Most popular questions and responses by emma
  1. Language Arts

    Hi! I just need someone to check my work please! :) Thanks! 1. Which of these is the defining characteristic of a comparison-and-contrast essay? A. Clear thesis statement. B. Organizational structure. C. Reliable sources. D. Similarities and differences

    asked on February 17, 2017
  2. Chemistry

    What would the net ionic equation be for : HBr (aq) + KOH (aq) = KBr + H2O

    asked on October 15, 2017
  3. Math

    Hi! I just want someone to check my answers please! I cannot provide you with any pictures as I have gotten them off of my schools website. You cannot access these pictures because you have to be logged in. 1. Andrea drew triangle JKL as shown. A. The sum

    asked on February 16, 2017
  4. Language

    In "All Together Now," why does Barbara Jordan most likely mention the conflict in Bosnia? A.It shows that people of different ethnic backgrounds can live in peace. B.It shows that improvements in race relations are still necessary despite past progress.

    asked on December 2, 2015
  5. Chemistry

    A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2*10^-4M and 1.5M, respectively, in 1.0-L half-cells. The initial voltage of the battery is 2.83V with the standard

    asked on May 2, 2010
  6. Chemistry

    What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.40 L of an NaOH solution with a pH of 10.5?

    asked on March 17, 2013
  7. calculus

    In the space below, provide the smaller of the two positive integers that add to 40 and have the largest possible product

    asked on April 22, 2015
  8. history

    How did feudal monarchs in the High Middle Ages centralize power? need explanation

    asked on October 11, 2016
  9. math miss.sue can u plz check me answers plz

    which of the following appears to be an irrational number? A. 3.7272727272... B. the root of 64 C. -6/25 D. 0.73303330...

    asked on November 19, 2015
  10. math

    Mr. Smith is purchasing a $190000 house. The down payment is 20% of the price of the house. He is given the choice of: (A) a 20-year mortgage at a rate of 6%. Find: (i) The monthly payment: $ (ii) The total amount of interest paid: $

    asked on May 21, 2012
  11. calculus

    If 800 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? Answer to the nearest square foot without commas. For example, if the answer is 1,000, write 1000.

    asked on April 22, 2015
  12. science

    A banana turning brown when exposed to the air is an example of

    asked on November 15, 2016
  13. History

    Hey! Just Want A Quick Check Over My Answers! 1. How Did The Zimmermann Note Lead The United States Closer To War? A. It Caused The United States To End Diplomatic Relations With Germany. * B. It Resulted In More U-Boat Attacks On American Ships. C. It

    asked on February 23, 2017
  14. Economics

    Can someone check my answers? "Explain how unemployment affects the following groups. Give at least 3 examples for each of the groups; Laborers, Businesses, and Government" Laborers: 1) No longer has a job 2) Families can hurt from lack of money 3)Poor

    asked on November 11, 2015
  15. Math

    A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she opens the parachute.

    asked on March 8, 2016
  16. science

    A geneticist is studying a pedigree that shows the family history of a recessive genetic disease. Which of the following pedigrees shows an impossible relationship? (

    asked on November 23, 2013
  17. English

    I have to read the book 'Nethergrave' by Gloria Skurzynski, but the online book doesn't seem to want to open on either of my computers so I assume the site is down. Does anyone know where I could find the book somewhere else online, I've been searching

    asked on December 31, 2015
  18. Algebra 2(help please!!)

    Alisha bought a collection of 500 old pennies. She chose 20 pennies from the collection and recorded their dates. Seven pennies had dates earlier than 1980. What percent of the pennies in Alisha’s collection have dates earlier than 1980? How would I

    asked on December 7, 2016
  19. alg 1

    It takes a florist 3 hour and 15 minutes to make 3 small centerpieces and 3 large centerpieces. It takes 6 hours and 20 minutes to make 4 small centerpieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large

    asked on January 30, 2012
  20. Geography

    What did the Han emperors do to keep the economy stable A. Stopped merchants from selling goods along the Silk Road B. Brought grain, stored it, and resold it during times of low harvest C.introduced the first standardized coins D. Refused to allow

    asked on November 8, 2018
  21. Chemistry

    The temperature rises from 25.00 °C to 29.00 °C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ÄErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C

    asked on December 6, 2012
  22. Urgent math

    The initial size of a culture of bacteria is 1000. After one hour the bacteria count is 4000. (a) Find a function n(t) = n0ert that models the population after t hours. n(t) = b)Find the population after 1.5 hours. (Round your answer to the nearest whole

    asked on August 3, 2015
  23. Math

    Which best describes best describes your ability to graph inequality

    asked on May 4, 2016
  24. chemistry

    what is the strongest intermolecular force in nitrogen trifluoride

    asked on March 20, 2015
  25. geometry

    Campsite F And G Are On Opposite Sides Of The Lake.A Survey Crew Made Measurements Shown On The Diagram .What Is The Distance Between The Two Campsites?

    asked on August 17, 2012
  26. Chemistry

    The complex ion, [Ni(NH3)6]2+, has a maximum absorption near 580 nm. Calculate the crystal field splitting energy (in kJ/mol) for this ion.

    asked on December 6, 2012
  27. calculus

    The area A = πr2 of a circular water ripple changes with the radius. At what rate does the area change with respect to the radius when r = 4ft?

    asked on April 13, 2015
  28. Honors English 11

    Can someone check my answer please? Q: Read and analyze "When I heard the learn'd Astronomer" by Walt Whitman. What romantic ideas does it express, and how does the structure of the poem reinforce the meaning? -When i heard the learn'd astronomer; When the

    asked on October 29, 2015
  29. Chemistry

    A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 338.mg of oxalic acid H2C2O4 , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The

    asked on November 7, 2018
  30. Chemistry

    Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq).HClO is a weak acid with a Ka of 4.0× 10–8. It reacts with strong base to produce ClO–. (e) after addition of 60.0 mL of KOH

    asked on April 25, 2013
  31. Geography

    What was the result of the development of the Silk Road

    asked on November 8, 2018
  32. Physics

    On an aircraft carrier, a jet can be catapulted from 0 to 155 mi/h in 2.00 s. If the average force exerted by the catapult is 5.53×106 N what is the mass of the jet?__________ kg

    asked on October 12, 2012
  33. Chem

    Separate the following balanced chemical equation into its total ionic equation. AgNO3​(aq)+NaCl(aq) --> NaNO3​(aq)+AgCl(s) (List the ions in order of the above equation.) Write the net ionic equation for the reaction above. (Make sure the cation is

    asked on October 16, 2017
  34. algebra

    does the data in the table represent a linear function? if so, wirte a rule for the function. (below is what the table looks like) x | -2| -1| 0 | 1| 2| y | -7| 1| 8 | 17| 25| answer choices yes; y = 8x +9 yes; y = 8x + 8 no yes; y = 1/8x + 8

    asked on June 5, 2014
  35. Trigonometry

    Given that sin^2x = 4/13, what is the cos^2x? I am so lost. I need to show my work. Please help. THANK YOU!

    asked on August 30, 2017
  36. physics- please help

    Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm . What was the magnitude of the average force applied by the ball on the glove? question #2 How much tension must a

    asked on April 29, 2012
  37. Chemistry

    Thyroxine, an important hormone that controls the rate of metabolism in the body can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.144°C. Pure

    asked on January 21, 2013
  38. Chemistry

    How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.

    asked on December 6, 2012
  39. Psychology

    9.By means of introspection, Dr. Marsh attempts to determine the components of things like perception, thinking, and consciousness. By contrast, Dr. Smyth wants to understand what the mind does in producing different kinds of behavior. We can reasonably

    asked on May 4, 2016
  40. Chemistry

    Which of the following is NOT true for ΔGrxn? A.) If ΔG°rxn > 0, the reaction is spontaneous in the forward direction. B.) If Q = 1, then ΔGrxn = ΔG°rxn.If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction. C.) If ΔG°rxn > 0, the

    asked on November 16, 2014
  41. Geometry

    Three interior angles of a convex heptagon measure 125 degrees, and two of the interior angles measure 143 degrees. Which are possible measures for the other two interior angles of the heptagon? 1: 48 and 48 degrees 2: 39 and 100 degrees 3: 100 and 116

    asked on January 7, 2016
  42. physics help plz

    One 3.5 kg paint bucket is hanging by a massless cord from another 3.5kg paint bucket, also hanging by a massless cord, as shown in the figure . Part a) If the buckets are at rest, what is the tension in lower and higher cord ? Part b)If the two buckets

    asked on May 6, 2012
  43. MATH

    f 210 people said football was their favorite sport to watch, how many people were surveyed? Football is labeled on the circle graph as 42%.

    asked on January 25, 2019
  44. calculus

    A firework is launched at the rate of 10 feet per second from a point on the ground 50 feet from an observer. To 2 decimal places in radians per second, find the rate of change of the angle of elevation when the firework is 40 feet above the ground. Type

    asked on April 20, 2015
  45. Math

    What is the combined height of 3 nickels, 2 nickles, and 1 nickle

    asked on February 25, 2015
  46. Math

    1. Simplify. 3x^2+ 5x-5x^2-4x+5-2 A.-8x^2-9x+3 B.2x^2+x+3 C.-2x^2-9x+3*** D.-2x^2+x+3 2. Add or Subtract.(8x – 2y) + (3x – 4y) A.11x+8y B.4x-y C.11x-6y*** D.5x+2y 3.(5x^2-4x-1)-(-4x^2-4) A.-9x^2-8x-1 B.9x^2-4x+3*** C.x^2-4x-3 D.9x^2+4x-3 4.The distance

    asked on May 5, 2016
  47. chemistry

    Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 3.45 g of hexane is mixed with 16.3 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be

    asked on December 6, 2011
  48. College Physics

    A 22.9-kg child is on a swing attached to ropes that are L = 1.33 m long. Take the zero of the gravitational potential energy to be at the position of the child when the ropes are horizontal. Part A)The child's gravitational potential energy when the child

    asked on February 20, 2011
  49. unscrambling word

    Can you help me unscramble these words please! radmordey conshorier trinabac mecal minglem bobing lukarak its in spanish- srecmoro, and tsmnoamo- help please england antelope is the answer tyler! lafrpty=flytrap lafrpty=flytrap please help me to unscramble

    asked on June 14, 2005
  50. math

    you invest $4000 in an account that pays simple interest of 6% for 30 years. calculate the amount of money you'll have at the end of the indicated time period.

    asked on May 16, 2013
  51. Pre-Algebra A

    A company reports $23,765 in income and $18,945 in expenses for February. What was the amount of profit or loss for the month? A. $4,820 profit B. $4,820 loss C. $5,220 profit

    asked on February 13, 2019

    3. What is the rhyme scheme of the following Anne Bradstreet poem? To Her Father with Some Verses Most truly honored, and as truly dear, If worth in me or ought I do appear, Who can of right better demand the same Than may your worthy self from whom it

    asked on September 4, 2012
  53. physics

    A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 15.0 m/s at a 33.0 degreCalculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 1.90 m above the ground.e angle to the horizontal.

    asked on October 12, 2011
  54. Math-Probability

    A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

    asked on March 16, 2012
  55. physics

    question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?

    asked on April 29, 2012

    I am so lost and confused right now with this question. I might have a quiz. Help me understand before this pop quiz!!!! THANKYOU A diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the water. a) how long before the

    asked on February 3, 2016
  57. environment

    Oil spills and leaks in the Pacific Ocean have harmed marine organisms and the environment. Which kind of environmental issue is illustrated by this example?

    asked on May 7, 2014
  58. English

    Which of these does William Wordsworth celebrate in "I Wandered Lonely as a Cloud" nature aloneness the death of reason human companionship I think either A or B, but I can't decide which.

    asked on February 19, 2018
  59. Social studies

    Which factors influenced the growth of Christianity in East Africa select all that apply A mansa munsa's pilgrimage to Mecca B trade with Greeks and Romans C influence of a captured Syrian servent D invasion of mail's Christian military E caravans of

    asked on March 11, 2019

    a constant force of 6.00N acts on a 3.00kg object for 10.0s. what are the changes in the objects momentum and velocity?

    asked on August 6, 2014
  61. history

    what was the napoleonic code?

    asked on October 18, 2010
  62. History

    Hai! Anyone Please Check This Answer Please! Which of the following is the most likely reason why many Mexicans were opposed to American investment in their country? A. American leaders overthrew the successful government of Porfirio Díaz.* B. Many

    asked on March 1, 2017
  63. Algebra 2(help please!!)

    1. Tony decides to use observation. He visits 10 students and observes them doing schoolwork at home for 30 min. If a student looks at social media during that time, he notes it. (a) Provide an advantage of using observation. (b) Provide a disadvantage of

    asked on December 7, 2016
  64. Chemistry

    Two fixed charges, -4μC and -5μC, are separated by a certain distance. If the charges are separated by 20cm, what is the magnitude of the electric field halfway between the charges? My textbook says that the formula for electric field is (kq)/r^2. But

    asked on February 9, 2016
  65. Chemistry

    combustion analysis of 63.8 mg of C,H, and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?

    asked on December 6, 2012
  66. calculus

    The height of a cylinder with a fixed radius of 4 cm is increasing at the rate of 2 cm/min. Find the rate of change of the volume of the cylinder (with respect to time) when the height is 14cm.

    asked on April 13, 2015
  67. science

    The radius of the Earth is approximately 3,960 miles. Find the approximate surface-area-to-volume ratio of the Earth. A. 0.00025 B. 0.00076 C. 1,320 D. 11,880

    asked on July 10, 2013
  68. physics- please help !

    A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley

    asked on May 6, 2012
  69. math

    The time is 6:10 Is the hour hand closer to the 6 or 7 and why?

    asked on February 28, 2012
  70. maths

    how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of symmetry is x = -b/(2a) e.g. for

    asked on May 25, 2007
  71. Chemistry

    The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?

    asked on December 6, 2012
  72. History

    1.Which answer best describes a reason why industries flourished in New England? A- The people in New England had more work experience. B- New England had more lakes to use for water in factories. C- The soil was better than in the South so they could grow

    asked on April 28, 2015
  73. Science help!!!

    Describe the evidence that supported the hypothesis of Continental Drift.

    asked on November 12, 2013
  74. math

    Assume you want to accumulate $125,000 for a long-range goal in 40 years. You have two choices. Plan A is an account with annual compounding and an APR of 5%. Plan B is an account with continuous compounding and an APR of 4.5%. How much of an investment

    asked on May 14, 2013
  75. history

    How did Jeffersonian Democracy hope to remove obstacles to upward social mobility? How is it different from Jacksonian Democracy? Jeffersonian Democracy: http://en.wikipedia.org/wiki/Jeffersonian_democracy and

    asked on October 7, 2006
  76. Chemistry

    Suppose 0.780 of potassium iodide is dissolved in 150. mL of a 51.0mM aqueous solution of silver nitrate. Calculate the final molarity of iodide anion in the solution. You can assume the volume of the solution doesn't change when the potassium iodide is

    asked on November 7, 2018
  77. Science

    1.Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the frequency of radiation of wavelength 970 nm? Answer in units of s−1 . 2.Microwaves, such as those used for radar and to heat food in a microwave oven, have wavelengths

    asked on February 12, 2015
  78. Biology

    I have to write an essay with knowledge about the following: the biochemical structure of DNA, how DNA replicates, how the DNA structure forms the genetic code, and how that genetic code comes to be expressed as a phenotype. If I could get some help or a

    asked on October 31, 2018
  79. algebra

    All the members of a construction crew work at the same pace. Four of them working together are able to pour concrete foundations in 32 hours. How many hours would this job take if the number of workers: increased 2 times

    asked on January 28, 2017
  80. Chemistry

    Calculate the molar enthalpy for the following reaction. HCl(aq) + NH3 (aq) --> NH4Cl (aq). HCl = 50 ml (2.00M) NH3 = 50 ml (2.05 M) Delta T = 9.28 degrees Celsius. Ccal = 28.9J/g degrees celcius.

    asked on November 12, 2012
  81. MATH

    One light flashes every 2 minutes and another light flashes every 3.5 minutes. Suppose both lights flash together at noon. What is the first time after 1 PM that both lights will flash together ?

    asked on June 26, 2012
  82. business management

    A lecturer told his students " The purpose of a management course is to teach students about management, not to teach them to be managers. Do you agree or disagree with this statement? Discuss.

    asked on April 20, 2017

    two masses m1=400.g and m2 =600.g are connected with a light string which goes over a frictionless pulley of negligible mass. the two systems are released from rest. a) what is the acceleration of each mass? b) what is the tension force in the string? and

    asked on July 21, 2014
  84. math

    Gabriel walked 100m around the perimeter playground.How long and how wide could the play ground be? give three different answers.

    asked on April 19, 2015
  85. Math

    1 1/4 teaspoons baking powder per 3/8 cup flour, what is the unit rate

    asked on September 18, 2017
  86. Astronomy

    If you lived on Mars, which of the planets would exhibit retrograde motion? Explain.

    asked on June 3, 2015
  87. physics

    A large boulder is ejected vertically upward from a volcano with an initial speed of 39.0m/s . Air resistance may be ignored. (a) At what time after being ejected is the boulder moving at a speed 19.0m/s upward? (b) At what time is it moving at a speed

    asked on September 29, 2013
  88. Psychology

    Dr. Jones is interested in how human behavior may be genetically inherited from remote ancestors, such as chimpanzees. Her field of interest is A. chemical psychobiology. B. evolutionary psychology. C. clinical neuropsychology. D. behavioral genetics. I

    asked on May 4, 2016
  89. Alg 1

    You have 60 megabytes of space left on your portaable media player. You can choose to download song files that use 3.5 megabytes or video files that use 8 megabytes. You want to download at least 12 files. What is a graph showing the numbers of songs and

    asked on January 30, 2012
  90. Algebra

    Simplify the rational expression. State any restrictions on the variable. t^2+4t-12/t^2-4

    asked on March 7, 2019
  91. precal

    If p(t) is the profit I expect my business to earn t years after opening, use functional notation to express my expected profit after 4 years and 4 months. (Round your answer to two decimal places.)

    asked on August 31, 2018
  92. algebra

    Match the inequality to its graph. A. less than or equal to -1 B. less than 3 C. less than 1 D. less than or equal to -3 7. 4y + 3 *less than or equal to* y+6 8. -2y > 2 9. y over 3 < -1 10. 3y *less than or equal to* 2y +

    asked on September 30, 2016
  93. History

    1. How did new England's textile industry affect both children and women? a) It allowed them to earn a living wage until the age of 25. b) It gave them opportunities not available on family farms. c) It permitted them to complete their schooling. d) It

    asked on March 24, 2015
  94. physics

    Cliff divers at Acapulco jump into the sea from a cliff 37.1 m high. At the level of the sea, a rock sticks out a horizontal distance of13.39 m. The acceleration of gravity is 9.8 m/s^2. With what minimum horizontal velocity must the cliff divers leave

    asked on February 19, 2013
  95. Mathematics.

    A college football coach wants to know if there is a correlation between his players’ leg strength and the time it takes for them to sprint 40 yards. He sets up the following test and records the data: Every day for a week, he counts how many times each

    asked on December 10, 2018
  96. chemistry

    Choose the bidentate ligand from the substances below. A) cyanide ion B) ammonia C) EDTA D) carbon monoxide E) ethylenediamine

    asked on December 6, 2012
  97. History

    How were William Lloyd Garrison and the Rev. Elijah Lovejoy alike? Both lived in Boston and were Underground Railroad conductors. Both printed newspapers with antislavery messages in the North. Both used their houses as Underground Railroad stations and

    asked on April 20, 2015
  98. Algebra

    Write a recursive formula for the sequence 5, 18, 31, 44, 57, ... Then find the next term. I’m thinking that the answer is A. A. a1=-8; an=an-1+13. The next term is 70 B. a1=5; an=an-1+13. The next term is 70 C. a1=5; an=an-1-13. The next term is 83 D.

    asked on March 8, 2019
  99. Algebra

    Which is an equivalent form of the expression 1800(1.2)–t? Is 1800(1/2)^t correct?

    asked on June 28, 2014
  100. HBC AND NWC

    how did the old Hudson bay company keep control over the new hudson bay company after the merger with the northwest company? I read over the paragraph several times, and I still cant find the answer to this question. It says something...the Legislation

    asked on May 22, 2011


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