Most popular questions and responses by L
  1. Precal, please help asap!

    How many solutions does a triangle with values a = 42, A = 117 degrees, and b = 34 have

    asked on May 28, 2014
  2. Chemistry

    Complete and balance the molecular equation, including phases, for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 and aqueous lithium hydroxide, LiOH Enter the balanced net ionic equation, including phases, for this reaction.

    asked on March 5, 2015
  3. English

    1. Choose the answer that best matches the word in italics. Samantha tried to look IMPASSIVE when they announced her essay as a finalist in the competition.  (1 point) surprised*** unemotional unsure vibrant 2.   Choose the answer that best matches the

    asked on September 28, 2016
  4. Chemistry

    The Kp for the following equilibrium system is 4.31 x 10‒4 at 375°C : N2(g) + 3H2(g) ↔ 2NH3(g). If 0.862 atm of N2 and 0.373 atm of H2 were mixed in a constant-volume flask and heated to 375°C, which of the following would be closest to the

    asked on April 26, 2012
  5. Chemistry

    Complete the following acid-base reaction with balanced molecular, total ionic and net ionic equations: calcium hydroxide (aq) + acetic acid (aq) ----> ? I know that calcium hydroxide is ca(OH)2 and that acetic acid is CH3COOH. I also know that one of the

    asked on November 2, 2009
  6. Chemistry

    What is the concentration of the resulting solution when 250 mL of 0.1 M K3PO4 and 300 ml of 0.5 M K3PO4 are mixed?

    asked on June 10, 2013
  7. Physics

    In the figure below, the CG of the pole held by the pole vaulter is 1.54 m from the left hand, and the hands are 0.653 m apart. (Assume the vaulting pole has a mass of 3.72 kg.) -Calculate the force (in N) exerted by his right hand. (Enter the magnitude.)

    asked on October 31, 2017
  8. Chemistry

    To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.122 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.)

    asked on November 21, 2016
  9. Precal, TRUE OR FALSE

    TRUE OR FALSE The motion of a pendulum for which the maximum displacement from equilibrium varies is an example of simple harmonic motion.

    asked on May 28, 2014
  10. chemistry

    When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

    asked on February 6, 2010
  11. physics

    A solid uniform 45.0 kg ball of diameter 32.0 cm is supported against a vertical frictionless wall using a thin 30 cm wire of negligible mass. (a) make a free body diagram for the ball and use it to find the tension in the wire and (b) how hard does the

    asked on June 11, 2010

    If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B? B= 62.3 or 117.7 B = 62.3 B = 117.7 there is no solution

    asked on May 28, 2014
  13. world history

    Which of the following statements is true of the Gulf of Tonkin affair? A. Johnson told Congress to pass the Gulf of Tonkin Resolution to let him expand the war. B. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. C. The

    asked on July 30, 2014
  14. Precal, please help asap!

    The angles of elevation theta and alpha to an airplane from the airport control tower and from an observation post 2 miles away are being continuously monitored. If theta is 42 degrees when alpha is 81 degrees, how far is the plane from the observation

    asked on May 26, 2014
  15. Physics

    An object is thrown vertically upward at 18m/s from a window and hits the ground 1.6s later. What is the height of the window above the ground?(air resistance is negligible)

    asked on December 29, 2012
  16. Physics

    A toy car mass 0.05 kg ,on a ramp with no friction , begins at 0.7 meters high. At the bottom it collides inelastically with a toy truck mass 0.2 kg, at rest.  After the collision the car is at rest, what is the final velocity of the truck?

    asked on October 26, 2017
  17. College Physics

    A 50 dB sound wave strikes an eardrum whose area is 5.0 x 10^-5 m^2. A.)How much energy is absorbed by the eardrum per second? B.) At this rate, how long would it take your eardrum to receive a total energy of 1.0 Joule?

    asked on May 6, 2010
  18. Chemistry

    Predict the product(s) and write a balanced equation for the following redox reaction: pentane (C5H12) + oxygen ---->

    asked on November 6, 2009
  19. Math

    Find the Maximum area for the given perimeter of a rectangle. State the length and width of the rectangle. 28 inches Well, finally a calculus problem. Ok, we know that the area for a rectangle is A=l*w and the perimeter is P=2(l+w) In this problem P= 28,

    asked on August 31, 2006
  20. Physics

    a toy car of mass 0.01 kg, gets into an elastic collision with a toy train mass 0.35 kg. if the train is at rest and the car is moving at 2 m/s initially. how fast is the train moving after the collision? Use the equation ((2*m)/(m+t))*v

    asked on November 1, 2017
  21. Chemistry

    In the equilibrium system CH3COOH(aq) + H2O(l) —> — H3O+ CH3COO-(aq) .

    asked on January 21, 2018
  22. Chemistry

    if NaCl is added to this equation: [Co(OH2)6]2+ + 4 Cl- + heat ->(supposed to be double arrow) [CoCl4]2- + 6 H2O would the equilibrium shift right or left? also same question for the addition of AgNO3.

    asked on April 15, 2009
  23. physics

    A (10.25) kg bowling ball is hung on a (11.50) m long rope. It is then pulled back until the rope makes an angle of (39.0) degrees with the vertical and released. Find the speed of the ball is at the lowest point. Give your answer in m/s and with 3

    asked on February 25, 2017
  24. Finance

    Here is a forecast of sales by National Bromide for the first 4 months of 2012 (figures in thousands of dollars): Month: 1 2 3 4 Cash sales 19 28 22 18 Sales-on-crdt 140 160 130 110 On average, 40% of credit sales are paid for in the current month, 20% in

    asked on October 10, 2012
  25. Physics

    A baseball pitcher throws the ball in a motion where there is rotation of the forearm about the elbow joint as well as other movements. If the linear velocity of the ball relative to the elbow joint is 15.0 m/s at a distance of 0.410 m from the joint and

    asked on November 8, 2017
  26. math

    Write two expressions that show that increasing a quantity by 4% is the same as multiplying that quantity by 1.04.

    asked on December 5, 2012
  27. Physics

    A satellite experiences a gravitational force of 228 N at an altitude of 4.0xE7 m above Earth. What is the mass of this satellite ?

    asked on June 14, 2016
  28. History

    The new morals and manners of the 1920s were reflected in A. women's fashion B. the great migration C. the new factory jobs D. Politics Americans responded to the Selective Service Act A. with enthusiasm B. with antiwar riots C. by refusing to register D.

    asked on May 7, 2012
  29. Chemistry

    What volume (in milliliters) of 0.170 M NaOH should be added to a 0.140 L solution of 0.021 M glycine hydrochloride (pKa1 = 2.350, pKa2 = 9.778) to adjust the pH to 2.84? I tried using the Henderson- Hasselbalch equation but I am confused about what to do

    asked on February 28, 2016
  30. Precal

    Can someone please help me with the last 4 questions in this paragraph? Suppose that Tiger hit a golf ball with an initial velocity of 150 ft/sec at an angle of elevation of 30°. Write the parametric equations to represent the flight of the ball. How long

    asked on May 26, 2014
  31. chemistry

    Explain why using a Büchner funnel with vacuum to filter hot fluid will result in clogging. What is the result of reduced pressure on a hot volatile solvent? How does this affect the amount of solute that is dissolved? Where would the funnel become

    asked on September 30, 2015
  32. chemistry

    How can you tell which mobile phase is more polar in TLC? (hexane/ethyl acetate/ethanol vs. isopropanol/ammonia)? the hexane/ethyl acetate/ethanol travelled up the TLC faster, does this make it more polar?

    asked on September 28, 2009

    T NO PLH I A SWAA I found the answer by Googling "t no plh" Apparently, someone else posted the same question on a puzzles forum website. To no Please Help I Am SWAAT

    asked on September 20, 2006
  34. precal help asap

    If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B?

    asked on May 28, 2014
  35. Chemistry

    So the Ksp for silver chloride is 1.8*10^-10, how could I find the concentration of silver ions in this saturated solution. Then how I find the total ion concentration? AgCl ==> Ag^+ + Cl^- Let AgCl solubility is x. Then (Ag^+) is x and (Cl^-) is x Ksp =

    asked on May 17, 2007
  36. Statistics

    a sample of n=25 scores has a mean of M=65 and an estimated standard error of 2 points. What is the sample variance

    asked on June 22, 2016
  37. Physics

    a toy car of mass 0.01 kg, gets into an elastic collision with a toy train mass 0.35 kg. if the train is at rest and the car is moving at 2 m/s initially. how fast is the train moving after the collision?

    asked on October 30, 2017
  38. Calc

    The region bounded by y=2.5x^2 and y=4x is to be rotated about both axes and the volume generated calculated by both the washer and the shell methods. 1)The volume of the region bounded by y=2.5x^2 and y=4x, when rotated about the x-axis is? 2) The volume

    asked on September 16, 2012
  39. business math

    Mel’s Furniture received an invoice dated September 27 for five bedroom sets at $3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM. Assuming Mel pays on November 2,

    asked on December 27, 2011
  40. Physics

    Which method of sliding a block of ice requires less force—(a) pushing or (b) pulling at the same angle above the horizontal?

    asked on October 8, 2014
  41. Environmental

    Is there an effective way for coal-fired plants to effectively dispose of used scrubber solution after wet scrubbing?

    asked on March 5, 2019
  42. physics

    Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?

    asked on July 31, 2014
  43. math

    Events A and B are dependent events. The probability that event A occurs is 20%. The probability that events A and B both occur is 8%. What is the probability that event B occurs given that event A occurs? Explain how you found your answer.

    asked on June 9, 2017
  44. Finance

    Juan and Rachel Burpo plan to buy a time-share in six years of $16,860. In order to have adequate funds to do so, the Burpo want to make a deposit to their money market fund today. Assume that they will be able to earn an investment rate of 5.75%,

    asked on February 7, 2016
  45. Chemistry

    A bug is observed to travel 72 cm in 7.5 seconds. What is the bug's speed in miles per hour?

    asked on September 11, 2012
  46. College Physics

    A raft is made of wood with a density of 404 kg/m^3. It is 42 cm thick and its square area is 3.0x3.0 m^2. It is floating in seawater (density = 1025 kg/m^3). How many people of 68 kilogram can the raft hold before they start getting their feet wet?

    asked on April 19, 2010
  47. Chemistry

    Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed to react completely with 19.0g of sulfur to form sulfur hexafluoride?

    asked on October 20, 2009
  48. chemistry

    Radioactive materials are often used in biological studies. A radiation biologist studies the rate of decomposition of a certain substance and obtains the following data: Time(days) 0 4.0 8.0 12.0 16.0 Mass (μg) 15.50 10.90 7.67 5.39 3.79 Determine the

    asked on February 4, 2012
  49. chemistry

    What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) -->

    asked on July 20, 2011
  50. Chemistry

    Gunpowder is a mixture of potassium nitrate, sulfur and carbon in the proportion by mass of 6:1:1 (KNO3:S:C). A typical rifle shell contains 3.0g of gunpowder. How many moles of each component are there in our sample of gunpowder?

    asked on October 20, 2009
  51. DBQ Essay

    How long does the thesis usually have to be? Will 4 sentences suffice?

    asked on October 19, 2008
  52. MATH

    Write a mathematical sentence to compare each pair of measures. GB and GF Please help. I don't understand. I don't understand either. You'll need to supply more details. Ordinarily, a measure is any function that assigns non-negative values to objects,

    asked on September 4, 2006
  53. Physics

    A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite?

    asked on June 14, 2016
  54. Math-unit rate

    Molly walks 1 1/2 miles in 3/5 hour. What is the walking rate?

    asked on August 19, 2015
  55. Algebra

    Remove the parentheses from the following expression, and combine like terms: (2x + 3y – 4z) – (x – y – z) A.3x +4y+5z B. 3x + 4y – 3z C.x +4y–3z D. x + 2y – 5z

    asked on November 15, 2013
  56. Math/Algebra

    Please help me with this, below is a question I have to answer…below that is my answer…did I do, or answer this correctly? Post a response of at least 50 words to the following: Explain how to graph linear equations using the x- and y-intercepts.

    asked on December 2, 2009
  57. Accounting

    During its first year of operations, Maria Rose set up Roseland Inc. and invested $25,000 in the corporation. The company earned $68,000 of revenues and incurred $32,000 of expenses. At the end of the year, the company owed $24,000 to its creditors. A cash

    asked on July 13, 2014
  58. Microeconomics

    For a downward-sloping demand curve, marginal revenue decreases as quantity sold increases. True or False?

    asked on April 6, 2010
  59. Chemistry

    A 500.0-mL sodium iodide (NaI) solution was prepared by dissolving 37.7g of solid NaI in water. Chlorine gas was bubbled through a 100.0-mL sample of this solution until the reaction was complete. How many grams of molecular iodine were produced?

    asked on November 6, 2009
  60. math

    what is 72.5 divided by 1.25

    asked on October 8, 2009
  61. physics

    Starting from rest, a student pulls a (34) kg box a distance of (13.50) m across the floor using a (161) N force applied at 35.0 degrees above horizontal. The coefficient of kinetic friction is 0.220 between the floor and the box. Find the work done by the

    asked on February 21, 2017
  62. Math

    In the triangle ABC given, side AB is twice as long as side AC. We have: m

    asked on June 13, 2016
  63. math

    the green paint jar is 4/8 full. The purple paint jar is 4/6 full. Which paint jar is less full?

    asked on February 22, 2016
  64. algebra

    What is the first step you should take to solve the following expression: 2 – 16 ÷ 4 × (3 + 2)2 + 1 ? A. 16 ÷ 4 B. 2 – 16 C. 3 + 2 D. 22

    asked on November 15, 2013
  65. Maths-Trigonometry

    a kite is attached to a string that is 15m long. If the string makes an angle of 26 degrees to the horizontal the height of the kite is.

    asked on July 28, 2012
  66. College Physics**

    A student goes to planet x and wants to determine the gravity there. The student knows from physics lab that they can use Atwood's machine to determine gravity. The student places a 100g mass and a 110g mass at the end of a string and hangs it over a

    asked on March 9, 2010
  67. Chem

    How many moles of ions are released when this sample is dissolved in water? 3.55*10^18 formula units of Ba(OH)2*8H2O? So far I know to divide this by avogadro's number (/6.022*10^23) which equals .590*10^-5 mol. Don't know what to do from here. Please

    asked on November 6, 2009
  68. chemistry

    How can you tell which mobile phase is more polar in TLC? (hexane/ethyl acetate/ethanol vs. isopropanol/ammonia)? the hexane/ethyl acetate/ethanol travelled up the TLC faster, does this make it more polar? The TLC is silica gel!

    asked on September 28, 2009
  69. physics

    A student pulls a (34) kg box a distance of (13.50) m up a ramp set at 25.8o using a force of (181) N applied parallel to the ramp. Find the efficiency of the ramp. Give your answer in percent (%) and with 3 significant figures.

    asked on March 2, 2017
  70. MATH


    asked on May 16, 2015
  71. Physics

    An object that starts from rest completes 7 revs in 3 seconds. What is angular accel. in rad/s2?

    asked on October 4, 2014
  72. physics

    A snail moved 0.14 m between two cabbages in 3.0 minutes. The average speed of the snail is

    asked on July 31, 2014
  73. Precal

    A distress flare is shot straight up from a ship’s bridge 75 ft above the water with an initial velocity of 76 ft/sec. a) Write a set of parametric equations for the path of the flare. ______________________________ ______________________________ What

    asked on May 26, 2014
  74. chemistry

    What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) --->

    asked on July 20, 2011
  75. Calculus - integration

    Integral of (2x+5sin(x))^2 dx i didn't know how to start this question so i expand the squre first and then did the rest but its wrong and i don't think my method is right. thank you.

    asked on November 2, 2010
  76. economics

    if the government gives $1,000 of food stamps to a poor family,will the family now have $1,000 more food than before?

    asked on April 21, 2010
  77. physics

    A 22.0 kg box is sliding down on an incline set at (44) degrees up from horizontal. The coefficient of kinetic friction between the box and the incline is (.27). Find the acceleration of the box. Give your answer in m/s2 and with 3 significant figures.

    asked on February 21, 2017
  78. precal help asap

    solutions to the equation tan^2x - 3 = 0 ( there can be more than one) 2pi/3 pi -pi/3 5pi/3

    asked on May 28, 2014
  79. calculus

    The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

    asked on December 20, 2010
  80. Precalc

    The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

    asked on December 20, 2010
  81. psy

    I was asked to define independant and dependant variables without defing, but buy using an example...would this be one...two digging dogs, one never corrected for digging(IV) and one corrected by a loud noise(DV), or would that be classical conditioning?

    asked on August 30, 2010
  82. college algebra

    an inlet pipe can fill a large water tank in 3 hours. an outlet pipe can empty the same tank in 5 hours. given an empty tank, at 8pm, activate both pipes. what time on the clock will it be before the tank is completely filled?

    asked on September 30, 2009
  83. math

    The only perfect number of the form x^n + y^n

    asked on October 28, 2007
  84. World HIstory

    Is iceland part of the British Isles? No, just Great Britian and Ireland are part of the British isles. oops. I meant Ireland instead of iceland. Thanks though. It asnwered my question !

    asked on September 3, 2006
  85. M

    Find an equation of the linear function f having a slope of -2 if f(1)=3. My teacher never taught us this, please help.

    asked on September 17, 2014
  86. Math 4th grade

    9,924 9 is the underline digit round each digit... I think it's 10,000

    asked on September 8, 2014
  87. physics

    A bus traveled 10.0 km from the north end of the city to the south in 10.0 minutes. The average speed of the bus was

    asked on July 31, 2014
  88. Physics

    A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation

    asked on April 11, 2014
  89. algebra

    In a class of 50 students, the number of women is 2 more than five times the number of men. How many women are in the class?

    asked on March 19, 2013
  90. math

    juanita planted 2 flower gardens in similar square shapes. what are the measures of all the angles in each garden? explain how you know.

    asked on January 3, 2012
  91. pressure change

    What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) --->

    asked on July 20, 2011
  92. calculus


    asked on February 17, 2011
  93. Calculus - integration

    Q. ¡ò(15^x/3^x) dx i know that the ¡ò(a^x) dx = a^x/lna +c but i don't know how to solve this question. thank you

    asked on November 1, 2010
  94. economics

    which of the following are government purchases of goods and services and which are government transfer payments?a.the apollo,b.subsidy to agriculture and industry,c.social security,d.salary received by federal employee,e.unemployment benefits paid to a

    asked on April 22, 2010
  95. economics

    in the nation of mortorania,taxpayer A earns $40,000 and pays $40,000 in taxes while taxpayer B earns $80,000 and pays 6,000 in taxes.is the tax system of mortorania progressive, proportional (flat), or regressive?

    asked on April 22, 2010
  96. Chemistry

    A 3.26g sample of metallic sodium is added to 200mL of water. How many moles of NaOH are produced?

    asked on November 2, 2009
  97. physics

    block of dry ice resting on a table is given a brief push. a moment later, which of the following forces act on the block?

    asked on October 20, 2009
  98. Social 30

    So I have to write an essay test on this question: "To what extent should political decision-making be restricted to a specific group in society?" I'm having a lot of trouble on what to say, I'm terrible at essay writing, so if someone could help that

    asked on October 11, 2006
  99. math

    Suppose the area of a rectangle is 36 square inches. Find the Minimum perimeter for a rectangle with this area. Please help asap. Thank you! (so much) We know that A=l*w=36 and P=2(l+w) From the area formula we see that l=36/w Putting this into the

    asked on August 31, 2006
  100. math

    Pete recently bought whiteboard supplies for employees in his office. He spent $140 on whiteboards, markers, and erasers. The markers came in packs of 5, which cost $6 per pack. One (1) eraser was 1/3 of the cost of 1 pack of markers and 1 whiteboard was 5

    asked on May 17, 2018


  1. 1
  2. 2