Most popular questions and responses by Brittney
  1. Math. Pls. Help!

    What factors should you consider when determining the best graph or display to represent a given set of data? In your answer, choose a set of data relevant to your life and explain the best way to display it.

    asked on March 9, 2016
  2. chemistry

    Exactly 10mL of water at 25 degrees C was added to a hot iron skillet. all of the water was converted into steam at 100 degrees C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 L/mol*C, what was the temp change of the

    asked on October 26, 2010
  3. English 3

    "When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of

    asked on November 3, 2014
  4. science

    If the magnitude of the electric field in air exceeds roughly 3 X10^6 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 52 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks

    asked on February 11, 2012
  5. chemistry

    calculate the hydronium ion concentration in an aqueous solution that contains 2.50x10^-6M in hydroxide solution

    asked on December 1, 2011
  6. chemistry

    A 0.97 m aqueous solution of an ionic compound with the formula MX has a freezing point of -2.5 ∘C .

    asked on January 30, 2015
  7. Algebra 2B

    Come up with a new linear function that has a slope that falls in the range −< < 1 0 m . Choose two different initial values. For this new linear function, what happens to the function’s values after many iterations? Are the function’s values getting

    asked on October 1, 2016
  8. Chemistry

    A 110.-g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water in the container, assuming

    asked on July 11, 2011
  9. Chemistry

    A string has a length of 84 cm. The string is stretched taut, and both ends are restricted to be nonmoving. Touching the string at which of the following points will not produce a standing wave when the string is plucked?

    asked on February 15, 2012
  10. Physics

    A child in a boat throws a 5.40 kg package out horizontally with a speed of 10.0 m/s, Fig. 7-31. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 40.0 kg.

    asked on April 14, 2011
  11. Chemistry

    If your body develops a charge of -17 (microcoulombs), how many excess electrons has it acquired, and what is their collective mass?

    asked on September 8, 2012
  12. trigonometry

    A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will

    asked on January 8, 2012
  13. Physics

    Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic

    asked on April 17, 2011
  14. Chemistry

    Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) → C2H5OH(l) What is the maximum amount, in kg, of ethanol that can be produced when 1.65 kg of ethylene (C2H4) and 0.0610 kg

    asked on October 6, 2013
  15. math

    Kittens weigh about 100 grams when born and gain 7 to 15 grams per day. If a kitten weighed 100 grams at birth and gained 8 grams per day, in how many days will the kitten triple its weight?

    asked on October 23, 2013
  16. Chemistry

    Balance the following equation for a basic solution. MnO4-+C2O4-2= Mno2 + CO3-2

    asked on October 27, 2013
  17. chemistry

    When cane sugar reacts with oxygen in living systems, carbon dioxide and water are produced. What weight of carbon dioxide can be produced from the reaction of 15.0 grams of cane sugar with 15.0 grams of oxygen? (Hint: balance the equation) ___C12H22O11(s)

    asked on October 9, 2013
  18. basics and tools of floral design

    The fabric label doesn’t say if the linen was preshrunk. You test the fabric for shrinkage and determine it needs to be shrunk. How do you do this? A. Wash the material in cold water and dry on high in dryer. B. Immerse the material in hot water and drip

    asked on December 13, 2011
  19. College Algebra

    The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years.

    asked on November 17, 2010
  20. Physics

    A child sitting 1.80 m from the center of a merry-go-round moves with a speed of 1.45 m/s . Calculate the centripetal acceleration of the child.Calculate the net horizontal force exerted on the child. (mass = 28.5 kg )

    asked on April 19, 2016
  21. Physics

    A car traveling at 20 m/s applies the brakes. The coefficients of static and kinetic friction between the tires and the road are 0.80 and 0.50 respectively. (A) Determine the stopping distance if the car is able to stop as quickly as possible without

    asked on October 25, 2012
  22. reading and writing

    In which sentence does the italicized word have a negative connotation? A. Although she had worked hard in high school, Ruth found the college courses challenging. B. Jenna's green eyes and dark eyelashes gave her an exotic look. C. Jack, who is the most

    asked on March 22, 2015
  23. chemistry

    Benzene has the empirical formula CH and an experimental molar mass of 78 g/mol. What is its molecular formula? Explain how you got your answer.

    asked on April 19, 2012
  24. chemistry

    During a strenuous workout, a student generates 2000 kJ of heat energy. What mass of water would have to evaporate from the student's skin to dissipate this much heat?

    asked on October 26, 2010
  25. calculus 2

    Six and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch.

    asked on May 31, 2011
  26. Chemistry

    In a coffee-cup calorimeter, 1.70 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.71°C. Assuming the solution has a heat capacity of

    asked on July 11, 2011
  27. mathematics concepts

    Fraction symbols can usually be safely introduced A. at the beginning of third grade. B. near the end of first grade. C. near the end of third grade. D. at the beginning of second grade. my answer is c.

    asked on February 21, 2015
  28. Liberal Arts

    Part 1: You finally made it…graduation day has arrived! Your parents are so proud that they are throwing you a HUGE party. They have rented a big tent for your graduation party just in case it rains. The inside of the tent (represented by the blue area)

    asked on January 14, 2012
  29. medical coding

    this 32-year old female was burned by hot grease in her kitchen 1 week ago. She is seen in the hospital-based wound clinic for large dressing changes on both upper extremities following second-degree burns to both arms. This is accomplished without

    asked on August 14, 2014
  30. Math

    A motorist traveling 55 mph is being pursued by a highway patrol car traveling 65 mph. If the patrol car is four miles behind the motorist, how long will it take the patrol car to overtake the motorist?

    asked on November 5, 2013
  31. physics

    A charge of 2.1 nC and a charge of 4.7 nC are separated by 57.90 cm. Find the equilibrium position for a -4.7 nC charge. ____ cm from the 2.1 nC charge. what is the answer? and how did you get it? thaanks

    asked on April 11, 2012
  32. chemistry

    the human body obtains 2000 kj from a candy bar. if this energy were used to vaporize was at 100 degrees celcius, how much water in liters could be vaporized? ??(assume that the density of water is 1.0g/ml)

    asked on May 18, 2011
  33. Physics

    A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction

    asked on April 17, 2011
  34. chemistry

    how many H2O molecules can be formed from 200 H2 molecules and 200 O2 molecules?

    asked on October 9, 2013
  35. physics

    The radius of a merry-go-round is 7 meters, and it takes 12 seconds to make a complete revolution. What is the speed of an atom on the outer rim?

    asked on October 3, 2012
  36. math

    how do you find the area of a triangle using trigonomet

    asked on September 5, 2007
  37. Math

    A square has a side length of 18 feet . This square is dilated by a scale of 1/2 to create a new square . What is the side length of the new square

    asked on March 3, 2016
  38. Math

    Alex has 7 dimes and 3 nickels.What fraction of the coins are dimes?

    asked on January 25, 2011
  39. physics

    A marble rolls off the edge of a table that is 0.82 m high. The marble is moving at a speed of 0.11 m/s at the moment that it leaves the edge of the table. How far from the table does the marble land?

    asked on November 2, 2014
  40. Chemistry

    A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?

    asked on June 11, 2010
  41. Chemistry

    Calculate the uncertainty in the position (in A) of an electron moving at a speed of (6.5 +/- 0.1)* 10^5m/s. The mass of an electron is 9.109x10^-31 kg. Thanks!

    asked on May 7, 2012
  42. Chemistry - Please Help!

    XeO3 + I- ----> Xe + I2 (acidic solution) CN)2 -----> CN- + OCN- (basic solution) MnO2 + SO32- ---> Mn2+ + S2O62- (acidic solution) H2SeO3 + H2S -----> S + Se (acidic solution) Cl2 ---> Cl- + ClO3- (basic solution) ClNO2 -----> NO3- + Cl- (acidic solution)

    asked on October 27, 2013
  43. Physical Chemistry

    Integrate the expression β = 1/V (δV / δT) at constant pressure, assuming that β is independent of temperature. By doing so, obtain an expression for V as a function of T and β at constant P.

    asked on September 22, 2013
  44. math

    what is the gross profit percent on a item bought for 3.50 at wholesale price and then sold at 5.00 for retail price

    asked on August 18, 2012
  45. english

    How does the text use clothing and garments (or the lack thereof) to portray Edna’s rebellion against Victorian norms? Use examples from the book to support your answer.

    asked on January 4, 2012

    The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric

    asked on August 1, 2011
  47. Chemistry

    Show, with equations, why the solution from which BaSo4 is precipitated cannot be allowed to be more then 0.01-0.05M in HCl.

    asked on February 16, 2011
  48. chemistry

    Manganese(III) fluoride, MnF3, can be prepared by the following reaction: 2MnI2(s) + 13F2(g) → 2MnF3(s) + 4IF5(l) If the percentage yield of MnF3 is always approximately 51%, how many grams of MnF3 can be expected if 40.0 grams of each reactant is used

    asked on October 6, 2013
  49. business/accounting

    Christy Burch and Myung Lim, partners, compared their current income statement with their income statement of a year ago. They noted that sales were 12.0% higher than a year ago. They also noted that the total expenses were 20.0% higher than a year ago.

    asked on January 17, 2012
  50. college chem

    Write a chemical equation to express the fact that, at 0 °C, ice melts by absorbing 334 J of heat per gram of ice.

    asked on November 10, 2010
  51. math

    Please Help!!!!! If i spent 3 hours in homework and of that time 1/3 on math and 1/5 on science, what method could i use to solve this problem????????? Please Help Thanks!!!!

    asked on April 24, 2014
  52. chemistry

    J. J. Berzelius collected the following data for three reactions: Reaction 1 – 11.56 grams of lead sulfide, PbS, were formed when 10.0 grams of lead reacted with 1.56 grams of sulfur Reaction 2 – 11.56 grams of lead sulfide were formed when 10.0 grams

    asked on October 9, 2013
  53. physics

    suppose you exert 150N on your refrigerator and push it across the kitchen floor at constant velocity. a. is the friction force equal and opposite to your 200N push? explain b. does the friction force make up the reaction force to your push?

    asked on November 6, 2010
  54. history

    How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism?

    asked on April 19, 2012
  55. trigonometry

    A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will

    asked on January 9, 2012
  56. trig

    A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will

    asked on January 4, 2012
  57. Physics

    Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.

    asked on April 15, 2011
  58. Physics

    How is the Sky Screamer at Six Flags an example of Newton's First Law?

    asked on August 25, 2014
  59. Statistics

    A survey of 1,000 adult Americans included the following question: "If the military draft were reinstated, would you favor or oppose drafting women as well as men?" Forty-three percent responded that they would favor drafting women if the draft were

    asked on May 23, 2014
  60. history

    How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism

    asked on April 16, 2012
  61. math for elementary teachers

    Suppose that carpeting cost $12.36 per square yard at a carpet store. what will be the cost to carpet a conference room if the rooms dimensions are 110 ft by 42 ft. (the conference room should seat 380 people using 6' diameter tables each seating 10

    asked on March 19, 2012
  62. Biology

    How does the structure of macromolecules such as proteins act as an index of relatedness between species?

    asked on March 19, 2011
  63. algebra

    How do you graph this liear inequality 2y greater than equal to 4x-6

    asked on September 26, 2010
  64. physcis

    a 16990kg airplane lands with a speed of 91m/s on a stationary aircraft carrier deck that is 115m. find workk done by nonconservative forces in stopping the plan.

    asked on March 26, 2010
  65. 8th grade pre algebra

    i am having trouble with solving inequalitys... how do you solve t+6>-3

    asked on January 19, 2009
  66. english

    what does mark twain think about slvery?

    asked on December 1, 2008
  67. physics

    A plane 65 m above the ground is flying directly toward a target at 50 m/s . Part A At what distance from the target should the pilot drop the weight?

    asked on October 3, 2016
  68. intermediate algebra

    the radiator in Johns car contains 16 L of antifreeze. How much of this mixture should be drained and replaced with pure antifreeze so there will be a mixture of 50% antifreeze.

    asked on May 6, 2015
  69. Math

    if a number is subtracted from the numerator of 3/5 and the same number is added to the denomminator of 3/5, the result is equivalent to 1. find the number

    asked on December 5, 2012
  70. chemistry

    will SrSO4 precipitate when .1g of Na2SO4 are added to 1L of a .01M solution of Sr

    asked on March 21, 2012

    the roof is a right rectangular prism and the floor is a rectangle. (its the outside of a warehouse). for the roof- the base has 51 x 51. The rectangular for the floor is 120 (l) x 20 (h) x 90 (w). need to find the volume and surface area. (counting the

    asked on March 19, 2012
  72. Algebra

    Find a power function of the form y=ax^b whose graph passes throught the points (2, 5) and (8, 12). How do i solve this??

    asked on April 30, 2011
  73. Physics

    Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find

    asked on March 20, 2011
  74. physics

    As part of a training program, an athlete runs while holding 8.00 weights in each hand. As he runs, the weights swing through a 30.0 arc in . His hands are 72 from his shoulder joint, and they are light enough that we can neglect their weight compared with

    asked on February 6, 2011
  75. college

    Assume that the life expectancy of U.S. males is normally distributed with a mean of 80 years and a standard deviation of 4 years. What is the probability that a randomly selected male will live more than 85 years?

    asked on April 29, 2010
  76. spanish

    how do you conjugate the verb preocuparse in the present tense in all forms??? Please if you know know how to do it correctly that wld greatly appriciated!!

    asked on January 13, 2010
  77. 9th grade


    asked on December 23, 2009
  78. Business Fin

    The market’s required return on Gitche Gumee Oil Company stock is currently 13.8 percent. If the expected return on the market portfolio is 12.6 percent and the risk-free rate is 3.5 percent, what is the beta of Gitche Gumee stock?

    asked on December 12, 2009
  79. Science

    What is the acceleration of a kg object if force of 3 n is applied to it?

    asked on October 4, 2016
  80. trig plz help

    Solve, finding all solutions in the interval [0, 2π). tan(3x) = -1

    asked on March 6, 2016
  81. math

    Explain and show hot to convert 0.765 to fraction

    asked on September 12, 2014
  82. psychology

    Why do negative emotions make it hard to learn or work toward a goal?

    asked on August 24, 2014
  83. Chemistry

    What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful

    asked on October 5, 2012
  84. biology

    What is meant by the statement, "Living things do not exist in isolation"?

    asked on September 11, 2012
  85. Physics Help

    A force sensor is used to measure a force applied to a 9.1 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 26.9 N. This force makes the box start to move with an acceleration of 0.2 m/s2. Find mu sub

    asked on June 18, 2012
  86. algebra 1

    Choose the product. -7p3(4p2 + 3p - 1) -28p5 - 21p4 + 7p3 28p6 + 21p3 - 7p 21p3 + 8p2 + 3p4 - 8p -21p5 + 8p4 - 3p3

    asked on June 11, 2012
  87. philosophy

    what makes an idea dangerous?

    asked on January 25, 2012
  88. physics

    A 30 kg child steps to a dock from a 60 kg boat,giving the boat an acceleration of 2m/s^2. Neglecting water Resistance, the acceleration experienced by the child is?

    asked on October 4, 2011
  89. Advance Algebra (Graphing)

    I need help finding the asymptotes, and domain of these two graphs.. 1) 1/x^2 Vertical Asym.:? Domain:? Horizontal asym.: y=0 2) x^2/1 Vertical Asym.:? Domain:? Horizontal asym.: none THANKS!

    asked on May 22, 2011
  90. math

    if sam earned $4,000 and gave 1/5 wawy and invested 1/2 of the remaining amount how much did he have left?

    asked on March 15, 2011
  91. science

    whatis the mass of a electromanetic roller coaster?the weight?

    asked on May 25, 2010
  92. math

    what are the general equations for the conic sections 1)parabola 2)circle 3)ellipse 4)hyperbola 5)inverse hyperbola

    asked on September 5, 2007
  93. Fraction

    How much pizza does eight of the friends get if they have one large pizza that they share equally.

    asked on October 11, 2016
  94. trig

    Find the exact values requested. No decimal approximations. Given that cot θ = 4 for an acute angle θ, A. Find sinθ. B. Find cos(2θ).

    asked on March 6, 2016
  95. cconcept development

    When a teacher chooses learning objectives for a child, which question should be asked? A. What should Kelly learn next? B. Where's Kelly in the learning process? C. Do the plan and materials fit my lesson? D. Has Kelly learned what was taught? a.

    asked on February 17, 2015
  96. concept development

    A basic rule in evaluating learning activities is to be sure A. the child has no prior knowledge. B. a variety of science process skills are used. C. the strategies are limited. D. the textbook provides step-by-step photos. my answer is b.

    asked on February 17, 2015
  97. Chemistry

    An original samplemof an unknown potassium chloride/potassium cholate mixture weighed 1.042g before heating and 0.943g after heating. How many grams of oxygen were released?

    asked on February 6, 2015
  98. physics

    The coefficients of friction between a 250 lb football sled and the grass are Mu(s)=0.6 and Mu(k)=0.4. For grass and cleats, Mu(s)=0.9. One 280 lb tryout exerts a horizontal push of 140 lb on the sled. What is the acceleration of the sled?

    asked on February 3, 2013
  99. Vista High school

    solve the following inequality. write your solutionin interval notation x^3-x

    asked on January 10, 2013
  100. frictionless ramp

    Suppose a 19.3 kg curling stone was on a frictionless ramp. If the ramp is 4.76 m tall and 19.5 m long (along the incline), how much mass must hang from the pulley in order that the stone not accelerate up or down the ramp?

    asked on June 21, 2012


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