Popular questions and responses by Leo
  1. Chemistry

    What is the pressure (in atmospheres) of the gas inside the container connected to an open-end, mercury-filled manometer as shown in the picture? The atmospheric pressure is 0.95atm. l----l | (G) l | l - --- l Hg l Hg *18cm - - --- Hg Hg HgHgHgHg what

    asked on October 21, 2007
  2. Latin (GA Connections Academy)

    Can you please help me with these translations? I know this is just homework help and not "we're going to solve your problems" but I have been slaving over these problems for hours and yes I have cried. I have scoured every resource available, including

    asked on May 17, 2018
  3. physics

    Hello everyone, I need help with this question: A dart gun is fired while being held horizontally at a height of 1.00m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00m. A

    asked on September 4, 2012
  4. grammar - showed versus shown

    Which is the following sentences is grammatically correct? "She had shown me so much about love." "She had showed me so much about love." Thanks, Leo (webmaster)

    asked on September 27, 2007
  5. Chemistry

    How many kilograms of chlorine are in 30kg of each of the following chlorofluorocarbons (CFC's)? CF2Cl2 -in kg's; CFCl3 -in kg's; C2F3Cl3 -in kg's?

    asked on October 1, 2007
  6. Chemistry

    For the reaction, calculate how many grams of the product form when 3.2 g of Mg completely reacts. Assume that there is more than enough of the other reactant. 2Mg(s)+O2(g)→2MgO(s)

    asked on July 17, 2016
  7. Algebra 2

    Given that f(x) = x² + 4x, evaluate f(-2).

    asked on February 25, 2015
  8. Physics

    Two horizontal forces F1 and F2 act on a 1.7 kg disk that slides over frictionless ice, on which an xy coordinate system is laid out. Force F1 is in the negative direction of the x axis and has a magnitude of 3.0 N. Force F2 has a magnitude of 9.0 N. What

    asked on March 6, 2012
  9. Math

    You plan to construct a brick wall measuring 4.5 m in length, 1.2 m high, and 0.5 m in width. If a brick measures 20 cm x 9 cm x 5 cm, how many bricks will you need? Total volume (to the nearest tenth) = ________ cubic meters. The number of bricks

    asked on June 14, 2012
  10. Economics (Net Present Value

    Approximately 14 million Americans are addicted to drugs and alcohol. The federal government estimates that these addicts cost the U.S. economy $300 billion in medical expenses and lost productivity. Despite the enormous potential market, many biotech

    asked on September 7, 2015
  11. physics - relative motion

    A ferryboat, whose speed in still water is 4.00m/s, must cross a river whose current is 3.00m/s. The river runs from west to east and is 128m wide. The boat is pointed north. a) If the boat does not compensate for the flow of the river water and allows

    asked on December 18, 2012
  12. Physic

    1. Water at a pressure of 3.00 x 10 5th Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter. What is the speed of the flow in the narrow section? Not sure was successfully posted

    asked on December 5, 2012
  13. math

    You must cover a hole that is elliptical in shape. You measure the major and minor axes and find them to be 6 ft. and 4.5 ft. respectively. If you want a 6 inch overhang around the hole, how much covering will you need? (Round to the tenths place.)

    asked on June 17, 2012
  14. Math

    Suppose you deposit $1000 in an account paying 4% annual interest, compounded monthly. How much money will you have after 15 years?

    asked on July 29, 2018
  15. Physics - forces acting at an angle

    The physics of tobogganing and forces at an angle: A child is tobogganing down a hillside. The child and the toboggan together have a mass of 50.0kg. The slope is at an angle of 30.0 degrees to the horizontal. Assume that the positive y-direction is

    asked on January 5, 2013
  16. Physics...Equilibrium (physics of a clothesline)

    A clothesline is attached to two fixed ends which are 10.0m apart. A pulley of mass 40.0kg hangs freely in the middle of the line. The sag at the centre is 0.20m. Find the tension in each half of the clothesline.

    asked on January 3, 2013
  17. physics

    An electron is accelerated from rest to a velocity of 2.0x10^7 m/s. a) if the electron travelled 0.10m while it was being accelerated, what was its acceleration? b)How long did the electron take to attain its final velocity? Please correct me if I'm wrong

    asked on December 13, 2012
  18. finance

    In computing the cost of common equity, if D1 goes downward and Po goes up, Ke will

    asked on February 9, 2011
  19. algebra 2

    Logs are stacked 7 rows high. The top row has 15 logs, the second row has 18 logs, and the third row has 21 logs. This pattern continues similarly. What is the total number of logs in the stack?

    asked on March 29, 2018
  20. math

    Moffett’s Candy Factory makes candy in the shape of cylinders. The net of a cylindrical piece of candy is shown below. two circle with diameter of 4cm each and a rectangle with a lenght of 1.5 cm wha is the total surface area of this piece of candy?

    asked on January 19, 2014
  21. physics

    an object weighs 3 lb. at 10 earth radii from its center. What is the object's weight on the earth's surface?

    asked on June 17, 2012
  22. Math

    The Smiths have a pool that is 20 feet by 35 feet. A 5 foot wide deck completely surrounds the pool. The average depth of the pool = 6 feet. How much surface area is covered by the proposed pool deck?

    asked on June 14, 2012
  23. geometry

    A rectangular solid has sides of 10 cm, 6.5 cm, and 8.3 cm. What is its volume and surface area?

    asked on May 27, 2011
  24. time management

    As I spend more and more time working, I spend less time with family and friends. However, my career and financial success are important to me. How do I balance the time I spend making money versus time I spend with people? What are some critical questions

    asked on August 23, 2007
  25. chem

    Consider the reaction when aqueous solutions of sodium nitrate and ammonium sulfide are combined. net ionic equation?

    asked on March 6, 2018
  26. Chemistry Homework

    Backpackers often use canisters of white gas to fuel a cooking stove’s burner. If one canister contains 2.45dL of white gas, and the density of the gas is 0.720g/cm3, what is the mass of the fuel in kilograms? So

    asked on June 3, 2016
  27. math plz help ;-;

    Determine the x-coordinate of the solution of the system of equations below. You may use any method: 2x-y=10 x+y=2 Determine the y-coordinate of the solution for the system of equations. You may use any method. 2x-y=10 x+y=2 Plz help i really don't

    asked on June 1, 2016
  28. algebra

    Consider the equation y=-2√3x-12 -5 a. Write the equation in function notation, y=af(k(x-c))+d. b. Describe the transformations that have taken place from base the function.

    asked on March 19, 2015
  29. Engineering

    Determine the relationship between the radius and height of a right-cone with a volume of 300 cm3. This is all there is to the question and I'm not sure what my teacher wants for an answer.

    asked on September 1, 2014
  30. english

    6. Which one of the following fragments is a prepositional phrase? A. During the darkest night B. Going to Cleveland C. Listening to her heart D. Completed her assignment I'm stuck between A & B please help me?

    asked on May 15, 2013
  31. math

    using exactly four 4s and only addition, subtraction, multiplication, and division, write an expression that equals each of the numbers from 1 to 10. you do not have to use all the operations, and numbers such as 44 are permitted

    asked on July 7, 2012
  32. math

    A car has a 12 volt battery. The engine has a resistance of 0.22 ohms. How many amps will be drawn from the battery when the key is turned?

    asked on June 17, 2012
  33. Math

    If a mixture of 24 lb. of cement, 48 lb. of sand, and 63 lb. of gravel is needed to make 1 cubic foot of concrete, how many pounds of sand are needed to pour a pool deck of 156 cubic feet? _______pounds

    asked on June 14, 2012
  34. solid mensuration

    A cylindrical tank with flat ends has a diameter of two meters and is 5meters long. It is filled with fuel to a depth of one and one-half meters. Find the volume of the fuel in the tank in liters. plsss help!!

    asked on May 13, 2011
  35. Chemistry

    It is estimated that uranium is relatively common in the earth’s crust, occurring in amounts of 4 g/metric ton. A metric ton is 1000 kg. At this concentration, what mass of uranium is present in 1.0 mg of the earth’s crust?

    asked on February 15, 2010
  36. chemistry

    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 15.9g . A)What minimum mass of H2SO4 (in g) would you need?

    asked on October 20, 2007
  37. Math

    If the graph of the function h defined by h(x)= -4x2-1 If translated vertically downward by 3 units, it becomes the graph of function f. Find the expression for f(x)

    asked on April 9, 2020
  38. physics

    (a) In a hot summer afternoon, you just finished a football game. You rushed back to your home to grab a coke to cool yourself down. Unfortunately, you found out that you forgot to store your coke in the refrigerator but placed it on the dining table.

    asked on December 2, 2019
  39. Algebra II

    What multiplies to 4 and adds to -2? I'm trying to find the zeroes of the function f(x)=x^2-2x-8. I did the AC/B tree (1*-8/-2) and from there I can't figure it out.

    asked on October 9, 2019
  40. Maths

    Andrianna can read 7pages in 10 minutes. At this rate how many pages can she read in 25 minutes?

    asked on October 28, 2018
  41. Algebra

    Bernie has $16000 invested, part at 3% and the remainder at 5%. If the yearly interest on each investment is the same, how much interest does he receive each year?

    asked on May 7, 2017
  42. math

    If 2 workers takes 15 hours to make 3 fireplaces, how long 5 workers takes to make 4 fireplaces ?

    asked on August 26, 2016
  43. math plz check ;-; sorry

    A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2

    asked on May 31, 2016
  44. Math

    Im stuck on these multiply choice questions for math. Please help. It's due tomorrow!! Question 1- Bob received a credit card statement that has a new balance of $786.75 and a minimum payment of $25.60. Bob makes only the minimum payment. He makes no other

    asked on March 10, 2016
  45. calculus

    find the minimum and maximum points of the curve y=x^4-4x^3+4x^2

    asked on August 18, 2015
  46. history

    I have to create a mind map about the Great Depression. there are seven factors contributing to the effect. I need help creating a visual aspect to show the causes and effect. ex. (it's taken) a hockey net that says Great Depression and different sports

    asked on March 31, 2015
  47. English

    I'm writing a news report about a rocket club sets new launch record. I need ideas on what to write about that heading

    asked on March 8, 2015
  48. Chemistry

    Hello, I'm having some trouble getting started on this question: "Calculate the volume and mass required to make 0.1 M solutions of Propionic Acid (1.0 M) and Sodium Propanoate (96.06 g/mol)" I would normally not have trouble answering this question when

    asked on March 3, 2015
  49. math

    it costs $12.50 to see a movie at a theater near jason's house. it only costs $1,95 to rent a dvd from an online service a dvd player costs $125 to the nearest whole number, how many movies must jason watch on dvd instead of at the theater before he

    asked on February 18, 2015
  50. computer problem

    Many day ago my seddenly my computer can't open. The power botton can't light. Please help me.

    asked on May 6, 2014
  51. English

    11. In which one of the following sentences is the simple subject also the complete subject? A. Crocodiles, quiet as logs, lurked on the riverbank. B. Detectives Homer Fry and Janine Small looked high and low for clues. C. Large and small dinosaurs stalked

    asked on May 15, 2013
  52. Algebra

    Simplify each of the following expressions into simplest terms. a) {[-X+Y+(-2)*(-2Y)*[X-Y]}/[(X-Y)^2+(X+Y)^2] b) (X^3+4X^2Y+4XY^2+2XY-6Y^2)/(X+2Y)

    asked on May 5, 2013
  53. pre calculus

    1.) If h(x)= (fog)(x) and h(x) = 3 over the square root of x+3 , find g(x) if f(x)= 3 over the square root of x+2. my answer is x+1. Am I right? 2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone

    asked on April 6, 2013
  54. Math

    Hannah's teacher brought in a bucket containing 72 blocks. The blocks are red, yellow or blue. Hannah wants to figure out the number of blue blocks without emptying the bucket. Hannah chooses a block from the bucket records its color and then replaces it.

    asked on February 12, 2013
  55. physics

    Jupiter's gravitational field at the surface is approximately three times that of the earth. A person weighing 120 lb. on the earth's surface would weigh how much on Jupiter?

    asked on June 17, 2012
  56. physics

    If a force of 60 N is exerted on a 15 kg object, calculate the acceleration that the object undergoes. ________m/s(squared)

    asked on June 14, 2012
  57. Math

    If a pool holds 22,000 gallons, how long will it take to fill the pool at a rate of 400 gallons per minute, rounded off to the nearest minute? _______ minutes Thank you

    asked on June 14, 2012
  58. social studies

    how did the decline of copper prices in the1980s affect chile

    asked on June 5, 2012
  59. math

    This week’s focus is on systems of equations. Describe a profession that might use this on a regular basis, and give an example with a solution (not covered in the text) of a math problem with a real-life application.

    asked on February 10, 2012
  60. solid mensuration

    Find the volume of water in the horizontal tank if it is 7/8 full. Radius of the tank is 600mm. and the lenght of the tank is 5m. If the tank is place in a vertical position, what is the depth of water inside the tank?

    asked on May 12, 2011
  61. chemistry

    8.00g of NaOH are dissolved in water to make 3.00 L of solution. What is the concentration of hydronium ions, , in this solution?

    asked on November 15, 2009
  62. MATH

    Isopropyl alcohol, C3H8O, is used in rubbing alcohol mixture. Alcohol on the skin cools by evaporation. How much heat(in kJ) is absorbred by the alcohol of 2.25g EVAPORATED? THE HEAT VAPORIZATION OF Isopropyl alcohol is 42.1 kJ/MOL Compute the number of

    asked on June 11, 2007
  63. if you're in the mood for riddles

    The riddle forum is back up: http://www.jiskha.com/net_riddle There are some truly clever riddles being posted. The following is one of my favorites. Try not to scroll down because then you'll see the answer(s):

    asked on April 11, 2007
  64. Econ

    What effect do lifting of price controls have on inflation in the long run? I need some ideas... I think inflation will eventually be under control in the long run, but i don't know what factors will cause that. Good tough question. Take a shot. I would

    asked on January 21, 2007
  65. one-third done with new forum

    I worked on the new forum all day yesterday. It should be done by the end of tomorrow. There won't be any visual changes, but the forum should load even faster. Also, that silly random error message will stop occuring. Wonderful! Keep up the good work. DAG

    asked on October 26, 2006
  66. chem

    What volume of 2.30 M potassiom iodide, KI, solution is needed to prepare 250.0 mL of .220 M potassium iodide solution? Find volume in mL.

    asked on February 7, 2020
  67. chemistry

    any one know how i can solve this question? What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant pressure process for a system containing 0.956 moles of CH3OH ? CH3OH(g, 122.0 ºC, 1.00 atm) ⟶ CH3OH(l, 34.0 ºC,

    asked on February 3, 2020
  68. chemistry

    can someone help me solve this question. im not sure how to start so even some guidance would be helpful. thanks! One mole of O2(g) undergoes the following change in state. O2(g, 299 K, 4.38 bar) ⟶ O2(g, 252 K, 6.79 bar) What is ΔS for the gas? Assume

    asked on February 2, 2020
  69. math

    24. If two sides of a triangle measure 14 and 19, what is the inequality for the third side? plsss helppp

    asked on January 10, 2020
  70. language

    analogy flower : rose as book is to what

    asked on December 5, 2019
  71. Careers

    can I become a dentist or paramedic without physics and pure mathematics ?

    asked on November 27, 2019
  72. chemistry

    (a) A solution of 2.000 g of the compound Y(CH6N2O5) dissolved in 40.00 g water has a freezing point of -2.38 degree C. What is the molar mass of the compound Y(CH6N2O5) ? what is the implication of this molar mass? (Given that the freezing point

    asked on November 17, 2019
  73. algebra

    if 12 people can paint 15 houses in 24 days, how many days would it take for 3 people to paint 5 houses?

    asked on October 12, 2019
  74. physics

    When the Sun is directly overhead, a hawk dives towards the ground with a constant velocity of 5.1 m/s at 45° below the horizontal. Calculate the speed of its shadow on the level ground. m/s

    asked on March 31, 2019
  75. Linear Algebra

    Help me find my error! a)Write down the equation of the plane passing through the point (1,5,7) and parallel to the lines. Line A: Line B: Point x = 3- 2t x = 2 - 2t y = 1 - 5t y = 3 - 2t z = 2 - t z = 1 + 4t Parametric equation of the plane = + t1 + t2

    asked on December 6, 2018
  76. Math

    What is m - 7

    asked on November 7, 2018
  77. Algebra

    You invest $5,500 into a 4.5% one-year CD. Find the balance of the account after five years if it's compounded: a. Quarterly Equation:______________________ Balance: $_________________ b. Annually Equation:______________________ Balance: $_________________

    asked on July 30, 2018
  78. Algebra

    How much would you need to invest to get $30,000 in 10 years for an account offering 2.54% interest?

    asked on July 30, 2018
  79. Algebra

    find the numbers of this geometric sequence: 8, __ , __, __, 648

    asked on July 30, 2018
  80. Algebra

    You just purchased a painting for $1500 as an investment and it is suppose to appreciate in value at a rate of 3.65% each year. What will it be worth in 25 years?

    asked on July 30, 2018
  81. Math

    Aricela is trying to estimate the distance between her house and the park. On a map with a scale of 0.5 in. = 2 miles, the distance between her house and the park is 2.75 in. Which proportion can Aricela use to determine the distance, d, between her house

    asked on March 27, 2018
  82. algebra 2

    PLEASE HELP ME WITH THIS QUESTION I DONT WANT TO FAIL AND I FEEL AS IF IM WRONG! The average daily minimum temperature for Pablo’s hometown can be modeled by the function f(x)=15.3sin(πx6)+44.1 , where f(x) is the temperature in °F and x is the month.

    asked on January 19, 2018
  83. Science

    Cystic fibrosis is a recessive genetic disorder caused by a mutation of the CTRF gene. The disease is characterized by excessive mucus production along the respiratory and digestive tracts in addition to other symptoms. Cystic fibrosis is a progressive

    asked on October 31, 2017
  84. chemistry

    SO2 and O2 are placed in a 2.00 L container at a temperature of 786 °C and a pressure of 6.99 atm. During the reaction, SO3 forms and the pressure falls to 1.89 atm. Determine how many moles of SO3 are generated.

    asked on September 12, 2017
  85. Math

    In Manorville, the current rate for school taxes is 7.5% of property value Find the tax on a house assessed at 20,000?

    asked on July 31, 2017
  86. math

    If 2/5 of 2/3 division sign is divided by 3/10, what is the resulting value?

    asked on July 28, 2017
  87. math

    cant find a way tosolve this Five years ago, Ms. Halliday received a mortgage loan from the Scotiabank for $60,000 at 7.8% compounded semiannually for a five-year term. Monthly payments were based on a 25-year amortization. The bank is agreeable to

    asked on April 20, 2017

    A piece of string is 3 yards long. How many 1 1/4-yard long pieces can Julie cut from the string? A. 1 B. 2 C. 3 D. 4

    asked on November 2, 2016
  89. Math

    A piece of string is 3 yards long. How many 1 1/4-yard long pieces can Julie cut from the string? A. 1 B. 2 C. 3 D. 4

    asked on November 2, 2016
  90. Government

    What laws could be created by the idea of artistic expression?

    asked on September 30, 2016
  91. Physics

    A boy throws a ball off the top of a 30m high building with a speed of 10m/s at an angle of 30 degrees to the horizontal. How far from the base of the building does the ball strike? I broke in up into 2 dimensional: X horizontal values: Xi=0 Xf=?

    asked on June 11, 2016
  92. math plz help ;-;

    Assuming that the cone is completely filled with ice cream, which of the following equations below could be used to calculate the total volume of ice cream in the cone (before you start eating it!)? On top of the cone is 18 as the bottom is 26.

    asked on June 1, 2016
  93. math plz help ;-;

    A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2

    asked on June 1, 2016
  94. math plz help ;-;

    What is the equation of the line containing the two points (-4, 8) and (1, -7)? A.y=-3x B.y=3x+4 C.-3y=x-4 D.y=-3x-4 I need help with this Q i don't understand it can anyone show me step by step ;-; sorry

    asked on June 1, 2016
  95. math plz check ;-;

    A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2

    asked on May 31, 2016
  96. math plz check ;-;

    Order the following solids from least (1) to greatest (3) volumes. A rectangular pyramid whose base has an area of 60 in2 and whose height is 10 in. third A rectangular prism with a length of 6 in, a width of 5 in, and a height of 10 in. first A right

    asked on May 31, 2016
  97. math plz help ;-;

    What is the y-coordinate of the y-intercept of the linear equation 2x - 3y = 12? Plz help I don't understand how to do this can you show me step by step plz, sorry ;-;

    asked on May 31, 2016
  98. math plz help ;-;

    What is the equation of the line containing the two points (-4, 8) and (1, -7)? a.y=-3x b.y=3x+4 c.-3y=x-4 d.y=-3x-4 plz check if my answer is correct. My answer is c ^^;

    asked on May 31, 2016
  99. math plz check ;-;

    Choose the correct graph for the linear equation 2x - 3y = 12. a.y=-3x b.y=3x+4 c.-3y=x-4 d.y=-3x-4 plz check if my answer is correct. My answer is c ^^;

    asked on May 31, 2016
  100. math plz help ;-;

    Solve the following equation: -2(x-3)+4=8x-20 please help me how to do this step by step plz i do understand how to do this, sorry ;-; And thank you for the ones the helped me with the other Q :D

    asked on May 30, 2016


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