Questions Asked in 2009

Most Popular Questions of 2009

  1. algebra 1 page 167 did you hear about...

    i need to finish the riddle. did you hear about... who knows this?

    asked by faith on February 22, 2009
  2. Pre-Algebra

    What do they call the International Hula Hoop Championships?

    asked by Mikayla on September 15, 2009
  3. 7th grade

    What did the spanish farmer say to his chicken

    asked by joe on October 21, 2009
  4. Chemistry

    Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Positive; or (b) Very close to Zero; or (c) Negative. Matching pairs N2 (g) + 3 H2 (g) = 2 NH3 (g) Mg (s) + CO2 (g) = MgO (s) + CO (g)

    asked by Chem Lover on November 28, 2009
  5. ap us history

    list ten political and economic reforms the Populists proposed in their platform during the populist movement

    asked by electra on November 20, 2009
  6. Physics

    An 80- quarterback jumps straight up in the air right before throwing a 0.43- football horizontally at 15 . How fast will he be moving backward just after releasing the ball? Suppose that the quarterback takes 0.30 to return to the ground after throwing

    asked by Lola PLEASE HELP! on April 12, 2009
  7. English Lit

    I have to write a review of the short story The Rocking Horse Winner. Is this good? "A Boy With a Gift and Curse" By Jon Blank This is a story of a middle class English family that finds themselves in a situation that is far above what they can afford. A

    asked by Anonymous on November 15, 2009
  8. Medicine

    What's the prescribed drug that calms you down when you are nervous? It starts with the letter V, I can't remember it for the life of me. and no it's not Viagra.

    asked by Ditto on November 17, 2009
  9. Physics

    A 75 kg box slides down a 25.0 degree ramp with an acceleration of 3.60 m/s^2. Find coefficient between the box and the ramp. What acceleration would a 175 kg box have on this ramp?

    asked by Terrence Eko on November 12, 2009
  10. Literature

    I have to write a book review on a captivity story that I've read. The instructions are: 'Choose a captivity story you know or have read, and share your findings about it in the form of a book review. Summarize the reason for the captivity, the main events

    asked by mysterychicken on October 28, 2009
  11. Film review

    I have to write a review of a film I've seen and need help on what are the things I need to include and how long it should be. I googled it but I'm still confused and stuck.

    asked by Anonymous on December 14, 2009
  12. Question

    Okay just wondering, is the 'bibliography' and 'credits' the same thing? thanks./

    asked by Larry on January 18, 2009
  13. Physics

    In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must

    asked by Zach on November 30, 2009
  14. spanish help quick!!! i have to submit my answers!

    so we are learning the pred. v imperfect but i don't know when to use which i sort of have an idea like habitual inturrupting etcetc but i get them all wrong El lunes pasado yo _tuvé__ una discusión con un compañero de clase. La discusión __comenzaba_

    asked by hayden on February 21, 2009
  15. Chemistry

    For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5. ) i, iii, iv

    asked by Apple on November 22, 2009
  16. 7th grade

    how do you know when something has energy?

    asked by hanna on April 15, 2009
  17. physics

    Reggie Jackson stepped up to the plate and hit a .15 kg fast ball traveling at 36m/s, the impact caused the ball to leave his bat with a velocity of 45 m/s in the opposite direction. If the impact lasted for .002 seconds, with what force did Jackson exert

    asked by chelsea on May 27, 2009
  18. physics

    A cylinder that has a 40.0 cm radius and is 50.0 cm deep is filled with air at 20.0°C and 1.00 atm. A 21.0 kg piston is now lowered into the cylinder, compressing the air trapped inside. Finally, a 79.0 kg man stands on the piston, further compressing the

    asked by Jessi on August 23, 2009
  19. Chemistry: Electron Configurations

    Write the electron configuration for the following ion. V3+ I got 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2. In simplified form, I got [Ar]4s^2. I checked my answer against the answer given in the back of my chemistry textbook, and the two didn't correspond. The

    asked by Anonymous on November 4, 2009
  20. Chemistry

    Identify any incorrect formulas. explain your answer. a. Mg2(SO4)3 b. Rb3As c. BeCl3 d. NaF

    asked by Minny on November 5, 2009
  21. Physics

    Christian is making a Tyrolean traverse. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 25 m away. The rope must sag sufficiently so it won't break. Assume the rope can provide a

    asked by Precilla on September 23, 2009
  22. Spanish

    Invierno tardio No es increíble cuanto ven mis ojos: nieva sobre el almendro florido, nieva sobre la nieve. Este invierno mi ánimo es como una primavera temprana, es como un almendro floroido bajo la nieve. Hay demasiado frío esta tarde en el mundo.

    asked by Larry on April 5, 2009
  23. math

    what is the title of this picture?

    asked by Jena on January 21, 2009
  24. chemistry

    For the following: i) H3PO4 > H3AsO4 > H3SbO4 ii) H2Te > H2Se > H2S > H2O iii) HCl > HBr > HI iv) SbH3 > AsH3 > PH3 > NH3 The order of acidity is correct for which series? 1. ) all are correct 2. ) i and ii 3. )i, ii and iv 4. ) ii, iii 5. ii, iv I know

    asked by bob on November 24, 2009
  25. physics

    you are standing on one side of the river. Figure out the width of the river. All calculations have to be made on the side you are standing on. You cant step into the river or cross it. You may use the 2 laws ( sine and cos ). no guessing allowed. has to

    asked by just wondering on September 12, 2009
  26. Chemistry

    Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")? Note that no "endo-on" cases appear here, as these are always

    asked by victor on November 22, 2009
  27. Chemistry

    When 20.5g of methane and 45.0g of chlorine gas undergo a reaction that has a 75.0% yeild, what mass of chloromethane forms?

    asked by Sam on September 29, 2009
  28. math

    2. Mrs. young has her 18 students seated in a circle. They are evenly spaced and numbered in order. which student is directly opposite these three students? .student#1? .student#5? .student#18?

    asked by afo on December 4, 2009
  29. maths

    a man loses 12.5% of his money & after spending 70% of the remainder , he was left with Rs 210/- . the money he had at the beginning is?

    asked by rupesh on October 21, 2009
  30. 12th Physics

    A 55 kg ice skater is at rest on a flat skating rink. A 198 N horizontal forceis needed to set the skater in motion.However, after the skater is inmotion, a horizontal force of 175 N keeps the skater moving at a constantvelocity. Find the coefficients of

    asked by Melissa on December 8, 2009
  31. chemistry

    Calculate the delta H for the reaction N2H4(l)+ O2(g) --> N2(g) + 2H20(l) Given the following data: 2NH3(g) + 3N20(g) --> 4N2(g) + 3H20(l) N20(g) + 3H2(g) --> N2H4(l) + H20(l) 2NH3(g) + 1/2O2(g) --> N2H4(l) + H20(l) H2(g) + 1/2O2(g) --> H20(l)

    asked by kilo on October 28, 2009
  32. College Physics

    an escalator carries you from one level to the next in the airport terminal. the upper level is 4.5 m above the lower level, and the length of the escalator is 7 m. your mass is 60 kg. how much work does the up escalator do on you when you ride it from the

    asked by HP on November 12, 2009
  33. Math

    why didn't klutz do any home work on saturday also what did the girl melon say when the boy melon proposed marriage

    asked by Sam on April 15, 2009
  34. chemistry

    How many calories are required to heat 25.0 g of platinum from 24.5 °C to 75°C (specific heat of platinum = 0.139 J/gK)? 1. 47 cal 2. 42 cal 3. 48 cal 4. 20 cal 5. 80 cal Thank you.

    asked by Danny on November 22, 2009
  35. math ws

    what do you call it when someone pays back a loan quickly? thanks for any help

    asked by maryanna on March 1, 2009
  36. chemistry

    A saturated solution was formed when 4.48×10−2 L of argon, at a pressure of 1.0 atm and temperature of 25 C, was dissolved in 1.0 L of water. Calculate the Henry's law constant for argon in mol/atm. I got an answer of 1.4*10^-3, maybe my units are

    asked by RE on September 17, 2009
  37. physics

    A boy reaches out of a window and tosses a ball straight up with a speed of 10 m/s. The ball is 20 m above the ground as he releases it. Use energy to find The ball's speed as it passes the window on its way down and speed of impact on the ground.

    asked by Anonymous on October 29, 2009
  38. physics

    a jet pilot takes his aircraft in a vertical loop. a) if the jet is moving at a speed of 2000 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0g's

    asked by jeffery on October 4, 2009
  39. Physics

    A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively.

    asked by Ashley on September 25, 2009
  40. Physics

    A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0

    asked by annemarie on August 8, 2009
  41. chemistry

    Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant. For example, the residual pressure in a can is 1.36 atm when it is

    asked by Katie on December 6, 2009
  42. physics

    please show me in steps how to solve this thanks alot! A bobsled zips down an ice track, starting from rest at the top of a hill with a vertical height of 150m. Disregarding friction, what is the velocity of the bobsled at the bottom of the hill? (g=9.81

    asked by y912f on February 14, 2009
  43. Ap Chemistry

    Hydrogen gives off 120. J/g of energy when burned in oxgyen, and methane gives off 50. J/g under the same circumstances. If the mixture of 5.0 g of hydrogen and 10. g of methane is burned, and the heat released is transferred to 50.0 g of water at 25.0

    asked by Shawn on October 17, 2009
  44. Home Economics(sewing)

    1)what does the term "disposal of fullness" mean? 2)What are 4 methods of controlling fullness and how is that method done? 3)What are 5 reasons why people dispose of fullness? 4)CAN YOU SEND ME THE NAME OF A WEBSITE(S) THAT HAS PICTURES OF GARMENTS

    asked by kerry-Ann on April 9, 2009
  45. Chemistry

    Topic: Sublimation and Fusion How much heat (in kJ) is required to warm 13.0 g of ice, initially at -14.0 C, to steam at 112.0 °C? The heat capacity of ice is 2.09 J/g⋅°C and that of steam is 2.01 J/g⋅°C. Any help on how to start this is really

    asked by Pete on March 29, 2009
  46. physics

    The question is a child slides down a slide with a 28 degree incline and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of the kinetic friction between the slide and the

    asked by perry on September 18, 2009
  47. english

    what does these quote mean? 1.)"my life for itself and not for a spectacle" 2.)An institution is the lengthened shadow of a man. 3.) Life only avails, not the having lived. 4.) Insist on yourself; never imitate Thanks for your help!

    asked by jess on January 4, 2009
  48. Math

    In 1968, the U.S. minimum wage was $1.60 per hour. In 1976, the minimum wage was $2.30 per hour. Assume the minimum wage grows according to an exponential model w(t), where t represents the time in years after 1960. Find the Formula for w(t) My work so

    asked by SC on November 3, 2009
  49. chemistry

    When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? a. ) KMnO4(aq) b. ) MnO2(s) c. ) MnCl2(aq) d. ) Mn(s) im guessing its Mn(s)...but i don't know if im right can someone plz help me? :(

    asked by nigel s on December 4, 2009
  50. Physics

    The drawing shows a large cube (mass = 25 kg) being accelerated across a horizontal frictionless surface by a horizontal force . A small cube (mass = 4.0 kg) is in contact with the front surface of the large cube and will slide downward unless is

    asked by Litany on November 13, 2009
  51. chemistry

    the quantity of electricity required to reduce 12.3g of nitrobenzene to aniline assuming 50% current efficiency is 1. 115800 C 2. 57900 C 3. 231600 C 4. 28950 C

    asked by hriday on March 2, 2009
  52. Calc

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

    asked by Aaron on November 30, 2009
  53. sat essay

    Can any obstacle or disadvantage be turned into something good? Obstacles, which are the essential part of our lives, often seem to prevent us from reaching our goals and frustrate us. Therefore, most people think that difficulties are bound to exert

    asked by Mercedes on November 5, 2009
  54. English

    A: Hello. May I speak to Tom? B: Speaking. Who's calling, please? A: Hi, Tom. This is Sam. How are you doing? B: Just fine. How's your new school? A: It's great. By the way, what are you doing? B: I'm playing computer games. A: Will you come to Yunsan

    asked by John on April 20, 2009
  55. Physics

    a 75-kg petty theif wants to escape from a third story window. unfortunately a makeshift rope of sheets tied together can support a mass of only 58 kg. how might the theif use this rope? give a quantitative answer.

    asked by Sasha on October 24, 2009
  56. math

    what kind of music do barbers and tailors play together?

    asked by megan on October 23, 2009
  57. Chemistry

    Consider the following reaction: 2NiO (s)--> 2Ni(s) + 2O2 (g) If O2 is collected over water at 40.0 C and a total pressure of 752 mmHg, what volume of gas will be collected for the complete reaction of 25.67 g of NiO? I am struggling to set up this

    asked by Charlie on December 7, 2009
  58. Math

    What did they call the duck who became a test pilot? (no it is not firecracker) (its 13 letters) (the worksheets box thing is sk y s af e il ly be er st qu it i a du ck mb in h er up)

    asked by skoolgurl on January 5, 2009
  59. AP Environmental Science

    A new trend in environmental susatinability is reclamation. Reclamation is taking any disturbed areas and trying to converth them back to natural state. Describe the costs, impacts, and success in reclaming a gold mine.

    asked by Anna on April 7, 2009
  60. 8th grade

    how do you write a song that will knock over a cow?

    asked by wyatt on April 1, 2009
  61. Clothing & Textile

    1. Define the term "Disposal of fullness" 2a.four methods of controlling fullness. 2b. bive a detailed description of each on how it is done. 3. reasons why persons dispose of fullness garments. 4. labelled pictures of garments showing methods of

    asked by Shari-lee Graham on April 20, 2009
  62. spanish did i use the right verbs?

    Estoy cansado de que mi padre (1) fumando (fumar).

    asked by Lor on October 14, 2009
  63. physics

    In Fig, a runaway truck with failed brakes is moving downgrade at 160 km/h just before the driver steers the truck up a frictionless emergency escape ramp with an inclination of è = 11°. The truck's mass is 1.5 x 104 kg. (a) What minimum length L must

    asked by sweety on March 21, 2009
  64. AP Physics - Equilibrium

    The Achilles tendon is attached to the rear of the foot as shown in the figure below. When a person elevates himself just barely off the floor on the ball of one foot, estimate the tension Ft in the Achilles tendon (pulling upward) and the (downward) force

    asked by Henry on November 13, 2009
  65. chemistry

    The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

    asked by matt on June 22, 2009
  66. Physics - HELP

    A 0.40 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.5 m on a frictionless horizontal surface. The cord will break when the tension in it exceeds 61 N. What is the maximum speed the ball can have?

    asked by Anonymous on October 27, 2009
  67. Math

    The height, h, in metres, above the ground of a rider on a Ferris wheel can be modelled by the equation: h= 10 sin ((pi/15 t) - 7.5) + 12 where t is the time, in seconds. At t=0, the rider is at the lowest point. Determine the first two times that the

    asked by - on November 16, 2009
  68. chem

    The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm. i guess it is FCC ( face cenred cubic) 1-- What are the coordination numbers of and Li^+ and S^2- in the lithium sulfide

    asked by Dr Bob plz help on January 24, 2009
  69. Algebra

    Use the quadratic formula to solve the equation. Give exact answers: 2x^2 -1 = 6x. The choices are: a) -3 + square root(7)/2, -3 - square root(7)/2 b) 3 + square root(11)/2, 3 - square root(11)/2 c) 3 + square root(7)/2, 3 - square root(7)/2 d) -3 + square

    asked by Hope on June 3, 2009
  70. math

    A rectangular lot is bordered on one side by a stream and on the other 3 sides by 600m of fencing. The area is a maximum. Determine the area.

    asked by Anonymous on October 22, 2009
  71. physics

    A 0.400 kg ball is shot directly upward at initial speed 40.0 m/s. What is its angular momentum about a point 2.0 m horizontal from the launch point, when the ball is a) at maximum height and b) halfway back to the ground? What is the torque on the ball

    asked by jane on June 13, 2009
  72. Chemistry

    Le Chateleir`s Principle Please check if my answers are right and i dunt know some of them: Consider the following system at equilibrium: A(aq)+B(aq) 2C(aq) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or

    asked by Saira on February 5, 2009
  73. math

    The London Eye is a large ferris wheel. Each sealed and air-conditioned passenger capsule holds about 25 passengers. The diameter of the wheel is 135 m, and the wheel takes about half an hour to complete one revolution. a) Determine the exact angle, in

    asked by - on November 6, 2009
  74. physics

    10. A cannon elevated at an angle of 35º to the horizontal fires a cannonball, which travels the path shown in the diagram below. [Neglect air resistance and assume the ball lands at the same height above the ground from which it was launched.] If the

    asked by Physics Student need help on November 12, 2009
  75. Math

    How much longer (percentage) is a one-mile race than a 1500- race?

    asked by Carrie on August 28, 2009
  76. math

    How do you find the area for an irregular figure using 3.14 for pi?

    asked by alice on January 13, 2009
  77. 12th grade

    A particle starts at x=0 and moves along the x-axis with velocity v(t)=2t+1 for time t is less than or equal to 0. Where is the particle at t=4?

    asked by Barbara on January 6, 2009
  78. Physics

    A potter’s wheel with rotational inertia of 45 kg m2, is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel where it sticks a distance 1.2 m from the rotational axis at the wheel’s center. If the subsequent angular speed of the

    asked by Sarah on June 29, 2009
  79. science

    a ball is thrown straight upward and returns to the thrower's hand after 3.00s in the air. A second ball is thrown at an angle of 30.0 deg with the horizontal. At what speed must the second ball be thrown so that it reached the same height as the one

    asked by tani on September 8, 2009
  80. chemistry

    The reaction converting glycerol to glycerol-3-phosphate is energetically unfavorable by 9.2kJ. The reaction of ATP with water to yield ADP, hydrogen phosphate ion, and hydrogen ion is energetically favorable by 30.5kJ. These reactions are coupled so that

    asked by CHEMistry on March 19, 2009
  81. MACROECONOMICS

    Which of the problems in the construction of the CPI might be illustrated by each of the following situations? Explain. a. the invention of the Sony Walkman b. the introduction of air bags in cars c. increased personal computer purchases in response to a

    asked by SARA on April 12, 2009
  82. physics

    An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0400g. What is the maximum force the motor should exert on the supporting cable? What is the minimum force the motor should exert on the supporting cable?

    asked by DJ on October 8, 2009
  83. math

    What did the electrician say to his daughter when she came home at 2A.M.

    asked by Anonymous on November 27, 2009
  84. Physics

    Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v_0. Car 1 begins to move at t=0, speeding up with a constant acceleration a_x. Car 2

    asked by RJ on May 26, 2009
  85. PHYSICS

    a child sitting 1.10 m from the center of a merry go round moves with a speed of 1.25 m/s. calculate the centripetal acceleration of the child and the net horizontal force exerted on the child (mass = 25 kg).

    asked by Sasha on November 3, 2009
  86. physics

    A man can throw a ball a maximum horizontal distance of 97.8 m. The acceleration of gravity is 9.8 m/s2 . How far can he throw the same ball verti- cally upward with the same initial speed? Answer in units of m.

    asked by Letisha on November 25, 2009
  87. physics

    a child causes a wagon to accelerate by pulling it with a horizontal force. newton's third law says that the wagon exerts an equal and opposite force on the child. how can the wagon accelerate? (hint: draw a free-body diagram for each object.)

    asked by billy on November 2, 2009
  88. Chemistry: help please

    What is the millimolar solubility of oxygen gas,O2, in water at 20 degree celsius, if the pressure of oxygen is 1.00atm?

    asked by Erin on February 1, 2009
  89. Chemistry-Please help

    A solution contains one or more of the following ions: Hg2 2+,Ba2+ ,Fe2+ and . When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no

    asked by Rose on October 5, 2009
  90. Physics

    Please someone help me I'm desperate!!!! Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 420.0 N of tension. String B has a diameter of 1.3 mm and is under a tension of 840.0N . Find the ratio of the wave

    asked by Frank on November 20, 2009
  91. Calculus

    How do I solve lim(x-->pi/4)(sinx-cosx)/cos(2x) The (x-->pi/4) goes below the lim. Should i just substitute the x's with pi/4??

    asked by Alex on February 21, 2009
  92. math

    The Moon orbits Earth every 27.3 days. Determine the angular velocity of the Moon, in degrees per day and in radians per day. The radius of the orbit of the Moon is about 384 400 km. How far does the Moon move along an arc of it's orbit every?

    asked by Anonymous on November 8, 2009
  93. Physics

    While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.25-m piece of fishing line. The weight makes a complete circle every 0.50 sec. What is the angle that the fishing line makes with the vertical?

    asked by Sam Line on October 29, 2009
  94. Advanced Functions

    Consider the trig equation: 4sinxcos2x + 4cosxsin2x - 1 = 0 in the Interval [0, 2 pi] Either show that there is no solution to the equation in this domain, or determine the smallest possible solution.

    asked by Anonymous on November 16, 2009
  95. PHYSICS

    Wile E. Coyote is holding a “HEAVY DUTY ACME ANVIL” on a cliff that is 40.0 meters high. The Roadrunner (beep-beep), who is 1.0 meter tall, is running on a road toward the cliff at a constant velocity of 10.0 m/s. Wile E. Coyote wants to drop the anvil

    asked by Jin on November 9, 2009
  96. 12

    The Green Mountain Inn can rent all its 210 rooms when it charges $45 per night for a room, but the manager wants to increase profits. He finds, however, that for each $2 increase in the room rate, 3 fewer rooms are rented. If the cost of cleaning an

    asked by Ak on November 3, 2009
  97. Physics

    In a playground, there is a small merry-go-round of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to the rim of the

    asked by Ray on October 26, 2009
  98. chemistry

    When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? (Use data from table 20.1, and Appendix D page A28-A29 in Petrucci) 1. ) Mn(s) 2. ) MnCl2(aq) 3. ) KMnO4(aq) 4. ) MnO2(s) the answer i got was MnCl2,,,,but im not

    asked by mandeep on December 1, 2009
  99. physics please help :)

    a.the gravitational force between 2 electrons 1.00m apart is 5.42x10^-71 N. Find the mass of an electron. b.2 spherical balls are placed so their centres are 2.6m apart. The force between the balls is 2.75x10^-12N. What is the mass of each ball if one ball

    asked by Anonymous on December 8, 2009
  100. Math: Calculus

    The max. weight M that can be supported by a beam is jointly proportional to its width w and the square of its height h, and inversely proportional to its length L. a) write an equation that expresses the proportionality. b) determine the constant of

    asked by Anonymous on September 22, 2009