Questions Asked on
March 30, 2008

  1. Chemistry

    solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution

    asked by Brenan
  2. Chemistry

    A solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution

    asked by Brenan
  3. physics

    A child looks at his reflection in a spherical tree ornament 12.0 cm in diameter, and sees an image of his face that us reduced by one-fourth. How far is his face from the ornament?

    asked by Anonymous
  4. Chem

    For the reaction, 3C2H2(g) ===> C6H6 at 25°C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K, Calculate the standard free energy change (in kJ) at 25°C. What is the formula that relates stand. entropy, enthalpy and

    asked by Ginger
  5. Chem

    The brown color associated with photochemical smog is due to NO2(g). This is involved with the following equilibrium in the atmosphere: 2 NO2(g) N2O4. Predict the signs of the enthalpy and entropy changes for this reaction. If the equation is at

    asked by Ginger
  6. Physics - Mirrors & Lenses

    When standing 1.25 m in front of an amusement park mirror, you notice that your image is three times taller. What is the radius of curvature of the mirror?

    asked by Anonymous
  7. Calculus

    For 0 < x < PI/2, if y = sin(x)^x, then dy/dx is.. I understand that you can take the natural logarithm of both sides and then take the derivative but why can't I simply take the derivative of it and get.. dy/dx = x(cos(x))(sin(x))^(x-1). Thanks in advance

    asked by Anonymous
  8. HCA 220

    What are the coronal plane and body directions

    asked by AXIA
  9. Chemistry

    Urea, NH2CONH2, is manufactured from ammonia and carbon dioxide according to the following equation: 2 NH3 (g) + CO2 (g) -> NH2CONH2(aq)+ H2O (l) What volume of ammonia gas at 25 o C and 1.5 atm is needed to make 500g of urea?

    asked by Brenan
  10. Philosophy

    1. Determine whether the following arguments are valid or invalid. If valid determine whether they are sound. Be sure to explain what validity is and how you determine whether an argument is valid or not. Explain your answers in as much detail as you can.

    asked by Justin
  11. calculus

    Find the second derivative of y=loge(logex) Show that y=loge(logex) is a solution of the equation xd^2y/dx^2 + x(dy/dx)^2 + dy/dx=o

    asked by daria
  12. Algebra I

    Profit equals revenue minus cost. P=R-C. Rewrite the formula to solve for C.

    asked by Patricia
  13. ACCOUNTING

    Part D - August Variance Analysis During September of the current year, the controller was asked to perform variance analyses for August. The January operating data provided the standard prices, rates, times, and quantities per case. There were 1,200 cases

    asked by Anonymous
  14. Math

    Two vectors 2a+b and a=3b are perpendicular. Find the angle between a and b, if |a| = 2|b|.

    asked by Anonymous
  15. Statistics

    What is a 95% confidence interval for mue, the population mean time the postal service employees have spent with the postal service? n=100 mean=7 S=2 years

    asked by Stephanie
  16. chemistry

    How will the following system at equilibrium shift in each of the following cases? 2 SO3(g) 2 SO2(g) + O2(g) H° = 197 kJ (a) SO2(g) is added (b) the pressure is decreased by increasing the volume of the container (c) the pressure is increased by adding

    asked by PHD Hopeful
  17. Math

    Given two non-collinear vectors a and b, show that a, axb, and (axb)xa are mutually perpendicular. Also Express the unit vectors i, j, and k as ordered triplets and show that i x j = k what are ordered triplets? Using components show that u x v = -v x u

    asked by Anonymous
  18. accounting

    Part D Note: This section is a continuation from Parts A, B, and C of the comprehensive problem. Be sure you have completed Parts A, B, and C before attempting Part D. You may have to refer back to data presented in Parts A, B, and C as well as use answers

    asked by Anonymous
  19. French

    How do you unscramble the French word lapcre?

    asked by Ernest
  20. English- Proofreading

    Please proofread this paper (without paragraphing... sorry) Thank you so much! Jane Goodall, the eminent woman known for changing the human perception of chimpanzees, is a renowned primatologist, speaker, and humanitarian. After her parents divorced,

    asked by Anonymous
  21. pre-calc

    A ship travels 200km west from port and then 240km due south before it is disabled. Illustrate this in a vector diagram. Usa trigonometry to find the course that a rescue ship must take from port in order to reach the disabled ship. i don't know where to

    asked by Devon
  22. college algerba

    Solve by the substitution method:

    asked by Sammy
  23. Legal

    Under the legal definition of Fructus Industrials is it true that "Minerals in the Soil" would not fall under this? It would in fact, fall under Fructus Naturales?

    asked by Wendy
  24. chem

    Nitrogen(75.5 kPa), oxygen (19.2 kPa), carbon dioxide(0.05 kPa) and water vapor(4.3 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa?

    asked by joe
  25. chem

    What volume will 1.216 g of SO2 occupy at 18 degrees celcius and 755 torr?

    asked by bob
  26. History

    "What position would you take on appeasement if you had been living in Canada during the 1930's and had heard about Adolf Hitler and the Nazis? Explain why" Hi, could you please help me by giving me some sort of direction on what i should do, i am not sure

    asked by Natalie
  27. Physics

    A lead ball, with an initial temperature of 25.0oC, is released from a height of 96.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it

    asked by Lindsay
  28. Algebra I

    Budget is 118,250.00. Write an algebraic expression that is 25% of budget for business space and utilities.

    asked by Patricia
  29. physics induced voltage

    A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 2.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the following when

    asked by Chris Adison
  30. physics

    a simple harmonic oscillator consists of a block of mass 2 kg attached to a spring of spring constant 100 N/m. when t=1 s, the position and velocity of the block are x=.129 m and v=3.415 m/s. A) what is the amplitude i figured that out and got sqrt(50) B)

    asked by Sarah
  31. chemistry

    When carbon dioxide is heated in a closed container, it decomposes into carbon monoxide and oxygen according to the following equilibrium equation: 2CO2(g) ---> 2CO(g) + O2(g) When 2.0 mol of CO2(g) is placed in a 5.0-L closed container andheated to a

    asked by Thomas
  32. math

    a paint supplier has two machines that prouce both indoor paint and outdoor paint. to meet its contractual obligations,the company must produce at least 60 gallons of indoor paint and 100 gallons of outdoor paint. machine 1 makes 3 gallons of indoor paint

    asked by wendy
  33. History

    Does anyone know any or know where I may find some quotes by General George Meade?

    asked by Britney
  34. algebra

    5x to the second+25x+30

    asked by Felton
  35. Math please help

    For the first question I really need all help I can get. Thanks! 1. Given a and b are unit vectors, a) if the angle between them is 60 degrees, calculate (6a+b) . (a-2b) b) if |a+b| = sqrt3, determine (2a-5b) . (b+3a) 2. The vectors a = 3i - 4j - k and b =

    asked by Anonymous
  36. Amber, Biology, DNA

    Amber, Biology First of all, as Christina said, "Post a New Question" because when you post under someone else's post we assume it's an answer to that first question! Here are some sites for you on DNA: 1. (definition): http://en.wikipedia.org/wiki/DNA 2.

    asked by SraJMcGin
  37. biology

    am writting about the evolution of our understanding of DNA as genetic material. suggest good website so that i can read more. thanks

    asked by amber
  38. Math - check

    Use the cross product to find a vector perpendicular to each of the following pairs. a) (4,0,0) and (0,0,4) I plugged in the cross product formula and got (0, -16, 0)

    asked by Anonymous
  39. chemistry

    Calculate the solubility of silver chloride in a 0.1 mol/L solution of sodium chloride at 25°C.? At SATP, Ksp AgCl(s) = 1.8 x 10^-10 What did I do wrong? AgCl Ag+ + Cl- [Ag+] = x [Cl-] = x + 0.1 Ksp = [Ag+] [Cl-] 1.8 x 10^-10 = (x) ( x + 0.1) x = molar

    asked by Marcus 2nd question
  40. Algebra II

    Simplify: x^5*x^pi Answer: x^8.14 Is this correct? I know that this is a repost of a question I posted yesterday, and I appreciate Damon looking at it, but I don't think I was clear in my typing of the question. Thanks.

    asked by Lucy
  41. computers

    the importance of computers in our lives

    asked by Anonymous
  42. Law

    I'm stumped... I've gone through my book three times now and can't find this information. Can someone please help me? First... Which of the following is true of a voidable contract? A: It's valid to only one party. B: It's good for only a short period of

    asked by Justie
  43. Philosophy

    How would you construct a proof to show that the following arguments are valid? 1. TvH 2. T→G 3. ~H ֶG 1. ~~A 2. ~A v C ֶC 1. S • T 2. (S • T) → G 3. G →(H v B) ֶ H v B 1. A →B 2. C →D 3. A v C 4. ~D ֶ B

    asked by Ann
  44. Math

    I have a few questions on my homework assignment. I've been sick and I have no idea what I'm doing. Question 1: Assume the hights of high school bball players are normally distributed. For the boys the mean is 74" with a standard deviation of 4.5" while

    asked by Amanda
  45. essay

    I´m an English teacher, I need a program that self correct essays from the students.Where can I find one?

    asked by Maria
  46. Math

    x^2+6x+27 m^2-m-12

    asked by joyce
  47. chemistry

    Please calculate the solubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP. This very question has been bugging me all weekend. Can some one please solve this quesiton it would really be appreciated.

    asked by Marcus
  48. Algebra

    A 3lb puppy is gaining weight at a rate of 3/4 lb per week. When will the puppy's weight exceed 22 1/2 pounds? I need help setting this up to solve.

    asked by Ami
  49. History Hellp Please

    Why is the Spanish Civil war a forgatable war ? What was it ? Who was in it ? What are right and left wing ?

    asked by AQA
  50. math

    The head of a round piston has a pressure of 210 psi pushing down on it. The piston is 3 inches in diameter. What is the force pushing the piston down?

    asked by walt
  51. math

    How much work does a 120 pound boy do in climbing to the top of the Washington Monument - a climb of 550 feet? If the climb in problem 2 takes 20 minutes, what is the average horsepower produced by the boy?

    asked by walt
  52. Pre Cal (logs)

    I need help with these logs 1: Log underscore4 16X 2: 2 Ln ( X(sqr. root)e 3:5^[2logUnderscore5(3x)] 4:log underscore2 ^[1280-logunderscore2 5) I don't understand how to do them thanks

    asked by Deb
  53. math

    A 3000 pound car is pushed 500 feet by three boys. A force of 60 pounds is required to move the car. How much work did the boys accomplish? How much work can each boy claim if he did his share?

    asked by walt
  54. science

    Hi. Can someone please explain to me the exact relationship between the greenhouse effect, global warming, and the ozone layer? I'm kind of confused because we had to write an essay on whether or not the greenhouse effect is controversial and everyone in

    asked by Liam
  55. chemistry

    Calculatet the solubility of silver chloride in a 0.10 mol/L solution of sodium chloride at 25 degrees celsius.At SATP, Ksp AgCl(s) = 1.8 x 10^-10

    asked by MiMi
  56. math

    the distance between north bay and sudbury is about 125km. If they are 10 cm apart on a road map, what is the map scale?

    asked by Cynthia
  57. HCA 220

    I need help with an assignment that is due today and I am totally lost. All I need is for someone to point me in the right direction. For example, The approach is body planes and directions; what is the approach and how might the approach be used. Thanks!

    asked by CD
  58. Physics..an electric field

    4 charged particles are at the cornedrs of a square of side a as shown. a) determine the magnitude and direction of the electric field at the location of charge q b) what is the total electric force exerted on q? basically picture is like this below It's a

    asked by ~christina~
  59. geometry

    how do you find the perimeter of a triangular pyramid

    asked by Jordan
  60. global warming

    hi im doing a debate tomorrow on global warming, i am arguing that it DOES exsit. the opposing side who don't believe in global warming want to say that increases in temperatures don't cause sea levels to rise, instead the tectonic plates of the earth

    asked by gabriella
  61. science

    I'm making a 3-d model of a plant cell what can i use to represent the cytoplasm? i'm in the 6 grade.

    asked by Montez
  62. science

    how do bacteria in the human intestine help maintain health?

    asked by Sonic
  63. social studies

    list 5 key issues that kepp the palestinians and israelis from making a lasting peace settlement

    asked by john
  64. math

    How do you find the LCM of 3 and 7?

    asked by Anonymous
  65. creating surveys

    how to create a survey

    asked by robert
  66. ACCT

    Part D - August Variance Analysis During September of the current year, the controller was asked to perform variance analyses for August. The January operating data provided the standard prices, rates, times, and quantities per case. There were 1,200 cases

    asked by Anonymous
  67. physics

    lenses that always diverge light rays that strike them is that convex or concave? I am not sure.

    asked by Anonymous
  68. Physics (check)

    True/False 3)The position-time graph of an object moving with a constant average velocity is always a straight line. True 4)A time interval is a scalar quantity. True

    asked by Jon
  69. Physics(check)

    7)A car is moving with a uniform speed of 15.0 m/s along a straight path. What is the distance covered by the car in 12.0 minutes? I don't know 8)What is the resultant of two displacement vectors having the same direction? The resultant is the sum of the

    asked by Jon
  70. science

    A 1-kg book is at rest on a desk. Determine the force the desk exerts on the book.

    asked by anysse
  71. Physics(check)

    9)You are taking a road trip to the beach for Spring Break. You leave at 12:00pm. At 12:10 you stop for lunch 10 miles down the road. You get back on the road and travel 75 more miles and realize that you need to stop for gas. You notice that it is now

    asked by Jon
  72. Physics(check)

    11)A race car travels on a racetrack at 38 m/s and slows at a constant rate to a velocity of 20 m/s over 10 s. How far does it move during this time? I don't know 12)The speed of a body is the distance traveled per unit time. Which of the following would

    asked by Jon
  73. Physics(check)

    13)What can you say about the motion of a body if its velocity-time graph is a straight line inclined with the time axis? The body moves with uniform velocity. 14)Which of the following conclusions can be drawn if a velocity-time graph is parallel to the

    asked by Jon
  74. Physics(check)

    17)Under what conditions can an object travel a certain distance and yet its resultant displacement be zero? When the final position is the same as the initial position.

    asked by Jon
  75. Algebra II

    1) A red die and a blue die are tossed. What is the probability that the red die shows a 3 and the blue die shows a number greater than 3? Answer: 3/5 2) Tickets are numbered 1 to 50 and placed in a box. Three tickets are drawn at random without

    asked by Lucy
  76. math

    How do I know when a residual plot is the right one? I'm graphing the residuals for my information, but none of them seem to be close to zero? Does that mean that a better equation can be used?

    asked by Anonymous
  77. accounting

    Part D - August Variance Analysis During September of the current year, the controller was asked to perform variance analyses for August. The January operating data provided the standard prices, rates, times, and quantities per case. There were 1,200 cases

    asked by Anonymous
  78. college algerba

    Solve by the substitution method: 2x - 3y = 7 y = 3x - 7

    asked by Sammy
  79. macroeconomics

    One of the early economic “laws” was called Say’s Law that stated that—supply creates its own demand. Using the circular flow chart, explain what this means and how an expanding population results in economic growth.

    asked by samatha
  80. Music

    So, the first movement of Mozart's 21st piano concerto (K. 467) is in sonata allegro form...which means there are two "themes" that are developed within the piece. I can pick out the first one--it's developed right in the first 20 seconds. But I can't

    asked by Seymour
  81. Algebra II

    Two cards are drawn from a standard deck of cards. Find the probability that a king or a red card is drawn. Work: 4/52 + 26/52=30/52 or 15/26 Is this correct? Thanks

    asked by Lucy
  82. Probability

    Mary had 6 pennies and 4 nickels. If she took three coins, what is the probability that all the coins were pennies? I think it's 18/24.

    asked by Ktowns
  83. chem

    Calcualate the volume of 0.300mol of gas at 60 degrees C and 0.821atm.

    asked by bill
  84. english

    I need a summary on ch.13,14,15 on "Death on the Ice." by Cassie Brown I would really appreciate your help.

    asked by Spencer
  85. English expression

    1. He has gray hair. 2. He has white hair. Can we use #2? Which one is right?

    asked by John
  86. English

    I have to write an outline for a research paper with the cons of performance enhancing drugs in sports. I have a lot of research, but I do not know how to organize it all into a 5 category outline (I. - V.) with examples and explanations for each. Any help

    asked by J P
  87. health care

    what are some examples of activities one can participate in after i have received my bachelors degree that coincides with this philosophy of continuing education in health care

    asked by jean
  88. geometry

    The measures of six angles in a convex heptagon are 120 degrees, 88 deg., 91deg, 164deg.,173deg.,and 99deg. Find the measure of the remaining angle.

    asked by bill
  89. Chem

    For a process to be at equilibrium, it is necessary that a)DSsys = DSsurr b)DSsys = -DSsurr c)DSsys = 0 d)DSsys = 0 and DSsurr = 0

    asked by Ginger
  90. Chem

    What equation can I use to solve this kind of problem? A metal undergoes electrolytic reduction according to ne- + Mn+ ===> M. What current (in Ampères) must be provided to deposit the metal at a rate of 1.914 mol/hr if n = 3?

    asked by Ginger
  91. social studies

    what is zapatistas???

    asked by Nicole
  92. Chem

    How many minutes will it take a current of 66.049 Ampères to deposit 86.825 grams of aluminum (26.981538 g/mol)? Al has a charge of 3, so n=3. MM=26.981538g/mol 1eq=molarmass/charge so 26.981538/3=8.9938 1eq=8.9938 1F=96485c/eq F=13138.29477 Am I on the

    asked by Ginger
  93. Chem

    Whis is the relationship between DG and DGf° for the reaction MgF2(s) ===> Mg2+(aq) + 2 F-(aq) Is it: DG = {DGf°[Mg2+(aq)] + 2 DGf°[F-(aq)] - DGf°[MgF2(s)]} + RT ln([Mg2+][F-]2) or DG = {DGf°[Mg2+(aq)] + 2 DGf°[F-(aq)] + RT ln([Mg2+][F-]2) or am I

    asked by Ginger
  94. math

    1. solve by using the quadratic formula. 5x^2+x=3 2. solve by completing the square. x^2=5x+2 3.solve by using the square roots method. 5(x-2)^2=3

    asked by mary
  95. math

    186 is 60% of what number? (how do I find this out)

    asked by calie
  96. Physics

    How do you write 600nm in scientific notation?

    asked by Bill
  97. Physics

    What is the color of all the visible light frequencies mixed together equally? I would think white. Is that right?

    asked by Tara
  98. chem

    a 4 L sample of gas at 30 degrees celcius and 1 atm is changed to 0 degrees celcius and 145,000Pa. what is its new volume?

    asked by bill
  99. Math (functions)

    How can I tell whether a function will be reflected in the x-axis or y-axis and whether it will be horizontally and vertically compressed or not? For example, this function: y=-2f(4(x-2)) + 8

    asked by Lucy
  100. social studies

    What did George Washington accomplish in office?

    asked by mia
  101. Probability

    Erin's CD changer holds 6 compact disks. Justin uses the random function on to play all the songs randomly. If each of the disks on the changer holds 10 songs, what is the probability has favorite song will be first? If I am getting the hang of this, it's

    asked by Ktowns
  102. Social Studies for Ryan

    http://www.google.com/search?q=immigration+in+1840-1920&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA Lots of information in here. =)

    asked by Writeacher
  103. physics induced voltage

    I was given an equation by bobpursey but I don't know what it means. Considerable scientific work is currently underway to determine whether weak oscillating magnetic fields such as those found near outdoor power lines can affect human health. One study

    asked by Chris Adison
  104. Math and rubric

    How can students be involved in understanding and using rubrics to help with their learning mathematic concepts or skills? I am sorry for not being mor specific ...

    asked by Sarah
  105. math

    Graph the quadratic equation after completing the given table of values. y = x^2 – 2x?

    asked by mary
  106. Pre Cal

    How Much must be invested now, at 3.75% interest, compounded monthly to have $37,500 in 22 years? thanks

    asked by Deb
  107. Heath - Debate

    I need help to fill up my debate points. Debate - Young people should not be able to have sex before marriage. TeamVeiw - Against. So we disagree and think that they should be able to. Do you think people should be able to have sex before marriage? Why?

    asked by 8D
  108. Chemistry

    I don't understand how to work out the volumes of weak acid and strong base to mix to make 1L of buffer when given the concentrations of weak acid and strong base (in my case 0.160M NaOH and 0.200M H3PO4) and the pH required (7.00). Specifically the

    asked by Sarah
  109. Chemistry

    I don't understand how to work out the volumes of weak acid and strong base to mix to make 1L of buffer when given the concentrations of weak acid and strong base (in my case 0.160M NaOH and 0.200M H3PO4) and the pH required (7.00). Specifically the

    asked by Sarah
  110. physics

    A convex spherical mirror of focal length 15.0 cm is to form an image 9.00 cm from the mirror. Where will the object be placed?

    asked by Anonymous
  111. physics

    A man standing 1.25 m in front of a shaving mirror produces an inverted image 25.0 cm in front of it. How close to the mirror should he stand if he wants to form an upright image of his chin that is twice the actual size of his chin?

    asked by Anonymous
  112. calculus

    find the derivative of the function y=x^x Hence fin the coordinates of the turning point of the funcion y-x^x. Give the values correct to two decimal places

    asked by daria
  113. calculus

    Differentiate e^(2x^3+x) X tan(x^2) tan e^x / ln(x^6/2-3x+3e) cos(tan(e^4x^2))

    asked by daria
  114. english - revision

    My instructor suggested that I simplify the essay, so I can easily get my point across. Meanwhile, the feedback received from my peer reviewer was valid and will help me better my expository essay. The things that I will put in practice are the following:

    asked by rose
  115. Physics

    1. A ball is projected horizontally from the edge of a table that is 4.0 meters high, and strikes the floor at a point 3.0 meters from a point on the floor directly below the edge of the table. The initial velocity of the ball as it is projected from the

    asked by Sandhya
  116. Sose

    I am researching fire ants for an assignment and need a map of where they were first introduced in Australia and where they have now spread in Australia. I have searched everything imaginable on google and found nothing. Can you please help me?

    asked by Melody
  117. Rubric and mathematics

    How can students be involved in understanding and using rubrics to help with their learning mathematic concepts or skills?

    asked by Sarah
  118. History

    Could you say the cold war was like walking on thin ice...they were close to "breaking" through to war? How could I make a good phrase like this? thx

    asked by MW
  119. Calculus

    Can someone solve this integral for me? My calculator just gives me a decimal approximation but I need an exact number. Thanks! :) pi[{3ln(3)^2 - 6ln (3) + 6} - {ln(1)^2 - 2 ln(1) + 2}]

    asked by Lin
  120. physics induced voltage

    A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 2.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the following when

    asked by Chris Adison
  121. english

    i really need help and almost every website can't help me saying what hopperty means i here own word what can i do

    asked by cindy
  122. algebra

    x to the second +5X-25

    asked by Felton
  123. maths

    Jerry monthly salary consist of $850 pluss commission of 15 % on the total sales made.If his total sales for the month of March is $ 25 000 ,what is his income for the month of March?

    asked by MTH
  124. history

    was the gang of four the same as the group of jiang

    asked by leena
  125. Physics... Coulomb's law

    Two small silver spheres with a mass of 10.0g, are separated by 1.00m. Calcuate the fraction of the electrons in one sphere that must be transfered to the other to produce an attractive force of 1.00x10^4 N (about 1 ton) between spheres (number of

    asked by ~christina~