Most popular questions and responses by brianna
  1. Physics

    An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.9 m/s in 3.70 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same,

    asked on September 2, 2013
  2. Consumer Math

    Your parents are buying a house for $187,500. They have a good credit rating, are making a 20% down payment, and expect to pay $1,575/month. The interest rate for the motrgage is 4.65%. What must their realized income be before each month and how much

    asked on February 28, 2013
  3. Physics based Calculus

    Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that

    asked on September 27, 2012
  4. Chemistry

    Sort these species into isoelectronic groups. It doesn't matter which group goes in which box, so long as the correct species are grouped. Ne Mg2+ S2- Ti4+ K+ He Li+ Be2+ N3-

    asked on November 6, 2014
  5. Physics

    What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium vapor devices?

    asked on April 11, 2016
  6. chemistry/physics

    If a rock climber accidentally drops a 69.0 g piton from a height of 305 meters, what would its speed be just before striking the ground? Ignore the effects of air resistance.

    asked on February 6, 2013
  7. science

    A car travels 240km in 2hr. And the sprinter travels 100m in 9.5 seconds. which one is traveling faster and by how much ?

    asked on August 29, 2011
  8. Language Arts

    15. Read the following lines from the story “Forbidden Fruit.” Of course, in childhood there were occasions when I could have tasted pork in kindergarten or ate at the home of a friend, but I never broke the commandment. When we had rice and pork in

    asked on December 6, 2016
  9. Chemistry

    Calculate the volume of 1.0 M CuSO4 stock solution you should use to make 100 mL of a 0.010 m CuSO4 solution.

    asked on September 1, 2016
  10. English

    Which of the following quotes spoken by Juliet shows the strongest example of how she changes over the course of Romeo and Juliet? A. Madam I am here what is your will B. I'll look to like if looking liking move: but no more deep will I endart mine eye

    asked on April 5, 2016
  11. Physics

    A child is pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m?

    asked on September 14, 2010
  12. math

    Which is M=300J/P solved for J? A. J=300PM B. J=300M/P C. J=300PM D. J=PM/300

    asked on April 29, 2014
  13. science

    Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride.After dissolving this mixture in water,0.500M silver nitrate is added dropwise until precipitate formation is complete. THe mass of the white precipitate formed is 0.641 g. a)Calculate

    asked on January 2, 2008
  14. Math

    Marge bought a computer for $699 on the installment plan. The terms of the plan were a down payment of $100, then payments of $58 a month for 12 months. How much was her total cost?

    asked on June 15, 2016
  15. Chemistry

    For the following electrochemical cell, Co(s)/Co2(aq,.0155M)// Ag+(aq,2.50M)/Ag(s) 1.Write the net cell equation. 2.Calculate the following values at 25 degrees celcius. Eocell, Ecell, deltaGo rxn, and delta Grxn

    asked on July 25, 2013
  16. A.P Chemistry

    Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X 64.8% ? Y 73.0% 104. Z

    asked on October 23, 2006
  17. algebra

    Across a horizontal distance of 25 feet, a roller coaster has a steep drop. The height of the roller coaster at the bottom of the drop is -125 feet, compared to its height at the top of the drop. What is the average amount that the roller coaster's height

    asked on October 8, 2018
  18. Language Arts

    Read the following passage. Then answer the questions that follow. THE OLYMPIC SWIMMER Who will be the winner bold? Athletes from both far and near Train and Strain to be the best. But who will win the medal gold? Swimmers swivel, splash, and kick Back and

    asked on December 5, 2016
  19. Physics

    I need help solving this please! I think that for part (b) I can use energy and wavelength to solve for frequency and the one with the highest frequency is the most damaging, but I'm not sure what to do for part (a). You want to study a biological specimen

    asked on August 15, 2010
  20. Physics

    You design an engine that takes in 1.5 x 10^4 J of heat at 650 K in each cycle and rejects heat at a temperature of 350 K. The engine completes 240 cycles in 1 minute. What is the theoretical maximum power output of your engine? can you please also show

    asked on July 18, 2010
  21. Math

    1. Find the 11th term of the geometric sequence 64, -32, 16, -8, … . 2. Find the 1st term of a geometric sequence with a 10th term -1024 and r = -2. 3. Find the sum of each infinite geometric series, if possible. a. 10 + 2 + 2/5 + ..... b. 1.2 – 2.4 +

    asked on October 7, 2014
  22. science

    A drinking glass at a crime scene contains a clear colorless liquid that may be water or alcohol. As the investigator, you know that the densities of alcohol, water, and ice are 0.79g/mL, and 0.92/mL. Design a simple method to determine the identity of the

    asked on September 16, 2014
  23. Chemistry-Urgent

    The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 ✕ 10-4 atm. What is the solubility of CO2 in the open drink? Express your

    asked on February 19, 2017
  24. physics

    It takes a runner 3 h, 32 min, 26 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?

    asked on August 31, 2017
  25. Spanish

    Un amigo te pregunta quiénes están haciendo varios trabajos. Responde sus preguntas con frases completas. 1. ¿Quién saca fotos? 2. ¿Quién apaga el incendio? 3. ¿Quién investiga el crimen? 4. ¿Quién sirve comida en el restaurante? 5. ¿Quién te

    asked on February 27, 2013
  26. Chemistry

    A hot air balloon is filled with 1.31 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 129 °C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.

    asked on October 14, 2014
  27. Algebra

    A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to

    asked on October 13, 2011
  28. Texas History

    How is urbanization related to popular culture as seen in Texas in the 1920s?

    asked on February 2, 2018
  29. Chemistry

    A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

    asked on July 24, 2013
  30. Chemistry

    Separate this redox reaction into its component half-reactions. O2 + 2Mg----> 2MgO

    asked on July 24, 2013
  31. Math

    Charlie wants to buy a $500 TV in 9 months. How much should he invest now at 8% simple interest to have the money in 9 months?

    asked on April 30, 2014
  32. Physics question help/ check my answers

    The middle two question please check my answers and tell me if I am correct or if there is something I am missing. The first and the last question I need help to understand and complete it. Thank you in advance!!! 1. What is the electric force between a +2

    asked on May 8, 2014
  33. Calculus

    If C(x) = 18000 + 400x − 2.2x^2 + 0.004x^3 is the cost function and p(x) = 2800 − 7x is the demand function, find the production level that will maximize profit. (Hint: If the profit is maximized, then the marginal revenue equals the marginal cost.)

    asked on October 21, 2013
  34. A.P Chemistry

    A rigid 5.00 L cylinder contains 24.5g of N2(g) and 28.0g of O2(g). (a). Calculate the total pressure, in atm, of the gas mixture in the cylinder at 298 K (b) The temperature of the gas mixture in the cylinder is decreased to 280 K. Calculate each of the

    asked on October 22, 2006
  35. Physics: Sound Waves

    Two organ pipes, open at one end but closed at the other, are each. 1.14 m long. One is now lengthened by 2.00 cm. Find the frequency of the beat they produce when playing together in their fundamental.

    asked on July 16, 2010
  36. English

    Which responses accurately state a central idea of The Tempest? (Select all that apply.) The Tempest The power of magic can be a force for good, but it is also complicated and too great a responsibility for any single person. Some people in life will

    asked on October 19, 2018
  37. Chem 2

    At 25 °C only 0.0570 mol of the generic salt AB is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C?

    asked on July 18, 2013
  38. Geometry

    A model is made of a car. The car is 9 feet long and the model is 6 inches long. What is the ratio of the length of the car to the length of the model?

    asked on March 17, 2016
  39. physics

    A truck travels up a hill with a 7.2◦ incline. The truck has a constant speed of 19 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s.

    asked on September 18, 2010
  40. Calculus

    If C(x) = 18000 + 400x − 2.2x^2 + 0.004x^3 is the cost function and p(x) = 2800 − 7x is the demand function, find the production level that will maximize profit. (Hint: If the profit is maximized, then the marginal revenue equals the marginal cost.)

    asked on October 21, 2013
  41. Math

    a cell phone company offers the following plan: monthly charge (which includes 500 minutes) for $40 and a charge for additional minutes will be 5 cents a minute. write a piecewise function function putting x&y terms that can be used in any # or minutes. I

    asked on October 17, 2015
  42. chemistry

    3CuCl2-2H2O + 2AL--> 3Cu +2AlCl3+6H2O what is the thepretical yield or copper? then what is the limiting reagent and excess reagent? whats the percentage yield?

    asked on November 25, 2010
  43. physics HELP

    A sailboat starts from rest and accelerates at a rate of 0.18 m/s2 over a distance of 494 m. (a) Find the magnitude of the boat's final velocity. (b) Find the time it takes the boat to travel this distance.

    asked on September 19, 2017
  44. chem

    A weather balloon is filled with helium that occupies a volume of 4.33 104 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the temperature is -10.2°C. What is the volume of the balloon at that

    asked on March 23, 2017
  45. English

    Canto VIII of the epic poem Beowulf is structured as a dialogue between Unferth and Beowulf. Which responses accurately describe the impact Canto VIII has on the overall meaning of the epic poem? (Select all that apply.) Beowulf A. The boastful dialogue

    asked on October 15, 2018
  46. math

    Jose invests 3250 dollars at 6% interest compounded annually. What will be the balance in the account after 3.5 years? A. 3932.50 dollars B. 3985.23 dollars C. 4752 dollars D. 5200 dollars

    asked on May 1, 2014
  47. Kimpton

    what is a repetitious, overwritten sentence called

    asked on January 19, 2009
  48. Math

    A room measures 450cm by 350cm. Find the side if the largest square tile that can be used to tile without cutting

    asked on November 20, 2014
  49. History

    What did Otto Von Bismarck do to help unify Germany? He sponsored the development of a nationalistic education focusing on the achievements of the German people. He helped create wars with neighboring countries to increase national pride among the German

    asked on October 18, 2018
  50. Algebra

    Simplify (6x^-2)^2(0.5x)^4. I have no idea how to do this!, please help!

    asked on February 9, 2016
  51. History

    According to King, how did the Vietnam War affect U.S. policy at home?

    asked on April 20, 2013
  52. world history

    Which of the following is true of the Antarctic Treaty System? A. It bans commercial mining in Antarctica. B. It's actually the Society for the Geographic Exploration of Antarctica. C. It was established specifically to enforce ecological regulations. D.

    asked on November 19, 2013
  53. science

    I can travel where there are no molecules, but never through a brick. I can travel through space, but never around a corner. What am I?

    asked on September 26, 2007
  54. AP Physics

    Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The hanging block has a mass of 16 kg and the one on the plane has a mass of 8

    asked on October 15, 2015
  55. College Physics

    A child swings a yo-yo of weight mg in a horizontal circle so that the cord makes an angle of 30 degrees with the vertical. Find the centripetal acceleration.

    asked on November 10, 2010
  56. Science

    what are the component parts of modern fireworks? what does each part do?

    asked on September 18, 2014
  57. physics

    The current in a lightning bolt is 1.6 105 A. How many coulombs of charge pass through a cross-sectional area of the lightning bolt in 0.70 s? I don't know how to set this up???

    asked on May 16, 2012
  58. English

    Which responses explain how affixes change the world guise to another part of speech? (Select all that apply.) A. Adding the prefix dis- and the suffix -ly creates the adverb disguisedly. B. Adding the prefix dis- and the suffix -ment creates the adjective

    asked on October 15, 2018
  59. ECON

    If you save $250 each year for the next 20 years, how much money would you have if you earned 9%?

    asked on March 8, 2014
  60. physics

    It is estimated that in the United States (population 250 million) there is one electric clock per person, with each clock using energy at a rate of 3.5 W. Using this estimate, how much energy is consumed by all the electric clocks in the United States in

    asked on May 16, 2012
  61. American Government

    Has anyone done the Memo to the president portfolio? I am like...really stuck on it.

    asked on December 1, 2016
  62. math

    a rope is cut into three pieces P,Q and R.the lengths of the pieces are in the ratio 3:5:7.if the is 33 feet and 9 inches long,find the lengths of P,Q, and R

    asked on December 11, 2013
  63. chem

    The pressure in an automobile tire is 1.89 atm at 24.0°C. What will be the pressure if the temperature increases to 38.0°C? i alreaddy got 1.89/24.0. i dont know where to go from there

    asked on March 21, 2017
  64. math

    Laura drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 6 hours. When Laura drove home, there was no traffic and the trip only took 4 hours. If her average rate was 22 miles per hour faster on the trip home,

    asked on September 23, 2015
  65. science

    The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized?

    asked on September 7, 2010
  66. math

    Rihanna planned a rectangular courtyard for a park and made a scale drawing using inches as the unit of measurement. She originally planned for the length of the actual courtyard to be 54 feet, but she decided to change it to 72 feet. If the length of the

    asked on September 7, 2016
  67. Algebra

    The variable Z is directly proportional to X. When X is 6, Z has the value 72. What is the value of Z when X = 13

    asked on July 24, 2016
  68. Pre algebra

    what is another way to write to 72 - (-25) A. 72+25 B. -72 -25 C. 72 - 25 D. - 72 - (-25) what is the value of - 27 - 8 A. - 35 B.-19 C. 19 D. 35

    asked on August 21, 2019
  69. ASAP Physics

    A small first-aid kit is dropped by a rock climber who is descending steadily at 1.6 m/s. (a) After 3.5 s, what is the velocity of the first-aid kit? (b) After the 3.5 s, how far is the kit below the climber?

    asked on September 27, 2017
  70. Physics

    If ^235U (235.043930 u) is struck by a neutron it undergoes fission producing ^144 Ba (143.922953 u), ^89 Kr (88.917630 u) and three neutrons (1.0086649 u). (a) Calculate the energy in MeV released by each fission reaction. (b) Calculate the energy

    asked on August 18, 2010
  71. Math

    In what proportion should you combine 2:5 soaking solution and distilled water to create 1:20 solution?

    asked on March 25, 2017
  72. Chemistry

    What is the limiting reagent when 10.8 g water reacts with 4.7 g Na to produce NaOH and H2?

    asked on January 29, 2013
  73. Business 101

    Carmen Santiago works for a number of businesses as a “consultant.” She has helped design accounting systems, provided accounting services, and analyzed the financial strength of her clients’ businesses. Carmen is working as a A.public accountant

    asked on February 6, 2012
  74. Algebra

    The sum of two consecutive even integers is 118. A. Define a variable for the smaller integer. B. What must you add to an even integer to get the next greater even integer? C. Write an expression for the second integer. D. Write and solve an equation to

    asked on October 13, 2011
  75. Chemistry

    Determine the number of grams of oxygen in 13 grams of calcium acetate.

    asked on October 19, 2014
  76. Algebra

    Ramiro earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week Ramiro earned a total of $650. He worked 5 times as many hours during the week as he did on the weekend. Write and solve a system of equations to determine

    asked on December 10, 2013
  77. physics

    A parachutist with a camera, both descending at a speed of 14 m/s, releases the camera at an altitude of 31.7 m. What is the magitude of the velocity of the camera just before it hits the ground? The acceleration of gravity is 9.8 m/s 2 and air friction is

    asked on September 12, 2013
  78. Spanish

    Un amigo te pregunta quiénes están haciendo varios trabajos. Responde sus preguntas con frases completas. 1. ¿Quién saca fotos? 2. ¿Quién apaga el incendio? 3. ¿Quién investiga el crimen? 4. ¿Quién sirve comida en el restaurante? 5. ¿Quién te

    asked on February 27, 2013
  79. physics

    A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 . electrons I got 9.3e+22 for B but its wrong

    asked on May 16, 2012
  80. help physics

    It takes a runner 3 h, 32 min, 26 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?

    asked on August 31, 2017
  81. History

    Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who

    asked on May 5, 2014
  82. language arts

    complete the analogies by selecting a pair of words whose relationship most resembles the relationship of the pair in capitol letters. BRUSQUE:BRUSQUENESS:: a. simulated:simulation b. foolish:inanity c. angry:tirade **i think its "a" but im not sure

    asked on January 5, 2012
  83. english

    Which one of the following sentences correctly uses a comparative adjective? A. Of the three girls, Janet is the better speaker. B. Alicia is a gooder swimmer than Marilynn. C. George has a bigger appetite than Harry. D. This is the worse picture I've ever

    asked on August 19, 2014
  84. chemistry

    A certain rifle bullet has a mass of 6.45 g. Calculate the de Broglie wavelength of the bullet traveling at 1817 miles per hour.

    asked on November 1, 2013
  85. Chemistry

    What is the [H3O] concentration in a 1.0M CH3COONa solution? (The Ka for CH3COONa is 2.0*10-5.)

    asked on February 24, 2012
  86. Math

    What are the proceeds for a discounted loan for $300 repaid in 8 months at 17%?

    asked on April 30, 2014
  87. chemistry

    A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/°C. The observed increase in temperature is 21.1 °C at a constant

    asked on October 27, 2013
  88. AP World History

    What reasons might there be for the timing, rapidity, and direction of Muslim territorial expansion? Ughhh, I searched the chapter in the textbook, the chapter outline on the packet and google and I'm getting so stressed out, someone please help me?

    asked on January 26, 2012
  89. Algebra

    Using each of the following scales, find the dimensions in a blueprint of an 8ft-by-12ft room. 1. 1 in.:2ft 2. 1 in.:4ft

    asked on October 13, 2011
  90. A.P Chemistry

    A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm,

    asked on October 23, 2006
  91. 3rd grade math

    what is standard form ? and What is expanded form ?

    asked on August 16, 2011
  92. physics

    In ammonia (NH3) molecule, the three hydrogen atoms form an equilateral triangle, the distance between the centers of the atoms being 16.28x10^-11 m, so that the center of the triangle is 9.40x10^-11 m from each hydrogen atom. The nitrogen atom is at the

    asked on October 10, 2011
  93. Chemistry Stoichiometry

    Sulfuric acid can dissolve aluminum metal according to the following reaction. Suppose you wanted to dissolve an aluminum block with a mass of 25.7 . How many grams of H2 gas would be produced by the complete reaction of the aluminum block?

    asked on October 27, 2012
  94. geography

    cultural exchange between nations has been as a result of technological advances

    asked on December 20, 2011
  95. chemistry

    The molar mass of magnesium carbonate, MgCO3, is 84 g/mole. How many moles are in 12.60 g of magnesium carbonate?

    asked on December 5, 2009
  96. algebra

    mary wants to put square tiles on the kitchen floor. The tile she has selected is 12 inches on each side and comes in boxs of20 tiles for $54 per box. Her kitchen is 15 feet 8 inches log and 5 feet 9 inches wide. How many boxes of tile will she need and

    asked on September 2, 2014
  97. Calculus 1

    Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y=8-x^2, y= x^2 ; about x=2 V=?

    asked on November 24, 2013
  98. physics

    A car starts from rest and travels for 4.1 s with a uniform acceleration of +1.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.8 m/s2. The breaks are applied for 1.80 s.

    asked on September 19, 2017
  99. Chemistry

    The equilibrium constant for the reaction of the weak base aniline is Kb = 4.3e-10. C6H5NH2 (aq) + H2O (l) --> C6H5NH3+ (aq) + OH- (aq). Calculate ΔG at 298 K when [C6H5NH2] = 0.250 M, [C6H5NH3+] = 1.0E-5 M, [OH-] = 0.000480 M i used the equations dG=dG^o

    asked on March 25, 2014
  100. Calculus 1

    Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y=8-x^2, y= x^2 ; about x=2 V=?

    asked on November 24, 2013


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