Questions Asked on
January 20, 2009

  1. Physics

    Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. What is the net gravitational force (magnitude and direction) on one of the masses, due to the other three? I think I have to separate the four masses

    asked by Jaime
  2. 8th Grade Algebra: Answer Check

    Find the length of the 3rd side of each right triangle. 1. 8^2+15^2=c^2 Answer: c=17 2. 5^2+b^2=13^2 Answer: b=12 3. 9^2+13^2=c^2 Answer: c~15.81 Simplify. Assume that all variables are nonnegative. { this means square root 4. {12 Answer: 2{3 5. 2{75

    asked by Joy
  3. chemistry

    Ca(s) + Br2(l) --> CaBr2 is synthesis my teacher also said that the cause of the reaction is stable electron configuration is that the same thing as the electrolytes one

    asked by lyne
  4. geometry

    If you had two triangles, triangle RST and triangle UVW, and in triangle RST angle R= angle S= angle T and in triangle UVW angle U= angle V= angle W, is there enough information to prove that the triangles are congruent? So each triangle is equiangular.

    asked by Anonymous
  5. trig

    (cotxsec2x - cotx)/ (sinxtanx + cosx) = sinx prove. i keep getting (if i start from the left side) = cosx instead of sinx please help!

    asked by Spencer
  6. spelling

    take 5 words and make a sentence out of it lets, school, out, at, for, four, let's Thanks

    asked by Anonymous
  7. physics

    A wheel of diameter 0.700 meters rolls without slipping. A point on the top of the wheel moves with a tangential speed of 2.00 m/s with respect to the ground. 1. If the wheel suddenly stops spinning and skis along the ground then a. v=rù b. v>rù c. v

    asked by bob
  8. 8th Grade Algebra: Answer Check #2

    Add or Subtract (Radicals) { this means squared 1.3{2 + 4{2 Answer: 7{2 2. 8{3 + 3{3 Answer: 11{3 3. 7{5 - 3{5 Answer: 4{5 4. 8{2 - 5{2 Answer: 3{2 5. 6{x + 7{x Answer: 13{x 6. 9{y + 3{y Answer: 12{y Multiply 7. -3x^2(4x^2-3x-5) Answer: 12x^2 8.(3b+5)(b-3)

    asked by Joy
  9. Pre-calculus

    Find the interquartile range and the semi-interquartile range of the following data: 42 51 53 53 59 61 75 100 mean=61.75=62 median=56 mode=53 interquartile range=87.5-52=35.5?

    asked by Mary
  10. Journalism

    Ok, I am writing two articles for my journalism class. We write the newspaper. So my first article is about what type of dog Obama is going to get for the white house and his kids. I talk about the two breeds of dogs they are choosing and a little about

    asked by Amy
  11. 9th grade

    How do you calculate the thermal amplitude

    asked by Mat
  12. Chemistry

    A 12.7 L sample of gas is under a pressure of 740 mm Hg at 20degrees C. What will be the volume of the gas if the pressure increases to 1.00 atm and the temperature drops to 0 degrees C

    asked by Mary
  13. physics

    A 72 g baseball rolls off a 1.5 m high table and strikes the floor a distance of .8 m away from table. How fast is it rolling on the table before it fell off?? Accel of gravity is 9.81 m/s2.

    asked by Bob
  14. 2nd grade math requestion post

    Okay, my child is doing problem solving lesson 5-7 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are: Clue 1: the number are between 70 and 82

    asked by Dawn
  15. Chemistry Lab

    We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 &

    asked by Shaniquaa
  16. Business

    Assume the role of a small business owner. You have little funds to put into insurance and protection for your company. You have to decide where your extra funds will be stretched. Is it more important for you as a business owner to protect your business

    asked by Will
  17. math

    Customers of a phone company can choose between two service plans for long distance calls. The first plan has an $18 one-time activation fee and charges 10 cents a minute. The second plan has no activation fee and charges 15 cents a minute. After how many

    asked by Geno
  18. chemistry

    Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 2.46 moles of CO2 react completely? moles

    asked by bob
  19. chem

    quantitative determination of acetylsalicylic acid in aspirin tablets by back titration 1)why do we use a more dilute NaOH solution for the standardization of NaOH? 2)what is the rationale behind the dilution and aliquoting of the aspirin sample? 3)what

    asked by krissy
  20. Chemistry

    Explain why the alcohol level in a thermometer rises when it is placed in a warmer fluid (#step process)

    asked by Mary
  21. calculus

    x^2 + y^2 = 25 3x + y = 15 Find the two points of intersection. I don't just want the answer, if you could tell me how to find it, it would save my life. The sqaure root is making it really hard for me to understand.

    asked by Nicole
  22. Human Geography (Religion)

    So I have to do a project on the Cultural Interaction in Religion. My religion is Sikhism. Here are the questions I'm supposed to answer in my presentation: How does the religion impact other aspects of culture? How does this religious faith influence the

    asked by Maddie
  23. precalc

    a 21-speed bike has varying top speeds dependent on the gear it's in. the bike's tire diameter is 26 inches. the bike can pedal at a maximum of 130 revolutions per minute. the front chain wheel has sprokets of 24, 32, and 40 teeth. the rear cassette

    asked by syd
  24. Pre-calculus

    Find the first three iterates of the function f(x)=x^2-2, if the intial value is -2. z(0)=-2 z(1)=(-2)^2-2 or 4-2=2 z(2)=(2)^2-2 or 4-2=2 z(3)=(2)^2-2 or 4-2=2 Answer: z(1)=2, z(2)=2, z(3)=2

    asked by Liz
  25. writing sentences and paragraphs

    you've applied for a specific job in your field of study .The human resources department arranges an interview and tells you to bring a polished piece of writing for them to evaluate your writing skills

    asked by tara
  26. Pre-calc, Algebra, Trig

    (2x squared-3x +1)(4)(3x+2)cubed (3)+(3x +2)raised to the 4 (4x-3) Simplify

    asked by Josiah
  27. precalc

    a 21-speed bike has varying top speeds dependent on the gear it's in. the bike's tire diameter is 26 inches. the bike can pedal at a maximum of 130 revolutions per minute. the front chain wheel has sprokets of 24, 32, and 40 teeth. the rear cassette

    asked by syd
  28. Chem

    i don't get this ?.......If the weather forecast stated that the pressure is 104.2kpa. then what is the pressure in the atmosphere? and what would a barometer measure in mm of mercury need help please

    asked by Z
  29. Algebra

    What is the length of the interval of solutions to the inequality 1 ( is less than or equal to) 3-4x (is less than or equal to) 9? I presume that I just plug in numbers for x? The problem is, that all the positive numbers I've tried have made them way less

    asked by Elle
  30. math 116

    can you help me explain this one? 9 + 6 x (8 - 5)

    asked by meshelle
  31. physics

    person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the

    asked by bob
  32. social help

    How does major religion affect culture?

    asked by Anonymous
  33. global history

    what role did the king play in religion in ancient Isreal?

    asked by Anonymous
  34. English

    So I'm working on an english paper but I've been stuck the past hour on what to do. I'm trying to take my teachers advice by putting in an anaphorism (repeated words or phrases)but I'm having trouble. I'm repeating the phrase "eight months" but I'm stuck

    asked by Lauren
  35. AED / ASAP PLEASE

    this is my DQ 1: What are some factors that contribute to the disproportional representation of minority students in special education classes? Explain your answer. here is the scenerio and the question # 1 I need to answer:Riley Behler, a third-grade

    asked by troyer0269
  36. math

    a glass of ice tea cost two dollars. Refills cost 25 cents each. write the rule in function notation. is it F(x)=2+.25x? If it is wrong can you help

    asked by malik
  37. English-Jane Eyre

    This is a book review that I have wrote for Jane Eyre by Charlotte Bronte. Could you please check if I have any obvious mistakes and give me a comment for this? Or a grade out of 20? 1. Title: Jane Eyre 2. Author: Charlotte Bronte 3. Genre: Romance,

    asked by Abigail
  38. physics

    a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the

    asked by bob
  39. 5th grade

    on the periodic table what has 4 neutrons and is a metallic

    asked by sam
  40. 3rd grade

    alice folded a piece of paper into 12 equal squares and colored them. She had 3 times as many red parts as green parts and 2 more yellow parts than blue parts. How many parts did she have of eeach color?

    asked by tee
  41. math

    how far is it from California to colodrado?

    asked by leah
  42. Math

    Solve 4sin^2x + 4(squareroot of 2)cosx -6 for all real values of x.

    asked by Joanie
  43. 3rd grade math-help

    It say set 12: subtracting 2; differences of 2. A triangle has a 3 on top and a 2 on the left bottom?

    asked by mia
  44. algebra

    Can anyone answer these? 3/12 + 3/4x 4/(x + 3) * 3x/8 4x/15 ÷ 12x/3 13/(4x) * 16/39 (3/2)x + (5/2) 9/(4xa) - 3/4

    asked by Shanna
  45. U.S. History

    please check these,my answers are in CAPS 1.Europeans fought the Crusades a. to establish new trade routes to the Indies b. to put limitations on European trade C. TO TAKE CONTROL OF JERUSALEM FROM MUSLIM TURKS d. to convert Muslims to Christianity

    asked by y912f
  46. global

    What did ancient Hebrews need to do to please their god?

    asked by Anonymous
  47. Math

    I have two problemson polygonal convex sets which I do not understand. The first: Find the minimum value of f(x,y) = 2x-y+2 for the polygonal convex set determined by this system of inequalities: x is more than or equal to 1 x is less than or equal to 3 y

    asked by Joanie
  48. English

    What is the possesive form of the word seashells

    asked by Glenda
  49. physics

    a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the

    asked by bob
  50. Accounting

    Classify the following Users of information as either: Internal User External User; trading partner External User; Stake holder 1) IRS 2) Inventory control manager 3) Board of Directors 4)Customers 5) Lending Institutions 6)SEC 7) Stockholders 8) CEO 9)

    asked by Peter
  51. Pre-calculus

    Find the quotient 3[cos5pi/12+isin5pi/12] divided by 6[cospi/12+isinpi/12]. Express the quotient in rectangular form. I worked it out as: 1/2[cospi/3+isinpi/3] =1/2(1/2+1/2i) =1/2+1/2i Is this right?

    asked by Mary
  52. english

    would the verb in this sentence be transitional or intransitional. if transitional, what would be the object? She threw a wonderful celebration.

    asked by alli
  53. English

    Edgar Allan Poe Biography Please Check!! (teacher limited to be 3 paragraphs only. Please check my sentence fluency, grammar, and point out any unimportant points of his life.) Edgar Allan Poe was born in Massachusetts, Boston, on January 19, 1809. His

    asked by Jennifer
  54. college

    1. Solve. 2x+3y+4z=2 5x-2y+3z=0 x-5y-2z=-4 A. (3, 4, 2) B. (-2 ,1, 2) C. (2, 2, -2) D. (1, 1, -2)

    asked by Sharnell
  55. chemistry

    i did a lab and found that of the products two gases were formed H2 and H2CO3 the question is... What are the tests that will verify the identity of these gases? what is this asking?

    asked by lyne
  56. science

    how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an

    asked by erin
  57. english

    I need help rewriting this sentence. There has been an ongoing controversy in Canada on whether the drinking age should be lowered to eighteen like most of the world (Russia, Argentina, Hong Kong, etc.) or if it should stay at nineteen. using this

    asked by Maria
  58. Chemistry-please help

    The relative mass of a proton is 1 and the relative mass of a neutron is 1. 1)Why do we use the term "relative mass" instead of mass? Is it because the mass of a proton is compared to the mass of a carbon-12 atom? 2) Can we say that the relative mass of an

    asked by janice
  59. college

    How others view a person can influence how that person views his or her environment and those in his or her environment

    asked by Anonymous
  60. english

    Hi, can someone please revise my essay. I'd really appriciate any sugestions. There has been an ongoing controversy in Canada on whether the drinking age should be lowered to eighteen like most of the world (Russia, Argentina, Hong Kong, etc.) or if it

    asked by Maria
  61. Math

    Prove the identity. sin² θ = tan² θ / 1 + tan² θ

    asked by Jillian
  62. math

    the pass code to mrs.kyles alarm system is 6 digits.each can be from 0 - 6 and can only be used once.how many different combinations can mrs.kyle come up with?

    asked by lisa
  63. math

    x = 3 - y^2 y = x - 3 Find the points of intersection. If someone could even get me to the point where it gets written in general form (both equations set to 0..) I would be forever grateful.

    asked by strawerryfields
  64. 3rd grade math

    It say set 12: subtracting 2; differences of 2. A triangle has a 3 on top and a 2 on the left bottom?

    asked by mia
  65. geometry

    Mr. Rose wants to install wall-to-wall carpeting in his living room. The carpeting will cost $15.50 per square yard, the padding will cost $3.50 per square yard, and the installation is $2.50 per square yard. What will it cost him to carpet the living room

    asked by los
  66. chemistry

    NaCl + CuSO4 to write the product would i just do double replacement to get Na2SO4 + CuCl2 so the whole thing would be 2NaCl + CuSO4 --> Na2SO4 + CuCl2

    asked by lyne
  67. english

    the term freewriting refers to?

    asked by san
  68. global

    how did the ancient Hebrews maintain their religion as they traveled from place to place?

    asked by Anonymous
  69. U.S. History

    Explain how the issues of "Gold, Glory and God" influenced not only the colonizing activities of Spain and England but also the economic gain and glory for all individuals involved.

    asked by y912f
  70. college

    all records in a file must be uniquely identiied in at least one attribute which is its primary key. identify primary key Record Type: Accounts payable Inventory Customer Sales Orders Purchase Orders to Vendors Cash Receipts (checks) from Customers Cash

    asked by Accounting
  71. physics

    Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks

    asked by Bob
  72. college Accounting

    Classify the following Users of information as either: Internal User External User; trading partner External User; Stake holder 1) IRS 2) Inventory control manager 3) Board of Directors 4)Customers 5) Lending Institutions 6)SEC 7) Stockholders 8) CEO 9)

    asked by Peter
  73. social studies

    how does the presence of top carnivores indicate that an ecosystem is healthy

    asked by diego
  74. computers

    I have this problem with my PC The sound won't function properly. I've checked the volume controls and audio properties, etc, but they seem to be working fine. It's just that the sound won't come out. I've also tried installing a new set of speakers, yet

    asked by Mark
  75. science

    Explain what would happen to the animals and plants in a saltwater ecosystem if it were flooded by fresh water?

    asked by Deja
  76. College math

    A planehas 7 hrs. to reach a target and come back to base. it flies out to the target at 480 miles per hr. and returns on the same route at 640 miles per hour. how many miles from the base is the target?

    asked by Kim
  77. science please!

    Estimate the value of the cell potential for the following rxn: Mn02(s) + 4H30+(pH=3.8) + 2Ag(s) --> Mn2+(aq, .1M) + 6H20(l) I got Ecell=.48V delta G circle= -92640 J/mol and delta g = -107484 is this correct?

    asked by erin
  78. math fraction word problem

    Betty needs to stack boxes 13 3/4 inches tall. The ceiling is 16 feet. How many can she stack?

    asked by Melissa
  79. math help

    Solve for t: 4 6 -- = -- t+3 1-2t

    asked by Anonymous
  80. math

    How can you tell if a number is a multiple of 6?

    asked by ryan
  81. 2nd grade

    Okay, my child is doing problem solving lesson 5-7 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are: Clue 1: the number are between 70 and 82

    asked by Dawn
  82. MATH116

    I'm not to sure about this but would it be written in this form: 2x + 4=6? Let me know if this is correct or not, I'm terrible with Algebra.

    asked by meshelle
  83. law and ethics

    Compare and contrast contributory negligence with comparative negligence

    asked by Anonymous
  84. y912f

    Consumers can encourage manufacturers to keep their operations in the United States by buying only American-made products. Do you want to buy only products made in the United States(NO). Write a five paragraph essay defending your position. i just need

    asked by y912f
  85. social studies

    which religion began in the middle east shintoism, hinduism, judaism or buddhism

    asked by gunji
  86. English

    In these two sentences, I'm not sure where to put the apostrophe to make it a plural possessive noun. We were excited to see the (children) photographs. The pictures looked like real (photographer) pictures.

    asked by Sylvie
  87. marketing

    Consider a recent purchase that you or a family member has made (examples: a household product, a DVD or CD, a grocery item, an electronic device, etc.) Describe the item and list three main reasons you purchased that product as opposed to another product.

    asked by jay jay
  88. Point Slope Form Algebra

    What is the difference between Y1=MX1+B and Y=MX+B

    asked by Rachel
  89. social

    how beliek system spread over large areas?

    asked by Anonymous
  90. Julius Caesar

    In Act II scene iv of Shakespeare's Julius Caesar, what is wrong with Portia?

    asked by Anonymous
  91. science

    I need a really cool unusual idea for my 5th grade science fair project - any ideas would be appreciated. Thank you,

    asked by sydney
  92. BEH 225

    What areas of psychology gained a positive outcome from the discovery or use of some of the psychological medications used and why?

    asked by Deb
  93. English

    What is an analogy?

    asked by Lori
  94. Chemistry Lab

    We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 &

    asked by Shaniquaa
  95. accounting

    how do i calulate my ss witholdings from my paycheck? i know its 6.2% of my earnings. So if i made 551.65 for the year i would take 551.65*6.2% and subtract that answer from the 551.65?

    asked by ask
  96. history

    who was the 3 priesident of th u.s

    asked by mario
  97. science

    IS IT RIGHT TO MAKE CHANGES TO THE QUALITIIES OF HUMANS!

    asked by lol
  98. math

    identify the independant and dependant variables. A photo lab charges 15 cents per print.

    asked by malik
  99. ecology

    what is a stamen

    asked by momo
  100. English-Repost

    Hello! English is my second language, and at the moment, unfortunately, I don't have anybody who can read my paper since both my parents are not fluent in English. And I'm probably living on the other side of the earth, since it is now ten thirty pm.

    asked by Jennifer
  101. science

    what would happen tp animals and plants in a saltwater ecosystem if it were flooded by fresh water?

    asked by Deja
  102. Math-Algebra

    [SQRT(x + 3)] - [SQRT(x - 2)] =1 Can someone help me solve this equation.

    asked by Mike
  103. earth science

    what do two of the stars in the bowl of the big dipper point to ?

    asked by Eddie
  104. Chemistery

    An aqueous solution of calcium chloride contains 2 g of calcium chloride (molar mass 110.98 g mol-1) in 100 ml. Calculate the concentration of chloride ion in the solution any help their

    asked by Slaysliver
  105. spanish

    which of these is right? wouldn't they both be? 1. no se aburría nadie. 2. no me aburría nadie. thanks so much :)

    asked by chrissi
  106. Business

    Would it be easier to defend a case regarding real property or intellectual property?

    asked by Will
  107. math

    ã49 + ã343 - ã2401 = please help me solve

    asked by Julissa
  108. math

    y= a*tan pi/p (x-c)+d what letters represent the following domain: range: asymtotes: period: p phase shift: c vertical: d I can't figure out the rest

    asked by Sh
  109. math

    How to solve this quadratic equation by factoring? 10x2 - 19x -15 = 0

    asked by JoAnn
  110. Another algebra

    Determine the number of positive integers n that satisfy: 1/2 < n/n+1 < 99/101 I don't know how to solve this besides plugging in random numbers, which would take all day. Any other suggestions for a faster way to solve it? Thank you!

    asked by Elle
  111. Social Studies

    What is George's Bush policy on science?

    asked by Peter
  112. math

    John is making a bookcase that is 72 3/8inches tall, he wants 5 equally spaced shelves. Eacg self is 3/8 inche thick. tell him where to drill the holes.

    asked by Lou
  113. Social Studies

    What is a right action; good quality? We are learning about India, and I'm not sure what it is asking here.

    asked by Joe
  114. social studies

    what is a symbol used in writing?

    asked by abby
  115. Fractions

    __ Change 1.01 to a fraction Book says answer is 100/99. not clear why?

    asked by G
  116. Chemisty

    The relative electric charge of a proton is +1, the relative electric charge of an electron is -1 and that of neutron is 0. What is electric charge and why is it relative? Thank a lot.

    asked by janice
  117. math help needed

    Solve for t: 4 6 -- = -- t+3 1-2t

    asked by Anonymous