Popular questions and responses by tanya
  1. Physics Help Please --- Urgent

    A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed? A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm

    asked on May 2, 2015
  2. chemistry

    In a zero order reaction ,20% of the reaction complete in 10s .How much time it will take to complete 50% of the reaction?

    asked on May 27, 2015
  3. history

    the reign of terror was a necessary evil discuss

    asked on June 22, 2015
  4. Maths

    Draw a graph for this equation y=5x+3

    asked on August 7, 2020
  5. chemistry

    A|A+3(0.1)||B+2(0.01m)|B GIVEN E°A|A+3=0.75v E°B|B+2=0.45v

    asked on May 27, 2015
  6. calculus help

    Evaluate!!!! integral -10 to 10 ((2e^x)/(sinhx+coshx))dx Thanks!

    asked on May 8, 2014
  7. Chemistry

    0.24g of a volatile substance,upon vaporisation,gives 45ml vapour at NTP what will be the vapour density of the substance?

    asked on March 22, 2015

    A gaseous mixture was prepared by taking equal mole of CO and N2 .if the total pressure of the mixture was found 1 atmosphere ,the partial pressure of nitrogen (N2) in the mixture is.

    asked on March 22, 2015
  9. Physics Help Please --- Telescope

    An astronomical refracting telescope is made from two lenses. the objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17 cm. a) What is the total length of the telescope? b) What is the angular magnification of the

    asked on May 2, 2015
  10. Calculus

    a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ???? Then improve your estimate by using six rectangles. R6= ????? Sketch the curve and the approximating rectangles for R3. Sketch the

    asked on April 23, 2014


    asked on April 10, 2014
  12. Physics

    Which of the following is the correct relationship between the electric field strength and the potential difference?

    asked on May 31, 2013
  13. psychology

    Such tests as the Rorschach Inkblot Test and the Thematic Apperception Test are examples of what? projective measures self-report measures objective measures observational measures

    asked on December 21, 2009
  14. Chemistry

    Hydrazene can be used in fuel cell N2H4(aq)+o2(g)->N2(g)+2H2O(l) IfΔG°for this reaction is -600kj what will be the E°for the cell?

    asked on May 27, 2015

    At 25°C and 730 mm pressure,380 ml of dry oxygen was collected.If the temperature is constant ,what volume will the oxygen occupy at 760 mm pressure ? ANSWER- 365ml

    asked on March 22, 2015
  16. statistics

    The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years what percentage of individual aircraft have ages greater than 15 years assume that a random sample of 49 aircraft is selected and the

    asked on April 24, 2012
  17. Calculus Help Please!!!

    In a murder investigation, the temperature of the corpse was 32.5 C at 1:30pm and 30.3 C an hour later. Normal body temperature is 37.0 C and the temperature of the surrounding was 20.0 C. When did the murder take place? PLEASE SHOW STEP BY STEP

    asked on March 27, 2014
  18. High Point

    a sign is in the shape of rhombus with a 60 degree angle and sides of 9cm long. Find its are to nearest tenth?

    asked on January 24, 2012
  19. statistic

    Quiz has 6 questions. Each question has five possible answers, only one of each 5 answers is correct. If student randomly guesses on all six questions, what is the probability to answer 2 questions right? Tip: first, you have to define parameters of

    asked on December 4, 2010
  20. statistics help...please

    i have no idea! The real estate assessor for a country government wants to study various characteristics of single family houses in the country. A random sample of 70 houses reveals the following: the mean is 1759, standard deviation is 380 and 42 houses

    asked on April 3, 2008
  21. math

    the distance between new york city and boston is 189.9 miles as the crow flies. how far is it in kilometers? 117.7 kilometers 305.7 kilometers 417.8 kilometers 1,899 kilometers

    asked on November 7, 2015
  22. Chemistry

    the rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30 ml/s.the rate of diffusion of hydrogen gas will be

    asked on April 2, 2015
  23. verbal linear equations

    a taxi costs $2.75 for the first quarter of a mile and $0.85 for each subsequent quarter mile.A ride that cost $23.15 is how many miles longer than a ride that costs $17.20?(please i don't want example show me how u work it out )

    asked on February 5, 2012
  24. Finance

    a corporation had year end 2004 and 2005 retained earnings balances of $320,000 and $400,000, respectively. The firm reported net profits after taxes of $100,000 in 2005. the firm paid dividends in 2005 ofwhat

    asked on August 11, 2011
  25. Math

    A Garden has a many trees in each row as there are rows in the garden if the total number of trees in the garden is 2500 find the number of rows of tree

    asked on July 11, 2019
  26. chemistry

    CHEMICAL KINETICS The rate of reaction 2N₂O5->4NO₂+O₂ can be written in three ways -d[N₂O5]/dt= k[N₂O5] d[NO₂]/dt= k'[N₂O5] d[O₂]/dt =k"[N₂O5] The relationship between k and k' and between k and k" are ?

    asked on May 28, 2015

    Two gases A and B having the same volume diffuse through a porous in 20 and 10 seconds respectively .The molecular mass of A is 49u.Molecular mass of B will be

    asked on March 23, 2015
  28. math

    A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest

    asked on March 19, 2014
  29. Algebra

    Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]

    asked on May 1, 2013
  30. Algebra

    Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)

    asked on May 1, 2013
  31. chemistry

    how much heat is required to vaporize 343g of liquid ethanol at its boiling point?

    asked on March 25, 2013
  32. Chemistry

    Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following. (a) the initial solution (b) the point at which 80 mL of the base has been added (c) the equivalence point (d) the point at which 105

    asked on March 17, 2012
  33. help in math

    solve and check each of the following quadratic equation (1) x^2=6x (2) x^2=3x (3)x^2=17x (4) x^2=5x+6 (5) x^2+9x=10

    asked on February 15, 2012
  34. physics

    a cylinder of diameter 1cm at 30degree celcius is to slid into a hole on a steel plate. the hole has a diameter of 0.9997 cm at 30 degree celcius. to what temperature must be the plate be heated when steel has the alpha 1.1X10^-5/degree celcius

    asked on September 2, 2011
  35. bus475

    One characteristic of an oligopoly market structure is:

    asked on November 13, 2010
  36. chemistry

    2NH3+H2SO4---> (NH4)2SO4 Calculate the mass of ammonia required to produce 125g of ammonium sulfate.|:

    asked on March 31, 2010
  37. Biology

    Produce a nucleotide sequence with a single base-pair substitution mutation that still produces the same amino acid sequence. Indicate the site of the mutation and explain why the amino acid sequence is not affected.

    asked on March 15, 2009
  38. Maths

    A survey conducted with 30 students revealed that:20 has cell phone 16 has tsblets 4 has neither 2x has both...calculate the value of x

    asked on December 6, 2016
  39. Math

    An alloy is made up of 25% copper, 30% iron an rest being zinc. Find the mass of zinc in 720 gm of the alloy

    asked on December 3, 2016
  40. statistics

    In a recent​ season, the population standard deviation of the yards per carry for all running backs was 1.241.24. The yards per carry of 25 randomly selected running backs are shown below. Assume the yards per carry are normally distributed. 1.81.8

    asked on November 22, 2015
  41. afrikaans (AFK503/101)

    Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya

    asked on August 12, 2015

    The pressure exerted by 6.0g of methane gas in a 0.03m3 vessel at 129degreeC is.

    asked on March 22, 2015
  43. Calculus Help Please!!!

    Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x Y1= I

    asked on April 4, 2014
  44. Medical Billing and Coding

    Had to develop a paragraph using clear, varied sentences containing concrete words and transitions or connectives to create a logical flow. Need assistance in the following paragraph that describes on particular experience I had that inspired you or guided

    asked on December 10, 2013
  45. Math


    asked on November 10, 2013
  46. ,math

    show that sec theta(cosec theta) - cot theta = tan theta

    asked on May 3, 2013
  47. Algebra

    Solve for x. Round to the nearest hundredth. ln x = − 4/9 x =

    asked on May 3, 2013
  48. science

    In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant

    asked on March 10, 2013
  49. physics

    A box of books weighing 324 N is shoved across the floor by a force of 527 N exerted downward at an angle of 35 below the hori- zontal. The acceleration of gravity is 9.81 m/s2 . If μk between the box and the floor is 0.59, how long does it take to move

    asked on October 15, 2012
  50. physics

    In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps. A grocery cart has a mass of 30kg. The coefficient of friction is .10. Assume that the shoppers

    asked on September 11, 2012
  51. statistics

    Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both

    asked on June 28, 2012
  52. solving algebraic equation

    a movie theater charges $9 for an adults ticket and $5.00 for a child ticket. on a recent night the sale of child's tickets was two times the sale of an adults tickets. if the total amount collected for ticket sales was not more than $3800 what is the

    asked on February 8, 2012
  53. algebraic equation and inaqualities

    in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X

    asked on February 6, 2012
  54. algebra verbal linear equation

    Allison has a square root flower garden and Lauren has a rectangular flower garden the width of the rectangular garden is 2 yards less than a side of the squaare garden and the length of the rectangular garden is 5 yards more than a side of the square

    asked on February 5, 2012
  55. English

    Describe the role that Huck’s conscience plays in the first half of Twain’s novel.

    asked on October 25, 2011
  56. english

    How does the issue of slavery become a concern in Huck's life? How does Huck deal with this controversial issue?

    asked on October 25, 2011
  57. english

    How does Huck display imagination, intelligence, creativity, and a sense of humor in the first half of Twain’s novel?

    asked on October 25, 2011
  58. English

    Identify and describe Huck’s opinions of “sivilization,” education, and religion.

    asked on October 25, 2011
  59. soc 110

    a. In urban areas across our country, identify at least three technologies that Americans have become dependent upon in their daily lives. b. Using the technologies that you described in (a), discuss at least one advantage and one disadvantage that people

    asked on April 15, 2011
  60. Finance

    What is a significant disadvantage of the payback period? a. does not properly consider the time value of money, b. Is complicated to explain, c. Increase firm risk, or d.Provides a measure if liquidity.

    asked on March 24, 2011
  61. math

    Given the expression (3s-4)(4s+5), explain in words the steps taken to completely simplify the expression

    asked on January 16, 2011
  62. statistics - math

    Sixty percent of the students at a particular community college are female. If 13 students at that community college are selected at random, find the probability that 5 or 6 students will be female. Use Appendix Table or Excel function for Binomial

    asked on December 4, 2010
  63. Popular American Culture

    Prepare a 350 to 700-word paper in which you examine trends in popular American culture. In your examination, be sure to describe at least one trend from the following areas: a. Social b. Political c. Personal d. Religious

    asked on August 7, 2010
  64. Algebra

    Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles

    asked on March 20, 2010
  65. Math

    Find an equation of the line that passes through the given point and has the given slope Express ur answer in slope-intercept form. (8,0), m=-3

    asked on February 18, 2010
  66. psychology

    The observational learning approach states that stereotypes and prejudices are acquired through what? repressing of wants and needs excessively experiencing maturation of innate ideas watching and imitating a model’s behavior pairing conditioned and

    asked on December 20, 2009
  67. physics

    a sled slides down a frictionless hill. if the sled starts from rest at the top, its speed is 7.5 m/s. a.) on a second run , the sled starts with a speed of 1.5 m/s at the top.. will it end with less than 9 m/s, 9 m/s, or more than 9 m/s b.) find the speed

    asked on December 2, 2009
  68. Algebra

    Use the formula h= -16t^2+250t to model the height 'h' in feet of a model rocket 't' seconds after it has luanched. Determine when the rocket will reach a height of 900 feet.

    asked on April 15, 2008
  69. Stat help

    An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min.

    asked on April 3, 2008
  70. Statistics...help

    An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min.

    asked on April 3, 2008
  71. religious studies

    Who was Jesus'most beloved desciple?

    asked on February 15, 2008
  72. Math

    5ml is how many liters

    asked on December 26, 2019
  73. verbs

    A Superblade was used at the 2 o'clock position, and the anterior chamber was entered find the verbs

    asked on December 18, 2019
  74. Math

    A man spend one third of his wages on food and one fifth on rent. A. What fraction does he spend on food and rent together? B. What fraction of his wages is left to spend on other things? C. If in a month the same man spend $450 on food, what is his

    asked on June 10, 2019
  75. Trig

    Tan theta / 1- tan theta -cot theta /1-cot theta =cos theta + sin theta/cos theta -sin theta

    asked on March 29, 2018
  76. History

    Critically access Robespierre's contributions to the revolution

    asked on April 25, 2017
  77. Math

    a rectangle of board measures 21 m by 70 cm. Circular plates are to be cut from the board of diameter 14 cm. how many plates and board is left

    asked on January 16, 2017
  78. Math

    Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Fknd her aggregate marks.

    asked on December 3, 2016
  79. Math

    A man takes commission at the rate of 2% on first 50,000, 7% on next 50,000 and 0.5% on remaining price. Find bis commission on the car that has been silf for 2,38,000.

    asked on December 3, 2016
  80. Math

    Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Find her aggregate marks.

    asked on December 3, 2016
  81. math

    A person that is 1.6 m tall casts a 4 m shadow. At the same time, a nearby tree casts a 12 m shadow. What is the height of the tree to the nearest tenth of a metre?

    asked on November 4, 2016
  82. Science

    water is flowing through a horizontal pipe of varying cross section at any two places the diameters of the tube are 4cm and 2cm if the pressure difference between these two places be equal to 4.5cm then determine the rate of flow of water in the tube

    asked on September 10, 2016
  83. financial management

    Barclays bank has agreed to give Dumisani a loan of $250 000 on the following conditions: a) 16% interest rate compounded monthly b) Dumisani will have to pay back 12 equal installments each at the end of each quarter. Determine the value of each

    asked on May 18, 2016
  84. Msth


    asked on May 9, 2016
  85. Math

    2(3c to the 2nd power+ c +-2 Please check 6c to the 4th power+c squared + -4

    asked on May 8, 2016
  86. Math

    Please check Simplify 7t+3+t+9=8t+12 Simplify m-2-4m-5=-3m+7 Solve 90=5t+t 90=6t t=15

    asked on May 8, 2016

    Greek educators, religious reformers,scientist of intellectual revolution, political philosophers constructed the door through when the pilgrims entered the new world when they arrived. [Critically analyze] who are the Greek educators? who are the

    asked on March 7, 2016
  88. statistics (math)

    of college students 45% are women 8% have a GED. suppose a student is selected at random. Given that the selected employees is a woman. what is the probability that she has a GED

    asked on November 28, 2015
  89. Statistic math

    student is graduating from their university and has applied to jobs at company A and B. The student thinks they have a 40 % chance of a receiving an offer from company A and a 50 % chance of receiving an offer from company B. If the student receives an

    asked on November 28, 2015
  90. Algebra 2

    The lenths of the side of a triangle are x+4 units, x units, and x+1 units. Express the perimeter of the triangle as a polynomial in standard form.

    asked on November 12, 2015
  91. chemistry

    name three characteristics of nonmetals

    asked on November 7, 2015
  92. math

    charlene takes the bus to work in the morning, then walks home for lunch, walks back to work, and finally walks home in the evening. The distance one way is 600 meters. How far does she walk each day between home and work? 1.2 kilometers 1.8 kilometers 180

    asked on November 7, 2015
  93. math

    how do you convert miles to feet in the u.s. customary sysyem? multiply by 12 divide by 12 multiply by 5,280 divide by 5,280

    asked on November 7, 2015
  94. Math

    Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?

    asked on October 8, 2015
  95. Math

    Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?

    asked on October 8, 2015
  96. math problems

    shelia works at Bills Bargin. She earns $350 per week plus 10% of all sales. What is her commission for the week, if she sold $2490 worth of goods?

    asked on August 2, 2015
  97. chemistry

    The edge length of face centered unit cubic cell is 508pm.if the radius of the cation is 110 pm,the radius of anion is

    asked on July 7, 2015
  98. MATH

    0.4771=x/2.303*8.14[50/323*373 calc.-x?

    asked on May 28, 2015
  99. maths

    0.4771=x/2.303*8.14[50/323*373 calc.-x?

    asked on May 28, 2015
  100. PHYSICS

    An object of mass M is divided into two parts ,which are placed at distance d.if gravitational force of attraction is maximum between parts,then find the ratio of mass of both parts

    asked on April 3, 2015


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