Popular questions and responses by becca
  1. chemistry

    When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)

    asked on March 22, 2012
  2. Physics

    Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the

    asked on September 16, 2012
  3. Chemistry

    What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)

    asked on December 8, 2010
  4. Chemistry

    Calculate the energy of a photon of light with a wavelength of 360 nm?

    asked on December 8, 2010
  5. Physics

    A 50.0 kg parachutist jumps out of an airplane at a height of 1.00 km. The parachute opens, and the jumper lands on the ground with a speed of 5.00 m/s. By what amount was the jumper's mechanical energy reduced due to air resistance during this jump? so,

    asked on December 5, 2006
  6. Chemistry

    For another picnic, you want to make hamburgers with pickles, again without having any left over. You need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hamburger patties (which usually contain 12

    asked on January 19, 2015
  7. chemistry

    Find the molar solubility of BaCrO4 (Ksp= 2.1 × 10−10) in 3.5 × 10−3 M Na2CrO4

    asked on June 23, 2016
  8. English

    PLEASE HELP!!! Please check my answers!! I'm not sure about a few of them, but i marked the answers that I think are correct. 1. In Act IV of Romeo and Juliet, what is Friar Lawrence’s advice to Juliet concerning her parents’ wishes that she marry

    asked on March 17, 2016
  9. Calculus I

    A particle on the x-axis is moving to the right at 2 units per second. A second particle is moving down the y-axis at the rate of 3 units per second. At a certain instant the first particle is at the point (5,0) and the second is at the point (0,7). How

    asked on May 2, 2017
  10. Pre-calculus

    Jana hit a golf ball with an initial velocity of 102 feet per second at an angle of 67° with the horizontal. After 2 seconds, how far has the ball traveled horizontally?

    asked on February 19, 2013
  11. Chemistry

    A sample of unknown ore was analyzed and fgound to contain 12.7% Al, 19.7% N,and 67.6% O. What is the empirical formula of this ore?

    asked on December 8, 2010
  12. English

    PLEASE HELP!!! I'm really confused about these question from Romeo and Juliet... I marked the answers that I "think" are right but I'm not sure. Please tell me which ones i got wrong and the correct answer!?!?! 1. Why doesn’t Juliet want to marry Paris?

    asked on March 15, 2016
  13. chemistry

    If a swimmer has a lung volume of 6 at sea level, what would the volume of her lungs be when she is at the bottom of a pool that is 5 deep? Assume that the temperature and amount of the air in the lungs remain unchanged.

    asked on September 2, 2011
  14. economics

    Which goods would be included in the calculation of GDP? A. toys made in China at a factory owned by a U.S. company B. cars made in Tennessee at a factory owned by a Japanese car company C. plastic made in Kentucky and sold to a toy maker in Ohio D. cotton

    asked on February 18, 2016
  15. Pre-calculus HELP PLEASE !

    Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2).

    asked on April 12, 2013
  16. Chemistry

    At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from

    asked on February 4, 2012
  17. Science

    Quartzite and marble can look very similar. Why do you think artists carve sculptures out of marble more often than quartzite? Hint: Think composition and parent rock.

    asked on August 26, 2019
  18. Physics

    Please check my answers!! 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? I got 2223.375 Joules after Damon

    asked on February 29, 2016
  19. English

    Please help me with these question about Romeo and Juliet!!! They really are confusing me!! 1. In act 4 scene 1 of Romeo and Juliet, Paris tells Friar Laurence, "Immoderately she weeps for Tybalt's death, / and therefore have I little talked of love." What

    asked on April 7, 2016
  20. math

    Find the area of the segment of the circle. Leave your answer in terms of pi. there is a circle with a shaded area that has a 90 degree triangle in it and a 3 next to one soide of the triangle

    asked on May 4, 2013
  21. AP Chemistry Born-Haber Cycle?

    When using the Born-Haber Cycle for Na2S, do I double the ionization energy of Na since there are two Na ions for every S ion in Na2S? Also, the problem asked me to find the change in energy for S- (g) + e- => S2- (g). Assuming that you do double the

    asked on October 17, 2010
  22. math

    The vertex of a parabola is(-2,-4). One x-intercept is 7. What is the other x-intercept?

    asked on March 22, 2010
  23. Math

    A musician plans to perform 4 selections. In how many ways can she arrange the musical selections

    asked on October 29, 2009
  24. Math

    A small farm field is a square measuring 230 ft on a side. What is the perimeter of the field? If you double the length of each side of the field, what is the new perimeter?

    asked on October 29, 2009
  25. English

    Act 1 Scene 1 .. Romeo & Juliet I don't know the answer to two of my questions for Romeo and Juliet the first one . . . Although Rome and Juliet is a tragedy, much of the play is quite comic. Outline briefly the comic elements in this scene. To whatextent

    asked on February 13, 2007
  26. Physics

    A 70.0 kg base runner begins his slide into second base while moving at a speed of 4.0 m/s. The coefficient of friction between his clothes and Earth is .70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is

    asked on December 5, 2006
  27. Elementary Statistics

    Ten horses are entered in a horse race. How many permutations of 1st, 2nd, and 3rd place winners are there?

    asked on April 30, 2017
  28. Math

    Lucy spends 4 hours a week babysitting.Her Sister Lily spends 7/8 as much time babysitting. Does Lily babysit for more or less than 4 hours? 7/8•4= 20/32 But then how do I break that down ?

    asked on February 17, 2016
  29. English 9

    Please give me some advice!!!! Compare and contrast the poem "Mexicans Begin Jogging" to the story "Delfino II: Diez in the Desert". Both are written about similar themes, immigration, but the story has a more serious mood than the poem. ******** Both

    asked on January 19, 2016
  30. Physics

    As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop.

    asked on December 7, 2014
  31. physics

    98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its

    asked on June 11, 2014
  32. physiology

    Pepsin would have the greatest activity... a.)when the pH of the chyme is greater than 3. b.)immediately upon entering the duodenum. c.)immediately upon secretion into the stomach. d.)when the pH of the chyme is less than 3.

    asked on December 10, 2011
  33. Art

    What elements of painting are important to Renaissance artists?

    asked on September 17, 2011
  34. Math

    A tourist in France wants to visit 10 different cities. How many different routes are possible?

    asked on October 29, 2009
  35. Social Studies!

    2.) What is the name of the landform north of 40 degrees north latitude that juts out into the Atlantic like a giant fishhook? 3.) What flatlands extend south from the Cheapsake Bay to the east coast of Florida? 4.) From the top of which mountain range in

    asked on September 9, 2006
  36. US History

    read the passage and answer the question below. “They expressed their great satisfaction, saying that no greater good could come to them than to have our friendship, and that they desired to live in peace with their enemies, and that we should dwell in

    asked on April 3, 2020
  37. Physics

    A length 550cm of tin thread wraps around a cylinder exactly 25times. Calculate the circumference and the radius of the cylinder.

    asked on February 21, 2020
  38. Statistics

    In a study of MP3 player popularity, 22% of people in a random sample of 1100 Americans age 12 and older indicated that they owned an MP3 player. The owners were 26% of the males and 18% of the females. Suppose that there were the same number of males and

    asked on May 2, 2018
  39. Chemistry

    What is the value of [h3o] in a solution where [oh]=4.20x10^-6

    asked on November 14, 2016
  40. Math

    Seth had a bag with 4 green, 5 yellow, and 6 blue marbles in it. If Seth draws a yellow marble and does not replace it, what is the probability that the second marble he draws is yellow?

    asked on November 5, 2014
  41. English

    How could you use the words feel and turn as a linking verb?

    asked on January 14, 2014
  42. Physics

    The equation of motion for an oscillator in vertical SHM is given by y=(0.60m)sin[(130rad/s)t]. Part A What is the amplitude of this motion? Part B What is the frequency of this motion? Part C What is the period of this motion?

    asked on December 10, 2013
  43. Algebra help!

    1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by

    asked on March 28, 2013
  44. Algebra

    I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of

    asked on January 18, 2013
  45. Algebra

    Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would

    asked on January 18, 2013
  46. Algebra

    I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of

    asked on January 18, 2013
  47. Calculus

    Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.

    asked on January 29, 2012
  48. quadratic equations

    Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office

    asked on January 24, 2012
  49. Calculus

    Find the volume of the solid generated by revolving the following region about the given axis. The region in the first quadrant bounded by the curve y=x^2, below by the x-axis, and on the right by the line x=1, about the line x=-2

    asked on January 24, 2012
  50. Calculus

    Use the disk method to find the volume of the solid generated when the region bounded by y=15sinx and y=0, for 0

    asked on January 24, 2012
  51. Chemistry

    A sample of steam with a mass of .550 g and at a temperature of 1 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the

    asked on January 24, 2012
  52. chemistry

    How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C? The heat of vaporization of liquid water is 40.67 kJ/mol and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6

    asked on January 24, 2012
  53. quadratic equations

    can you solve the equation using the quadratic formula x2 + 3x = 7? Explain and provide an exact answer.

    asked on January 17, 2012
  54. calculus

    find the slope of the tangent line at the point P(1,1) on the graph of e^x-y=2x^2-y^2

    asked on January 17, 2012
  55. physics

    A propeller spins at 1850 rev/min. (a) What is the angular velocity in rad/s? (b) What is the angular displacement of the propeller in 4.10 s?

    asked on November 28, 2011
  56. math

    sig figs for.. 1.399 x by 10-3 0.0763 m2 212.080 g 673.133 K 6.69808e+06 cm

    asked on October 2, 2011
  57. physics

    A playground carousel (“merry-go-round”) is free to rotate frictionlessly in the horizontal plane (and air resistance is negligible). Without riders, the carousel has a moment of inertia of 152 kg·m2. But there is a single rider, initially standing

    asked on November 1, 2010
  58. poetry

    i need help with 3 more lines: "two boys were playing bythe curb, a trail of ants close by did swerve, the blazing sun beat down from on high, ------------------------ ------------------------ ------------------------

    asked on May 17, 2010
  59. music help PLZ

    i am on windows media player tryin to make a mix cd. i made a playlist but i wanna cut some parts into smaller pieces like if i only want a certain part of the song then it will continue to the next song does any1 no how to do that ..Like how to cut the

    asked on April 18, 2010
  60. Math

    Deandre deposits into an account that pays simple interest at a rate of per year. How much interest will he be paid in the first years?

    asked on February 26, 2010
  61. Math

    At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council consisting of 5 people is randomly selected, find the probability that 3 are from town A and 2 are from town B.

    asked on October 29, 2009
  62. science

    An unknown metal has a volume of 20cm^3 and a mass of 54g. What is the likely identity of the unknown metal? could i please have some help with this? ur help is appreciated. :D

    asked on September 29, 2009
  63. introduction to business

    cit an instance in which a surplus of a product led to decreased price.

    asked on July 15, 2009
  64. History

    Why were Americans interested in expansion northward?

    asked on October 8, 2008
  65. Algebra

    I am not sure what this question is asking. Please help. Find two consective postitve intergers such that the sum of their squares is 85.

    asked on October 7, 2007
  66. Physics

    A 215 g particle is released from rest at point A (the middle of one side) inside a smooth hemispherical bowl of radium 30.0 cm. Calculate the gravitational potential energy at A relative to B. (B is in bottom-middle of the bowl) Ok, so PE_g=mgh. How would

    asked on December 5, 2006
  67. Physics

    Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way

    asked on September 25, 2006
  68. Physics

    A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly

    asked on September 17, 2006
  69. algebra

    which of the options is a counterexample to the given conditional statement. conditional statement: if x^2=25, then x=5 the options are x=10 none,the statement is true x=-5 x=-10 i think it’s C

    asked on May 23, 2020
  70. math

    Two circles meet at A and B. A chord CD of one circle is produced to meet the other circle at E and F so that CDEF is a straight line, as shown. The common chord AB is produced to meet the line CF at a point M between D and E. If M is the midpoint of CF

    asked on July 21, 2019
  71. social studies

    what are all the answers to lesson 4 unit 4 in connexus? I am stuck on this question after an excerpt- According to the excerpt, who had more power under the Articles of Confederation? 1) it gave a majority of the power to the national government, and

    asked on October 22, 2018
  72. Math

    How do you evaluate 16(2^-3 - 4^-2)?

    asked on August 25, 2018
  73. Math

    The dome over the town hall has a parabolic shape. I measure 48 m across and rises 12 m at its center. Determine the quadratic equation that models the shape of the parabola. I have learned the formula y = a(x-s)(x-t).

    asked on August 1, 2018
  74. Math

    In the Doubles Game, students can win carnival tickets to spend on games and food. A player pays one ticket to roll two number cubes(six-sided dice). If the numbers match, the player wins five tickets. If a player plays this game 20 times, about how many

    asked on May 29, 2017
  75. Chem

    Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?

    asked on March 7, 2017
  76. K12

    Is anyone in K12 here or FLCCA that could help me in Algebra 2???

    asked on December 6, 2016
  77. Math

    the top of a rectangular table has a length that is two times it's width. The perimeter of the tabletop is 144 inches. What is the width of the tabletop?

    asked on November 17, 2016
  78. Social Studies

    Why did Adams increase the size of the American Navy? He wanted to prepare for all-out war on Britain He hoped it would deter more attacks by French ships He needed to use tax money to fund an increase in military spending Congress passed a law that

    asked on October 17, 2016
  79. Physics

    Two positive charged spheres, one with 2 times the charge of the other are 38 cm apart. The net force between them is 0.77 N. What is the charge on the lesser charged sphere?

    asked on May 25, 2016
  80. Math

    The ratio of the length of a rectangle to the width of a rectangle is 5:2 if the link is 45 centimeters what is the width of the rectangle in centimeters

    asked on May 17, 2016
  81. Spanish

    PLEASE HELP!! I'm confused because I know that the conjugated form for "yo" is digo, but I think it might be decir also because its translated as I have to tell the truth, and decir means "to tell." Yo tengo que _______ la verdad. decir dicen decimos digo

    asked on April 26, 2016
  82. Geometry (PLEASE HELP!!!)

    Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it

    asked on April 14, 2016
  83. Geometry

    Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it

    asked on April 14, 2016
  84. Physical Science

    Please check my answer!! I would be great if you could explain this to me a little as well... To find the amplitude, measure_____ a. the horizontal distance between consecutive positions b. the horizontal distance between a consecutive crest and trough c.

    asked on April 8, 2016
  85. Trigonometry

    PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not

    asked on March 30, 2016
  86. Math

    A girl stands 7 meters away from a building. The angle of elevation from where she stands is 25 degrees. How tall is the Building?

    asked on March 6, 2016
  87. Physics

    Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board?

    asked on February 29, 2016
  88. English grammar.

    Please check my answer! What is the capitalized phrase? TO SCORE ACCURATELY, bowlers must learn what the terms spare, strike, and split mean. Infinitive phrase**** Gerund phrase Adverb phrase none of the above I though that the capitalized phrase was an

    asked on January 14, 2016
  89. Social Studies

    Which of these factors MOST shaped American identity? A: The United States is located in North America. B: Aristocratic royal governors oversaw the earliest British colonies. C: Early colonists grew cash crops and replied on natural resources to survive.

    asked on November 10, 2015
  90. Chemistry

    A solution is prepared by dissolving 0.1 mol of ethanoic acid (CH3COOH) in 500ml of water at 25 C. pKa of ethanoic acid is 4.7. What is the pH of the solution? I'm assuming the equation is pH = pKa + log[Base]/[Acid] but can't get it to work?

    asked on October 21, 2015
  91. Statistics

    How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the

    asked on June 19, 2015
  92. Chem

    You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.7 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to

    asked on April 19, 2015
  93. Inorganic chem

    What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle?

    asked on April 16, 2015
  94. algebra 1

    A town is organizing a parade. There will be floats of only 2 sizes, 30ft. and 15ft. A space of 10 ft. will be left after each float. a. the parade must be at least 150 feet long, but less than 200ft long. what is the combinations of large and small floats

    asked on January 9, 2015
  95. algebra 1

    You have $100 to go shopping. A store sells shirts for $15 and dress shirts for $22. You want to spend no more then the amount of money you have. You want to leave at most $10 unspent. you need to buy at least one dress shirt. What are all the possible

    asked on January 9, 2015
  96. Multiplying Polynomials

    Use the distributive property to write (each of) the following expression(s) as the sum of monomials. M. (t - 1)(t + 1)(t^2 + 1) I already know that I must multiply across, but I am a bit confused regarding the order to multiply in and which variables to

    asked on January 9, 2015
  97. Math

    My locker combination has three digits. None of the digits are 0. What is the probability that the first digit of my locker combination is less than 3?

    asked on November 5, 2014
  98. Algebra

    What are two numbers that add to 615 but multiply to -90000? I'm trying to factor the quadratic x^2+615x-90000

    asked on October 23, 2014
  99. Physics

    An artillery shell is fired at an angle of 67.4◦ above the horizontal ground with an initial speed of 1560 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Find its horizontal range,

    asked on October 23, 2014
  100. algebra

    Determine the value of each expression 25% of 200

    asked on April 3, 2014


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