Most popular questions and responses by dave
  1. Social studies

    Which of the following factors was most responsible for an unequal distribution of wealth? A There was an increase in business profits. B Wages were not keeping pace with profits of business owners. C Wages were not keeping pace with profits of business

    asked on February 23, 2017
  2. Social Studies

    1. Which of the following apply to fascism? Select all that apply. A rooted in militarism B extreme nationalism C respect for minorities D blind loyalty to the state I think its A,B, and c ----------------------------------- 2. Which of the following best

    asked on February 26, 2017
  3. Social studies

    Which of the following was the main contributor to finally bringing the United States out of the Great Depression? A the National Recovery Administration B the Good Neighbor Policy C wartime spending D the election of Roosevelt D or B

    asked on March 8, 2017
  4. Calculus

    Gloria would like to construct a box with volume of exactly 45ft^3 using only metal and wood. The metal costs $15/ft^2 and the wood costs $6/ft^2. If the wood is to go on the sides, the metal is to go on the top and bottom, and if the length of the base is

    asked on November 4, 2015
  5. Language Arts

    Which of the following statements best summarizes the "fiddler's bill" Bostonians had to pay for the tea party, as described in Section 1 of Chapter VII? I read the book and spark notes talking about it, but I still need help, does anyone know this?

    asked on December 17, 2014
  6. spanish

    Answer the questions negatively, using the imperfect tense. Make sure to include the direct object pronoun when needed. Follow the model. Modelo ¿Juega Daniel al fútbol? No, pero antes lo jugaba. ¿Hablas por teléfono? No hablaba ¿Fue a la playa

    asked on March 31, 2011
  7. physics help!!!

    In February 1955, a paratrooper fell 365 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 60 m/s (terminal speed), that his mass (including gear) was 90

    asked on March 26, 2010
  8. General Chemistry

    A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution?

    asked on October 12, 2010
  9. Physics

    A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.2 m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak?

    asked on October 6, 2016
  10. Math

    "Cab companies often charge a flat fee for picking someone up and then charge an additional fee per mile driven. Pick a U.S. city and research the rates of two different cab companies in that city. Find companies that charge different amounts per mile and

    asked on November 13, 2017
  11. Electricity and Electronics

    A complete circuit contains two parallel-connected devices and a generator for providing the electromotive force. The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage developed by the generator is 40

    asked on February 24, 2015
  12. physics

    A uniform pole 7m long and weighing 10kg is supported by a boy 2m from one end and a man 3m from the other end.At what point must a 20kg weight be attached so that the man would support thrice as much weight as the boy?

    asked on June 21, 2018
  13. Math

    Suppose y varies directly with x, and y = 14 when x = -4. What is the value of y when x = -6 How would i do this

    asked on November 8, 2017
  14. spanish 4

    César le da consejos a un amigo en su primer día de trabajo porque el director de la cadena tiene muy mal humor. Escucha los consejos y cámbialos a mandatos. Sigue el modelo. Play audio For number 1 this is what the person says 1)el siempre pide que

    asked on February 23, 2011
  15. Chemistry

    How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 111.0 mL of 0.36 M H2SO4?

    asked on May 25, 2015
  16. math

    Fido weighs 26 pounds more than Fifi. Fifi weighs 12 pounds less than Rover. If the sum of their weights is 71, how much does Fifi weigh?

    asked on February 4, 2017
  17. History

    "When the war ended in 1945, two-thirds of all American men between the ages of 18 and 34 were in uniform. Experts feared that without wartime production, many returning soldiers might have trouble finding jobs. Unemployment would rise, and the economy

    asked on April 18, 2017
  18. Math

    a geometric progression has a third term of 20 and a sum to infinity which is three times the first term. find the first term

    asked on May 12, 2016
  19. Social Studies

    Which action is often viewed as the most serious attempt to undermine the independence of the judiciary? A President Franklin D. Roosevelt’s plan to reorganize the Supreme Court B appointment of Supreme Court justices to unlimited terms of office C

    asked on February 23, 2017
  20. Math

    Find the 999th derivative of cos x. I got sin x.

    asked on October 20, 2016
  21. Chemistry-Solubility Product

    Why does effervescence when the Group 2 anion precipitate is acidified imply the presence of (CO3)2- ?

    asked on April 12, 2009
  22. Chemistry

    Nitrogen monoxide reacts with chlorine gas according to the reaction: 2NO (g) + Cl2 (g) ⇔ 2NOCl (g) Kp = 0.27 at 700 K A reaction mixture initially contains equal partial pressures of NO and Cl2 . At equilibrium, the partial pressure of NOCl is 115

    asked on April 4, 2017
  23. Algebra 1

    8.A number raised to a negative exponent is negative. Always, never , or sometimes. 7. Evaluate 1/2a^-4b^2 a = -2 and b = 4. 6. Simplify. Write in scientific notation. (9 x 10^-3)^2 Thanks to anyone who helps right away and need right answer from the

    asked on February 4, 2013
  24. History

    Which of the following helped women in the workplace? A the Civil Rights Act of 1964 B the Voting Rights Act of 1965 C the end of segregation D Hernandez v. Texas I think it's D or b

    asked on April 11, 2017
  25. chemistry

    A 40.0-mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the volume required to reach the equivalence point (in mL)

    asked on April 27, 2017
  26. algebra

    While shopping, Jill spent six times as much as Nan. If they spent a total of $112, how much did each person spend?

    asked on October 24, 2010
  27. Physics

    The worker pushes with a force of 10 N that points downward at an angle of 45° below the horizontal. What component of the force moves the crate forward? I do not know how to set up this problem, so any help would be appreciated.

    asked on May 31, 2016
  28. physics

    A 64.2-kg skier coasts up a snow-covered hill that makes an angle of 23.8° with the horizontal. The initial speed of the skier is 7.18 m/s. After coasting 1.96 m up the slope, the skier has a speed of 3.13 m/s. Calculate the work done by the kinetic

    asked on November 26, 2011
  29. math

    The acceleration of a particle at a time t moving along the x-axis is give by: a(t) = 4e^(2t). At the instant when t=0, the particle is at the point x=2, moving with velocity v(t)=-2. Find the position of the particle at t=1/2 if you could show me how to

    asked on February 23, 2009
  30. science

    Describe (with calculations) how you prepare 1.00 L of 0.750 M barium hydroxide solution starting with Solid barium hydroxide

    asked on March 8, 2008
  31. chemistry

    The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?

    asked on September 3, 2010
  32. AP Chemistry

    (a) What is the pH of a 2.0 molar solution of acetic acid. Ka of acetic acid = 1.8 x 10¯5 (b) A buffer solution is prepared by adding 0.10 liter of 2.0 molar acetic acid solution to 0.1 liter of a 1.0 molar sodium hydroxide solution. Compute the hydrogen

    asked on February 13, 2007
  33. Physics

    A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.2 m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak?

    asked on October 5, 2016
  34. 9th grade

    using only 15 of these letters,tlpuytsiaaganbrnlrog,what do you call a female bug that floats?

    asked on January 7, 2009
  35. FSE 120

    A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to

    asked on May 30, 2013
  36. chem

    A 6.75-g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 55.8 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

    asked on March 14, 2013
  37. Algebra

    Isaac wants to enclose his backyard with a fence that is bounded on one side by the back of the house. if he has 164 feet of fencing material find the maximum area that can be enclosed by the fence.

    asked on February 20, 2015
  38. calculus

    The population of a country was 8.4 million people in 2000. Three years later, the population of the same nation was 9.3 million people. Assuming that population is growing exponentially, what is the projected population (rounded to one-tenth of a million)

    asked on November 10, 2011
  39. Chemistry

    a large amount of potassium in plant food could cause the formation of MgKPO4:6H2O along with MAPH. what would be the effect on the calculated percentage of P2O5 in question 1 if MAPH were mixed in with your precipitate? would the %P2O5 in this mixture be

    asked on September 19, 2013
  40. Chemistry - Chemical Equilibrium

    In a solution with carbon tetrachloride as the solvent, the compound VCl4 undergoes dimerization: 2VCl4 V2Cl8 When 6.6834 g VCl4 is dissolved in 100.0 g of carbon tetrachloride, the freezing point is lowered by 5.97*C/ Calculate the value of the

    asked on December 10, 2013
  41. Physics

    The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.

    asked on February 27, 2011
  42. English

    Read the passage below and answer the question: Jack: I’ll be there in 20 minutes. I’m stopping at the store to pick up some batteries. Do you need anything? Mike: Will you buy some coffee for me? I’ll pay you back when you get here. Which statement

    asked on November 19, 2013
  43. Chemistry

    A person falls in water at 0 C. After 30 min in the water, he/she suffers from hypothermia, as their body temp drops to 30 C. Since we are water.... we assume the heat capacity is 4.18 J/g/C. 180 Kcal of energy is required to raise the persons temp to 40

    asked on June 10, 2009
  44. physics

    An object is dropped from a height of 12m.At what height is the rock kinetic energy and its potential energy be equal?

    asked on February 18, 2012
  45. chemistry

    The first ionization potential of the elements B, C, and N (atomic numbers 5, 6, and 7) steadily increases, but that of O is less than that of N. The best interpretation of the lower value for O is that: 1. the ionization potential of N is a maximum and

    asked on September 15, 2010
  46. physics

    A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose

    asked on September 28, 2009
  47. Physics, Eectric flux

    A cubical Gaussian surface surrounds three positive charges, each has a charge q1 = +4.00 × 10-12 C, and two negative charges, each has a charge q2 = −2.30 × 10-12 C as the drawing shows. What is the electric flux passing through the surface?(The

    asked on July 13, 2015
  48. dynamics

    If end A of the rope moves downward with a speed if 5 m/s, determine the speed of cylinder b

    asked on February 3, 2012
  49. Physics

    A 2.9 kg body is at rest on a frictionless horizontal air track when a horizontal force F acting in the positive direction of an x axis along the track is applied to the body. A stroboscopic graph of the position of the body as it slides to the right is

    asked on July 22, 2010
  50. physics

    A proton has an initial speed of 3.9×105 m/s. What potential difference is required to bring the proton to rest? What potential difference is required to reduce the initial speed of the proton by a factor of 2? What potential difference is required to

    asked on February 13, 2012

    When air pollution is high, ozone (O3) contents can reach 0.60 ppm (ie., .60 mol ozone per million mol air). How many molecules of ozone are present per liter of polluted air if the barometric pressure is 755 mm Hg and the temperature is 79 degrees F? I

    asked on January 4, 2007
  52. Physics

    A child of mass 40.0 kg is swinging on a swing with ropes of length 4.0 m. How long does it take the child to swing from the maximum height on one side to the other?

    asked on February 5, 2011
  53. physics/chem

    n Fig. 21-41, three identical conducting spheres initially have the following charges: sphere A, 7Q; sphere B, -8Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two

    asked on March 31, 2008
  54. Economics

    If Mary takes money from her savings account and buys a T-bond from Jody with that money, it's: A. An expansionary fiscal policy. B. An example of contractionary monetary policy. C. An example of expansionary monetary policy D. An example of neutral

    asked on June 24, 2007
  55. Physics

    A hockey player is initially moving at 5.00m s to the east. Her mass is 50.0 kg. She intercepts and catches on her stick a puck initially moving at 35.0m s at an angle of 30 degrees (Fig. 6.40). Assume that the puck’s mass is 0.50 kg and the two form a

    asked on April 1, 2015
  56. Physics (optics)

    A ray of light traveling in air strikes the midpoint of one face of an equiangular glass prism (n = 1.74) at an angle of exactly 30.0â—¦ Trace the path of the light ray through the glass and find the angle of incidence of the ray at the bottom of the

    asked on May 12, 2015
  57. Marshall Middle

    Of 450 lunches old at school on Thursday, 40% were hamburgers and the rest were pizza. How many  more pizza lunches were sold than hamburgers?

    asked on February 28, 2016
  58. history

    Discuss the original purposes of the Freedman’s Bureau and the goals of the planned enlargement of the program by Congress. Evaluate how successful it was in helping the Reconstruction efforts

    asked on May 4, 2012
  59. Chemistry

    Suppose you titrated a sample of sulfuric acid (diprotic acid) with a 0.250 M solution of NaOH. Given the data in the table below, what is the concentration of the sulfuric acid solution?

    asked on December 6, 2016
  60. math

    Two vectors have magnitudes of 3 units and 8 units respectively. The resultant of these two vectors has a magnitude of 8 units. What is the angle between these two vectors?

    asked on March 1, 2013

    Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and

    asked on February 13, 2012
  62. Math

    A is partly constant and partly varies as b when A is equal to 15 B was 2 when is equal to A 45 is B equal to 8

    asked on March 9, 2019
  63. Physics

    Obtain the rotational kinetic energy of the earth due its daily rotation on its axis. Assume the Earth to be a uniform sphere; take m = 5:98 x 10^(24) kg; r = 6:37 x10^6 m 1 point 9.8 x 10^(29) 2.56 x 10^(29) 8.85 x 10^(25) 1.00 x 10^(29)

    asked on March 11, 2018
  64. Trignometry

    Use the appropriate reciprocal identity to find the approximate value of sin θ for the given value of csc θ. Use a calculator. csc θ = 2.15750581

    asked on September 8, 2017
  65. chem

    Determine the mass of oxygen in a 7.2-g sample of Al2(SO4)3

    asked on April 18, 2016
  66. chemistry

    How many milliliters of a 110mL solution of 1.5 M AlCl3 must be used to make 70mL of a solution that has a concentration of 0.2M Cl–?

    asked on November 3, 2011
  67. physics

    Identify the force that propels a rocket. 1)The rocket is propelled by the reaction force of the exhaust gasses bouncing off the air molecules outside the rocket. 2)The rocket is propelled because the action force of the rocket on the exhaust gases is

    asked on October 18, 2016
  68. Chem

    Acetic acid (CH3COOH) reacts with isopentyl alcohol (C5H12O) to form isopentyl acetate (C7H14O2), a fragrant substance with the odor of bananas. CH3COOH + C5H12O -> C7H14O2 + H2O If the yield for the reaction is 45%, how many grams of the product are

    asked on October 31, 2010
  69. Pre-Calc

    Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= tanx + secx My work so far: (sinx/cosx + 1/cosx + cosx/cosx)/(sinx/cos x - 1/cosx + cosx/cosx)= tanx + cosx (just working on the left side) ((sinx + 1 - cosx)/cosx)/((sinx - 1 +

    asked on January 2, 2007
  70. American History

    Which statement best describes the Monroe Doctrine? A. The United States welcomed European involvement in all issues in North America. B. The United States welcomed any European involvement in South America. C. The United States pledged to involve itself

    asked on April 3, 2015
  71. pennfoster

    Which of the following sentences contains a verb in the simple past tense? A. I was working overtime for about six months. B. We helped Joan to pack her things. C. She would like to join us. D. Jenna has driven this route multiple times.

    asked on January 19, 2012
  72. physics

    A large boulder is ejected vertically upward from a volcano with an initial speed of 41.0 . Air resistance may be ignored.

    asked on October 21, 2010
  73. Science

    How many Coulombs of charge pass through a 95W amplifier plugged into 110V wall socked over the course of a 2 hour concert?

    asked on April 20, 2009
  74. Chem

    Nitric acid can be prepared by bubbling dinitrogen pentoxide into water. N2O5(g) + H2O -> 2H+(aq) + 2NO3-(aq) a) How many moles of H+ are obtained when 1.50 L of N2O5 at 25 degrees C and 1.00 atm pressure is bubbled into water? b) The solution obtained in

    asked on January 1, 2007
  75. Chemistry

    The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law of A. definite proportions. B. atomic disintegration. C. conservation of energy. D. conservation of matter. im

    asked on February 25, 2015
  76. physics

    A liquid (ρ = 1.65 g/cm^3) flows through two horizontal sections of tubing joined end to end. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 245 cm/s, and the pressure is 1.20 105 Pa. In the second section the

    asked on February 6, 2013
  77. geometry

    what are the possible coordinate of the midpoint of the given segment

    asked on November 8, 2010
  78. SCIENCE 1

    Which of the following is a true statement about chemical equilibria in general A.there is only one set of equilibrium concentrations that equal the Kc value B.eqauilibrium is the result of cessation of all chemical change C.at equilibrium the rate of the

    asked on May 11, 2010
  79. chemistry

    Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 13.2 g of O2?

    asked on December 8, 2014
  80. physics

    If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 1.5 h, a swimmer makes exactly 77 laps in a swimming pool that is 27 m long. Determine the distance the swimmer traveled, the total displacement of

    asked on January 21, 2014
  81. Math

    A 1.00kg piece of aluminum at 90.0c in placed in 4.00 liters (4.00kg) of water at 25.0c. What is the final temperature(Tf)

    asked on November 8, 2012
  82. American History

    Which of the following directly led to the American Civil War? A. The Lecompton Constitution B. The secession of many Southern states from the union C. The decision in the Dred Scott v. Sandford case D. The election of Abraham Lincoln C?

    asked on April 3, 2015
  83. Physics

    Suppose the space shuttle is in orbit 430 km from the Earth's surface, and circles the Earth about once every 93.2 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational

    asked on July 8, 2012
  84. Chemistry

    What set of hybrid orbitals is used by Xe in XeO3F2? dsp2 d2sp3 sp3 dsp3 d2sp

    asked on March 2, 2016
  85. Math

    The above function is given: f(x)= sqrt of (2x-6)/(x-8) - Sarah describes the domain as [3, ∞). - Describe why her domain is incorrect. - Provide the correct domain for the function. (I sort of understand this).

    asked on October 13, 2015
  86. Stats

    The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have blue eyes c. Find the probability that one of the

    asked on April 30, 2013
  87. Chem

    Suppose that a stable element with atomic number 119, symbol Wr, has been discovered. (d) What would be the most likely charge of the Wr ion in stable ionic compounds? (e) Write a balanced equation that would represent the reaction of Wr with water. (f)

    asked on October 21, 2012
  88. chemistry

    From a 1M Tris solution, how is a 400ml of 0.2 M Tris prepared? I have no idea where to start

    asked on September 18, 2011
  89. chemistry

    An electron in the n = 5 excited state of a hydrogen atom emits a photon of 1281 nm light. To what energy level does the electron move? Any ideas on an equation for this? Is it some kind of backward version of Rydburg Eq?

    asked on February 5, 2011
  90. Economics

    Will the aggregate quantity of goods and services demanded become more sensitive or less sensitive to changes in the price level if an economy becomes closed (that is, as foreign trade disappears)? In terms of the AD/AS diagram, will the AD curve become

    asked on June 18, 2007
  91. History help!!!!!!!!

    Why did the colonists react to the Coercive Acts with boycotts and convening the First Continental COngresss? in 1764, the British Parliament passed the Sugar Act. Many of the colonists were unwilling to pay tax which was imposed - this is what started

    asked on September 3, 2006
  92. Chemistry

    A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution. A. unsaturated B. saturated C. dilute D. concentrated im pretty sure its C

    asked on February 25, 2015
  93. Physics

    The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 29 pounds is needed to stretch a spring 39 inches. How much force is required to stretch the spring 27 inches? Answer in units of lb

    asked on December 6, 2014
  94. science

    a large amount of potassium in plant food could cause the formation of MgKPO4:6H2O along with MAPH. what would be the effect on the calculated percentage of P2O5 in question 1 if MAPH were mixed in with your precipitate? would the %P2O5 in this mixture be

    asked on September 19, 2013
  95. Prob and Stats

    The Roper Organization conducted identical surveys 5 years apart. One question asked of women was Are most men basically kind, gentle, and thoughtful? The earlier survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. The later

    asked on September 5, 2011
  96. chemistry

    Consider a red flame color produced by excited lithium with a wavelength of 671 nm. What is the mass equivalent of 1 mol of photons of this wavelength? I can get as far as Js of E Can't seem to find equation to turn Js into mols, or photons into mols, for

    asked on February 5, 2011
  97. Math/Statistics

    The mean starting salary for graduates in the spring of 2004 was $36,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of $3,300. What percent of the graduates have starting salaries between

    asked on November 29, 2010
  98. Science

    When oxygen is present a. most cells utilize aerobic cellular respiration. b. most animal cells will carry on fermentation and produce lactic acid. c. most bacteria and yeasts carry on fermentation. d. two ATP molecules are produced for each glucose

    asked on February 26, 2007
  99. Chemistry

    What is the molarity of a bleach solution containing 6.6 g of NaOCl per liter of bleach? answer please

    asked on May 25, 2015
  100. Physics

    An airplane is flying in a horizontal circle at a speed of 104 m/s. The 88.0 kg pilot does not want the centripetal acceleration to exceed 6.15 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is

    asked on February 8, 2013


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