1. chemistry (DrBob222)

    Calculate the value of Ecell for the reaction of cobalt(II) chloride and zinc metal, given the specific concentrations listed. Zn(s) | Zn2+(0.21 M) || Co2+ (0.21 M) | Co(s) Okay, so I keep getting -1.04 and -1.06 when I do this problem. I have used log

    asked by Anonymous on November 21, 2011
  2. chemistry (DrBob222)

    Calculate the value of Ecell for the reaction of cobalt(II) chloride and zinc metal, given the specific concentrations listed. Zn(s) | Zn2+(0.21 M) || Co2+ (0.21 M) | Co(s) Okay, so I keep getting -1.04 and -1.06 when I do this problem. I have used log

    asked by Anonymous on November 21, 2011
  3. English

    I urgently need you to see if the sentence is OK now. Thank you!! 1) Moreover, this particular bacterium can survive in presence of arsenic and, therefore, won't die until its action of purification is completed. 2) This method is inexpensive and

    asked by Henry2 on February 15, 2012
  4. history

    what is socratic method? i heared a lot of different stuff!! IDEAS PLZ Thank you for using the Jiskha Homework Help Forum. This is "thinking critically" and that can be done by using guided questions. Here is a good definition:

    asked by david on March 1, 2007
  5. physics

    A pendulum has a mass of 3-kg, a length of 2.2 meter, and swings through a (half) arc of 30 degrees. To the tenth of a Joule, what is its maximum Kinetic Energy? I just need a very simple, straightforward method of solving this problem. Unfortunately my

    asked by Skyler on August 14, 2010
  6. using skills

    Assignment 33 discusses a natural way to reinforce science process skills and introduces the scientific method. This strategy, especially appropriate for primary grades, is to have children do which of the following? A. Begin a collection B. Manipulate

    asked by lauren on March 5, 2015
  7. Math

    Maximize P= 8x1+12x2 Subject to 2x1+4x2

    asked by SHelley on May 7, 2013
  8. Stats

    if a researcher were studying the effects of a teaching method on patient learning outcomes, how must he or she word the research question (different from hypothesis) to use the t-test for statistical differences? What type of data must he or she collect

    asked by Rachel on March 5, 2011
  9. Chemistry

    24.5 g of H2SO4 (98 g/mol) is added with h20 to make up to 800 ml of a solution. If 50 ml of the H2SO4 is added with 100 ml of H20, what will be the molarity of the diluted solution? MaVa=MbVb (0.3125)(50)=(Mb)(100) Mb= 0.16 M No huh?

    asked by Joey on October 9, 2016
  10. math

    An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

    asked by emily on April 23, 2013
  11. Gen. Chem

    To make a solution with a pH = 4.40 a student used the following procedure : a certain amount of sodium acetate along with 0.280 moles of acetic acid is added to enough water to make a solution of 1.00 L How many grams of sodium acetate were added ? Ka =

    asked by Rinzin on March 22, 2010
  12. chemistry

    The density of acetonitrile (CH3CN)is 0.786 g/mL, and the density of methanol (CH3OH)is 0.791 g/mL. A solution is made by dissolving 24.5mL (CH3OH)in 98.9mL (CH3CN). What is the mole fraction of methanol in the solution?

    asked by Anonymous on September 11, 2012
  13. chemistry

    2) Suppose you have 5.00g of powdered magnesium metal, 1.00L of 2.00M potassium nitrate solution, and 1.00L of a 2.00M silver nitrate solution. a. Which one of the solutions will react with the magnesium powder?

    asked by Anonymous on March 17, 2013
  14. Chemistry

    How does dissolving a solute affect the boiling point or freezing point of the solution? What about the solution's vapor pressure? Read about Raoult's Law, freezing point depression and boiling point elevation.

    asked by John on March 6, 2007
  15. chemisty

    A nitric acid solution is neutralized using sodium hydroxide. How many grams of sodium hydroxide are needed to neutralize 5.50 L of 1.200 M nitric acid solution? HNO3 (aq) + NaOH (aq) → H2O (l) + NaNO3 (aq)

    asked by silent on December 1, 2010
  16. math

    An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

    asked by emily on April 23, 2013
  17. math

    How much pure anti freeze must be added to 10 gal of 10% antifreeze solution to increase its concentration to 60 % anti freeze? If X represents the number of pure antifreeze solution, what is the correct statement of the problem?

    asked by EDDY on September 4, 2017
  18. Chemistry

    100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M Who help me thanks a lot

    asked by Mohit on April 26, 2016
  19. chemistry

    In the following experiment, a coffee-cup calorimeter containing 100mL of H2 is used. The initial temperature of the calorimeter is 23.0 C . If 3.40g CaCl2 of is added to the calorimeter, what will be the final temperature of the solution in the

    asked by Yuli on November 24, 2011
  20. algebra help please

    Mixture Problem... An auto tech needs a radiator to have a 40% antifreeze solution. The radiator currently is filled with 4 gallons of a 25% antifreeze solution. How much of the antifreeze mixture should be drained from the car if the mechanic replaces it

    asked by kay on February 27, 2012
  21. Chemistry

    When 25.3 mL of 0.100 M NaOH was reacted with 18.8 mL of H2SO4 of unknown molarity, the final solution was 0.029207 M in H2SO4. What is the molarity of the original H2SO4 solution? The equation for the reaction is: 2 NaOH + H2SO4 → Na2SO4 + 2 H2O

    asked by Haley on May 20, 2017
  22. Answer Check Please

    Andy and William work together to build a toy house. It will take William 5 hours and Andy 4 hours, or William 10 hours and Andy 2 hours to finish their work. If William works alone, how many hours will it take to finish his work? I say 15 is the answer.

    asked by William on September 30, 2010
  23. math

    Algebra 1.) Use the distributive Property to simplify the expression . (-1)(4 - c) A. 4 - c B. -4 + c C. 4 + c D.-4 - c 2.)Use the distributive Property to simplify the expression 4(2x - 4) A.8x + 4 B.8x - 4 C.8x - 16 D.4x - 16 3.) Use the distributive

    asked by dfhsh on September 13, 2018
  24. Literacy

    The trend toward two-family income has led to A. policies allowing only one family member to work for a company. B. flexible work schedules, pregnancy benefits, and elder-care programs. C. businesses paying lower wages and hiring fewer workers. D. fewer

    asked by Heather on January 21, 2012
  25. Reading

    Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you

    asked by Cait on January 6, 2016
  26. scientist

    Mr.Becks gigantic gas- guzzling exhaust spewing urban assault vehicle suburban weighs 10000 pounds it takes Mr Beck 2 minutes to drive 1.5 kilometers to west valley fitness so he can ride the stationary exercise bike for a half hour How much work and power

    asked by Barb on October 25, 2009
  27. Creative Writing

    Hi, I have to write an essay on this topic. Describe a person (even yourself) at a time of great emotion; for example, joy, anger, grief, etc. I want to write about the day when my baby sister was born. I haven't done any work yet. i want to do some

    asked by y912f on October 11, 2009
  28. Literacy

    The trend toward two-family income has led to A. policies allowing only one family member to work for a company. B. flexible work schedules, pregnancy benefits, and elder-care programs. C. businesses paying lower wages and hiring fewer workers. D. fewer

    asked by Heather on January 23, 2012
  29. Algebra 2

    A company charges 16$ for a subscription. It has 30,000 subscribers. It looses 1,000 subscribers for every 1$ they raise the price. 1.Find the quadratic quation. (Can you tell me how to pull the numbers out of the question and put it into the equation?)

    asked by Anon on February 24, 2011
  30. calculus

    find max, min and saddle points of the give function f(x,y)=sin(x)+sin(y)+sin(x+y) 0

    asked by Help Please on March 9, 2012
  31. Pre-calculus help

    I have two problems I am stuck on, if you could show me how to solve the problems it would be much appreciated. 1) Find sin 2x, cos 2x, and tan 2x from the given information. tan x = − 1/6, cos x > 0 sin 2x = cos 2x = tan 2x = 2) Find sin 2x, cos 2x, and

    asked by Holly on April 10, 2015
  32. algebra PLEASE HELP ASAP

    Please show me all the steps to solving the problem also you can use comment field to explain the work QUESTION: a box contains 95 pink rubber bands and 90 brown rubber bands. you select a rubber band at random from the box. find each probability. write

    asked by Anon on May 3, 2016
  33. PLEASE HELP WITH ALGEBRA

    Please show me all the steps to solving the problem also you can use comment field to explain the work QUESTION: a box contains 95 pink rubber bands and 90 brown rubber bands. you select a rubber band at random from the box. find each probability. write

    asked by Anon on May 3, 2016
  34. Math

    On the reality TV show Last Man Standing, a package is thrown from a plane to the ocean below. The contestants must swim to the package to receive the "free pass" located inside the package. The path that the package follows can be modelled by the

    asked by Heaven on May 16, 2016
  35. Physics

    A 1260-kg car starts from rest at the bottom of a drive way and has a speed of 3.00 m/s at a point where the drive way has risen a vertical height of 0.600 m. Friction and the drive force produced by the engine are the only two nonconservative forces

    asked by Cheech on October 3, 2013
  36. Physics

    A man uses a pulley arrangement to lift a heavy crate.He applies a force that is one-fourth the weight of the crate, but moves the rope a distance four times the height that the create is lifted. Is the work done by the man greater than, equal to, or less

    asked by Adriana on November 14, 2010
  37. Physics

    A roller coaster (491 kg) moves from A (1.09 m above the ground) to B (26.3 m above the ground). Two non-conservative forces are present: friction does -2.39 x 104 J of work on the car, and a chain mechanism does +5.18 x 104 J of work to help the car up a

    asked by Candy on February 29, 2012
  38. Algebra 1

    A part time job pays $465.55 a week and a fixed hourly rate for any extra hours of work. For 2 weeks Emily works 4 extra hours per week and earns a total of $1211.10. What is the amount paid for each hour of extra work?

    asked by Kelly on August 29, 2017
  39. electrochemistry

    What is the anode and cathode of this problem? A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is

    asked by Andrew on June 3, 2008
  40. Chemistry

    Balance the following redox equation using the oxidation-number-change method. Describe each step you use to balance the reaction. HCl(aq) + Zn(s) --> ZnCl2(s) + H2(g) I am really confused on how to do this as my book is very vague on this subject. Any

    asked by girly girl on April 16, 2018
  41. Physics

    A football player runs the pattern given in the drawing by the three displacement vectors A ,B ,C and . The magnitudes of these vectors are A = 4.00 m, B = 17.0 m, and C = 19.0 m. Using the component method, find the (a) magnitude and (b)direction of the

    asked by Kelli on July 14, 2011
  42. Science

    Which of the following is typically NOT a method scientists use to determine astronomic distances? a. brightness as compared to other objects b. color of the object c. radio wave signature d. the size an object in space appears I think it's c but I could

    asked by dbh on May 20, 2019
  43. Math

    Identify the sampling method. You want to determine the number of text messages students at your school send in a month. You go to the cafeteria and randomly ask students as they come out of the lunch line. A. Random B. Systematic C. Stratified D. None of

    asked by Lana on January 14, 2016
  44. Trig Help

    Given the equation for simple harmonic method d=1.3cos(3pi/4 t) answer the following questions: a)Find the maximum displacement. 1.i got 1.3 b)Find the frequency and length of the pendulum c)Calculate the value of d when t=3 i got .919 d)Determine the

    asked by Ryan on March 24, 2016
  45. math

    Suppose you have a $1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is $40. How much will you save in interest charges in June by paying $80 instead? $ 1

    asked by Anonymous on August 13, 2012
  46. Chemistry

    Having trouble balancing redox equations. Teacher says I should use the method of half reactions and I'm not sure how. Any explanation or formula would be nice. C6H12O2 --> C2H4O2 SO2+H2O+O2 --> H2SO4 C2H6O+O2 --> CO2 + H2O

    asked by Mike on April 1, 2014
  47. math

    Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $30. How much will you save in interest charges in June by paying $60 instead? $ 1

    asked by Anonymous on August 20, 2012
  48. MATH 156

    I need help with this question I'm reviewing for my final for next week. Thanks Perform the indicated operation. (84) ÷ [(-1) - (-7)] AND Find the GCF of the numbers using an appropriate method. 240, 10,000, and 4500 AND Write the number in scientific

    asked by NENAS on July 7, 2009
  49. ALGEBRA

    Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $40. How much will you save in interest charges in June by paying $80 instead?

    asked by Mike on May 20, 2012
  50. Computer programming

    Create the logic for a program that accepts inputs value for the projected cost of a vacation and the number of months until vacation. Pass both value to a method that displays the amount you must save per month to achieve your goal.

    asked by Kathy on November 23, 2015
  51. mathematics

    what does 'dx' signify in the integral and differentiation notation? I was reading integration by substitution method where it is required to replace 'dx' and change the independent variable such that the integral could be transformed.I have read in

    asked by Arvind on December 26, 2013
  52. !chemistry !experiment!

    Design an experiment which is not a tritation, you could use to calculate the percentage of water of crystalallization in NA2CO3.xH20. Need apparatus, detailed method including precutions and assumptions, how the results are recorded and how the percentage

    asked by Cameron on June 1, 2010
  53. Fine Art

    Compare Willem de Kooning's "Woman VI" and Edgar Degas' "The Glass of Absinthe". Use the critique method to compare the styles and style matter. Every bit of help will be appreciated! I'm really bad at this stuff and I've been struggling with it for a

    asked by Kylee on February 11, 2014
  54. math

    Suppose you have a $1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is $30. How much will you save in interest charges in June by paying $60 instead?

    asked by Anonymous on November 29, 2012
  55. Math, calculus, advanced functions, pre calculus

    An investments value, V(t) is modelled by the function V(t)=2500(1.15)^2, where t is the number of years after funds are invested A) find the instantaneous rate of change in the value of the investment at t=4, what intervals would you choose? Why? My

    asked by Ruffin on December 17, 2016
  56. math

    Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $20. How much will you save in interest charges in June by paying $40 instead?

    asked by Anonymous on May 25, 2012
  57. Physics Classical Mechanics

    Greco I am having a problem with the turntable (gyroscope) problem. The angular speed is 300 radians per second. I tried a couple of formulas including one by you. Maybe I am not converting the units properly. I could use some help. I tried several

    asked by Hil on November 25, 2013
  58. Algebra

    Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $20. How much will you save in interest charges in June by paying $40 instead?

    asked by shirley on May 28, 2012
  59. Please Help

    Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $20. How much will you save in interest charges in June by paying $40 instead?

    asked by shirley on May 28, 2012
  60. Math

    A fence surrounds a square plot of land. The area is 324 yd 2. Find the length of each side. Use the Systematic Guess and Check method. What I already know: It is a square shape. And all squares have equal sides.

    asked by Anon on April 22, 2015
  61. Math

    From the top of a 200 foot building, a bird is sighted overhead and a man is observed directly below the bird at ground level. The angle of elevation of the bird is 16*, and the angle of depression of the man is 43* find : a) the distance from the top of

    asked by Anonymous on December 15, 2015
  62. Chemistry

    A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic.

    asked by Rachel on March 9, 2012
  63. Chem

    Suppose solute A has a distribution coefficient of 1.0 between water and diethyl ether. Demonstrate that of 100mL of a solution of 5.0g of A in water were extracted with two 25-mL portions of ether, a smaller amount of A would remain in the water than if

    asked by Anonymous on May 5, 2010
  64. algebra

    1) The maintenance crew is doing some work on the arch. The work will be done on the right side of the arch. In order to bring the equipment up the maintenance crew has constructed a temporary ramp from the ground on left side of the arch to the level

    asked by reneet on May 28, 2014
  65. algebra

    1)the gateway arch, which can be closely approximated by a parabola, is 630 feet high and 630 feet across at the base. The Gateway arch is the tallest man-made monument found in the United States in St. Louis Missouri. The maintenance crew is doing some

    asked by reneet on June 2, 2014
  66. Economics

    2. (i) The production function for a firm is given by Q = LK where Q denotes output; Land K labor and capital inputs. Wage rate and rental rate are given by w and r respectively. (a) Show whether or not the above production function exhibits diminishing

    asked by Michelle on May 25, 2011
  67. physics

    Two forces, of magnitudes F1= 80.0N and F2= 50.0N, act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position x1= -3.00cm. At some later time, the block has moved

    asked by physics please show steps on June 15, 2011
  68. Physics please check

    Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) =

    asked by Mary on April 15, 2007
  69. Math 116 algebra

    There are 38 houses in a new community available with two floor plans. Floor plan x sells for $175,000 and Floor plan y sells for $200,000. The total worth of all available homes are $7,200,000. Write an equation that illustrates this situation. Part A:

    asked by Karine on March 25, 2010
  70. math (plz help)

    In a movie theater, theater A has 30 seats in the first row. Each next row has 4 more seats in it than the previous row has. 1) How many seats are in the 4th row? 2) Is there a row with exactly 60 seats in it? 3) Theater B has 40 seats in the first row and

    asked by Stacy on March 14, 2011
  71. math

    Hi I need someone to check my answers I'll show whatever work I have but for time purposes I'll just post my answers because I think I have most of them correct. Thanks! 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7. A)143 B)136

    asked by Jon on December 12, 2007
  72. chemistry

    i have had enough,and got no hair left,i need to find the structural formula for ill try my best to explain CH2=CH-CH-OH WITH A CH3 UNDER THE SECOND CH.+CH3-CH-C WITH A CH3 UNDER THE FIRST CH ,A DOUBLE BOND FROM THE C TO O AND A SINGLE BOND TO OH UNDER THE

    asked by jill on March 4, 2007
  73. Chemistry

    The molar mass of a non-dissociated, non-volatile compound is to be determined by dissolving 5.00 g of the compound into 50.0 g of benzene. The freezing point of benzene was lowered by 2.5 degrees C. The freezing point depression constant (Kf) for benzene

    asked by Jason on January 31, 2007
  74. Physics 1

    A shot-putter puts a shot (weight = 71.3 N) that leaves his hand at distance of 1.62 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.08 m above the ground. Include the correct sign for work. J

    asked by Anonymous on November 17, 2012
  75. chemistry

    The electrochemical cell described by the balanced chemical equation has a standard emf (electromotive force) of -4.05 V. Calculate the maximum electrical work (kJ) the cell has done if 6.8500 mol of F2(g) (Molar Mass - 38.00 g/mol) forms. Round your

    asked by j on December 4, 2011
  76. CHEMISTRY

    Been trying for days to crack this sure it staring me in the face understand princple just can't work out the one I have been given to do. I have to polymerize CH2=CH-CH-OH with a CH3 under CH next to the OH I need to identify the monomer unit and what

    asked by Need help PLEASE on February 27, 2007
  77. Physics

    A shot-putter puts a shot (weight = 71.9 N) that leaves his hand at distance of 1.47 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.20 m above the ground. Include the correct sign for work. J

    asked by Brandon on November 2, 2008
  78. CP Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronnie on April 8, 2010
  79. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ron on April 8, 2010
  80. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald on April 8, 2010
  81. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald on April 8, 2010
  82. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald on April 8, 2010
  83. Ummmm, LA Help?

    Think about the work you completed in your reading role. Determine the ideas that would be most worthy to share in a literary discussion about The Watsons Go to Birmingham—1963. Provide an explanation for your choices. How did the role you selected and

    asked by Agala on December 7, 2016
  84. Physics

    a great of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/ or a machine that produces more work or energy

    asked by John on November 16, 2016
  85. science

    How much work is needed to raise a 110-kg load of bricks 12m above the ground to a building under construction? According to the law of conservation of energy, the work required equals the change in potential emergy. To get the increase in potential

    asked by tasha on February 19, 2007
  86. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ron on April 8, 2010
  87. Algebra

    Let f(x) = x^2 – 3x + 8 and g(x) = x – 5 (a) Find the sum (f + g)(x) and simplify the results. (b) Find the composite function (f º g)(x) and simplify the results. (c) Find (f º g)(2) Show some work. (d) Find the composite function of (g º f)(x) and

    asked by Carmin on June 17, 2009
  88. Physics

    A cable lifts a 1370 kg elevator at a constant velocity for a distance of 42 m. What is the work done by the elevator's weight? The elevator weight is actually gravity. Gravity does - mass*g*height of work on the object.

    asked by Mary on February 27, 2007
  89. Health Physics

    As a result of doing work, a person supplies a machine with 1100 J of energy in 12 seconds. The machine in turn does work and delivers 900 J of energy in 14 seconds to some object. What is the efficiency of this machine?

    asked by Shannon on January 22, 2010
  90. science

    A 4.0 kg box is raised from rest a distance of 6.0 m by a vertical force of 110 N. (a) Find the work done by the force. (b) Find the work done by gravity. (c) Find the final kinetic energy of the box.

    asked by ali on October 10, 2010
  91. Physics

    As a result of doing work, a person supplies a machine with 1100 J of energy in 12 seconds. The machine in turn does work and delivers 900 J of energy in 14 seconds to some object. What is the efficiency of this machine?

    asked by Anonymous on January 25, 2010
  92. physics

    As a result of doing work a person supplies a machine with 1100 J of energy in 12 seconds. The machine in turn does work and delivers 900 J of energy in 14 seconds to some object. what is the effiecency of this machine?

    asked by CB on January 24, 2010
  93. English

    I am doing my application form for a university, it asks for my job information Job Title: I work at Mcdonalds part-time and work in the kitchen, what will my job title be? Kitchen staff? :S

    asked by Matthew on January 22, 2012
  94. English

    1. Last year, we had a school festival. I couldn't attend the school festival because of my illness. 2. Last year, we had a field trip. We couldn't enjoy the trip because of heavy rain. 3. Last year, we had a school talent show. We couldn't do well because

    asked by rfvv on July 16, 2013
  95. English/Language Arts

    My teacher has told us a number of times on how to write the "source" for writing a research paper. I keep forgetting, and I feel a little unnerved when asking her again & again. Can you please tell me how to write down different sources? Including

    asked by Danielle on April 30, 2007
  96. Statistics

    A study of 420,048 cell phone users found that 135 of them developed cancer of the brain or nervous system. prior to this study of cell phone use the rate of such cancer was found to be 0.0333% for those not using cell phones. Complete parts (a) and (b) a.

    asked by Rob on April 30, 2013
  97. Language Arts 7

    NEED HELP ASAP!!!!! Has anyone read "Two Kinds" from The Joy Luck Club? Need my answers checked please;) 1.) In "Two Kinds" why does the mother take her daughter to the Mission district to get her hair curled? a.)She wants her daughter to look more

    asked by Palena on March 22, 2017
  98. chemistry

    Referring to the following reaction: Pb(NO3)2 (aq) + Na2SO4 (aq) -->PbSO4 (s) + 2NaNO3 (aq) A solution of 0.114 M Pb(NO3)2 with a volume 10.6 mL is added to 12.4 mL of a solution of 0.105 M Na2SO4. Calculate the number of grams of PbSO4 that will form. I

    asked by Mona on May 6, 2015
  99. Science Check

    1)Two balls having the same mass of 1 kg roll toward each other, each moving at the same speed of 1 m/s. What is the combinded momentum? Would it be 0 kg m/s 2)A 30 kg girl and a 25kg boy face each other on friction free roller blades. The girl pushes the

    asked by Abby on March 9, 2007
  100. chemistry

    Calculate the ionic strength of the solution. a) 100 mL of 0.8M magnesium perchlorate, Mg(ClO4)2, is added to 900 mL of 0.30M perchloric acid, HClO4. No reaction. B)25 mL of 0.200M potassium iodide, KI, are mixed with 75 mL of 0.0300 M silver nitrate,

    asked by bria on September 8, 2006

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