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Newest questions posted by a
  1. Chemistry

    11 mL of 0.0100 M HCl are added to 25 mL of 0.0100 M acetic acid. What is the pH of the resulting solution?
  2. Math

    -9=5/17n A. n=153/5 B. n=5/153 C. n=-17/45 D. n=-45/17
  3. Math

    3(p+q)=p solve for p
  4. Math

    What is the simplified version of this expression 28st/-4t the / meaning its a fraction
  5. Homework help

    Is there any way to post questions with pictures?
  6. History

    What impact did imperial Spain have on the Americas? Spanish culture came to dominate and replace native cultures. Local leaders were replaced by Spanish parliamentary assemblies. Financing from Spain started the industrialization of the Americas.
  7. Calculus2

    Find the area of the region enclosed by the inner loop of the curve. r = 4 + 8 sin(θ)
  8. calculus2

    A manufacturer of corrugated metal roofing wants to produce panels that are u = 48 in. wide and 2 in. thick by processing flat sheets of metal as shown in the figure. The profile of the roofing takes the shape of a sine wave with equation y = sin(πx/12).
  9. calculus2

    How do I evaluate this integral? integral from 0 to 24 of the √(1+[(π/3)*cos((πx/3)]^2)
  10. calculus2

    Evaluate the integral. ∫arctan(√x) dx
  11. calculus2

    Evaluate the integral. ∫[0,1](12/4x^2+5x+1)dx
  12. calculus2

    Evaluate the integral using the indicated trigonometric substitution. (Use C for the constant of integration.) ∫√((x^2-4)/x)dx x=2sec(t)
  13. calculus2

    A tank is full of water. Find the work required to pump the water out of the spout. (Use 9.8 m/s^2 for g. Use 1000 kg/m^3 as the density of water. Assume r = 9 m and h = 3 m.) The tank is a spherical shape with r as the radius(9m). On top of the tank is a
  14. calculus2

    Use cylindrical shells to find the volume V of the solid. A right circular cone with height 9h and base radius 5r. The answer is 75πhr^2 but my answer is 39πhr^2. How???
  15. calculus2

    Use cylindrical shells to find the volume V of the solid. A sphere of radius r
  16. calculus2

    Find the volume V of the solid obtained by rotating the region bounded by the given curves about the specified line.y = x − 1, y = 0, x = 8; about the x-axis.
  17. calculus2

    Find its area. y = sec^2(x), y = 8 cos(x), −π/3 ≤ x ≤ π/3
  18. chem

    Why does temp of water used for transferring and washing the precipitate matter? 1. to maximize evaporation 2. to minimize evaporation 3. to maximize the amount of product that dissolves in water
  19. Language Arts *Last One I Promise*

    1. If you were writing a brief profile of Rosa Parks explaining why you admire her, which of the following sentences would make the best thesis statement? In 1955, Rosa Parks refused to give up her seat on a bus. Rosa Parks's refusal to give up her seat
  20. chem TITRATION

    1. If a student fails to remove a large air bubble in the buret before beginning the titration, what will be the effect on the volume of titrant required to reach the titration endpoint? A. The student will record a volume that is SMALLER than it should be
  21. Language Arts

    *First off sorry there are so many, I just wanted to check because it's always better safe than sorry* Identify the correctly punctuated sentence in each group. A.) Do you know where Bailey shoes are? B.) Do you know where Bailey's shoes are?* C.) Do you
  22. Language Arts

    Identify the incorrectly punctuated sentence The child wore a pink cotton shirt. We had a tiring, hot day outdoors. She cooked a delicious healthy meal.**** (I think it's missing a comma) The game was a suspenseful, exciting experience.
  23. LA

    . Which of the following quotes from "The Morning of June 28, 1948" Best describes the aversion that the public felt toward Shirley Jackson's short story "The Lottery?" A) “As a matter of fact, when I read it over later I decided that except for one two
  24. Language Arts

    n Edgar Allan Poe's "The Cask of Amontillado," the literary device of foreshadowing is used to create mystery when Montressor tells Fortunato a. "You are a man to be missed." b. "A draught of this Medoc will defend us from the damps." c. "You were not to
  25. conversions math

    convert 70.5 in^3 to cubic feet? how would you convert this
  26. chemistry

    If you have 1.00 M sodium chloride solution, and you have 300. mL of it, how many grams of sodium chloride are there?
  27. Social Studies

    How did the end of world war 2 impact Minnesota's economy? How did the GI Bill help encourage economic growth in Minnesota and the rest pf the naiton? How are the growth of highways and suburbs related?
  28. Chem

    A dilute aqueous solution of Na2SO4 is electrolyzed between Pt electrodes for 3.70 h with a current of 2.77 A . Part A What volume of gas, saturated with water vapor at 25∘C and at a total pressure of 742 mmHg , would be collected at the anode? The vapor
  29. Chem

    At 298 K, 1.20 mol BrCl(g) is introduced into a 10.0 −L vessel, and equilibrium is established in the reaction. BrCl(g)⇌1/2Br2(g)+1/2Cl2(g) A) Calculate the amount of BrCl(g) present when equilibrium is established. [Hint: Use ΔG0[Br2(g)]=3.11kJ/mol,
  30. chemistry

    At 298 K, 1.20 mol BrCl(g) is introduced into a 10.0 −L vessel, and equilibrium is established in the reaction. BrCl(g)⇌1/2Br2(g)+1/2Cl2(g) A) Calculate the amount of BrCl(g) present when equilibrium is established. [Hint: Use ΔG0[Br2(g)]=3.11kJ/mol,
  31. Physics

    The binding energy of a nucleus is the amount of energy needed to A.Remove a proton from the nucleus. B.Remove a neutron from the nucleus. C.Disassemble the nucleus. D.Fragment the nucleus. E.Fuse or join two of the nuclei together. Please help!
  32. physics

    A 68 kg stunt- woman falls off a bridge and travels 32.0 before colliding with a pile of mattresses. The mattresses are compressed 2.00 m before she is brought to rest. Calculate the magnitude of the average force exerted by the mattresses on the
  33. Writing

    Essay question: How does playing violent video games influence violence in those who play them? Playing violent video games influence violence in those who play them? *Those who play them: I clarified my audience to specifically adolescents because young
  34. Physics

    On a cold winter day, the outside temperature is –5.0 °C while the interior of a well-insulated garage is maintained at 20.0 °C by an electric heater. Assume the walls have a total area of 75 m2, a thickness of 0.15 m, and a thermal conductivity of
  35. Chemistry

    What is the final temperature when 2.50 x 10^5 J are added to 0.950 kg of ice at 0.0 degrees C? The specific heat capacity of water is 4186 J/(kg·degrees C) and the latent heat of fusion for ice is 3.35×10^3 J/kg.
  36. physics

    If a very large iceberg were to float to warmer waters and melt, what, in principle, would happen to the overall sea-level? A. sea-level would rise very slightly. B. sea-level would fall very slightly. C. sea-level would stay the same. *I would say A
  37. Physics

    A basketball player makes a jump shot. The 0.650-kg ball is released at a height of 1.80 m above the floor with a speed of 7.80 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air
  38. Calculus

    The total stopping distance T of a vehicle is shown below, where T is in feet and x is the speed in miles per hour. T = 2.5x + 0.5x^2 Approximate the change and percent change in total stopping distance as speed changes from x = 15 to x = 18 miles per
  39. physics

    An electron experiences an electric force of 0.70 nN . What’s the field strength at its location?
  40. math

    A parking lot space is in the shape of a rectangle. If the space has a length of 23 feet and a width of 12 feet, what is the area of the parking space?
  41. Calc (Derivatives)

    I understand finding the derivative and there is a simpler way of doing so, however, can someone show you derive at these answers by the DEF'N of Derivatives? Much appreciated! Question 1: Find, from the definition, the derivative, f'(x), for
  42. Calc: Limits

    how to calculate the limit: *I got confused especially with the square root. 1. lim as x approaches 2 (squareroot x^2 +5)-3 / (x-2) 2. lim as θ (theta) approaches zero (tan^2 (5θ) / (sin (3θ) sin (2θ) )
  43. English comp

    I need suggestions on how I could rephrase these without being repetitive and that the point comes across. Thank you (: 1. Alcohol is a dangerous recreational substance that many Americans very much abuse to what their body could take. 2. The reason why
  44. help[

    what is a + a?
  45. Physics

    A girl delivering newspapers travels 1 blocks west, 2 blocks north, then 4 blocks east. What is the magnitude of her resultant dis- placement? Answer in units of blocks. 002 (part 2 of 3) 10.0 points Find the direction (measured from due east, with
  46. Algebra 1

    Breathless Cosmetics now offers 24 shades of eye shadow, 20% more than last year. How many shades were offered last year?
  47. statistics

    In the game of​ roulette, a wheel consists of 38 slots numbered​ 0, 00,​ 1, 2,..., 36. To play the​ game, a metal ball is spun around the wheel and is allowed to fall into one of the numbered slots. If the number of the slot the ball falls into
  48. Bio

    There are a lot of components to the question. How can I answer this with a paragraph? Need help. Explain the role of sex chromosomes in inheritance> Answer must include: 1. Anatomical differences as result of XX/XY, 2. Arrangement and structure of X and
  49. physics

    an 85.0kg mountaineer remains in equilibrium while climbing a vertical cliff. the tension force in the supporting rope is 745 N. Find the magnitude of the reaction force F, which the cliff exerts on the mountaineer's feet.
  50. Physics

    Two cars with different motors are competing. One of the cars accelerate från 0-90 km/h on 12 seconds, the other one accelerate from 0-90 km/h on 20 seconds. The acceleration is the same all the time. After 90km/h, the velocity is constant. How many
  51. Physics

    A train has a velocity of 117 km/ h and discover another train standing stil 1200 meters away. The train starts immediately to brake. After 10 seconds the other train finally starts to move away from the first train. The acceleration is equable of both
  52. Math

    Complete the table and state the rule. Input | Output 0|0 |3 2| 3|9 | 5|15 6| I think the rule is Output = Input x 3 but I don't know how the rule should be worded. I think the chart should look like: Input | Output 0|0 1|3 2|6 3|9 4|12 5|15 6|18
  53. la

    The speaker in "Birches" compares the boy's climbing to a. girls dying there hair b. sweeping up broken glass c. a forest full of spiderwebs d. filling a cup to the top I think D
  54. History

    Economic principle # 1 is " principle choose". Employers choose to offer benefit packages to their employees. Apply the key economic principle "the consequences of choices lie in the future" to this decision. What are the important costs and benefits that
  55. Calculus

    Rectilinear Motion Discuss the Velocity, Acceleration, and Speed: 1. s(t)=2t^2 +8t-7 2. s(t)=3t^4 -16t^3 +24t^2
  56. Trigonometry

    State the quadrant in which theta lies. sin(theta) > 0 and cos(theta) > 0 How can I determine this? Please explain.
  57. Trigonometry

    Point P is located at the intersection of the unit circle and the terminal side of angle theta in standard position. Find the coordinates of P to the nearest thousandth. theta = -105degrees Please explain the steps. I'm completely stuck.
  58. Math

    In an examination of a certain class, at least 70% of the students failed in Physics, at least 72% failed in Chemistry, at least 80% failed in Mathematics and at least 85% failed in English. How many at lest must have failed in all the four subjects ?
  59. Math

    Write a rule for the nth term of the arithmetic sequence. -12, -5, 2, 9
  60. Science

    A fungus called stem rust penetrates the cells of a wheat plant, causing water loss, destruction of food-producing parts, and retarded root developemtn. Both the yield and quality of the grain are reduced. This relationship of stem rust to wheat would best
  61. ALGEBRA CHECK ANSWERS

    Solve each equation by graphing the related function. If the equation has no real-number solution, write no solution. NOTE: when I write + it has a minus on the bottom too x^2+7=0 a. x= +7 b. x = +3.5 c. x= 0 d. no solution *** 3x^2=0 a. +3 b. +1/3 c. 0
  62. Chemistry

    1. Not sure of how to do the calculations... Make a 0.200 m solution of NaCl in a 100. mL volumetric flask. ... Solution A's question or statement is the same but with M (molarity) Is this right? The small m means molality. If it were changed to capital M,
  63. economics

    given the following information, calculate nominal GDP, real GDP, and the percentage increase in year two. Be sure to label the answers. Describe what is taking place in the economy. In the base year, 10 new cars were sold at $7,000 each, 20 new office
  64. Mental Health

    If the correlation between one’s interest in statistics and being a “fun date” was –0.70, it would mean that: a. The higher someone’s interest was in statistics, the more likely it would be that he or she is a fun date b. The higher someone’s
  65. behavior health

    According to classical test theory, if the observed variance of a test is 50 and the true variance is 40, what is the estimated reliability of the test? a. 0.40 b. 0.50 c. 0.80 d. 0.90 I selected C for my answer 40/50 is the .80 If the correlation between
  66. math

    what is the possible number of outcomes in choosing a book to read from 7 fiction and 9 non fiction books?
  67. Life Span Development

    Social skills training programs are interventions in which children are taught specific, discrete behaviors that can facilitate effective social interactions, like making eye contact and asking appropriate questions. Assessments of these interventions
  68. Life Span Development

    1. In adolescence and early adulthood, males and females begin to spend more time in mixed-gender groups. Studies of who has more influence on the outcome of problem solving in mixed-gender groups indicate that: A. Females have an advantage because they
  69. Life Span Development

    1. Levels of social cognitive __________ do not always match __________. A. reasoning / behavior B. attributions / behavior C. behavior / biases D. attributions / reasoning
  70. English

    Pick three themes from Lord of the Flies and write a PEE paragraph about each. I have chosen savagery, youth and power/order as my themes. I know to write stuff about the conch and the chief for power/order but I don't know hat else to write for the rest.
  71. ms.sue

    who is ms.sue? i've seen her a lot on the answers and she's EVERYWHERE!! is there only 1 ms.sue?
  72. History

    The Federalists and the Democratic-Republicans emerged as separate political parties partly as a result of disagreement over
  73. Algebra

    The cost of producing 4 metal units is $204.80. The cost of producing 8 units is $209.60. What will it cost to produce 14 units?
  74. maths probability

    a spinner is marked green yellow red and blue. neel conducted an experiment spinning the spinner several times
  75. Physics

    A bungee jumper runs off a platform and falls 40m before his bungee cord begins to stretch. Once the bungee cord begins to stretch his velocity slows by 20 m/s in 12m. If the mass of the bungee jumper is 55kg, what is the average force the bungee applies
  76. Physics

    You set up a ramp with a length of 1.15 m, raising one end to a height of 0.4 m. You then roll a 0.300 kg toy car down the ramp, starting at rest a)What is the change in potential energy of the toy car rolling down this ramp? b)If all of that energy is
  77. CHEM 1301

    A sample of propane, C3H8, contains 12.2 moles of carbon atoms. How many total moles of atoms does the sample contain?
  78. Math Quadratic Functions

    Quadratic equation always do what to their inputs? How can I answer this question..?
  79. english 101

    how would you write a thesis statement on adoption
  80. Pre-cal

    Solve (in radians) sec x = 2csc x When I work it out, it gets to 2cot x - 1 = 0 cot x = 1/2 Would it be ok to use tan^-1 (2) ? I must demonstrate it with a graph as well... would the line go through Q I/III or II/IV ? Thank you!
  81. Physics

    A ball hanging from a twisted string is released from rest, and spins around in a circle (reversing direction periodically). The angular velocity of the ball is given by: 𝜔(𝑡)=(16 𝑟𝑎𝑑/𝑠) sin[(𝜋/5 𝑟𝑎𝑑/𝑠)𝑡] Find the number
  82. Physics

    As part of a daring rescue attempt, the Millennium Eagle coasts between a pair of twin asteroids, as shown in the figure below where d1 = 2.55 km and d2 = 1.28 km. The mass of the spaceship is 2.53 x10^7 kg and the mass of each asteroid is 3.70x10^11 kg.
  83. Science , Biology

    Why does a sorting process only work when variation is present in a population?
  84. History

    A: Passage of the Currency Acts B: Passage of the Intolerable Acts C: Passage of the Navigation Acts D: Passage of the Stamp Act 2. Which of the following pairs did NOT disagree throughout the colonial period A: Patriots and loyalists B: Christopher Gadsen
  85. Science, English

    how would you define a sorting process? A creative process?
  86. Science,

    Can you write a
  87. Science

    a. Choreographing a performance b. Straining pasta from water after you finish cooking it c. Earning a grade based on how many questions you answered d. Answering an essay question e. Determining who is tall enough to ride a roller coaster f. Making a clay
  88. English

    Which one is correct? did you go to the class yesterday? OR did you went to the class yesterday?
  89. Eng

    In the movie, silence of the lambs, dr.lector says " memory is all I have instead of a view." How can this be used to analyze his motives of crime? I think it may be related to how he is uncounciously being reminded of his past with the memories. But what
  90. Eng

    what does "laying the foundation of human rights violation mean"? Especially when you are taking about how someone's acceptance of something lays the foundation of human rights violations
  91. English

    I was wondering what does "crime is a social construction" mean. Also, is it the same as "social construction of crime"?
  92. Physics

    An arrow is shot from a height of 1.4 m toward a cliff of height H. It is shot with a velocity of 28 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 3.6 s later. a) What is the height of the cliff (in m)? I got 25.191 m
  93. Math

    Simplify: ((4/x)^(n-m))×((2x^2)^m) I don't even know where to start
  94. math

    You have 6 black socks and 4 white socks. what is the sample space? I think it should be 45 possible combinations.
  95. J

    the decimal expansion of 147/120 will be terminate after how many decimal
  96. world history

    Which statement best describes the period known as the Old Kingdom? A.) it was a time of dynastic uncertainty B.) it was a time of development C.) it was a time of great geographic expansion D.) it was a time of disunity My answer - A
  97. Accountency

    Journal entry:paid three months rent.Rs 3000
  98. A

    You have just landed your first summer job and your boss has told you that you can choose from one of 3 pay structures for the first week (7 days) that you work there. And after the first week, your pay will be frozen at the final rate for the remainder of
  99. Math

    In a sine function, can you replace the phase shift by changing the period? Why or why not?
  100. math

    Rueben drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 7 hours. When Rueben drove home, there was no traffic and the trip only took 5 hours. If his average rate was 18 miles per hour faster on the trip home,

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