram approximately to scale.

    asked by seanmarch58
  53. Physics 2

    1.) The microwave protion of the spectrum has wavelengths ranging from 1 mm to 1 m. find the corresponding frequency? 2.) An AM radio station has a wavelength of 300 m. find this station’s frequency? 3.) A) Canadian FM radio station (CLAW) broadcasts

    asked by seanmarch58
  54. Statistics

    I need some help on how to write constraints. For example, I don't get how to do these problems and write a constraint for them: 1) A food store owner buys turkeys and hams. The owner plans to purchase at most a total of 50 products. Write a constraint. 2)

    asked by NNN
  55. Statistics

    How would I solve each system by substitution? I know basically what to do, but I keep getting stuck. Thanks! 1)x=2-y 3x-2y=1 2)2x+3y=-1 x=y-13

    asked by JOS
  56. Finanace

    If a firm just paid a dividend equal to $4.00 a share, then for the WACC, in order to find the cost of equity, $4 should be

    asked by Anonymous
  57. geography,maths lit,life science and agriculture

    careers available in the following subjects please

    asked by Nokubonga
  58. Intro to computers

    The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operating system?

    asked by Sam
  59. Chemistry

    Consider the data below Temperature (0C) Diffusivity (m2/s) 736 2 x 10-13 782 5 x 10-13 835 1.3 x 10-12 Given this data, determine the activation energy for the diffusion process (units of Joules per atom or molecule) in this material and the

    asked by Musaka
  60. Science

    What do these symbols mean: 8=====> and ({!}) and ({8=!})?

    asked by Anonymous
  61. statistics

    A student of the author surveyed her friends and found that among 20 males, 4 smoke and among 30 female friends, 6 smoke. Give two reasons why these results should not be used for a hypothesis test of the claim that the proportions of male smokers and

    asked by Katrina
  62. Biology

    Which of the following is the purpose of valves in the venous circulatory system? A. Promoting movement of oxygenated blood toward the heart B. Facilitating stasis of blood in the veins C. Propelling blood through the vena cava D. Preventing backward flow

    asked by J
  63. Math

    How would I find the solution set for a system of linear inequalities? For example, x-3y

    asked by HEL
  64. math

    A rowing team rowed an average of 17.2 miles per hour with the current and 10.4 miles per hour against the current. Determine the team's rowing speed in still water and the speed of the current I need help fast. anyone?

    asked by brandon
  65. english

    Freud believed the purpose of dreams is to consolidate memories and new learning. sort through possible solutions to everyday problems. fulfill wishes. discard unnecessary information. reconcile urges.

    asked by Mary
  66. HSM

    current or proposed law that impacts the delivery of human services.

    asked by Diane
  67. Chemistry

    Consider the data below Temperature(0C) Diffusivity(m2/s) 736 2 x 10-13 782 5 x 10-13 835 1.3 x 10-12 Given this data, determine the activation energy for the diffusion process (units of Joules per atom or molecule) in this material and the pre-exponential

    asked by L.
  68. math

    A certain test is worth 145 points. How man points are needed to obtain a score of $65%?

    asked by erica
  69. math

    The charge for renting a rowboat on Loon Lake is D dollars per hour plus c cents for each minute into the next hour. How many dollars will Mr.Wilson pay if he used a boat from 3:40 P.M. to 6:20 P.M.

    asked by john
  70. math

    8 < 5 + y

    asked by Erica
  71. cognictive and language development

    Which of the following statements about the Bayley Scales of Infant Development is correct? A. It emphasizes complex cognitive skills, such as infant memory and problem solving. B. It’s helpful for assessing the health and well-being of newborns. C. It

    asked by daniela
  72. chemistry

    A 52.3 kg sample of ethanol is needed for a reaction. What volume in liters of ethanol should be used? The density of ethanol is 0.789 g/mL

    asked by james
  73. Physics

    You are standing on a fish pond wishing to catch a fish. How would you aim your fish gun in order to catch a fish which your eyes could see 20 cm below the surface of water ? will u aim higher , lower or exactly on the location of the fish as seen by your

    asked by AJ
  74. physics

    how long does it take an car travailing in the left lane of a highway at 60km/h to overtake another car in the right lane traveling at 40km/hr when the cars start 100meters apart

    asked by justin
  75. physics

    A girl pushes up an incline fives times longer than a man who lifts the same block the same height. How much more force does the man exert on the block?

    asked by Emily
  76. Algebra

    3(x-1) -2(x^2+3x+4)-5(x+9)=

    asked by Anonymous
  77. calc 2

    sum ((√(n-1))-(√(n-1)))/n, as n=1

    asked by sarah
  78. math

    The length of rectangle is 120% that of the breadth. The perimeter is 88m. Find the area of the rectangle?

    asked by lisa
  79. calc 2

    find the maclaurin series for: f(x) = (1-3x)^-5. What is the radius of convergence?

    asked by Ryan
  80. Algebra

    Suppose that f(x)= (5x) _________ (x^2)−x−6 a. Determine the domain of f b. Determine the vertical asymptote(s), if any, of the graph of f c. Determine the horizontal asymptote(s), if any, of the graph of f d, Sketch the graph of f

    asked by Sammi
  81. math

    which of the following mathematical statements is a quadratic inequality?a)5t^2-r-20=0 b)9h+18=0 d)m^2+9m+16=0

    asked by =)
  82. math

    which of the ff. coordinates of points belong to the solution set of the inequality y

    asked by =)
  83. physics

    A cart being pulled by a 10 year old Boy with a force that is parallel to the surface. if the surface is inclined at 50° and the cart is 250kg while the surface has a coefficient of friction of 0.22 find the Normal force, Force of Friction and Force

    asked by Lu
  84. science

    Why do sulphur and iron form a compound on heating?

    asked by pràñay
  85. chemistry

    A student used 3.27g of Zn to react with excess HCl and obtains 6.47g ZnCl2. What is the percent yield?

    asked by Tsunayoshi
  86. chemistry

    Ammonium nitrate is used in explosives and is produced from the reaction of ammonia and nitric acid. If 15 kg of ammonia give an actual yield of 65.3 kg of ammonium nitrate, what is the percent yield? The calculated yield of ammonium nitrate for the

    asked by Tsunayoshi
  87. algebra

    A company charges 200 for each leather bag on order of 150 or less. The cost of each bag is reduced by 1 for each order in excess of 150 pieces. How many bags on order would result in result in maximum revenue? What is the maximum revenue?

    asked by Anonymous
  88. physics

    19. A ball with a mass of 2 kg moves to the right at a speed of 0.28 m/s. It hits a ball of mass 0.5 kg which is at rest. After collision, the second ball moves to the right with a speed of 1.5 m/s. What is the speed and direction of the first ball after

    asked by Kei
  89. maths

    Construct a right angel abc such that BC 4cm and hypotenuse is 30 at b

    asked by pratham
  90. health care finance

    St. Luke’s Convalescent Center has $200,000 in surplus funds that it wishes to invest in marketable securities. If transaction costs to buy and sell the securities are $2,200 and the securities will be held for three months, what required annual yield

    asked by Anonymous
  91. health care finance

    An important source of temporary cash is trade credit, which does not actually bring in cash, but instead slows its outflow. Vendors often provide discounts for early payment. What is the formula to determine the effective interest rate if the discount is

    asked by Anonymous
  92. math

    1. The salaries of A B and C are in the ratio of 2;3:5 the salary of B and C together is RS8000. % of the salary of C more than that of A by--

    asked by Kiran
  93. chemistry

    A sol n contains 37g cuso4 and 111g water . Calculate the concentration by mass /c of sol n.

    asked by Anonymous
  94. finance

    An important source of temporary cash is trade credit, which does not actually bring in cash, but instead slows its outflow. Vendors often provide discounts for early payment. What is the formula to determine the effective interest rate if the discount is

    asked by Anonymous