Questions Asked on
March 31, 2008

  1. Physics

    Medical x rays are taken with electromagnetic waves having a wavelength around .1 nm. What are the frequency, period, and wave number of such waves? ok I got the frequency as 3 * 10^18 Hz and the wave number as 6.3 *10^10 rad/m but I can't seem to remember

    asked by J
  2. physics

    if you shook the end of a rope up and down three times each second, what would be the period of the waves set up in the rope? what would be the frequency? plz help me i am so stressed out!

    asked by tony
  3. physics EM

    You have a 0.600-m-long copper wire. You want to make an N-turn current loop that generates a 1.30 mT magnetic field at the center when the current is 0.600 A. You must use the entire wire. What will be the diameter of your coil? this doesnt seem that hard

    asked by Spencer
  4. chemistry

    The Ksp of Ag2CrO4(s) is 1.12 x 10^-12. Calculate the molar solubility of AgCrO4(s) a)in pure water b) in a solution of 0.10 mol/L sodium chromate, Na2CrO4(s)

    asked by ChemMaster98
  5. physics

    An elastic cord is 65 cm long when a weight of 75 N hangs from it but is 85 cm long when a weight of 189 N hangs from it. What is the “spring” constant k of this cord

    asked by leena
  6. social studies

    how did the spanish conquest affect native americans and africans?

    asked by sara
  7. vhem

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

    asked by nelson
  8. chemistry

    At 25 degrees celsius and 1.0 atm, 0.25g of a gas dissolves in 1.00L of water. What mass of the gas dissolves in 1.00 L of water at 25 degrees celsius and 3.0 atm?

    asked by Anonymous
  9. Physics

    We can reasonaly model a 75 W incandescent lightbulb as a sphere 6 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to nonvisible infrared radiation. (a) What is the visible light intensity (in W/m^2) at

    asked by J
  10. pre calc

    The velocity of an aiplane heading east at 400 knots and a wind velocity of 50 knots northeast. The airplane encounters this wind, show the resultant velocity. What is the resulant speed and direction of the airplane? (the direction is the angle the

    asked by Julie
  11. chemistry

    If 1.00 mol each of carbon dioxide and hydrogen is initially injected into a 10.0-L reaction chamber at 986 degrees Celsius, what would be the concentrations of each entity at equilibrium? CO2(g) + H2(g) „²„³ CO(g) + H2O(g) k = 1.60 for 986 degrees

    asked by Nathaniel
  12. Physics

    When a solar flare erupts on the surface of the sun, how many minutes after it occurs does its light show up in an astronomer's telescope on earth? I am totally confused..help!

    asked by J
  13. sensory abilites of the dog

    please check my answer thanks A dog's ability to smell can be disturbed by problems with the A. ears B. teeth C eyes D tongue I said teeth (b)

    asked by sarjh
  14. physics/chem

    n Fig. 21-41, three identical conducting spheres initially have the following charges: sphere A, 7Q; sphere B, -8Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two

    asked by dave
  15. chem-calorimetry

    If a 5.26-g sample of copper at 258C is placed in 125mL of water at 21.0C, how hot will the water get? Assume no heat loss to the surroundings. The specific heat of copper is .385 J/g C

    asked by natash
  16. physics help please

    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 indicated that a magnetic field of magnitude 1.0 10-3 T, oscillating at

    asked by Chris Adison
  17. Micreoeconomics

    1. Assume a perfectly competitive constant cost industry, currently in long-run equilibrium. Market demand in the industry is given by Q = 1500 - 25P. The short-run market supply curve is given by: Q = 15P - 100 for P B 10 = 0 for P < 10 There are 25 firms

    asked by Chi
  18. chemistry

    Calculate the solubility of iron(II) carbonate at 25 degrees Celsius. The Ksp of FeCO3(s) is 3.5 x 10^-11 at 25 degrees Celsius: Heres what I have done so far: 1)The balacned equation for this reaction is Fe2CO3 --> 2Fe+ + CO3- 2)KsP = [Fe+][CO3-] 3)

    asked by Jessica
  19. another EM

    Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 2.50-mm-diameter superconducting wire. What size current is needed? Thanks in advance

    asked by Spencer
  20. physics EM repost

    Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 2.50-mm-diameter superconducting wire. What size current is needed? Thanks in advance

    asked by Spencer
  21. finance

    I would like to enquire if you could help with the following assignment question. The exact assignment question is: Explain how an investor or analyst should analyse a company's financial statements in order to gain the maximum insight for valuation

    asked by shreya
  22. physics/calc

    A worker on scaffolding 75 ft above the ground needs to lift a 500 lb bucket of cement from the ground to point 30 ft above the ground by pulling on a opre weighing .5 lb/ft. how much work is required? I know to use the Work integral, but im not sure wat

    asked by Jessica
  23. chemistry

    Much of the brown haze hanging over large cities is nitrogen dioxide, NO2(g). Nitrogen dioxide reacts to form dinitrogen tetroxide, N2O4(g), according to the equilibrium. 2NO2(g) N2O4(g) + 57.2 kJ (brown) (coulorless) Use this equilibrium to explain why

    asked by ChemMaster98
  24. chem

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

    asked by nelson
  25. 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 and heated to a

    asked by Laureta
  26. English

    Animals have been used in medical research for centuries. Most of the animals used for research are rodents such as rats, mice, hamsters and gerbils. Some dogs, cats and a variety of goats, ferrets, pigeons, monkeys and rabbits are also used .The struggle

    asked by Walker
  27. Physics

    During 2004, japanese scientists successfully tested two solar sails. One had somewhat complicated shape that we shall model as a disk 9 m in diameter and 7.5 um thick. The intensity of solar energy at this location was about 1400 W/m ^2. (a) What force

    asked by J
  28. physics

    18)An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s, in what direction should the plane head to reach its destination? 6.42 degrees south of east 19)A 4400 kg

    asked by Jon
  29. chemistry

    2.241g sample of nickel reacts w oxygen to form 2.85g of the metal oxide. Calculate the empirical formula of the oxide?

    asked by lizzie
  30. chemistry

    Given the equilibrium system PCL5(g) PCl3(g) + Cl2(g) K = 12.5 at 60 degrees celsius. A 1.0 L reaction vessel is analyzed and found to contain 3.2 mol Cl2(g), 1.5 mol PCl3(g) and 2.0 mol PCl5(g). Show that the reaction mixture has not yet reached

    asked by ChemMaster98
  31. math

    Helping my son with %. I can't remember how. Here is the question. The baseball team has played 35 games so far this season. Of those games, they've won 21. What percent of the games played has the team won? Can someone help me with the formula

    asked by shannon
  32. chem.

    How much heat (in Joules) is gained by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 12C?

    asked by gerald
  33. Biology

    Assuming that the conditions of the Hardy-Weinberg equilibrium are met, determine the genotype and phenotype frequencies in the second generation of a population containing 64% tasters and 36% nontasters q2 = _________ Tasters ____________ q =

    asked by cat
  34. Chem

    How many grams of nickel can be produced by passing a current of 15.0A through aqueous nickel(II) chloride for 80.0 minutes? I'm not sure if I'm on the right path... All I know is that 1 coloumb= amperes x seconds 1F=96485c/eq eq=molar mass/charge Since MM

    asked by Ginger
  35. physics

    15)If a horizontal force applied on a resting object is greater than the force of friction, the object will. accelerate in the direction of the applied force 16)You are pushing a 55N lawnmower across the yard. Its handle makes a 55 degree angle with the

    asked by Jon
  36. chemistry

    I would also like to see Nathaniels work solved:P I have a similar question If 1.00 mol each of carbon dioxide and hydrogen is initially injected into a 10.0-L reaction chamber at 986 degrees Celsius, what would be the concentrations of each entity at

    asked by Jessica
  37. tough physics question

    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
  38. chemistry

    Given the following solubilities, calculate the value of the Ksp for Copper(II) Sulfide, 8.89 x 10^-19

    asked by Jessica
  39. chem-calorimetry

    what approach do you suggest using to prevent your water sample from cooling off beore you start your measurements?

    asked by natash
  40. chem

    when ammonium nitrate decomposes, nitrogen, hydrogen, and oxygen gas are generated per the reaction 2NH4NO3(s)=2N2(g)+4H2+3O2(g). when 23 g NH4NO3 decomposes what total volume of gas at 1 atm and 298 do you get?

    asked by bill
  41. Chem

    The entropy of combustion of benzoic acid is zero. This means that... a)combustion is not spontaneous here. b)combustion is spontaneous, however, since the reaction is exothermic. c)combustion is spontaneous, however, since the reaction is endothermic.

    asked by Ginger
  42. English

    List 3 examples of alliteration found in Beowulf.

    asked by Morgan
  43. spell

    Animals have been used in medical research for centuries. Most of the animals used for research are rodents such as rats, mice, hamsters and gerbils. Some dogs, cats and a variety of goats, ferrets, pigeons, monkeys and rabbits are also used .The struggle

    asked by Walker
  44. Chem

    For the evaporation of water during perspiration on a hot, dry, day, a)DH > 0 and TDS = DH. b)DH > 0 and TDS > DH. c)DH > 0 and TDS < DH. d)DH < 0 and TDS > DH. This is my thinking...It can't be d because DH can't be less than 0, and it can't be a because

    asked by Ginger
  45. chemistry

    What is solubility of CaF2 in a solution buffered at pH 5

    asked by Karen
  46. Algebra

    Does anyone know the significance of the rational zero test? Is it the rational root test? I can find the rational root test, but I don't know where I can find the reason for the rational zero test. Any clue?

    asked by Tim
  47. Physics

    In TV picture, faint, slightly offset ghost images are formed when the signal from the transmitter travels to the receiver both directly and indirectly after reflection from a building or some other large metallic mass. In a 25 inch set, the ghost is about

    asked by J
  48. science

    how does the total energy change when a falling rock hits the ground?

    asked by nick
  49. chemistry

    Calculate the Calorimeter Constant if 25 g of water at 58C was added to 25 g of water at 25C with a resulting temperature of 35C?

    asked by bipasha
  50. Spanish

    I have to write sentences with subjunctive verbs in them, and I'm supposed to remember WEIRDO to help me remember the uses of the subjunctive. I understand Will/Wish and Emotion and Impersonal expressions and Requests and Doubt/Denial, but I don't

    asked by Ausyn
  51. AED 201

    will teacher reforms (such as comprehensive testing of teachers or requiring ongoing professional development) attract or intimidate individuals from joining the teaching profession? How do the reforms affect your own desire to enter the profession?

    asked by Dawn
  52. Microeconomics

    1. A perfectly competitive industry comprises of 35 competitive, profit-maximizing firms, each of which has short-run total costs and marginal costs of SMC = 0.25q STC = 20 + 0.125q(squared) The market demand curve is P = 20 − 0.05Q (a) Find P, q and Q

    asked by Chi
  53. finance

    I would like to enquire if you could help with the following assignment question. The exact assignment question is: Explain how an investor or analyst should analyse a company's financial statements in order to gain the maximum insight for valuation

    asked by shreya
  54. 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 marisol
  55. chemistry

    How will the removal of some HOCl(g) from the following system affect the equilibrium? H2O(g) + Cl2O(g) -----> HOCl(g)

    asked by Jessica
  56. English expression

    What does he look like? He is tall and thin. He is tall and of medium weight. He is neither tall not heavy. He is short and thin, and has dark brown eyes. He is of medium weight and height. He is short, has dark brown eyes, and has black hair.

    asked by John
  57. English

    This was a quick English paper on a little bit of family history, I need proofreading please =) Dina Cheng Thomas/Caffrey American Studies ¾ 2 April 2008 TITLE The scent of the salty air from the beach and the splash from the hopping dragon fishes in the

    asked by Help proofread?
  58. Pre-Algebra

    In 2002 the rate for a first class U.S. postage stamp increased to $0.37. This represent a $0.34 increase since 1917. What is the percentage increase of postage since 1917? Solve the problem using a proportion.

    asked by Joy
  59. spell

    What would be a good title for this essay? Also, what is wrong about this essay? Essay: Animals have been used in medical research for centuries. Most of the animals used for research are rodents such as rats, mice, hamsters and gerbils. Some dogs, cats

    asked by Walker
  60. chemistry

    Good day to everyone My class has just started a "Chemistry systems in Equilibrium" unit and I have a question I would like answered if possible, I would truly appreciate this. My Question: How will the following system change when F2(g) is added to a

    asked by Jessica
  61. math

    SOLVE THE EQUATION BY FACTORING PLEAZE EXPLAIN.THANKS. 19. 6X TO SECOND POWER-10X-4=0

    asked by SYNESTER
  62. Math

    Can some one explain these to me i need the factors. i am totally lost. thanks x^2+x-6 x^2+7x+10 x^2+5x+6 x^2+2xy+15y^2

    asked by joyce
  63. Algebra

    how do you simplify square root of 27 minus square root of 49 all divided by square root of 3. I have gotten two different answers when I tried to check it. It kind of looks like (27-49) (3) except all the numbers have their own square root symbol. I don't

    asked by Casey
  64. physics/chem

    Calculate the number of coulombs of positive charge in 261 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)

    asked by dave
  65. Ancient History

    ‘It was Sparta, not Athens which won the war against Persia’. To what extent is this view of the Persian War correct? I've decided that it the statement is patly correct. Is there any websites/study guides/free essays that could help me with ideas for

    asked by TP
  66. Physics

    An 1567 kg car, being lifted at a steady speed by a crane, hangs at the end of a cable whos radius is .0084. The cable is 5m in length and stretches by .0081 becuase of the weight of the car. What is young's modulus for the cable?

    asked by Erich
  67. chem-Calorimetry

    If the warm water in this experiment (Im not quite sure if you need more information) is at 98C, how much heat must be relesed in order for the temperature of 100. mL of water to decrease to 32C ?

    asked by natash
  68. physics

    When graphing motion the steepness of the slope depends on what

    asked by lorelei
  69. biology

    A population shows 81% have the dominant phenotype. If Hardy-Weinberg conditions are met, what will be the genotypic frequencies in the next generation? ______Homozygous dominant _____ Heterozygous ______Homozygous recessive

    asked by rod
  70. Chem

    For the evaporation of water during perspiration on a hot, dry, day, a)DH > 0 and TDS = DH. b) DH > 0 and TDS > DH. c) DH > 0 and TDS < DH. d) DH < 0 and TDS > DH. I don't think it can be d because DH can't be less than 0. And I don't think it can be a

    asked by Ginger
  71. science

    1. How many traits are involved in a monohybrid cross? How many alleles are involved? 2. What prevents the expression of a recessive allele? 3. When gametes form, what happens to the alleles for each trait? Does anyone have any information on this topic?

    asked by Amanda
  72. accounting

    Dr. Stephanie White, the Chief Administrator of Uptown Clinic, a community mental health agency, is concerned about the dilemma of coping with reduced budgets next year and into the foreseeable future, but increasing demand for services. In order to plan

    asked by Anonymous
  73. physics

    12)It is summertime and two boys cannot wait for winter. One boy exerts a 70N horizontal force as he pushes his 58 kg friend standing on a snowboard across a cement sidewalk at a constant speed. What is the coefficient of kinetic between the sidewalk and

    asked by Jon
  74. Physics

    A Geiger counter measures redioactive decay by registering the electrical pulsed produced in a gas tube when high-energy particles pass through it. The particles emanate from a redioactive source-say, radium. In accord with Heisengerg's Uncertainty

    asked by TJ
  75. Social studies

    What effects does mining have on the environment? what are the pro's and con's of mining?

    asked by Caroline
  76. Algebra

    How do you work square root problems when there is a number outside the radical that needs to be divided out. Example: 2(square root of 5x-1)=3(square root of 2x+4). How can you get both of the radicals by themselves in order to solve the equation?

    asked by Catey
  77. Science

    What year was Hans and Zacharias Janssen born?

    asked by Nunya
  78. chemistry

    I don't understnad why I got this question worng: The question asks given the following solubilities, calculate the value of the Ksp for the compound: Zinc carbonate, 3.87 x 10^-6 mol/L My answer: AnCO3 -----> Zn + CO3 There exists a 1:1 ratio between Zn

    asked by Jessica
  79. MATH

    Use the following information regarding the farm population(in millions of persons)from 1945 to 1990. Year 1945(24.3 millions of persons), 1990(4.4 Millions of Persons). a. Write a linear model for the farm population, y, in millions of persons. Let X=0

    asked by Gien
  80. physics

    6)Which of Newton's laws would best explain what causes a basketball to bounce? Third 7)Which of Newton's laws would best explain the whiplash caused by being rear-ended in a car accident? First

    asked by Jon
  81. physics

    8)If an airplane is moving at a constant velocity of 400 m/s for 20 s, what is its acceleration during this period? 0 m/s^2 b/c no change 10)You try to move a couch across the floor but it doesn't move. What is the other force acting on the couch? Static

    asked by Jon
  82. MATH

    how do you simplify square root of 27 minus square root of 49 all divided by square root of 3. I have gotten two different answers when I tried to check it. It kind of looks like (27-49) (3) except all the numbers have their own square root symbol. I don't

    asked by Casey
  83. math

    how would I solve for (2x-3/2)= (-x-1/4)

    asked by Cynthia
  84. ALGEBRA

    How do you find the domain of a function when the number is outside of the paranthesese. Example would be y=(square root of x)+3. I know that to find the domain when the number is under the square root, you have to make the number greater than or equal to

    asked by Casey
  85. Algebra

    To mulitply by each term inside parentheses is called what?

    asked by Taylor
  86. accounting

    Dr. Stephanie White, the Chief Administrator of Uptown Clinic, a community mental health agency, is concerned about the dilemma of coping with reduced budgets next year and into the foreseeable future, but increasing demand for services. In order to plan

    asked by Anonymous
  87. HUM

    What makes up the Hindu religion?

    asked by Laura
  88. history

    I am having a though time answering this ?. having to describe how the Cold War ideology that crystallized after WWII changes wartime alliances that had existed during the war?

    asked by Dehlia Silva
  89. precal

    logs 9^(2x-5)=27(x+4) and 3log(underscore4)(2x-1)=15 Thank you

    asked by Deb
  90. Algebra

    How do you find the domain of a function when the number is outside of the paranthesese. Example would be y=(square root of x)+3. I know that to find the domain when the number is under the square root, you have to make the number greater than or equal to

    asked by Casey
  91. algebra

    (8x-6) - (4x-5)

    asked by bb
  92. Pysical science

    What is the net magnetic force on a compass needle?

    asked by Rachel
  93. chemistry

    Just checking an answer... I was given Aluminum + Sulfur yields.. & I was to finish & balance & answer the questions. 2Al + 3S => Al2S3 If 1 mole of sulur reacts, how many moles of aluminum sulife are produced? .166 mol Al2S3 How many grams of aluminum

    asked by anna
  94. 7th grade math

    PV/nR=T find the value for n

    asked by Anonymous
  95. French Help

    How do u study for french

    asked by deja
  96. Algebra

    I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given

    asked by FCH
  97. AED 201

    Identify internal and/or external rewards that impact recruitment and retention of quality teachers. How do such rewards influence recruitment or retention? How might these rewards shift as new accountability-centered teacher reforms are proposed (such as

    asked by Dawn
  98. sensory abilites of the dog

    Please check my answer thanks Because dogs are pac animals, they prefer to eat A. Alone B. In the evening C. at dawn D. with others I said D

    asked by sarjh
  99. Science

    6C+O2=CO2 H2+Cl=HCL H+SO4=H2SO4 Cu+o2=CuO K+H20=K0H+H2

    asked by Louis Howard
  100. chemistry

    How much heat is absorbed by the calorimeter if the temperature change is 8C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

    asked by depressed
  101. chemistry

    Hi DrBob thank tou for your help so far its really inspiring I must say:) I have another question though:P Use the table to predict wheter a precipiatate forms if: 25.0 mL of 0.010 mol/L silver nitrate is mixed with 25.0 mL of 0.0050 mol/L potassium

    asked by Jessica
  102. Math

    Use the following information regarding the farm population(in millions of persons)from 1945-1990. Year 1945 1990 Millions of persons 24.3 4.4 a. Write a linear model for the farm population,y,in millions of persons.Let x=0 represent 1945. b. Use the

    asked by Danny
  103. physics repost

    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
  104. English expression

    What does he look like? He is heavy and tall. He looks like a heavy and tall man. What is he like? He is short and overweight. He is like a thin man. -------------------------- Are the answers and questions correct? Would you let me know suitable questions

    asked by John
  105. Chemistry

    I have a 7 mL solution with 3 mL of H2O added to the solution. How would I figure out the molarity of the solution?

    asked by TAG
  106. chem

    hydgogen and iodine form HI(g)per the reaction H2(g)+I2=2HI(g). If 2 L of iodine gas at .5 atm and 295 K react with excess oxygen, how many liters of HI at 295K and 1 atm will form?

    asked by bob
  107. History (Essay on the French Revolution)

    I am writing an essay on the French Revolution and I am in dire need of an interesting topic. What i'm looking for is something that wouldn't be obvious, not one of the main aspects. Anyone know what I mean?

    asked by Baphomet
  108. dog behavior

    please check my answer thanks Which of the following activites seems to be innate for dogs ? 1.Demonstrating gaze alteration 2. submitting to its owner 3. sending intraspecific signals 4. sending interspecific singals I say # 1

    asked by sarjh
  109. dog behavior

    please check my answer thanks true of false hackles up is an example of a signal I said true

    asked by sarjh
  110. math

    im doing angles and such...how can you find the measurements of all angles when you only know one measurement? for example: angle BOA=100 degrees now how would i find the other angle's measurements? i know about supplementary but is there a trick to use or

    asked by nicole
  111. Accounting

    A company has two major businesses that it operates. One business manufactures and sells unicycles for commercial use in circuses, etc. (total sales of $150M), and the other sells bicycles to the public (total sales of $20M). The unicycle business occupies

    asked by Anonymous
  112. dog behavior

    please check my answer thanks What benefit does an adult dog gain from being petted with long smooth strokes ? 1. The dog grows to be larger 2. The dog learns to be more dominant 3. The petting makes the dog physically stronger 4 The petting reduces stress

    asked by sarjh
  113. math

    2.8cm+2.8cm+3cm+3cm 1cm+10meters

    asked by Jordan
  114. History-Reconstruction

    What effect did Florida,Louisiana, and South Carolina have on the election of 1876?

    asked by Sue
  115. mount salem

    what is the meaning of calorie and under nutrition

    asked by sanci
  116. another pre cal (logs)

    write as a single log log(underscore3)(3x-6)-[log(underscore3)(x^2-4)+log(underscore3)81] thanks

    asked by Deb
  117. physics/chem

    (a) What equal positive charges (in Coulombs) would have to be placed on two celestial objects with masses 9.40 x 1027 and 1.99 x 1022 kg to neutralize their gravitational attraction? (b) What mass of hydrogen would be needed to provide the positive charge

    asked by dave
  118. chemistry

    I did a chemistry lab on polarimetry where we separated two enantiomers into individual salts and then used a polarimeter to determine the specific rotation and optical purity. What is the relationship of the proline salts to one another? i said that being

    asked by laura
  119. Algebra I

    Factor 20 x + 20y + 120

    asked by Patricia
  120. more pre cal logs

    sorry I am so lost I missed the class that talked about logs since my sister was in the hospital giving birth to a still born baby.... now I am all lost... Expand the log Ln 3sqrootx^2y/x+3 (the 3 is part of the sqroot not infront like the 3rd power) I

    asked by Deb
  121. English Grammar

    1. Let's find whether you have a booklet introducing your school or you classroom. 2. With what contents would you introduce your school or your class? 3. 'It's 37 years old' means that it has passed 37 years old since it was constructed. 4. We use old for

    asked by John
  122. Chem

    Which compound is the weakest base: a) aniline b) 4/para-bromo aniline c) 4/para-nitroanilinie d) 4/para-methylaniline Would "c" be correct??

    asked by K
  123. Biology

    The diploid form in a plant's life cycle is called what?

    asked by Mike
  124. Chem

    In conjunction with a standard hydrogen electrode, the La3+|La half-cell is the anode and the standard cell potential is 2.52V. What is the standard reduction potential for the La3+|La half-cell?

    asked by Ginger
  125. Chem

    Consider the following cell: Pt(s)|H2(g, p1)|H+(aq, pHA)||H+(aq, pHC)|H2(g, p2)|Pt(s) If the partial pressure of hydrogen gas is the same for both half-cells, what is E for the cell? a) 0.0296 log(pHA/PhC) b) 0.0296 log(pHC/PhA) c) 0.0592 (pHA - pHC) d)

    asked by Ginger
  126. ALGEBRA

    I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given

    asked by Casey
  127. science

    When graphing motion the steepness of the slope depends on

    asked by anony
  128. Science

    Mg+Hcl=MgCl2+H2

    asked by Louis Howard
  129. Language Arts

    How do you correct this sentence: In September me and him gots to start going to middle school.

    asked by Andy
  130. English

    Could someone read this paper for me and tell me if it is ok? It is the first time that I had to cite APA style and I wasn't really taught how to. I'm really not feeling confident about turning this in. Thanks Almost everyone lies, from a little white lie,

    asked by Emily
  131. Math

    Use the following information regarding the farm population(in millions of persons)from 1945 to 1990. Year 1945 1990 Millions of Persons 24.3 4.4 a. Write a linear model for the farm population, y, in millions of persons. Let X=0 represent 1945. b. Use the

    asked by GGe
  132. physics repost

    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
  133. Science

    What are the important dates in the history of the cell theory?

    asked by Pakkinee
  134. english

    how do you use the word halves in a sentence ?

    asked by adonis
  135. physics

    4)A bug is moving east at 1 m/s. A semi-truck is moving west at 45 m/s. They collide and the bug is splattered across the windshield of the semi and now travels west.At the point of impact, which of the following is true about the force of the bug acting

    asked by Jon
  136. Eth125

    Would the subject of gaming(such as casinos) be a current issue between Native Americans and the federal government?

    asked by Help Please
  137. History

    We have to do little projects. I need some ideas, im not very creative. 1)Write the "perfect" forged pass to get back into US History after ditching that class. any ideas?

    asked by MW
  138. science

    i need to know if there are any technologies that were developed from the knowledge of static electricity. I also need to know what kinds of jobs people have that use these technologies. thanks

    asked by riley
  139. dog behavior

    please check my answer thanks What is one social characteristic that both wolves and humans share which may have helped the process of domestication ? I think it i thr formatio of extended families

    asked by sarjh
  140. Physics

    "How can you tell the charge on the VanDer Graf generator is - ?"

    asked by TP
  141. drwls

    Thank you for your help, & for the website, makes for some interesting reading.

    asked by TJ
  142. english

    Could someone please provide me with reliable sites or comments to the following task: write an essay on the character of Aimee Thanatogenos in The Loved One by Evelyn Waugh and explain how Waugh uses her for his satiric purposes. Thank you!!

    asked by MM
  143. English

    Can someone please provide me with reliable sites on how to write an absurdist drama piece and more specifically relate it to Harold Pinter's style. Cheers

    asked by MAC
  144. Critical Thinking

    why and how could you apply critical thinking when evaluating articles, media, advertising, and conversations?

    asked by Kevin
  145. English

    List 3 examples of Kennings found in Beowulf.

    asked by Morgan
  146. Life Science

    If bacteria do not have organelles such as the nucleus, how is it they can still perform the functions of life?

    asked by MAF
  147. social studies

    i'm looking for 1st grade activities on the topic of rights and responsibilities

    asked by debbie
  148. Social Studies

    How did various inventions impact the economic development of differing areas of the country (North, South, and West)? Please help :)

    asked by jason
  149. algebra

    how do you do standard from linear equations

    asked by abby
  150. math

    how would i work this out sari has 7/12 yards of material does she have more or less than 8 yards of cloths?

    asked by angel
  151. math

    2e3 + 3e --------------------------------------... -5e � × � -15e2 + 20e --------------------------------------... 10e5 + 15e3 3e - 5 --------------------------------------... 5e 2(e - 2) --------------------------------------... 5e2 3e - 4

    asked by Francis
  152. physics EM

    WOW this problem is making me mad. I know force between two wires is mu*I1*I2*L/2pi*d. Ive used this and tried to find the magnitude but it says its wrong. What Am i doing wrong? I made sure to subtract the two forces one going up and one going down. There

    asked by Spencer
  153. Science

    6C+O2=CO2

    asked by Louis Howard
  154. Math

    Why is it important to follow the order of operations instead of solving from left to right?

    asked by will
  155. Math

    A recipe calls for 2/3 cups of green peppers. What would it be if you wanted to make half of the recipe?

    asked by Larry
  156. world civilization

    1 out of every 4 soldiers were killed in the civil war?

    asked by kristen
  157. Physical Science

    how many radians is -1.7 turns equivalent to?

    asked by Anonymous
  158. Physical Science

    How many radians is -1.7 turns equivalent to?

    asked by Anonymous
  159. literary

    What is "sound" in a literary terminology sense?

    asked by Josh