Popular questions and responses by Nelson
  1. physics

    the magnitude of vector A is 35 units and points in the direction 325 degrees counterclockwise from the positive X-axis. calculate the X and y components of the vector

    asked on September 27, 2015
  2. vhem

    What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

    asked on March 31, 2008
  3. Physics

    A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 16.0 m/s,at an angle of θ = 51°, from the horizontal. The boy's father reaches up and catches the ball over his head,

    asked on February 6, 2015
  4. math

    a couple goes out to dinner,wchich costs $ the nearest dollar,what should they pay in total,if they tip 15% on the bill? 1] $45 2] $50 3] $51 4] $52 5] $53

    asked on November 15, 2012
  5. Calculus

    Function f(x) is positive, increasing and concave up on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the upper sum, lower sum, and trapezoidal rule approximations for the value of

    asked on June 20, 2018
  6. chem

    1. What is the [K+] of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml of solution? 2. What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

    asked on March 31, 2008
  7. Chemistry

    (1)Make 500 ML of 4N H3PO4. How many grams will be needed? (2) In a titration procedure, 20mL of 2N solution were required to titrate 5mL of an unknown solution. What is the normality of the solution? (3) How much of a 0.01M can be made from 20mL of 6M

    asked on January 30, 2017
  8. math

    The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?

    asked on September 11, 2016
  9. algebra

    A cash register contains only five dollar and fifty dollar bills. It contains four times as many five dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,870. How many fifty dollar bills are in the cash register?

    asked on February 8, 2015
  10. math

    there are twice as many woman as men in the union at global products altogether 84 workers at the plant are union many of them are woman? 1]28 2]32 3]47 4]56 5]61

    asked on November 15, 2012
  11. Physics

    A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has

    asked on October 3, 2011
  12. Biology- Amylase

    Hello, In our class, we are doing a hypothetical digestion of starch by amylase lab. I do not know where to begin with this following information. If I add Benedict's solution (which I know will change color when the presence of sugar is noted). After all

    asked on November 4, 2007
  13. college

    Maggie has 3/4 apple .She eats 1/2 of it.What fraction of the apple does eat

    asked on October 25, 2016
  14. Math

    Why is it important to line up the fraction strips on the left?

    asked on March 19, 2012
  15. physics

    A stone is tied to a string (length = 1.05 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

    asked on November 12, 2011
  16. Math

    If two of the line segments of a polygon are parallel, what is the least number of sides it could have?

    asked on November 8, 2011
  17. Math

    Show how the Commulatice Property of Addition works using the number 2, 3, and 5.

    asked on September 20, 2011
  18. spanish

    How do I say "sue me" in spanish?

    asked on April 24, 2011
  19. geometry

    Rectangle ABCD has diagonals AC and BD. If the diagonal lengths are AC = 36 cm and BD = (3x + 3) cm, find the value of x

    asked on February 8, 2011
  20. Algebra

    Need a formula; the product of two consecutive integers is 41 more than their sum. Find the integers.

    asked on December 7, 2009
  21. principles of microeconomics

    show how a total product curve for an input can be derived from an isoquant map.

    asked on November 11, 2007
  22. Setswana

    Botshelo jwa maloba bo gaisa jwa segompieno

    asked on February 2, 2020
  23. algebra

    one half of a number decrease by 16

    asked on July 18, 2017
  24. Math

    There are 16 plants in Allison's garden.Of these, 2/8 are tomato plants. How many tomato plants are in Allison 's garden?

    asked on July 2, 2017
  25. math

    A 200g alloy is made of copper and zinc. the number of copper atoms is 3 times that of zinc, a)calculate the number of copper and zinc atoms. b)calculate the weight of copper and zinc in the alloy. so for a) can i assume that the mol ratio is cu:zn = 3:1?

    asked on April 28, 2017
  26. Chemisty

    How many grams of HNO3 will be contained in 300 mL of a 5 N solution?

    asked on January 30, 2017
  27. Physics

    Draw a block and tackle system of pulleys with a velocity ratio of 5.A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distanceof 40cm at a steady rate. If the efforts is equal to 60N, determine a)d distance

    asked on January 4, 2017
  28. calculus

    Integral High value= 4 lower value=0 f(x)dx f(x) = 2, x < 2 x, x ≥ 2 It's asking me to use geometric formulas to solve this without a shape given. What am I supposed to do?

    asked on November 7, 2016
  29. Calculus

    Find the Riemann sum for f(x) = sin x over the interval [0, 2π], where x0 = 0, x1 = π/4, x2 = π/3, x3 = π, and x4 = 2π, and where c1 = π/6, c2 = π/3, c3 = 2π/3, and c4 = 3π/2.

    asked on November 7, 2016


    asked on October 30, 2016
  31. math

    in class 2/3 of the learners do school sports.Of the learners who do sport ,3/5 play soccer.what fraction of the class plays soccer

    asked on October 25, 2016
  32. math

    in a grade 12 ,3/4 of these class girls and 1/3 og these girls play netball. what fraction of the class plays netball

    asked on October 25, 2016
  33. maths

    in your class 5/6 of the learners are good with mathematics.Of these 3/4 enjoy geometry.What fraction of the class enjoy geometry

    asked on October 25, 2016
  34. Precalculus

    The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?

    asked on September 11, 2016
  35. Chemistry

    Hello, please I need help with this excersice of chemical equilibrum. I really don't get what "1:6" means and how can I use that proportion". The excercise says: "0,014" moles of HCl are dissolved in water in a proportion of 1:6 (1 mole of HCl per 6 moles

    asked on August 27, 2016
  36. Physics

    Calculate the formula for coefficient of kinetic friction in an inclined plane with a pulley and two masses coonected by a rope. You can only use the weight of the two masses, the height where the second object is and the distance that the first object

    asked on June 29, 2016
  37. US History

    In what ways would a person's race affect his or her perspective on the war? What role did the media play in the development of popular thinking related to the war?

    asked on February 2, 2016
  38. physical science

    If the mans weight is 490N on earth,calculate his weight on the moon that has the gravitational force 1/2 of the gravitational force of the aerth

    asked on February 25, 2015
  39. ap chemistry

    glycerin C3H8O is a nonvolatile liquid. what is the vapor pressure of a solution made by adding 164 g of glycerin to 338 mL of H2O at 39.8C. The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3 P solution= X solvent p

    asked on January 11, 2015
  40. world history

    Industrial revolution

    asked on October 30, 2014
  41. Algebra

    I need help with this problem, and I think it's a perfect square trinomial problem. X^2+22+121-y^2 I know 11 is the square of 121.

    asked on October 18, 2014
  42. L.O


    asked on May 5, 2013
  43. Math -3

    How do I write a mixed number fractions greater than 1. 6/5 13/5 9/5 17/5 How do I solve it?

    asked on January 10, 2013
  44. Math

    Rachel gave 1/4 of a pie to each of 5 friends. How many pies did she give to her friends in all? Write the mixed number. Ms. Fuller has 2 2/6 pies left over from her party. Write the number of pies left over as a fraction greater than 1. How do I arrive at

    asked on January 8, 2013
  45. number sense

    I am greater than 4 tens and less than 5 tens. I have 9 Inés. What nombre I am?

    asked on November 29, 2012
  46. math

    what is the least amount they could spend to purchase the plants they have chosen? 1]$62.00 2]$53.00 3]$50.00 4]$36.00 5]$28.00

    asked on November 15, 2012
  47. math

    jim and alice moore decided to plant a garden with 3 hosta plants,6 lavender plants,60 tulips,and a dogwood.the cost of the plants is as follows. hosta: $3.00 each or 3 for $8.00 lavender:$ 1 00 each or 3 for $2.00 tulips:10 for $4.00 dogwood:$14.00 each

    asked on November 15, 2012
  48. physics

    A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it

    asked on April 11, 2012
  49. chemistry

    Find the molar heat of vaporization for a substance, if 3.28mol of the substance absorbs 24.8 kJ of energy when it changes from a liquid to a gas. Answer in units of kJ/mol

    asked on March 1, 2012
  50. Math

    How can you use a multiplication fact to find a division fact?

    asked on February 11, 2012
  51. Total Quality Management

    Find the standard deviation of 32,15,54,18,and 46

    asked on December 3, 2011
  52. university

    A surfer is catching a wave. Suppose she starts at the top of a wave with a speed of 1.37 m/s and moves down the wave until her speed increases to 9.90 m/s. The drop in her vertical height is 2.64 m. If her mass is 63.3 kg, how much work is done by the

    asked on November 22, 2011
  53. Math

    How many vertices, edges, and faces does pyramid have?

    asked on November 21, 2011
  54. Math

    Why is estimating before you subtract a good idea?

    asked on October 19, 2011
  55. math

    Find the sum using mental math 24 + 71 =

    asked on October 3, 2011
  56. math

    A number rounded to the nearest thousand is 6,000. It has a 5 in the thousands place. Name the digits that could be in the hundreds place.

    asked on September 28, 2011
  57. Math

    Sun-Yi estimated 270 + 146 and got 300. Is her estimate reasonable? Explain.

    asked on September 22, 2011
  58. Math

    Miguel has 325 baseball cards and 272 football cards. He said that he has 597 cards in all. Is his answer reasonable? Explain using estimation.

    asked on September 22, 2011
  59. Math

    Natalie has 138 DVDs and 419 CDs. If you were to estimate the sum of the DVDs and CDs, what sentence could you write? Then find your estimated sum.

    asked on September 22, 2011
  60. Math

    Write each missing number 3 + = 5+3

    asked on September 20, 2011
  61. math

    Jill knows her average score on five tests is 88. She can find all but one test. She has tests with scores of 96,83,100, and 79. What is the missing test?

    asked on April 8, 2011
  62. math

    If an object is reflected twice over parallel lines, and corresponding points of the original and final translation image are 30 centimeters apart, how far apart are the parallel lines?

    asked on March 24, 2011
  63. English

    Invent something that would make doing homework easier. Explain it 5+ sentences. Copy into paragraph format.

    asked on February 3, 2010
  64. algebra

    6m^2 + 12m + 5=0 solve for m

    asked on December 9, 2009
  65. algebra

    2x + 4 / 10x2 +24x + 8 simplify

    asked on December 9, 2009
  66. algebra

    simplify 2x + 4 / 10x^2 + 24x + 8

    asked on December 8, 2009
  67. English- textual history

    What does it mean to research a textual history of a work? i.e. Hamlet's textual history

    asked on December 11, 2007
  68. science

    what is the density of a material that has a mass of 54.457g and a volume of 13.5cm

    asked on October 3, 2007
  69. Sequences...again

    Sequence T1 is obtained by adding the corresponding terms of S(sub) and S(sub2). so that T(sub1) = {2.6, 3.39, 4.297, 5.3561, . . .}. We shall write T(sub1) = S(sub1) + S(sub2) to convey the addition of S(sub1) and S(sub2) in this way. Is T(sub1) an

    asked on September 30, 2007
  70. Sequences

    A = {a1, a1 + d1, a1 + 2d1, …}, B = {a2, a2 + d2, a2 +2d2, …}. Investigate whether A + B and A x B are arithmetic or geometric sequences. If an arithmetic sequence is identified, state its common difference. If a geometric sequence is identified, state

    asked on September 30, 2007
  71. homeland security

    2-3pgs You just received intelligence that and international terrorist group has selected a major target in a major U.S. city. The terrorist are known for their hatred of capitalism and Western culture, and their intent is to wage a voilent canpaign

    asked on September 25, 2007
  72. Review of Logs

    I can't seem to get the answer to this; the answer key says log(base 8)6 Write as a single logarithm log(base 8)42log(base 8)3 - log(base 8) 6 I'm hoping the key is wrong :) Thank you for your help!

    asked on September 24, 2007
  73. Law inforcement operations & Report writing

    Choose 1 area within the criminal justice system, such as law enforcement, corrections, or the courts. Identify and describe specifics issues raised in dealin with mentally ill individuals by the professionals in that aspect of the criminal justice system.

    asked on May 22, 2007
  74. introduction to us constitution

    The 4th and 6th amendments. Why are they necessary to the criminal justice system? Identify two areas or situations in the modern world that could be benefit from a clarification or modification of these rights. Once identified can you please describe the

    asked on May 22, 2007
  75. science

    i know the steps but i still cant seem to write skeleton equations and balance them. can you help

    asked on March 28, 2007
  76. BIO?

    how would increase in adrenaline change blood glucose levels? Look under Actions in the body at:

    asked on March 14, 2007
  77. Biology

    I was wondering if you could double check my work thanks! Kidneys play a major homeostatic role in regulating body fluids. Which would not be a reasonable inference? A.

    asked on March 13, 2007
  1. mathematics

    a wooden stool in the form of a frustrum a cone with a slant edge 40cm top diameter 30cm and bottom diameter 50cm calculate perpendicular height of stool

    posted on May 23, 2020
  2. maths

    Not able to finish

    posted on October 6, 2019
  3. basic electroincs

    when getting the period, why did you multiple by 2?

    posted on November 25, 2018
  4. Social Studies


    posted on November 7, 2018
  5. mathematics

    solve the questions for me

    posted on November 7, 2018
  6. BIO chemistry


    posted on June 4, 2018
  7. History


    posted on January 11, 2018
  8. math

    i dont know

    posted on August 15, 2017
  9. CAT, mathematics literacy , business studies ,hist

    which career should i follow

    posted on January 27, 2017
  10. History

    nojoda chica

    posted on November 29, 2016
  11. Chemistry

    Hello, thanks to answer my question. .. I was thinking about the answer because it give me a negative pH ... Is that posible? And Does the initial moles of HCl the problem (0,014) interact in something?

    posted on August 27, 2016
  12. geometry

    What is the answer to this example:The area of circle PQR with centre O is 72cmsquare.what is the area of sector POQ if POQ=40degree?(WAEC) question

    posted on May 15, 2016
  13. math

    The area of a circle PQR with centre O is 72cmsquare.What is the area of sector PQR,if angle PQR=40degree

    posted on May 15, 2016
  14. Medical physics

    A silver cube (density of silver is 10 g/cm3) with side length of 3 cm weighs more than an aluminium cube (density of aluminium is 2.96 g/cm3) with side length of 4 cm.The cubes are each suspended by a string and allowed to be completely immersed in two

    posted on May 3, 2016
  15. US History

    Spanish-American War. Sorry

    posted on February 2, 2016
  16. Chemistry


    posted on October 5, 2015
  17. trig


    posted on September 16, 2014
  18. math

    the answer was 3 that's correct thanks

    posted on November 21, 2012
  19. math

    i need your help pleaseeee

    posted on November 21, 2012
  20. math


    posted on November 15, 2012
  21. math

    i got it the answer 3 $ 50 thanks

    posted on November 15, 2012
  22. math

    for car is spend $138 for food $302 for miscellaneous it spend $ 460 for housing $498 for utility $90 for tax $362. question 1] was 4 [2] 5 [3] 9 [4] 5 [5] 50

    posted on November 15, 2012