Most popular questions and responses by Elizabeth
  1. Health

    the heart is composed of how many loops

    asked on January 13, 2015
  2. Social Studies

    Which of the following is most closely associated with the idea of nullification? A.States' rights B.Tariffs** C.Foreign policy D.Suffrage

    asked on November 1, 2016
  3. math

    The box plots below show the average daily temperatures in January and December for a U.S. city: two box plots shown. The top one is labeled January. Minimum at 0, Q1 at 10, median at 12, Q3 at 13, maximum at 16. The bottom box plot is labeled December.

    asked on January 30, 2016
  4. Social Studies

    What is the answer I am freaking out, PLZ help!! Why did conflict arise between Henry II and Thomas Becket? A. Henry refused to appoint Becket as archbishop of England. B. Henry resisted the Norman invasion of England. C. Becket refused to recognize Henry

    asked on October 12, 2018
  5. CHEM

    is breaking an egg a chemical or physical change? is cooking an egg a chemical or physical change?

    asked on October 17, 2010
  6. physics

    A 30g ball rolls around a 40cm diameter L-shaped track at 60rpm. What is the magnitude of the net force that the track exerts on the ball? rolling friction can be neglected.

    asked on November 15, 2009
  7. Spanish

    I need to make each statement into a question using the interrogative words. Can someone revise the questions Adónde Cuándo Cuántos De dónde Dónde Por qué Qué Quién ¿ Dónde caminan Paco y Rosa? Paco y Rosa caminan a la biblioteca. ¿ De dónde el

    asked on September 22, 2013
  8. Health

    the muscular system is essential because it allows our bones to

    asked on January 12, 2015
  9. Language Arts

    Which of the following sentences contains a pronoun in the objective case? A. What costume should I wear to the party tonight? B. Maybe Martha will loan me something. C. Her costumes are always the best. D. She won first prize in a Halloween contest last

    asked on February 27, 2015
  10. I have a few science Questions I need checked, Plz

    Hi Guys, so, I only have 2 questions, But, I'm a little confused on all of them, could someone check for me One of the ways humans can preserve biodiversity Is habitat destruction habitat preservation*** habitat fragmentation poaching A country comissioner

    asked on December 7, 2017
  11. Science : Please Help!

    Many people who care about conserving natural resources would choose to use wind energy to power their homes. However, wind power is not an option for people in many parts of the coutnry. Explain what the benefits of wind power are and why it is not

    asked on May 18, 2014
  12. Math-Trigonometry

    Can someone help me with this problem. -A Ferris wheel has a radius of 37.8 feet. The bottom of the Ferris wheel sits 0.7 feet above the ground. You board the Ferris wheel at the 6 o'clock position and rotate counter-clockwise. A)Define a function, f that

    asked on April 30, 2017
  13. Calculus

    A metal cylindrical container with an open top is to hold 1 cubic foot. If there is no waste in construction, find the dimensions which will require the least amount of material.

    asked on October 13, 2012
  14. Physic

    Hi, I'm learning about simple harmonic motion of a mass-spring system and I've been working at 2 problems for the past hour. I believe I have the right formula and I know what the answers should be but Im getting a different answer. Can you explain it step

    asked on January 20, 2015
  15. Science

    Please help! Many people who care about conserving natural resources would choose to use wind energy to power their homes. However, wind power is not an option for people in many parts of the country. Explain what the benefits of wind power are and why it

    asked on May 18, 2014
  16. Art

    Hi, could someone check this for me, thx :) Why is it harder to find examples of 3D art rather than 2d art in early human history?? A) No early civilizations made 3D art B) 3D art is only part of the digital arts C) People have always perferred 2D art to

    asked on November 7, 2017
  17. Language Arts

    Read the following topic. How could you rewrite the topic to form a focused thesis statement? *Tablets and School* -Schools use tablets daily -The of tablets positively affects students achievement in school

    asked on May 22, 2015
  18. Calculus

    Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function

    asked on April 27, 2012
  19. math

    The store employee works 35 hours per week. Which inequality can be used to find the dollar value, x, of weekly sales that the employee must make to earn more than $400 per week?

    asked on March 31, 2017
  20. earth

    3. What can scientists learn from the rate at which radioactive elements decay?

    asked on December 10, 2013
  21. chemistry

    HCN(aq) + SO4-2(aq) HSO4-(aq) + CN -(aq) a. What is the Bronsted - Lowry acid in this equation? b. What is the Bronsted - Lowry base in this equation? c. What is the conjugate acid in this equation? d. What is the conjugate base in this equation?

    asked on May 7, 2012
  22. Mathematics

    A garrison of 1200 men has sufficient ratios for 25 days at the rate of 2400g per man per day. If 300 man join them and the ratios are reduced to 2000g per man per day,how long will the road last all of them? Thank you :)

    asked on March 13, 2012
  23. Physics

    At t=0 a particle starts from rest at x=0, y=0 and moves in the xy plane with an acceleration a=(4.0i+3.0j)m/s^2. Determine (a) the x and y components of velocity, (b) the speed of the particle, and (c) the position of the particle, all as a function of

    asked on September 12, 2013
  24. Physics

    A girl is skipping stones across a lake. One of the stones accidentally ricochets off a toy boat that is initially at rest in the water (see the drawing below). The 0.094-kg stone strikes the boat at a velocity of 14 m/s, 15° below due east, and ricochets

    asked on October 22, 2012
  25. Chemistry

    For the following reaction, Kp = 3.5 104 at 1495 K. H2(g) + Br2(g) 2 HBr(g) What is the value of Kp for the following reactions at 1495 K? (a) HBr(g) 1/2 H2(g) + 1/2 Br2(g) (b) 2 HBr(g) H2(g) + Br2(g) (c) 1/2 H2(g) + 1/2 Br2(g) HBr(g)

    asked on February 20, 2012
  26. Chemistry

    The vapor pressure of CCl3F at 300 K is 856 torr. If 11.5 g of CCl3F is enclosed in a 1.0 L container, will any liquid be present? If so, what mass of liquid?

    asked on February 19, 2010
  27. physics

    As a science project, you drop a watermelon off the top of the Empire State Building, 320 m above the sidewalk. It so happens that Superman flies by at the instant you release the watermelon. Superman is headed straight down with a speed of 36.0 m/s. How

    asked on July 25, 2008
  28. Math shopping discounts

    Situation: You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With Distribution

    asked on November 18, 2016
  29. Roosevelt honors geometry

    ray OC bisects

    asked on November 27, 2007
  30. Math-Ratios

    In a college library, there are 4 times as many nonfiction books as fiction books. A.Find the ratio of the number of nonfiction books to the number of fiction books. B.How many times the number of nonfiction books is the number of fiction books? C.Suppose

    asked on January 19, 2017
  31. social studies

    How is Paraguay different from the other countries in the Southern Cone? 1.Almost all of its people speak a South American Indian language. 2.It has a higher percentage of people with only European ancestry. 3.Most of its people are of purely of South

    asked on November 28, 2018
  32. Introduction to statistics

    A researcher would like to estimate the population proportion of adults living in a certain town who have at least a high school education. No information is available about its value. How large a sample size is needed to estimate it to within 0.19 with

    asked on July 17, 2014
  33. Physics

    Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by seven-time-winner Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do

    asked on October 20, 2012
  34. biology

    North American wolves can have gray fur or black fur. A single gene with two alleles codes for fur color. Information about the fur color of parents and offspring in four wolf families is shown below. Family 1 | gray fur x black fur | 3 gray fur : 2 black

    asked on January 2, 2019
  35. Physics

    At what positions is the speed of a simple harmonic oscillator half its maximum? That is, what values of x / X give v = ±vmax/2 , where X is the amplitude of the motion? Hello, I am so confused about this question. I am not really sure where to start.

    asked on July 24, 2016
  36. Ed Tech

    Before katie turns in the paper she typed she wants a peer to review it and give her feedback. katie uses her all in one printer to scan her edit,prints, and send them to her friend. An all in oneprinter is -Input device -Output device -Data storage device

    asked on September 10, 2015
  37. Physics

    (a) Find the electric field at x = 5.00 cm in Figure 18.52(a), given that q = 1.00X10^-6;C . (b) At what position between 3.00 and 8.00 cm is the total electric field the same as that for –2q alone? (c) Can the electric field be zero anywhere between

    asked on August 8, 2016
  38. Chemistry

    The solubility product for Ni(OH)2(s) is 1.6 ✕ 10−16. Calculate the value of ℰ° for the following half-reaction. Ni(OH)2 + 2 e− → Ni + 2 OH − I have no idea what equation to use or how to solve this problem

    asked on May 11, 2018

    A 0.63-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.22 m (relative to its unstrained length), the speed of the sphere decreases from 5.95 to 4.75 m/s. What is the spring constant of the spring? (The

    asked on December 1, 2012
  40. math

    Suppose you have a wallet with $5 bills, $10 bills, and $20 bills. If the probability of picking a $20 bill is 4/15, and the probability of piciing a $5 bill is 1/3, what is the probability of picking a $20 bill? a. 1/15 b. 1/5 c. 4/15 d. 2/5 **

    asked on May 19, 2016
  41. Physics

    In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer space. From stationary positions they push against each other. Bonzo flies off with a velocity of +1.7 m/s, while Ender recoils with a velocity of −2.7 m/s. (b) Determine the

    asked on October 22, 2012
  42. math

    You received a $100 gift certificate to a clothing store. The store sells t-shirts for $15 and dress shirts for $22. You want to spend no more than the amount of the gift certificate. You want to leave at most $10 of the gift certificate unspent. You need

    asked on December 4, 2018
  43. biology

    When exposed to bright sunlight, some people involuntarily sneeze. This reaction is known as a photic response. It is controlled by a single gene with two alleles, H and h. A man and a woman who sneeze when exposed to bright sunlight are both heterozygous

    asked on January 2, 2019
  44. College Chemistry

    A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate. a. How many moles of acetic acid and sodium acetate are present in 50.0 ml of solution? b. if we add 5.55 mL of 0.092M NaOH to the solution in part (a) how many moles of acetic acid ,

    asked on November 10, 2010
  45. math

    When a coin is tossed four times, sixteen equally likely outcomes are possible as shown below: HHHH HHHT HHTH HHTT HTHH HTHT HTTH HTTT THHH THHT THTH THTT TTHH TTHT TTTH TTTT Let X denote the total number of tails obtained in the four tosses. Find the

    asked on December 5, 2009
  46. Physics

    Your ear is capable of differentiating sounds that arrive at the ear just 1.00 ms apart. What is the minimum distance between two speakers that produce sounds that arrive at noticeably different times on a day when the speed of sound is 340 m/s?

    asked on July 20, 2016
  47. English

    "Tolerance is the word used most often when this kind of coexistence succeeds, but tolerance is a vanilla-pudding word, standing for little more than the allowance of letting others live unremarked and unmolested. Pride seems excessive, given the American

    asked on September 16, 2015
  48. math

    Dina and Masha start out on a bike path 10 km long at the same time. When Dina reaches the end of the 10 km, Masha still has 2 km left to bike. If Dina’s biking speed is 5 km/h, find Masha’s biking speed.

    asked on May 15, 2016
  49. Physics

    A tow truck is pulling a car out of a ditch by means of a steel cable that is 9.3 m long and has a radius of 0.50 cm. When the car just begins to move, the tension in the cable is 1070 N. How much has the cable stretched? Answer in m

    asked on November 30, 2012
  50. Math

    Victoria has a 2-pound package of flour. She uses 2/5 of the flour to make bread. Find the weight of the package of flour that she has left. Express your answer as a decimal.

    asked on December 21, 2016
  51. Chemistry

    A piece of solid carbon dioxide, with a mass of 6.8 g, is placed in a 4.0 L otherwise empty container at 23°C. a) What is the pressure in the container after all the carbon dioxide vaporizes? b)If 6.8 g solid carbon dioxide were placed in the same

    asked on February 9, 2012
  52. Chemistry

    A piece of solid carbon dioxide, with a mass of 6.8 g, is placed in a 4.0 L otherwise empty container at 23°C. a) What is the pressure in the container after all the carbon dioxide vaporizes? b)If 6.8 g solid carbon dioxide were placed in the same

    asked on February 9, 2012
  53. Physics

    The power radiated by the sun is 3.90 1026 W. The earth orbits the sun in a nearly circular orbit of radius 1.50 1011 m. The earth's axis of rotation is tilted by 27° relative to the plane of the orbit (see the drawing), so sunlight does not strike the

    asked on March 26, 2013
  54. Language Arts

    You are trying to convince your community council to install recycling bins at the local park. Which of the following types of writing could you use most effectively to try to change the situation? -A reflective essay about the fun that you and your

    asked on May 22, 2015
  55. Chemistry

    Consider a 1.0 L container of Neon gas at STP. Will the average kinetic energy, average velocity,and frequency of the collisions of gas molecules with the walls of the container increase, decrease, or remain the same under each of the following conditions?

    asked on February 24, 2017
  56. Chemistry

    At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.81 atm and 0.20 atm, respectively

    asked on February 20, 2012
  57. Math

    Mark is building a custom wooden frame around his flower bed.The length of the frame is 5.45 feet, and the width of the frame is3.275 feet. What is the area of the flower bed without rounding?_________square feet

    asked on December 12, 2015
  58. Health

    if you catch a cold which component of blood do you rely on to help attack the virus that has invaded your blood stream

    asked on January 13, 2015
  59. Chemistry

    The equilibrium constant Kp for the reaction below at 700°C is 0.76 atm. CCl4(g) C(s) + 2 Cl2(g) Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700°C

    asked on February 20, 2012
  60. Physics

    (a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the surface at a 30.0º incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel

    asked on July 27, 2016
  61. Chemestry

    If an ion contains 50 protons,68 neutrons and 48 electrons.what is its symbol?

    asked on August 1, 2014

    ray OC bisects

    asked on November 28, 2007
  63. Math

    Are there any connections Academy users here?

    asked on May 30, 2018
  64. math

    Name the position of the first digit of the quotient. 1. 832/4 2. 217/7 I don't understand. Someone please explain to me.

    asked on April 8, 2014
  65. math

    A physics test has twenty questions worth 100 points. The test consists of true /false questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test ?

    asked on March 17, 2016
  66. Physics

    A 15.0-kg block rests on a horizontal table and is attached to one end of a massless, horizontal spring. By pulling horizontally on the other end of the spring, someone causes the block to accelerate uniformly and reach a speed of 5.00 m/s in 0.460 s. In

    asked on November 30, 2012
  67. Chemistry

    A compressed gas cylinder contains 1.00 103 g of argon gas. The pressure inside the cylinder is 2096 psi (pounds per square inch) at a temperature of 19°C. How much gas remains in the cylinder if the pressure is decreased to 656 psi at a temperature of

    asked on February 9, 2012
  68. Physics

    Two billiard balls with identical masses and sliding in opposite directions have an elastic head-on collision. Before the collision, each ball has a speed of 20 cm/s. Find the speed of each billiard ball immediately after the collision.

    asked on April 20, 2011
  69. physics

    A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s. Determine the normal force exerted by the road on the car. Determine the normal force exerted by the car on the 72-kg driver. Express your answer

    asked on October 11, 2010
  70. Physics

    On July 19, 1969, Apollo II's orbit around the moon was adjusted to an average orbit of 111km. The radius of the moon is 1785 km and the mass of the moon is 7.3e22 kg. a) How many minutes did it take to orbit once? b) At what velocity did it orbit the

    asked on October 30, 2007
  71. 10th Grade Literary Essay

    What does F. Scott Fitzgerald suggest about the state of the American Dream, the people who pursue it, and the impact of that pursuit through his depiction of Jay Gatsby and the people in Gatsby’s life? Include specific examples, quotations, and

    asked on September 28, 2012
  72. Science

    Why are fossil fuels not renewable? A. There is a abundant supply of fossil fuels. B. It is a widley used source of energy. C. It takes hundreds of millions of years to form them? D. They are replaced within a short period of time.

    asked on May 30, 2018
  73. Math

    Why is 25 a composite number help!!

    asked on December 3, 2016
  74. Algebra

    1)More than 450 students went on a field trip. Ten buses were filled and 5 more students traveled in a car. a) Write an inequality to represent the situation. Be sure to define your variable. b) Solve the inequality to find the minimum number of people on

    asked on September 17, 2016
  75. Chemistry

    Show how you would calculate the % yield of hydrogen if 40.0 grams of magnesium react with an excess of nitric acid producing 1.70 grams of hydrogen gas. Mg + 2 HNO3 ---> Mg(NO3)2 + H2

    asked on March 30, 2016
  76. Social Studies

    Muslims must A. Pray eight times a day B. Save all their money C. Fulfill the Five Pillars of Islam d. Live in Makkah

    asked on May 31, 2018
  77. Statistics

    A sample of 106 body temperatures resulted in a mean of 98.2 degrees and a standard deviation of .62 degrees. Use these sample statistics to construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.

    asked on July 20, 2015
  78. Math

    A ferris wheel is 30 meters in diameter and boarded in the six o'clock position from a platform that is 10 meters above the ground. The wheel completes one full revolution every 10 minutes. At the initial time t=0 you are in the twelve o'clock

    asked on December 10, 2012
  79. math

    a ski slope at a mountain has an angle of elevation of 25.2 degrees. the vertical height of the slope is 1808 feet. how long is the ski slope. show diagram

    asked on December 14, 2009
  80. computers

    Which of the following html tags would you use after a table? A. B. C. D. i say b.

    asked on February 29, 2012
  81. Physics

    Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.8 kg · m2 and an angular velocity of +6.7 rad/s. Disk B is rotating with an angular velocity of -8.9 rad/s. The two disks are then linked together without the aid of any

    asked on November 16, 2012
  82. physics

    A 3.00x10^-3 kg lead bullet enters a target with a speed of 2.00x10^2 m/s and comes to rest within the target. Calculate the rise in temperature of the bullet assuming that 80.0% of the heat produced is absorbed by the bullet. The Specific heat of lead is

    asked on March 25, 2012
  83. Science

    How did Darwin and Lamarck differ in their thinking about change in species? Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism’s environment. Darwin thought that change

    asked on May 14, 2015
  84. maths

    What is the gradient of a line that has an angle of inclination of 75°? Enter the answer, rounded to 4 significant figures in the box below. the answer should be a number. ???

    asked on May 8, 2011
  85. Chemistry

    Consider the reaction below. 3 O2(g) --> 2 O3(g) At 175°C and a pressure of 128 torr, an equilibrium mixture of O2 and O3 has a density of 0.168 g/L. Calculate the Kp for the above reaction of 175°C

    asked on February 20, 2012
  86. Math

    Jason received an invoice for $5,000, and the invoice was dated on August 26 with terms of 2/10, n/45 EOM. Please answer the following questions: (1) How much did Jason owe if the bill is paid by September 26? (2) When will be the last day that Jason can

    asked on September 15, 2016
  87. Chemisty

    A 25-mL sample of 0.160M solution of NaOH is titrated with 17 mL of an unknown solution of H2SO4. What is the molarity of the sulfuric acid solution? A. 0.004M H2SO4 B. 0.235M H2SO4 C. 0.117M H2SO4 D. 0.002M H2SO4

    asked on February 18, 2014
  88. related rates calculus problem

    A balloon is being filled with air at a rate of 3 cubic meters per minute. Find the rate at which the radius is changing when the volume is 113.0973355 cubic meters.

    asked on December 30, 2010
  89. physics

    A 10g marble is spun so that it rolls at 150rpm around the inside of a steel tube. The tube has a 12cm diameter. Assume the rolling resistance is small enough for the marble to maintain 150rpm for several seconds. During this time, will the marble spin in

    asked on November 15, 2009
  90. Physics

    A volleyball is spiked so that its incoming velocity of +3.6 m/s is changed to an outgoing velocity of -16 m/s. The mass of the volleyball is 0.27 kg. What impulse does the player apply to the ball? Answer will be in kg*m/s

    asked on October 22, 2012
  91. Science

    A gene is to a chromosome as _______. a) a pea is to as a pod b) a front is to a back c) a bike is to a car d) a building is to a window I think it is a.

    asked on October 5, 2016
  92. Algebra

    A baseball player hits a baseball into the air with an initial vertical velocity of 48 feet per second from a height of 3 feet. 8. Write an equation that gives the baseball’s height as a function of the time (in seconds) after it is hit. 9. After how

    asked on March 31, 2013
  93. Language Arts

    Which of the following sentences uses a predicate noun? A. When you leave, I will feel sad. B. My sister is their most valuable player. C. Their most valuable player is she. D. I will be saddened when you leave. Thank you for any help you give!

    asked on February 28, 2015
  94. art

    why would an artist chose to use harmony in a piece of artwork?

    asked on November 30, 2014
  95. Physics

    Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle, as shown in the drawing. The mass of the truck and its contents is 8340 kg. Find the magnitudes of the forces exerted by the ground on

    asked on November 15, 2012
  96. college Physics

    A car is traveling at 7.0 m/s when the driver applies the brakes. the car move 1.5m before it comes toa complete stop. if the car had been moving at 14m/s how far would it have continued to move after the brakes were applied? assume the braking force is

    asked on October 10, 2010
  97. math

    Solve each inequality 1. m-75= 3. p+5

    asked on November 18, 2016
  98. Geography

    Whereas reapportionment adjusts the amount of political representation give to a certain geographical area, redistricting adjusts A) country, state and/or county boundaries. B) population size. C) the gerrymander. D) Federal lands. E) the geographical

    asked on March 26, 2016
  99. Language Arts

    Which word has a meaning similar to prodigy? -Statue -Babysitter -Athlete -Wonder**

    asked on September 17, 2015
  100. Physics

    By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 2.75 m/s and v2 = 1.65 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor.

    asked on October 22, 2012


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