Questions Asked on
October 8, 2007

  1. chemistry

    what is the formula for cobalt (III) chloride and sodium hydroxide

    asked by Nannette
  2. Chemistry

    If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process.

    asked by Raj
  3. Physics

    A Stubborn, 120 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around the pulls with his maximum force of 800N. The coefficients of friction between the mule and the ground are Us=0.8 and Uk=0.5. Is

    asked by Anonymous
  4. Variation-Check Problems

    Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. -I got: f=kbc^2 22. r varies jointly as the square of s and the square of t. -I

    asked by Soly
  5. Physics

    A uniform steel beam of length 5.50 m has a weight of 4.50 103 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an

    asked by Student
  6. math

    i don't really know how to go about anwsering this problem: the weight of the eggs produced by a certain breed of hen is Normally distributed with mean 65 grams and standard deviation 5 grams. think of cartons of such eggs as SRSs of size 12 from the

    asked by Devon
  7. Pre-Algebra

    If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule??? Also, what is the pattern in the informatio above???

    asked by Ellen
  8. Physics

    A 31.8 kg child swings on a rope with a length of 6.12 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.2 m/s. What is the tension in the rope?

    asked by Dante
  9. Variation

    I have few questions that I need checked please and could you help me with the last question? Write an equation that expreses the relationship. Use k as the constant of varaiation. 1. s varies directly as h -I got: s=kh 2.a varies directly as the square of

    asked by Soly
  10. Language Arts

    I don't know why authors use figurative language. Can you please help? Thank you! :)

    asked by Sonic
  11. science(chem)

    I was told before that it takes 2 mol of fluorene to be reduced by 1mol of sodium borohydride.... How many mg of fluorenone can 0.53 mol of sodium borohydride(NaBH4) reduce? what I got... 0.53mol NaBH4 ( 2mol fluorenone/ 1mol NaBH4)(180.192g/1mol

    asked by ~christina~
  12. Physics

    A uniform steel beam of length 5.50 m has a weight of 4.50 103 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an

    asked by Bourne
  13. Chem

    Question: "Calculate the theoretical yield of calcium carbonate of you react 2.55g of calcium chloride dihydrate with an excess amount of sodium carbonate." I got the molar mass of calcium chloride dihydrate which is 131.015 g/mol, but Im not sure how to

    asked by Jenna
  14. Chemistry

    Suppose a piece of lead with a mass of 14.9g at a temperature of 92.5 degrees C is dropped into an insulated container of water. The mass of water is 165g and its temperature before adding the lead is 20.0 degrees C. What is the final temperature of the

    asked by Lucy
  15. Physics

    At the instant a traffic light turns green, a car starts moving with a constant acceleration a of 3.05 m/s^2. At the same time a truck, traveling with a constant speed of 10.15 m/s, overtakes and passes the car. How far beyond the traffic light will the

    asked by Lindsay
  16. Physics

    A uniform plank of length 5.1 m and weight 235 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 458 N walk on the overhanging part of the plank before

    asked by Student
  17. Chemistry

    Atom-Particle that cannont be divided in half becasue it is in its smallest form. Reactants-Substances that exist before the reaction begins. Endothermic Reaction-take in, or absorb heat energy. Exothermic Reaction- Release Heat energy Inhibitor-makes a

    asked by Tom
  18. English

    Hi there. I'm from Poland and I'm studying English. I need some help with a True/False exercise. There's a piece of text and there's a question below it and you need to answer it with true or false. My query is especially aimed at English Teacher's and

    asked by Kate
  19. chemistry

    No precipitate formed when an aqueous solution of NaCl or Na2SO4 was added to the sample solution. A precipitate formed when the sample solution was made basic with NaOH. Which ion(s) are present in the sample soluiton? [Hg2]2+ [Ba]2+ [Mn]2+ I know that

    asked by Christie
  20. Pre-Algebra

    If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule??? Tables: X: -20 -15 -10 -5 0 5 10 15 20 Y: 168 153 138 123 108 93

    asked by Ellen
  21. Precalculus

    The light pattern from a fog light at the airport can be modeled by the equation x^2/4 - y^2/16=1. One of the points on the graph is at (3, 4.5) and one of the x-intercepts is -2. Find the coordinates of the three addditional points on the graph and the

    asked by Alicia
  22. Calculus

    55. Find an equation of the tangent line to the graph of f(x) =x^3 - 2x + 1 a) at (2,5); b) at (-1,2); c) at (0,1). I believe the answers are: a) y= (3/2 x) - (3/2) b) No solution c) No solution For each function, find the points on the graph at which the

    asked by Robert
  23. science research

    for my science project i have a research project report due tomorrow. can somebody please help me find atleast three reseach web links that can help with what i am searching about, how does color effect taste preferences or does color effect taste

    asked by shivangi
  24. Chemistry

    Kim and Al need to determine the actual mass of lead(II) sulfate in grams that formed when 1250.0mL of 0.0500 M lead(II) nitrate was mixed with 0.2000 kL of 0.0250 M sodium sulfate. When the experiment was completed Kim determined that they had a 67.5%

    asked by Fred
  25. Pre-Calc

    Could somebody please check this for me? Dtermine whether the graph of each equation is symmetric with respect to the origin, the x-axis, the y-axis, and the line y=x or the line y=-x. I came up with the line being symmetric to the x-axis, the y-axis, and

    asked by Natalie
  26. Math

    Could someone please help me out with the data homework? All I need is someone to check my answers. If any are incorrect could you please explain what I did wrong. 1. A student must answer 7 of 10 questions on an exam. How many different sets of questions

    asked by Ashley
  27. Math

    A rectangle has a width if 10 inches and an area of 5 square inches. What is the length of the rectangle?

    asked by Jacob
  28. PreAP English Grade 10

    Ok. I am having major problems with the homework questions about King Arthur. Does anyone want to help me?

    asked by Michele
  29. science(chem)

    For the reaction: acetic acid (2g) + Isopentyl alcohol (0.9g) => Isopently acetate(1.15g)+ H2O I'm suposed to determine the limiting reagent, theoretical yield and percent yield from this reaction but the reaction was given as a picture... I'm not sure

    asked by ~christina~
  30. Physics

    Can you tell me if there is a formula to find out the wind pressure on the sides of a roof in different areas of the roof with different pitches. Thanks Nick

    asked by nick
  31. chem

    which of these substances dissolve in water? and are they elements or compounds? copper nitrate sodium hydroxide copper hydroxide copper oxide hydrochloric acid aluminum copper chloride hydrochloric acid

    asked by Sar
  32. Physics

    1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it? Do I use F=ma so then m=707 and a=42/3 which is 14. So m=707 and a=14 and I

    asked by Lee Kite
  33. math

    find the measure of each angle of a triangle whose exterior angles, one at each each vertex, have the measure 2x+10, x+20, and x+30

    asked by anonymous
  34. Math

    in triangles PQR, m

    asked by anonymous
  35. biology

    what are the five basic things to survive? I have water, food, shelter, and air but I am stumped on the last one please help!!!!

    asked by Nora
  36. Algebra 1

    I don't understand this question AT ALL. The length of a rectangle is 5 meters greater than the width. The perimeter is 150 meters. Find the length and width of the rectangle.

    asked by Sonic
  37. Chemistry

    5.000g / 2.5mL = ?

    asked by Lucy
  38. Managerial Economics

    The following relations describe the supply and demand for posters. Qd = 65,000 – 10,000 P Qs = -35,000 + 15,000P Where Q is the quantity and P is the price of a poster, in dollars. a. Complete the following table. Price Qs Qd Surplus or Shortage $6.00

    asked by Eric
  39. geography

    What is a circulating current of warmer material

    asked by hhhhheellpppppppppp
  40. PHYSICS

    A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt) *d means derivative

    asked by jess
  41. physics

    Which truck has more momentum?? 20kg*m/s or 20000kg*m/s??? HELPPP!!!

    asked by lexi
  42. Pre-Algebra

    Ragweed pollen has a diameter of about 2.3x10(exponent -5)meters. Under a microscope the pollen appears to have a diameter of 2.3x10(exponent -2) meters. how many TIMES larger is the magnified image under the microscope?

    asked by Alicia
  43. Math

    Please HELP Me!! A googol is a number written with a 1 followed by 100 zeros. Write a googol in scientific notation. I don't understand this. Thank You.

    asked by Happy face!!
  44. Variation-Questions

    I have some questions that I don't understand and need to be checked please? Slove the problem. 1. y varies directly as z and y=187 when z=17. Find y when z=15 -This is how I did it: 187=k*17, I divided by 17 on both sides and got k=11, then I plugged it

    asked by Soly
  45. english/science

    What actually caused the Titanic to sink?

    asked by hellppppp
  46. math

    if 1.5 teens eats 1.5 pizzas in 1.5 hours, how many pizzas can 9 teens eat in 6 hours? How do I do this problem, not just the answer. Thanks

    asked by Anonymous
  47. Literature(Legend of King Arthur)

    Discuss whether the legend of King Arthur has (or has not) made an impact on popular culture.

    asked by Christian
  48. Chemistry

    A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL.

    asked by Raj
  49. english

    why do you capitalize the seasons in some sentences but in others you dont?

    asked by amanda
  50. Math

    I have a silly question: Is there anything smaller then a mm? i can't remeber

    asked by Dawn
  51. science(chem)

    Consider the following errors that could be made when running the TLC. Indicate what should be done to correct the error. a) A 2 component mixture containing 1-octene and 1,4- dimethylbenzene gave only 1 spot with and Rf value of 0.95. The solvent used was

    asked by ~christina~
  52. physics

    A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt)

    asked by jess
  53. Math

    Joel has $20. he needs a calculator that costs $12 and some notebooks that cost $2 each. Write an inequality that can be used to find the number of notebooks, n, that Joel can afford to buy.

    asked by Jasmine
  54. Math

    Ragweed pollen has a diameter of about 2.3x10(exponent -5)meters. Under a microscope the pollen appears to have a diameter of 2.3x10(exponent -2) meters. how many TIMES larger is the magnified image under the microscope? I don't get it! What do u have to

    asked by Alicia
  55. social studies (history)

    When was the american constitution written?

    asked by Shivangi
  56. Social Studies

    In what present-day states do the Cheyenne live?

    asked by Laurie
  57. math

    solve each formula in terms of the givin variable 5d-2g=9;g

    asked by Anastasia
  58. physics

    what happens to the acceleration (of a ball going around in a circle tethered to a string) if: 1) radis of the circle halves and the period of rotation stays the same 2) the peiod of rotation halves and the radius stays the same 3) the period doubles and

    asked by frustrated
  59. Chemistry

    What the difference between an orbit in the Bohr model and an orbital in the quantum mechanical model of the atom?

    asked by Matthew
  60. Chemistry

    What are the 3 rule the govern the filling of atomic orbitals by electrons?

    asked by Matthew
  61. Math

    Each year (365 days) the fire department receives 270 emergency calls on average. In a give 7-day week, what is the probability of receiving A. no calls b. more than one call c. one call or less d. at least two calls please help and show me some work or

    asked by Curious Student
  62. Math

    This year, the advertising budget of the park committee is 12% more than it was last year. If the advertising budget is $300 more this year, how many dollars was the budget last year? PLEASE HELP I DO NOT KNOW WHAT TO DO!!!

    asked by Samantha
  63. Chem - DrBob222 & drwls

    Just want to say thanks to you guys for the help you gave me during the last couple of months. It was all in preparation for the National Chemistry Test and I just received word I have been selected to be in the running for the National Chem Team. Thanks

    asked by Vic
  64. english/science

    How far down is the Titanic? How far apart are the 2 large pieces of wreckage?

    asked by hellppppp
  65. social study

    Why were George Washington's troops jubilant on March 17, 1776?

    asked by nana
  66. math

    Find a formula for the following functions: x -2 -1 0 1 2 3 4 y 0 3 4 3 0 -5 -12 x -4 -3 -2 -1 0 1 2 3 4 y 25 16 9 4 1 0 1 4 9

    asked by Ali
  67. chemistry

    With the hydro carbon azulene it has a very large dipole moment and is an intense midnight blue color. Why is it such a deep blue and have a large dipole?

    asked by melissa
  68. same as before

    the question is How did Geoffrey of Monmouth's and Chretien de Troyes works contribute to the legend of King Arthur? How did their stories help develop the ideals of Chivalry? Explain. ah! HELP!

    asked by Michele
  69. science

    how is melting point connected to science? how is melting point connected to math? how is melting point connected to the world? how is melting point connected to you? why is melting point important?

    asked by anonymous
  70. Mental math

    In a certain company 30% of the men and 40% of women attended the annual company picnic,If 25% of all the employees are men,what % of all the employee went to the picnic?

    asked by Rosy
  71. 215 written communication

    Since I started taking college classes

    asked by Marilyn Green
  72. math

    what fraction of the numbers from 1 to 1000 have the digit 7 as the least one of the digits

    asked by Anonymous
  73. math

    make a magnitude estimate.269x42= 10,100,1,000,10,000

    asked by malik
  74. Exam skills

    Hello I'm a grade 10 student . I'm an A* student and have excellent knowledge. I raise my hand in class and teachers love the way i act maturally and how i get all questions right each time The problem with me is I get everything right in class but when it

    asked by AMY
  75. English grammar

    1. You should memorize subject names. 2. He taught us in the first perion. 3. We can find the articles at the CNN website. Are the English sentences are all grammatical? If there are any mistakes, would you correct them?

    asked by John
  76. written communcation

    She drove the car right in the garage

    asked by Marilyn Green
  77. Physics

    A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt) *d for derivative

    asked by jamie
  78. English

    Use of a OR an. It is ccorrect to say/or write "a Royal Yachting Association course..." But if we choose to abbreviate to RYA is it correct to use: "a RYA ...." OR "an RYA ...." Thanks Mike

    asked by Mike
  79. CHEMISTRY

    What experimental observations can support the theory that there is restricted rotation about double bonds?

    asked by Del
  80. English Grammar

    1. The size and the length are decided by school rules. 2. The part on which the stick is used is decided by school rules as well. 3. How do you discipline problemed students? -------------------------------------- Are the expressions grammatical? If not,

    asked by John
  81. Social Studies

    How do I find information on the internet about things like what is the sole right to trade in an area. Im doing a crossword and ive already looked in the book. Some other questions are A colony leader. Colonists sent to the americas by judges. What king

    asked by Emily
  82. Science Repost for Tina

    english/science - Tina, Monday, October 8, 2007 at 9:30pm Who discovered the digestive system?

    asked by Ms. Sue
  83. Science - bio.

    Why does the nucleus of a plant cell in the side of the cell ?

    asked by Mandch
  84. Math

    How are 2 hours and the distance traveled in 2 hours represented on the table? On the graph?

    asked by Courtney
  85. math

    If you put all 720 permutations of the digits 1 through 6 in numerical order from least to greatest (ex. 123456, 123465 etc.) What would the 409 permutation be? How do I do it?

    asked by anonymous
  86. Algebra

    Ok a few questions I want to check answers on - -x+4-9x+3¡Ý 7(x-2) -10x+7¡Ý7x-14 -10x-7x¡Ý7x-7x-14 -17x¡Ý-21 -17x/-17¡Ý-21/-17 x¡Ý21/17 or x¡Ü21/17 ?? One I do not understand at all - The linear equation y=3x-5 graphs as a

    asked by John
  87. biology

    if you put a small drop of dye in a jar of water would the diffusion be faster or slower than if a larger drop was put in

    asked by pheobe
  88. Science

    What is better to build a boat that has to be 7inches max. wide and 7 inches max. long and has to hold at least 10 large marbles out of... Wood or Styrofoam???

    asked by Samantha
  89. Math

    Can you please help me figure out how i go about figuring the following problem? .... A farmer has both pigs and chickens. There are 78 feet and 27 heads. How many pigs and how many chickens are there? ..... I am not sure what to do to figure it out.

    asked by Dylan
  90. Math

    what is the solution set of : x^2 + 9 = 0

    asked by Amy
  91. math

    if you were to put 128 mm into cm, it would be 12.8 right?

    asked by Dawn
  92. Spanish

    How do you say "to stand"?

    asked by Michele
  93. Religion

    What do catholics do to live up to their name as "catholic"?

    asked by Amber
  94. math!

    there are 100 cm in a meter...right?

    asked by Dawn
  95. Science

    What is the difference of Kinetic and Potential Energy???

    asked by Soraya
  96. chemistry

    Hi can you help me with the following question. I don't understand how to answer the question. If someone could tell me the answer for part a of the following sample problem, i would most gladly appreciate it.

    asked by manny
  97. Physics

    In a P-T graph, does time always have to be on the x-axis(bottom)?

    asked by Mandee
  98. Science

    What is a detailed explanation of Kinetic and Potential energy

    asked by Soraya
  99. Math

    Joel has $20. He needs a calculator that costs $12 and some notebooks that cost $2 each. Part A: Write an inequality that can be used to find the number of notebooks,n, that Joel can afford to buy. 12+2n ≤ 20 PART B: What is the graetest possible value

    asked by Jasmine
  100. Math

    Joel has $20. He needs a calculator that costs $12 and some notebooks that cost $2 each. Part A: Write an inequality that can be used to find the number of notebooks,n, that Joel can afford to buy. 12+2n ≤ 20 ***PART B: What is the graetest possible

    asked by Jasmine
  101. math

    (x+1)(x-1)=5(x-1)

    asked by Anonymous
  102. spanish

    How did Europeans transform life in argentina and Chile? Please help me. Thank you.

    asked by lindsey
  103. Math

    According to a recent study, 46% of all adults have back problems. If 7 adults are randomly sampled, what is the probability hat 0-7 of the adults have back problems?

    asked by Curious Student
  104. Life Science

    What land animal is not a species?

    asked by Jordan
  105. English

    I don't understand this poem. Well, I understad the first part until she starts talking about the blood on her sheets and then I am lost. I have to do a presentation where I just talk about what the poem is about and then I have to ask the class some

    asked by Nicole
  106. science

    How might sand form in nature?

    asked by astrid
  107. history

    Who is the only woman currently on the U.S. supreme court?

    asked by Mandee
  108. Law

    How will law affect health care and human service organizations?

    asked by Michelle
  109. Calculus!!!

    the derivative of cot^3sqrtx Do you use prduct rule, if so what is your u,v, dv, or du.

    asked by Matt
  110. chemistry

    what chemical properties of the nitrogenous bases contribute to stability of DNA?

    asked by emi
  111. science

    what is the process called when a plant can alternate between sexual and asexual reproduction

    asked by MaKayla
  112. mult.

    what is: 9,436 x 7 ------

    asked by Jacob
  113. Law

    I am having a hard time and very pressed for time. Thanks in advance;) Select a current or proposed law that impacts the delivery of health care or human services. „FƒnWrite a 1,050- to 1,400-word paper in APA format that answers the following

    asked by Need help before midnight...help
  114. history

    who is the senator from Illinois trying to get democratic nomination? I tried googling it, and got a variation of answers

    asked by Mandee
  115. history

    Who is the current leader of Russia? Is it Victor Zubkov or Vladmir Putin?

    asked by Christie
  116. Science

    What are some problems that can arise when using recrystallization in an experiment? One could be not using the appropriate solvent... any other suggestions? Thanks ahead of time.

    asked by Meche
  117. health and human service

    can anyone give me some ideas on the greatest concerns on the current state of human and health service workers industry?

    asked by alley
  118. language/reading

    how do you do a character continuum? ex. good/evil

    asked by jordan