Popular questions and responses by Julie
  1. math

    The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 10

    asked on November 15, 2014
  2. chemistry 105

    Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)-->2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?

    asked on October 23, 2011
  3. chem

    How many moles of carbon are needed to react with 525 g of hematite 2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to carbon

    asked on September 29, 2013
  4. chemistry

    Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more

    asked on May 11, 2014
  5. physics

    A passenger on an interplanetary express bus traveling at = 0.95 takes a 9.0-minute catnap, according to her watch.How long does her catnap from the vantage point of a fixed planet last?

    asked on August 10, 2012
  6. Chemistry

    Suppose you titrated a sample of distilled water with EDTA, approximately what volume of EDTA would be required?

    asked on October 1, 2012
  7. math

    A company begins a radio advertising campaign in Chicago to market a new soft drink. The percentage of the target market that buys a soft drink is estimated by the function f(t)=100(1-e^-0.01t), where t is the number of days of the campaign. After how long

    asked on April 24, 2012
  8. Chemistry

    Given that E^o = 0.52 V for the reduction of Cu+(aq) + e - (yields) Cu(s) Calculate E^o, (delta)G^o and K for the following reaction at 25°C. 2Cu2+(aq) (yields) Cu2+(aq) + Cu(s)

    asked on May 11, 2010
  9. Chemistry

    Calculate E, E^o and (delta)G^o for the following cell reaction: Mg(s) + Sn2+(aq) (yields) Mg2+(aq) + Sn(s) [Mg2+] = 0.045 M, [Sn2+] = 0.035 M

    asked on May 11, 2010
  10. Math

    Isaac throws an apple straight up (in the positive direction) from 1.0 m above the ground, reaching a maximum height of 35 meters. Neglecting air resistance, what is the ball’s velocity when it hits the ground?

    asked on April 18, 2016
  11. physic

    a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/g-Celsius), and its mass is 60g. the heat capacity of the

    asked on February 26, 2013
  12. Math

    The length of a rectangle is 8 cm longer than its width , if the perimeter is 84 cm , what is its area

    asked on January 20, 2016
  13. Chemistry 105

    Ozone is depleted in the stratosphere by chlorine from CF3Cl according to the following set of equations: CF3Cl+UV light-->CF3+Cl Cl+O3-->ClO+O2 O3+UV light-->O2+O ClO+O-->Cl+O2 What total volume of ozone measured at a pressure of 22.0 mmHg and a

    asked on October 23, 2011
  14. Physics

    Monochromatic light of wavelength, λ is traveling in air. The light then strikes a thin film having an index of refraction n1 that is coating a material having an index of refraction n2. If n2 is larger than n1, what minimum film thickness will result in

    asked on August 6, 2015
  15. Chemistry 105

    Use the molar volume of a gas at STP to calculate the density (in g/L ) of carbon dioxide gas at STP.

    asked on October 23, 2011
  16. physics help please...

    A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the

    asked on December 20, 2010
  17. English

    A topic sentence should be very long. 1. True 2. False Please recheck my answer. I say True

    asked on July 16, 2016
  18. math

    the needle of the scale in bulk food section of a supermarket is 25 cm long. find the distance when the needle rotates 50 degrees

    asked on February 6, 2011
  19. Genetics 160

    Using D for tall plants and d for dwarf plants, a 1:1 ratio is obtained in which of the following crosses? These are my choices: Dd X dd DD X dd DD X Dd DD X DD Dd X Dd

    asked on September 29, 2013
  20. physics

    A hot iron horseshoe (mass = 0.43 kg), just forged (Fig. 14-16), is dropped into 1.60 L of water in a 0.26 kg iron pot initially at 20°C. If the final equilibrium temperature is 26°C, estimate the initial temperature of the hot horseshoe. Could someone

    asked on April 23, 2012
  21. geometry

    What's the next number 360, 180, 60, 15...?

    asked on March 20, 2012
  22. statistics

    A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transaction time exceeds 50 seconds.

    asked on October 5, 2010
  23. Physical Science

    How many meters away is a cliff if an echo is heard 0.500 s after the original sound? Assume that sound traveled at 343 m/s on that day.

    asked on March 6, 2010
  24. Production/Operations Management

    Here is a list of activity times for a project as well as crashing costs for its activities. Determine which activities should be crashed and total cost of crashing if the goal is to shorten the project by three weeks as cheaply as possible. First

    asked on December 1, 2018
  25. science physics

    Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?

    asked on October 6, 2010
  26. chemistry

    What is the is product of Nickel(II) nitrate+sodium phosphate This is what I have: Ni(NO3)2+Na3PO4----> can you help me on the resultant equation please

    asked on January 8, 2008
  27. Math

    a student answered 86 problems on a test and got a 98%. How many problems were on the test?

    asked on November 21, 2016
  28. chemistry

    So I did a titration lab at school with NaOH and HCl. i have to find: - volume used, NaOH - Moles of NaOH - Moles of HCl -Volume used unknown HCl - Molarity of HCl solution My concentration of NaOH stock solution was 0.100 mol/lL Final buret reading, NaOH:

    asked on January 4, 2015
  29. chemistry 105

    Complete and balance each of the following equations for gas-evolutions. Express answer as a chemical equation. Identify all the phases in your answer. HCl(aq)+K2SO3(aq)--> HCl(aq)+KHCO3(aq)--> HC2H3O2(aq)+NaHSO3(aq)--> (NH4)2SO4(aq)+KOH(aq)-->

    asked on October 10, 2011
  30. english

    Please tell me if I should use to or too in the following sentence: Anthony knew all (to, too) well that he shouldn't have eaten a third piece of lasagna.

    asked on October 19, 2010
  31. physics help

    Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -would it still be 300 N

    asked on October 17, 2007
  32. Math

    For the given graph of y=f(x), sketch the graph y=1/f(x). clearly show the asymptote(s) with a dotted line and write the coordinates of the invariant points

    asked on April 2, 2020
  33. Math

    Three times a number increased by seven is less than eleven

    asked on January 21, 2020
  34. chemistry

    3CuCl2 *2H2O + 2Al = 3Cu + 2AlCl3 + 6H2O Determine the number of grams that should have been produced when 1.25g of copper (2) chloride dehydrate reacts with excess aluminum so i'm not really sure how you're supposed to calculate the number of grams with

    asked on November 27, 2014
  35. Economics

    got this from my teacher, A monopolist faces a demand curve given by the following equation: P = $500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = $100 per day. Assume that the firm faces no fixed cost. and have the

    asked on May 7, 2013
  36. pre calc

    Two forces of 50 and 70 N (newtons) act on an object. The angle between the forces is 40°. Find the magnitude of the resultant and the angle that it makes with the smaller force.

    asked on April 7, 2008
  37. math

    At 9:30 A.M. Andrew left Exeter for Portsmouth, cycling at 12 miles per hour At 10:00 A.M. Stacy left Portsmouth for Exeter, cycling at 16 miles pewr hour. The distance from Exeter to Portsmouth is 20 miles. At what time did they meet?

    asked on November 23, 2007
  38. English/writing

    Can someone tell me if this sentence is ok? Or give suggestions on how I can make it better? The students not only raised money during the walk-a-thon but continued to collect pledges three weeks afterward.

    asked on April 14, 2018
  39. Math

    Find the effective rate of interest for 5% compounded monthly.

    asked on September 18, 2015
  40. Physics

    A newly discovered particle, the SPARTYON, has a mass 895 times that of an electron. If a SPARTYON at rest absorbs an anti-SPARTYON, what is the frequency of each of the emitted photons (in 1020 Hz)? The mass of an electron is 9.11×10-31 kg.

    asked on August 16, 2015

    Suppose that at least 13.0 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon? Give frequency for

    asked on August 10, 2015
  42. chemistry 11

    Food manufacturers sometimes add calcium acetate to puddings and sweet sauces as a thickening agent. What volume of 0.500 mol/L calcium acetate, Ca(CH3COO)2 (aq), contains 0.300 mol of acetate ions? So I've been over this a hundred times and I still can't

    asked on December 17, 2014
  43. Statistics

    Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the score obtained by the top 5% of the students? I do not understand the 5% part. What does the tail look like on the bell-shaped graph?

    asked on December 13, 2013
  44. physics conceptual

    The tires of a car support the weight of a stationary car. If one tire has a slow leak, the air pressure within the tire will _______ with time, the surface area between the tire and the road will ________ with time, and the net force the tire exerts on

    asked on January 27, 2013
  45. math

    Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. P = $2500, r = 3%, t = 3, compounded quarterly $ ?

    asked on November 20, 2012
  46. Math

    Lalph Rauren was famous for discovering potential models as he walked the streets of New York. One day he spotted four girls who later became top models: Amy, Mary, Kay, and Beth. One was discovered walking through an apartment building, one in a coffee

    asked on November 13, 2011
  47. Chemistry 105

    A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.3 atm?

    asked on October 23, 2011
  48. chemistry 105

    Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.7 g. What minimum mass of H2SO4(in g) would you need? What mass of H2

    asked on October 10, 2011
  49. algebra

    Find the equation of the line that passes through the points ( 8, - 15 )and(-2,5). write the equation in y=mx = b form.

    asked on February 19, 2011
  50. Algebra

    The resistance in an electric circuit varies inversely with the current. If the resistance is 12 ohms when the current is 4 amps, what is the resistance when the current is 8 amps.?

    asked on February 19, 2011
  51. physics help pleased

    Two trains on separate tracks move toward one another. Train 1 has a speed of 125 km/h and train 2 a speed of 100.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of

    asked on January 28, 2011
  52. pre algebra

    $29/kg = how many cents/ g???? im really confused

    asked on January 5, 2011
  53. Chemistry

    State whether each of the following aqueous solutions would be acidic, basic, or neutral. Include appropriate net-ionic equations to show why a given solution is acidic or basic. a) NaNO3 b)KC6H5CO2 c)50:50 mixture of C6H5CO2H+KC6H5CO2 d)(CH3NH3)Cl e)50:50

    asked on March 13, 2010
  54. Physical Science

    A cubic tank holds 1,000.0 kg of water. What are the dimensions of the tank in meters? Explain your answer.

    asked on March 6, 2010
  55. physics

    The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -19°C and 39°C? (answer in cm)

    asked on November 30, 2009
  56. Probability

    Suppose a random variable X has a cumulative distribution function given by F(a) = {0 for a

    asked on January 21, 2009
  57. Numerical Analysis

    x 0 2 3 4 y 7 11 28 63 a)_Using these values, use the Lagrange interpolation process to obtain a polynomial of least degree. b)_rearrange the points in the table of a) and find the newton form of the interpolating polynomial. Show that they are the same

    asked on October 6, 2008
  58. newton's method #2

    i want to verify that when newton's method is used to compute sqrt(R) (by solving the equation x^2=R), the sequence o iterates is defined by x_(n+1)=.5(x_(n) + (R/x_(n))

    asked on September 28, 2008
  59. Micro Economics

    Health maintenance organizations (HMOs): A. are based on the traditional fee-for-service system of paying physicians. B. charge a fixed amount per member, hire many of their own physicians, and provide health services only to members. C. are also known as

    asked on June 6, 2008
  60. physics

    A 920 g empty iron kettle is put on a stove. How much heat in joules must it absorb to raise its temperature form 15.0° C to 93.0° C? (The specific heat for iron is 113 cal/kg · °C.)(1 cal = 4.184 J)

    asked on January 22, 2013
  61. Algebra

    Dan and Dave can work together and paint a house in 4 days Dan works twice as fast as Dave. How long to paint house alone

    asked on May 20, 2020
  62. Math

    Write a mixed number that is equivalent to 16/3

    asked on December 12, 2019
  63. Physics

    I've got a few questions. I'll show my work but I'm struggling and need to turn in this homework by midnight :( 1) Calculate g (the acceleration due to gravity) for the space shuttle’s orbit, 200 km above the Earth’s surface. M= 5.98x10^24kg (given on

    asked on July 24, 2019
  64. Science

    How are the respiratory and circulatory and respiratory systems similar? A) Both systems provide glucose and other substances to cells. B) Both systems regulate blood flow throughout the body. C) Both systems help remove carbon dioxide from the body. D)

    asked on March 30, 2018
  65. English

    All sentences in a paragraph must relate to the idea that the topic sentence in the paragraph introduces. 1.True 2. False I say true. Please recheck my answer.

    asked on July 16, 2016
  66. English

    A brief, concise introduction can be effective. 1.True 2.False I think its true, please recheck my answer.

    asked on July 9, 2016
  67. math

    The student to teacher ratio is 19:1 at a local school and there is a total of 500 students and teachers. How many teachers and how many students are there. I'm not sure how to begin to set this up since I have two unknowns and not only one.

    asked on April 11, 2016
  68. Math

    A round silo is 55 feet tall and has a 18 foot radius. How high would a load of 31000 cubic feet of grain fill the silo?

    asked on October 7, 2015
  69. science: chemistry

    A buffered solution is made by adding 47.4 g C2H5NH3Cl to 1.00 L of a 0.68 M solution of C2H5NH2. Calculate the pH of the final solution. (Assume no volume change. Assume that all solutions are at 25°C.)

    asked on July 23, 2015
  70. Physics

    A weight of 340 N is suspended from a pole by means of a rod 4m long and a rope tied to one end 3m above. Find the tension on the rope the force of the rod.

    asked on July 19, 2015
  71. Chemistry

    Neutralization reaction HCL(aq) + NaOH(aq) -> NaCl(s) + H2O(l) Use your results to determine the netball change of the neutralization reaction, in kJ/mol of NaOH, Write the thermochemical equation for the neutralization reaction. I'm not sure how to even

    asked on March 9, 2015
  72. chemistry

    What mass of sodium hydroxide pellets must be poured into a waste drum containing 20.0 L o 3.0 mol/L sulphuric acid to completely neutralize the waste acid solution? Write a balanced chemical equation for this reaction. okay, so here is the work I already

    asked on December 15, 2014
  73. Can someone Explain this(math)

    34, 36, 43, 46, 47, 48, 48, 52, 53, 54 Box And whisker Plot I Don't Understand these at all can someone Explain without totally giving me the answer?

    asked on February 21, 2014
  74. chemistry

    Ammonium chloride and sodium nitrite react to form sodium chloride, water and nitrogen gas. If 6.33 moles of ammonium chloride react with sodium nitrite, how many grams of sodium chloride will be produced?

    asked on January 29, 2014
  75. Chem Simple question

    Magnesium metal burns in oxygen to form magnesium oxide, MgO. (a) Write a balanced equation for the reaction Why is it 2Mg+O2->2MgO and not Mg+O->MgO

    asked on September 29, 2013
  76. math

    the product of 1000 whole number is 1000, what is the largest possible value the sum of these numbers can have

    asked on August 26, 2013
  77. Math

    Sam needs to cut a piece of sheet metal into 8 pieces. All the cuts are made in the same direction. It takes him 5 minutes to make each cut. How many cuts will Sam make? How would making a table help you find the number of minutes it took Sam to cut the

    asked on February 14, 2013
  78. Chemistry

    The Cu2+ ions in this experiment are produced by the reaction of 1.0g of copper. Information already found out .016 mol Cu2+ produced Overall reaction is Cu2+(aq)+Cl-(aq)+Cu(s)=2 CuCl(s) Maximum mass of CuCl that can be prepared from the reaction sequence

    asked on October 23, 2012
  79. Finance

    Use the following financial statements for Lake of Egypt Marina, Inc. LAKE OF EGYPT MARINA, INC Balance Sheet as of December 31, 2012 and 2011 (in millions of dollars) 2012 2011 2012 2011 Assets Liabilities and Equity Current assets: Current liabilities:

    asked on September 9, 2012
  80. Calculus Grade 12 University

    a total of 8 meters of fencing are going to be used to fence in a rectangular cage for pets and divide it into three smaller cages **the photo that is shown with this question is three (3) boxes stuck together side by side horizontally*** determine the

    asked on April 12, 2012
  81. Calculus grade 12

    Determine the equation of the tangent line to the function (² = square): f(x) = x + cos²x at x = pie/4

    asked on April 12, 2012
  82. Calculus Grade 12 University

    Use the second derivative test to find the local minimum and maximum values of each function, wherever possible. A) f(x) = 16/x + x^2 B) s(t) = t^4 - 8t^3

    asked on March 23, 2012
  83. geometry

    An equilateral triangle has sides that measure 5x+3 units and 7x-5 units. What is the perimeter of the triangle?

    asked on November 8, 2011
  84. Chemistry 105

    A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?

    asked on October 23, 2011
  85. Chemistry 105

    Which of the following reactions are redox reactions? 1. Al(s)+3Ag^+(aq)-->Al^3+(aq)+3Ag(s) 2. SO3(g)+H2O(l)-->H2SO4(aq) 3. Ba(s)+Cl2(g)-->BaCl2(s) 4. Mg(s)+Br2(l)-->MgBr2(s)

    asked on October 10, 2011
  86. Calculus

    A stone is dropped from the edge of a roof, and hits the ground with a velocity of -145 feet per second. How high (in feet) is the roof

    asked on July 22, 2011
  87. economics- free trade.

    What are the advantages and disadvantages of free trade?

    asked on July 5, 2011
  88. Chemistry

    I need to find out what the total acid concentration is in Kool-Aid. If 23.3 mL of 0.1043M NaOH neutralize a 60 mL solution of Kool-Aid (10 mL) and water (50 mL), what is the total concentration in a 10.00 mL aliquot of Kool-Aid? If you prepared a standard

    asked on February 15, 2011
  89. geometry

    find the value of the variable and LN if M is between L and N. LM=8a, MN=11a, LM=24

    asked on December 14, 2010
  90. statistics

    Given a test statistic of z= 1.50, the p-value for a right-tail (upper tail) test is approximately

    asked on October 5, 2010
  91. physics

    How much work is done on a bookshelf being pulled 5.00m at an angle of 37.0 degrees from the horizontal? The magnitude of the component of the force that does the work is 43.0N

    asked on May 24, 2010
  92. English

    Write a five paragraph papper on the importance of literary elements on literatuer. Use examples.

    asked on January 11, 2010
  93. physics

    The figure below shows a test charge q between the two positive charges. Find the force (in newtons) on the test charge for q = 1 µC. Give a positive answer if the force is to the right and a negative answer if the force is to the left.

    asked on January 27, 2009
  94. integral confusion

    integral of Sec[2x]Tan[2x] i know u is sec 2x du=2sec2xtan2x dx what would i have to multiply with du so it would equal tan 2x dx? if my question is confusing, then here's another example of what i'm talking about: integral of (3x-2)^30 dx u=3x-2 du=3 dx

    asked on November 26, 2007
  95. chemistry

    one moles of a compound containing only carbon, hydrogen, and nitrogen was burned in the presence of excess oxygen to give 264g of CO2, 63 g of H20, and 46 g of NO2. Calculate the molecular formula of the compound.

    asked on September 16, 2007
  96. Algebra

    I just need an example of a real-life application of a quadratic function. Thanks so much!

    asked on June 23, 2008
  97. life science!

    Whats the difference between decomposer,consumer,and producer? give an example of each and tell how producers make their own food. I looked in my book but it just doesnt say anything about any of those 3 things!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! For food: A

    asked on September 9, 2006
  98. History

    All of the following were goals of the Confederate States of America EXCEPT: a. protecting against any effort to abolish slavery b. ensuring the continuation of the international slave trade c. protecting the slave trade in the U.S. d. ensuring the

    asked on April 23, 2020
  99. Math

    Sketch the graph of f(x)=x^2-4 and y=1/f(x) on the grid provided. label the asymptotes, the invariant points and the intercepts of y=1/f(x)

    asked on April 2, 2020
  100. Accounting

    Porto Waste Facilities Inc. (PWF) is a large, diversified Canadian-controlled private company with several Canadian and US subsidiaries, operating mainly in the waste management and disposal industry. PWF was incorporated in 1955 and has grown to become

    asked on March 15, 2020


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