Most popular questions and responses by Ally
  1. Science Help PLEASE!!

    1. What happens to the levels of surface water and groundwater during a drought? Surface water and groundwater levels increase during drought. Surface water and groundwater levels decrease during drought. There is no change in the levels of surface water

    asked on March 11, 2014
  2. Social Studies

    What were some influences on self-government? Select all that apply. Commentaries on the laws of England** The Columbian exchange English bill of rights Poor Richard's almanac**

    asked on September 21, 2016
  3. physics

    In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will

    asked on May 8, 2012
  4. physics

    suppose a treadmill has an average acceleration of 4.7 x 10^-3 m/s^2. a. how much does its speed change after 5.0 min? b. if the treadmill's initial speed is 1.7 m/s, what will its final speed be?

    asked on September 3, 2010

    Help Please Can u check my answers? < = my answer If you do not experience some pain from your workouts, you are probably wasting your time: A.myth < B.fact You should still watch what you eat when you are exercising, in order to maintain a healthy weight:

    asked on March 4, 2016
  6. Chemistry

    Is PbI2 soluble in water or not? Following the solubility rules for ionic compounds, salts containing Pb are insoluble and iodide salts are soluble, so can it be both?

    asked on April 17, 2015
  7. Physics

    A horizontal uniform bar of mass 2.6kg and length 3.0m is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached a distance 0.65m from the other end. A monkey of mass 1.3kg walks from one end of the

    asked on May 2, 2018
  8. English

    I have two questions for english that I honestly don't know… I put what I think it is but I think its completely wrong… 1. Which of the following is a possible setting for works of American literary realism? Check all that apply. a. American West* b.

    asked on January 15, 2015
  9. Language

    which sentence has proper subject-verb agreement? even my cousin steve feel sad today. even my cousin steve look sad today. even my cousin steve feels sad today.*** even my cousin steve looking sad today.

    asked on October 13, 2016
  10. Language

    which of the following words from the poem has a negative connotation? splendor vibrate murky fringed**

    asked on October 17, 2016
  11. Computer Science

    You try to run the CHKDSK utility from a command prompt but you keep getting an error message that you need to run it in Elevated Mode. How do you correct this? Reboot the computer in SAFE Mode and then run CHKDSK from a command prompt. Open command prompt

    asked on March 12, 2015
  12. history

    how did washington gain control of boston? he sent 16,000 troops to launch a surprise attack on the british fort protecting boston. he surrounded the harbor giving them no option other than to surrender. he strategically placed cannons overlooking the

    asked on September 29, 2016
  13. Math

    18 students in a class play baseball. 17 students in the class play basketball. 30 students in the class play either or both sports. Select the vend diagram that shows the number of students who play basketball and baseball. A. Baseball 13 (5) 12

    asked on March 10, 2015
  14. eng

    In Ray Bradbury’s short story “A Sound of Thunder,” which of Mr. Eckels’s character traits leads to drastic consequences for the rest of the world? (1 point) his lack of curiosity his carelessness his fearfulness*** his greed

    asked on January 19, 2017
  15. Math/Piecewise functions

    Write a piecewise definition for the tax due T(x) on an income of x dollars When x

    asked on September 22, 2013
  16. Chem

    RXN #1: H2 (g) + O2 (g) --> H2O2 (l) ; delta-H =? Calculate the enthalpy change (delta-H1) for the reaction above (RXN #1) using the information below and Hess' Law. RXN A: H2O2 (l) --> H2O (l) + 1/2 O2 (g); delta-H=-98.0 kJ/mol RXN B: 2 H2 (g) + O2 --> 2

    asked on July 12, 2011
  17. Chemistry

    If BaCO3 is placed in an evacuated flask, what partial pressure of CO2 will be present when the reaction reaches equilibrium? 298K BaCO3(s)-->BaO(s)+CO2(g)

    asked on August 2, 2010
  18. college physics 44

    An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before

    asked on April 15, 2012
  19. Social Studies

    What was the basic economic structure established by England? import/export economy? mercantilism? market economy? capitalism?*** Am I wrong?

    asked on September 21, 2016
  20. Introduction to Computers

    What is a limiting factor of EFS when compared to BitLocker?

    asked on February 23, 2015
  21. @ elena

    In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will

    asked on May 8, 2012
  22. History

    Why did Adams increase the size of the American navy? A)He wanted to prepare for all-out war on Britain. B He hoped it would deter more attacks by French ships.*** C)He needed to use tax money to fund an increase in military spending. D)Congress passed a

    asked on November 15, 2016
  23. Social Studies!

    What policy did President Washington follow during the period of war in Europe following the French Revolution? A. He remained neutral toward all European powers to avoid conflict*** B. He acted to promote democracy across Europe C. He promised to fight

    asked on September 29, 2016
  24. Chemistry

    100g of a saturated solution of KNO3 was cooled from 80 degrees to 50 degrees. What mass of KNO3 would be expected to crystallise out of the solution?

    asked on July 28, 2014
  25. chemistry

    Helpful steps? Calculate the predicted atomic radius for potassium, K, given the atomic radius of rubidium, Rb, (0.247 nm) and cesium, Cs, (0.265 nm).

    asked on April 23, 2014
  26. Calc 3

    Jessica and Matthew are running toward the point P along the straight paths that make a fixed angle of θ (Figure 1). Suppose that Matthew runs with velocity va (m/s) and Jessica with velocity vb (m/s). Let f(x,y) be the distance from Matthew to Jessica

    asked on October 3, 2018
  27. Math - Functions

    The research department in a company that manufactures AM/FM clock radios established the following cost, and revenue functions: R(x) = x(50-1.25x) C(x) = 160 + 10x where 0 < x < 20. a) Determine when R = C (to the nearest thousand units. e.g. 6.247)

    asked on September 24, 2013
  28. Math

    Angelina goes to the library every 7 days.She goes to the market every 4 days.Today August 1, Angelina goes to both the library and the market.How many more time will she go to both places on the same day for the reminder of the year?

    asked on August 27, 2016
  29. physic

    Part 1 A 3.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 30.0 ◦ with the horizontal, as shown in the figure. The acceleration of gravity is 9.81 m/s2. If the coefficient of kinetic

    asked on February 25, 2011
  30. Art

    Valley of the shadow of death by Roget Fenton 1. How does roger Fenton use visual composition in valley of the shadow of death to depict the loss of war? A. Cannonballs in a barren landscape hint at powerful destruction B. Cannonballs are a reminder of a

    asked on March 9, 2015
  31. MATH

    A contractor purchases gravel one cubic yard at a time. (a) A gravel driveway L yards long and 6 yards wide is to be poured to a depth of 1 foot. Find a formula for n(L), the number of cubic yards of gravel the contractor buys, assuming that he buys 12

    asked on March 13, 2016
  32. phy

    with an average acceleration of -0.50 m/s^2, ho wlong will it take a cyclist to bring a bicycle with an intitial speeed of 13.5 m/s to a complete stop?

    asked on September 3, 2010
  33. psychology

    Ryan was purchasing a new garden hose at Wal-Mart when he heard raised voices in the next aisle. When the cart came around the corner, he had to move quickly to dodge an exploring preschool age child followed by an “out of control” mother. The mother

    asked on July 11, 2019
  34. Chem

    which of the following statements is true regarding electromagnetic radiation? Options: 1. electromagnetic radiation with a wavelength of 600 nm travels faster than that with a wavelength of 400 nm. 2. the frequency of electromagnetic radiation determines

    asked on July 13, 2010
  35. Calc 3

    The region W is the cone shown below. The angle at the vertex is 2π/3, and the top is flat and at a height of 5/sqrt(3). Write the limits of integration for ∫WdV in the following coordinates (do not reduce the domain of integration by taking advantage

    asked on March 26, 2019
  36. english

    In the poem "I will pronounce your name" the speaker uses sensory details to appeal to all of the following senses except: A. hearing B. sight C. smell D. touch Please help thank you!

    asked on November 8, 2017
  37. Art

    1. Realists reacted to the industrial revolution by creating what types of paintings? A. Images of the wealthy B. Images of the middle class C. Images of soldiers D. Images of despair D?

    asked on March 9, 2015
  38. Social Studies CHECK MY ANSWERS

    How did the economy of South Carolina change after the Civil War? A. Several industries developed in the state. B. Most freedmen became landowners. C. Cotton was no longer the chief crop. D. Former slaves did not provide farm labor. Is it D

    asked on March 22, 2016
  39. Chemistry

    What volume of oxygen gas is needed to react completely with 0.677 L of carbon monoxide gas (CO) to form gaseous carbon dioxide? Assume all volume measurements are made at the same temperature and pressure. Thanks in advance for all help!!

    asked on March 9, 2015
  40. math

    In certain deep parts of oceans, the pressure of sea water, P , in pounds per square foot, at a depth of d feet below the surface, is given by the following equation: P=12+8d/9 If a scientific team uses special equipment to measures the pressure under

    asked on September 4, 2019
  41. La

    which of the following sentences includes a predicate pronoun? justin and meg are the winners of the contest. the winners of the contest are they. the winners of the contest are justin and meg. the winners of the contest are excited.***

    asked on October 13, 2016
  42. chemistry

    Write the balanced net ionic equation for each of the following: 1) The reaction of dilute nitric acid with solid aluminum oxide. 2) The reaction of nitrous acid (HNO2) with potassium permanganate to produce nitrate and Mn(II) ions. Thanks for any help.

    asked on September 18, 2006
  43. language arts

    in “concrete mixers “ what seems to be the speakers feelings about the concrete mixers ?

    asked on January 24, 2018
  44. Geometry

    What is the answer to #17 on the geometry a unit 3 lesson 6 test?

    asked on August 21, 2019
  45. Chemistry

    A buffer system contains 0.30 M NH4+ and 0.15 M NH3. pKa of NH4+ is 9.25. How many moles of NaOH must be added to 1.00 L of this solution to increase the pH to 9.25? Hint: What is the (NH3) / (NH4+) when the pH=pKa?

    asked on May 10, 2016
  46. Chemistry

    Help please: A 0.199-g sample of unknown metal (X) reacts with hydrochloric acid to produce 88.5 mL of "wet" gas at 20 °C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 °C is 18 mm Hg.) X(s) + 2 HCl(aq) → XCl2(aq) +

    asked on April 17, 2014
  47. Chemistry

    How would I graph this: (I don't understand the whole with [1/volume] (units=1/mL) on the X-axis ) According to Boyle's Law, pressure is inversely proportional to volume, so prepare a graph of the data, with [1/volume] (units=1/mL) on the X-axis and

    asked on April 17, 2014
  48. Calc 3

    Show that the projection into the xy-plane of the curve of intersection of the parabolic cylinder z=1−2y^2 and the paraboloid z=x^2+y^2 is an ellipse. Find a vector-parametric equation r→1(t)=⟨x(t),y(t),z(t)⟩ for the ellipse in the xy-plane.

    asked on January 29, 2019
  49. Calculus

    Consider a rectangle cardboard box without top and bottom. The diagonal of the box has length 1. Use lagrange multipliers to find the maximum surface area of the paper used to make this box. What are the dimensions of this optimal box?

    asked on March 29, 2019
  50. Chemistry

    A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL of "wet" gas at 20 °C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 °C is 18 mm Hg. Help please?

    asked on April 23, 2014
  51. physics

    The initial kinetic energy imparted to a 0.72 kg bullet is 1777 J. The acceleration of gravity is 9.81m/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 25, 2011
  52. Physics

    the coefficient of kinetic friction between both blocks and the table is .200. determine the accelerations of blocks A and B each of which has a mass of 5.0kg The diagram shows a table with two blocks labeled A and B on them. A is connected to a rope that

    asked on January 2, 2017
  53. Chemistry

    Given the following general reaction: A + 2B + 3C -> P + 4Q. Show how the change in concentration of C with time is related to the change in concentration of A, B, P, and Q with time.

    asked on March 6, 2019
  54. Math that needs an answer in the next 5-10 min!!!

    Triangle ABC is similar to triangle DEF. Side AB is , and side DE is 6. The scale factor of ABC:DEF is 9. A) TRUE B) FALSE I think its A but I'm not entirely sure... PLZ HELP ASAP!!

    asked on February 25, 2016
  55. English

    One strategy for writing an effective conclusion to an essay is to A. remind readers of the relevance of the topic. B. Introduce the conclusion with a signaling phrase, such as "In conclusion," or "To sum things up." C. introduce new supporting evidence

    asked on April 18, 2019
  56. physics

    On the way to the moon, the Apollo astronauts reach a point where the Moon’s gravitational pull is stronger than that of Earth’s. Find the distance of this point from the center of the Earth. The masses of the Earth and the Moon are 5.98 × 1024 kg and

    asked on January 23, 2019
  57. Alegebra

    N is the number of buttons in a sewing box. N is more than 40 but less than 80. When N is divided by 5 , the remainder is 2. When N is divided by 7, the remainder is 4. What is the value of N?

    asked on June 26, 2012
  58. Calculus

    Values of f(x,y) are given in the table below. Let R be the rectangle 1≤x≤1.6, 2≤y≤3.2. Find a Riemann sum which is a reasonable estimate for ∫Rf(x,y)da with Δx=0.2 and Δy=0.4. Note that the values given in the table correspond to midpoints.

    asked on March 11, 2019
  59. math

    At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the beginning?

    asked on March 5, 2015
  60. Science

    Which reaction is exothermic? A. Cellular respiration B. Photosynthesis C. Baking soda + vinegar D. Melting Ice***

    asked on February 24, 2016
  61. Calc 3

    Let S be the square in the xy-plane, oriented with the normal pointing in the positive z-direction. Estimate ∬S F⋅dS where F is a vector field whose values at the labeled points are F(A)=⟨9,3,5⟩, F(C)=⟨9,8,−4⟩, F(B)=⟨−9,8,−7⟩,

    asked on April 16, 2019
  62. Math

    An appliance company has a warehouse and two terminals. To minimize shipping costs, the manager must decide how many appliances should be shipped to each terminal. There is a total supply of 1200 units in the warehouse and a demand for 400 units in

    asked on September 27, 2013
  63. Physics

    A spring force constant 210 N/m vibrates with an amplitude of 28.0 cm when .250 kg hangs from it. What is the equation describing this motion as a function of time? Assume that the mass passes through the equilibrium point with positive velocity at t=0. At

    asked on January 19, 2012
  64. science-chem

    first, thanks so much Bob for helping me!!!! will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g

    asked on September 17, 2009
  65. Math

    Does the table represent an exponential function? x 1 2 3 4 y –1 –8 –27 –64, I think it does.

    asked on February 21, 2018
  66. Calc 3

    Calculate the velocity and acceleration vectors, and speed for r(t)=⟨cos(6t),sin(t),sin(6t)⟩ when t=5π/6 .

    asked on February 1, 2019
  67. Math

    A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most 70 hours; the second machine at most 40 hours; and the third machine at most 90 hours. The first product requires 2 hours on machine 1, 1

    asked on September 27, 2013
  68. Science :check my answers

    Here are some questions I had for hw, I answered some of them, can someone check my answers and help me with the ones i didn't answer, thanks: 1.Which constellations are visible from Canada in all seasons? My Answer:Ursa Major, Ursa Minor, Lynx,Cephus,

    asked on May 30, 2013
  69. statistics

    a company manufactures calculators in batches of 45 and claims that the rate of defects is 4%.find the probability of getting exactly 2 defects in a batch of of 45 if the rate of defects is 4%.if the store receives a batch of 45 calculators and finds that

    asked on December 6, 2009
  70. Calc 3

    Let C be the straight line curve between the points (0,5) and (1,0). Let N be the unit normal vector field on C, oriented so that it points away from the origin. Let F:R2→R2 be the vector field defined by F(x,y)=(x,11). Find the flux of F across the

    asked on April 5, 2019
  71. science

    Carbon dioxide is obtained from the air and changed into carbohydrates and oxygen during the process of A) fossilization. B) respiration. C) digestion. D) photosynthesis

    asked on January 29, 2014
  72. Chemistry

    Determine the total number of electrons transferred in the following balanced reaction. 4 MnO4– (aq) + 12 H3O+ (aq) → 4 Mn2+ (aq) + 5 O2 (g) + 18 H2O (g)

    asked on August 8, 2010
  73. Chemistry

    I was wondering if you could help me with this problem. If the reaction proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.34 kg SO2 reacts with an exfess of CaCO3 and O2? Thanks for your help. Write the equation for the reaction

    asked on July 9, 2007
  74. Calc 3

    Evaluate the line integral ∫5ydx+2xdy where C is the straight line path from (2,4) to (5,9).

    asked on April 4, 2019
  75. math

    a bathtub is being filled at a rate of 2.5 galons per minute.the bathtub will hold 20 gallons of water how long will it take to fill the bathtub?

    asked on February 9, 2016
  76. chemistry

    What volume of oxygen gas can be collected at 1.26 atm pressure and 2.00◦C when 39.7 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆/MnO2 −−−−→ 2 KCl(s) + 3 O2(g) Answer in units of L.

    asked on March 9, 2015
  77. Calculus

    Let f(x,y)=(x-1)/(2x+y). Find the domain of f.

    asked on March 10, 2019
  78. Math

    An investment broker wants to invest up to $20,000. She can purchase a type A bond yielding a 10% return on the amount invested, and she can purchase a type B bond yielding a 15% return on the amount invested. She wants to invest at least as much in the

    asked on September 28, 2013
  79. astronomy

    Fill in the blank: The Earth may have gained its water and volatile gases from collisions with _______ .

    asked on October 24, 2010
  80. Math/Probability

    Anna and bob play a game in which Anna begins by rolling a fair dice, after which bob tosses a fair coin. They take turns until one of them wins. Anna wins when she rolls a 6. Bob wins when the coin lands on heads. What is the probability that Anna will

    asked on May 31, 2010
  81. Chem

    Determine the boiling point of a sol'n containing 96.8 g MgBr2 in 2014 g of water.

    asked on February 23, 2017
  82. Social Studies CHECK MY ANSWERS

    Which criticism did Tillman direct at Conservatives? A.They controlled the office of governor. B.They didn't think blacks should vote. C.They believed in white supremacy. D.They didn't care about common people. Is it C

    asked on March 22, 2016
  83. Math

    A carpenter is assigned the job of expanding a rectangular deck where the width is one-fourth the length. The length of the deck is to be expanded by 10 feet, and the width by 6 feet. If the area of the new rectangular deck is 128 ft^2 larger than the area

    asked on July 17, 2015

    If 0.500L of dry N2 was bubbles into an inverted flask through water to saturate it at 25.0C, what would be the total volume at the lab atmospheric pressure. Our pressure was : 757.5 mmHg

    asked on July 3, 2012
  85. Chemistry

    How much heat is required to change 10 grams of ice at 0 deg. C to steam at 100 deg C?

    asked on February 23, 2010
  86. biology

    There is a large amount of catalase found in liver. Do you think that your liver breaks down more Hydrogen Peroxide in the summer or winter? Explain. -My teacher said this is a trick question and I think it neither summer or winter but I'm not sure

    asked on September 19, 2019
  87. Calc 3

    Consider a piece of wire with uniform density. It is the quarter of a circle in the first quadrant. The circle is centered at the origin and has radius 3. Find the center of gravity (x¯,y¯) of the wire.

    asked on April 3, 2019
  88. Calc 3

    The oracle function f(x,y) is presented below. For each point (x,y) you enter the oracle will tell you the value f(x,y). Estimate the partial derivative of the function at (1.6,−0.0999999999999999) using the Newton quotient definition.

    asked on February 13, 2019
  89. Biology

    Calculate the energy yield of glycolysis and cellular respiration per glucose molecule. Distinguish between substrate-level phosphorylation and oxidative phosphorylation.

    asked on October 13, 2019
  90. Calc 3

    Find ∫CF⋅dr where C is a circle of radius 1 in the plane x+y+z=4, centered at (3,2,−1) and oriented clockwise when viewed from the origin, if F=4yi−3xj+3(y−x)k

    asked on April 23, 2019
  91. Calc 3

    Given the matrix A= a 6 5 a -8 8 7 9 a find all values of a that make |A|=0. Give your answer as a comma-separated list.

    asked on February 10, 2019
  92. physics

    You weigh 730 N. What would you weigh if the Earth were two times as massive as it is and its radius were six times its present value? Answer in units of N.

    asked on January 23, 2019
  93. Calc 3

    The plane containing the lines r1(t)=⟨1,−4,−1⟩+t⟨1,2,−2⟩ and r2(t)=⟨1,−4,−1⟩+t⟨1,0,3⟩ has scalar equation

    asked on September 11, 2018
  94. Calc 3

    Find the maximum and minimum values of the function f(x,y,z)=x+2y subject to the constraints y^2+z^2=225 and x+y+z=1. Maximum and minimum value is?

    asked on March 6, 2019
  95. Math

    Remove the xy-term by rotation of axes, reduce the resulting equation to standard form and trace the curve on the new axes: 13x^2-10xy+13y^2=72

    asked on May 18, 2015
  96. Business Mathematics

    During the 2011 student's orientation at Unam, it was reported that number of male students who attended the orientation was nine hundred and forty less than four times the number of female students. a) From the statement above, formulate a mathematical

    asked on April 18, 2011
  97. physics

    A woman pushes a lawn mower with a con- stant force of 112 Newtons at an angle of 37 with respect to the horizontal. The lawn mower moves at a speed of 20 cm/sec. What is her power output? (1 hp = 746 Watts)

    asked on February 25, 2011
  98. Government

    With Schumpeter's theory of "creative destruction" in mind, what might be the next technological wave that will change or significantly influence the Texas economy? Why?

    asked on January 28, 2019
  99. Health Science

    What is the pulse deficit if an apical pulse is 112 and the radial pulse is 88?

    asked on April 19, 2012
  100. Science

    compare the number of valence electrons an oxygen, O, atom has with the number of valence electrons a selenium, Se, atom has. are oxygen and selenium in the same period or group?

    asked on January 23, 2011


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