Questions Asked on
February 3, 2010

  1. organ chem

    Using the volume 1.42mL of 95% ethyl alcohol that's required to dissolve 0.3g at 78 C, how do i find how much sulfanilamide that will remain in the mother liquor after the mixture is cooled to 0 C? (at 0 degrees=14mg/mL is the solubility) thanks

    asked by j
  2. math

    a heavy freight train made a trip of 360 miles, running part of the distance at 54 miles an hour and the rest at 48 miles an hour.if the entire trip took 7 hours,find the distance traveled at each rate.

    asked by chris
  3. Geometry

    What is the sum of the measures of the interior angles of a convex octagon? What is the sum of the measures of the interior angles of a convex decagon? What is the measure of one interior angle of a regular polygon with 20 sides? Thank You! (:

    asked by Alan
  4. algebra

    Every week Linda must stuff 1000 envelopes. She can do the job by herself in 6hrs. If Laura helps, they get done in 5 1/2 hrs. How long would it take Laura to do the job herself?

    asked by magyc
  5. health

    A seven year old boy breaks his tibia and requires immobilization by a hard cast for six weeks until the break heals. A potential consequence of this therapy is atrophy of the

    asked by Mary
  6. Chemistry

    How do you find the moles of excess reactant? I already know the limiting reactant btw.

    asked by Stuck
  7. Calculus

    Find the surface area formed by revolving the graph of f(x)=81-x^2 on the interval [0,9] about the y-axis. (express the answer in terms of pie.)

    asked by Nancy
  8. Physics

    You are flying in a light airplane spotting traffic for a radio station. Your flight carries you due east above a highway. Landmarks below tell you that your speed is 46.0 m/s relative to the ground and your air speed indicator also reads 46.0m/s. However,

    asked by Anonymous
  9. physics

    how do you determine the relationship between the angle of a ramp and speed of an object sliding down the ramp?

    asked by bjc
  10. calculus

    find the area of the region enclosed by y= square root of x, y=x-2, and y=0. i use f(x) - g(x) and got the answer to be 2, but my classmate got 8/3 do i'm really confuse don't know whats the answer.

    asked by Nancy
  11. Physics

    Any ideal gas temperature may be written as T = Ti*r where Ti=temp at ice point and r = lim(P/Pi) at constant V. Show that the fractional error in T is dT/T = dr/r + 3.73 drs/rs where r s = lim(Ps/Pi) at constant V. Ps is pressure at steam and Pi is

    asked by Jane
  12. Microeconomics

    If the equilibrium price of silver is 4 dollars an ounce, under conditions of perfect competition and the industry is in long run equilibrium, will the average total cost of silver be less, equal or exceed 4 dollars?

    asked by Julia
  13. Political Science

    "A belief in equal rights has often led to the belief in equality of opportunity" and "American society does not emphasize equal results or equal rewards" Explain these conceptions of equality in 200 to 300 words. Include examples from text or current

    asked by Rayna
  14. Maths

    If y is a function of x and z = e^z, show that: x (dy/dx) = (dy/dz) and (x^2) (d2y/dx2) = (d2y/dz2) - (dy/dz) I managed to work out the first part. But I don't know how to prove the second part. Can someone please show me how? Thanks!

    asked by Claire
  15. physics

    i have to do an experiment to "determine the relationship between the angle of the rampand speed of an object sliding down it" i was told i had to have a few variables. -controlled(keep the same) -independent(change 1 thing) -dependent(measure 1 thing) so

    asked by bjc
  16. math

    - Using each of the ten digits 0,1,..9 just once, is it possible to form positive integers whose sum is exactly 100? - The only timepiece owned by a man was a wall clock which had stopped because he had forgotten to wind it. In the afternoon, he wound it

    asked by KMTRENd
  17. Maths

    Please help with these questions: (please show how to do) 1. How many differently shaped rectangles, with positive integer dimensions, have a perimeter equal to their area? 2. Let x be any number less than one, and let y be any number greater than one. S=

    asked by Mea C
  18. Science chemistry

    when carbon dioxide is passed into limewater, a white precipitate is formed. if carbon dioxide is passed continously into limewater, the white precipitate disappears. Explain why and give equations for the reactions.

    asked by saki
  19. science

    why does first mosit litmus paper red and then make it lose colour?

    asked by saki
  20. Science chemistry

    give an example of a metal/alkali mixture that produces hydrogen more vigorously than a zinc/acid mixture.

    asked by saki
  21. Physics

    A car motor is slowing down from 4200 to 1100 rpm over 4 sec. The negative acceleration is approximately 81(I don't have the problem in front of me). How many revolutions does the motor make over those 4 sec. I can't figure this out because the revolutions

    asked by Alyson
  22. Geometry

    Solve the square root of 90 divided by the square root of 9?

    asked by Bryan
  23. English

    1. The best thing (that/which) I've learned this year was something about myself. (Which one was missing in the parentheses, that or which? Are both expressions can be used?) 2. The best thing I've learned this year is the Korean language. ( I've leanred

    asked by rfvv
  24. English

    1. Most of the apples are rotten/bad. 2. Most of the water was polluted. 3. Two-thirds of the chestnuts were spoiled. 4. Two-thirds of the milk was contaminated. (Are all the expressions grammatical?)

    asked by rfvv
  25. English

    1. I couldn't do the shopping by myself. 2. I couldn't enjoy shopping by myself. 3. I couldn't go shopping by myself. (Are they all grammatical?) 4.I can do those things with no problem. 5. I can do those things without any problem. (Are both the same?)

    asked by rfvv
  26. English

    1. The pen was a gift from my father. 2. The pen was a gift by my father. (Can we use 'by' instead of 'from'?) 3. I hope you will like this one. 4. I hope you to like this one. 5. I want you will like this one. 6. I want you to like this one. (#3 and #6

    asked by rfvv
  27. english

    What kind of sentences are these? (simple compound, or complex) 1.The other woman were far off in the field, when we stopped ate the hedge by the side of the road. 2.Then the three of the sisiters in the field appeared, coming toward the road, so the

    asked by christina
  28. English

    1. Teamwork is more important than anything else. 2. Teamwork is more important than any other thing. 3. Teamwork is more important than all the other things. 4. Nothing is more important than teamwork. 5. Nothing is so/as important as teamwork. 6. Nothing

    asked by rfvv
  29. English

    1. To return, we had to go across a stream, but the water rose very quickly. 2. To return, we had to go across a stream, but the water became high very quickly. (Are both the same?) 3. To return, we had to go across a stream. Suddenly the water reduced

    asked by rfvv
  30. chemistry

    Using the volume 1.42mL of 95% ethyl alcohol that's required to dissolve 0.3g at 78 C, how do i find how much sulfanilamide that will remain in the mother liquor after the mixture is cooled to 0 C? (at 0 degrees=14mg/mL is the solubility) thanks

    asked by j
  31. math

    The base of a triangle is 10 cm longer than the height. Determine the height of the triangle if its area is 48 cm^2. -I just plugged in number and got 6cm for the height and 16cm for the base. But I need to show work and I cant remember how to solve this.

    asked by Kaylee
  32. Math

    A rectangular pad of concrete is outlined by a 52-m stripe of paint. Find the dimensions of this pad if the surface area is 168m^2.

    asked by Kaylee
  33. english

    its a probable thesis statement( speaking more than 1 language s a great advantage) . write the paragraph widin 50 worda..

    asked by MUHID
  34. Physics

    You are flying in a light airplane spotting traffic for a radio station. Your flight carries you due east above a highway. Landmarks below tell you that your speed is 46.0 m/s relative to the ground and your air speed indicator also reads 46.0m/s. However,

    asked by Anonymous
  35. 8th Grade Algebra Confusion

    Hi. I am starting a new section in Algebra, and I thought I understood it. But when I went to the back of my book to check the answers, they were way off. We are dividing and simplifying radical expressions and equations.

    asked by Celeste
  36. englishliterature

    is there a book which treats To Kill A Mocking Bird through a psychoanalitial approach?

    asked by naceur
  37. spanish

    What does "to dal ay nochay" mean in English?

    asked by Kathy
  38. Math

    How do you solve this? 8-2(t-1)=t+7 The answer is suppose to be 1 u-8-3u=2u+7 The answer is suppose to be -15/4

    asked by Veronica
  39. English translation please

    I believe it might be "abrazame fuerte Ay,ay ay ay ay,hoochie-coo,toda la noche" That's the way my song sight spelled it out.

    asked by Kathy
  40. English

    Thank you very much for your last corrections. Here are some more sentences about Christmas holidays I would like you to check. 1) How long did your Chrismas holidays last? 2) How long did it take you to eat your Christmas lunch? OR How much time (How

    asked by Franco
  41. art

    how mant difernet arts pices are there

    asked by sylvia
  42. math

    Suppose you have to establish a new company. Suggest in which item or items company should deal. How much sale of the item is required in order to reach at break even point depending on the suggested price of item, production capacity, fixed and variable

    asked by eddy
  43. English

    Thank you very, very much for your help. Which of the following questions are you more likely to use? 1) How long did it take you to eat your Christmas lunch? OR How much time (How long) did you spend eating your Christmas lunch? 2)How much did it cost to

    asked by Franco
  44. Math

    A rectangular pad of concrete is outlined by a 52-m stripe of paint. Find the dimensions of this pad if the surface area is 168m^2. drwls: Is there any way you can explain why you did what you did? I don't understand. You had this: 2 (L + W) = 52

    asked by Kaylee
  45. Chemistry

    Hey guys I did a lab and I have to answer the questions relating to the lab. I did question can someone please check if these are accurate 1. Calculation to Determine the molecular weight of unknown substance Mass of unknown used: 2.0232 g Mass of water

    asked by Saira
  46. Math

    Are the lines 3x-14y=9 and 14x+3y=3 parallel, perpendicular, or neither? Is it perpendicular because the slopes are -14/3,3/14

    asked by Jaison
  47. Physics

    A car accelarates from 40 mph to 60mph in 2.20 sec. determine the car's accelaration in gs. my answer is .911g Determine how far the car went during that 2.20 sec interval. 41.6 m

    asked by Gweedo8
  48. Maths

    If z=(x^n) f(x/y), where f is an arbitrary function, show that: x(partial z/partial x) + y (partial z / partial y) = nz Can someone please show me how to work it out? Thanks!

    asked by Claire
  49. art

    what is distracted paper?

    asked by Sara
  50. art

    I have been asked to draw a picture of myself on distracted paper (could this be newspaper)?

    asked by Sara
  51. Finance

    Using the finance for the Goodyear Calendar Company caluate the basic ratios.

    asked by Sarah
  52. American National Government

    What is a current event example that illustrates the power of one branch of government to check another?

    asked by Sarai
  53. trig

    A plane ascends at a 40° angle. When it reaches an altitude of one hundred feet, how much ground distance has it covered? To solve, use the trigonometric chart. Round the answer to the nearest tenth.

    asked by Anonymous
  54. computer history

    explain history of computer

    asked by history of computer
  55. english

    i am having trouble writing an alliteration/anomatopoei poem that has to do with an alins point of view

    asked by cvb
  56. painting

    plz can u help me i av to find out about three different types of lino printing and i dunno wat to look at let me know as soon as poss i need it now really thanx

    asked by bethany
  57. intro to corrections

    identify and describe the five functions of jails

    asked by lacy
  58. ALGREBRA

    THE FASTEST MOVING INSECT IS THE LARGE TROPICAL COCHROACH. IT SCURRIES AT SPEEDS OF UP TO 2.3 FEET PER SECOND. NOW WRITE AN EQUATION THAT REPRESENTS HOW MANY MILES A ROACH CAN TRAVEL IN 1.5 HOURS

    asked by MARY
  59. 11th grade

    What do you call a female bug that floats? it has to do with algebra. It shows you solutions and graphs. the graphs have letters in front of them so you can try and figure out what the answer is.

    asked by Kim
  60. popular american culture

    how would i rewrite a fragment sentence for example THE ENDEAVOR TO INFLUENCE A SPECIFIC AUDIENCE TO BUY A GOODS OR SERVICE OR A SPECIFIC BELIEF SHOW ME HOW TO REWRITE IT PLEASE

    asked by KATRINA
  61. R.E

    do you think families need a mother and a father who are married

    asked by sara
  62. Art

    The design for Cubist artwork was dramatically different from what had come before in the history of painting. Why did the artists involved in the creation of Cubism choose this radical and innovative approach to the design of their artwork? What

    asked by Anna
  63. Math

    How do you solve this... 9+5x/2=2x-4 The answer is suppose to be -17 thank you for your help.

    asked by Courtney
  64. popular american culture

    please forgive me just was typing in cap no disrepected to anybody. i need a good example of how to rewrite this fragment sentence the endeavor to influence a specific audience to buy a goods or service or a specific belief i need someone just to show me

    asked by KATRINA
  65. Math

    x/2-3=x/5+1 The answer is suppose to be 40/3... I don't know how do this

    asked by Madison
  66. Algebra

    1. Suppose you want to cover the backyard with decorative rock and plant some trees as the first phase of the project. You need 25 tons of rock to cover the area. If each ton cost $40 and each tree is $65, what is the minimum number of trees you can buy

    asked by Anna
  67. English

    My teacher wants me to proofread and make corrections on the following. Can you help me. I will send over the question and then below is what I have revised will you check it for me? The following paragraph contains five errors in grammar, punctuation,

    asked by Robin
  68. chemistry

    how many moles in 100g of each.. its for phosphorous

    asked by ahilary
  69. Maths

    Using each of the 10 digits 0 to 9 just once, is it possible to form positive integers who se sum is exactly 100?

    asked by Jane
  70. Maths

    Andrew arranged the number 1, 2, 3, ...11, 12 into six pairs so that the sum ofany two numbers in a pair is prime and no two of these primes are equal. find the primes and the pairs

    asked by Jane
  71. Maths

    "How old are your three children?" the maths teachers ask a former student. He is told their ages add to 13, and multiply to give the number on his study door (which they can both see). "i will need to know more", the master days, after a few moments

    asked by Jane
  72. history

    when evaluating a web rescource wich terms refers to weather the information is realiable or error free? a. accuracy b. authority c. coverage d. objectivity

    asked by andres
  73. health unit

    I have to develop a lesson plan for a health unit on "What Makes Us Grow" based on a class size of 15 children. I have to include objectives, the time required, materials needed, learning activities, measures for evaluation, and any teacher resource

    asked by christina
  74. physics

    What displacemtn at 70 degrees has an x-component of 450m? What is its y-component? I know the answers are 1.3 and 1.2... but don't know how to work it out?? PLEASE HELP!!

    asked by Kim
  75. phi 105

    Choose one of the text excerpts below. o Chapter 2, p. 28: On Rabbits and Motion o Chapter 2, p. 33: Free Will versus Determinism o Chapter 4, p. 72: Aristotle and Plato on Forms o Chapter 5, p. 83: Augustine on God and Time „h Write a 350- to 700-word

    asked by trudy
  76. College related

    What is the connection between moral character and political activism? Should there be a link between good moral character and political activity?

    asked by Devonette
  77. medical office administration

    A man is shot in the head, and the bullet stops just outside the dura mater.what is the innermost layer that the bullet has penetrated

    asked by Peggy miller
  78. Social Studies (URGENT)

    Why was it much more common to help and visit on'es neighbours during the 1820's in Upper Canada than it is here today? This is the only part in the textbook that talks about it but I can't find answer. text: It was much more common to help and visit on'es

    asked by John
  79. Algebra!

    I don't understand how to factor trimonials.

    asked by Ashley
  80. algebra

    I am having an extremely tough time with integers in algebra when simplifying algebraic expressions. No matter which method I use I still end up confused and end up with a completely different answer. Ex: 5t-{7t-[4r-3(t-7)]+6r}-4r

    asked by marco
  81. English

    Can you proofread this revision and tell me if it looks correct? Thank you. You should invest in a good Dictionary—and a good Thesaurus as well—to help you write well. But you should also realize, as even Samuel Johnson did when he compiled the first

    asked by Robin
  82. taxes

    if a person made 1892.32 for the year of 2009 and they are claiming three dependents,will they get a good refund amount?

    asked by annoymous
  83. physics

    a person throws a ball upward into the air with an initial velocity of 20.0 m/s, calculate how high it goes

    asked by Anonymous
  84. alegebra

    when do sky divers use decimals ?

    asked by jay
  85. popular american culture

    hi i had to write a paper on print media and i sent my paper though writepoint and it said that this phrase of my paper was to wordiness and consider revising nothing inappropriate so what else could i say thank you

    asked by KATRINA
  86. public speaking

    I don't know if i can post what i have done so far but i wanted someone to point me in the right direction.. I will critically evaluate every aspect of the speech that the President made especially his delivery, audience, movements, eye contact, posture,

    asked by yoany
  87. math

    I need help finding the answer In the US about 46% of the population wear glasses or contact lenses. A sample of 85 people is taken. About how many people would you ecpect to wear glasses or contact lenses? Do I multiply .46 to 85?

    asked by Kyle
  88. Physics

    Two identical spheres, A and B, carry charges of +6 microcoulombs and -2 microcoulombs. If these spheres touch, what will be the resulting charge on sphere A?

    asked by Priscilla
  89. statistics

    According to a recent survey, 38% of americans get 6 hours or less of sleep each night. If 25 people are selected, find the probability that 14 or more people will get 6 hours or less sleep each night..

    asked by brin
  90. Algebra help

    m having an extremely tough time with integers in algebra when simplifying algebraic expressions. No matter which method I use I still end up confused and end up with a completely different answer. Ex: 5t-{7t-[4r-3(t-7)]+6r}-4r

    asked by marco
  91. Physics

    The electrostatic force of attraction between two small spheres that are 1.0 meter apart is F. If the distance between the spheres is decreased to 0.5 meter, the electrostatic force will be a) F/2 b) 2f c) F/4 d) 4F I know when the distance is decreased

    asked by Priscilla
  92. Business Math and Statistics

    Suggest if the company need to set aside the lump sum of money that will collect interest or company should purchase annuities. Support your suggestion with argument.

    asked by Anonymous
  93. science

    I am doing a project on Isaac Newton and have to find info on born,died,study, famous scientists he worked with,apple and laws of motion. I have found all the answers except the famous scientists he worked with. I have been on lots of websites but I cannot

    asked by Janey
  94. social studies

    i have to choose a location for a theme park , how would geography affect my choice

    asked by savannah
  95. popular american culture

    how can i post my essay to this website and then i might can get the help i need because im getting cluster with fusturated please help me

    asked by KATRINA
  96. science

    Am i correct saying that Isaac Newton studied at Trinity College, Cambridge and University of Cambridge, Royal Society and Royal Mint. Any help is appreciated. Many thanks.

    asked by Janey again
  97. com220

    Need some feedback or a review of a rough draft essay and full sentence outline. It may appear that I am not referencing sources, but believe me I have full reference page with 7 sources to site thus far in. I just need someone to take a look at the layout

    asked by wendy
  98. math

    How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?

    asked by Jason
  99. Math

    2(x+1)/4

    asked by Cara
  100. 3rd grade

    Need help unscrambling these letters: eeiochrs

    asked by Nicholas
  101. trig

    The eyes of a basketball player are 6 feet above the floor. The player is at the free-throw line, which is 15 feet from the center of the basket rim. What is the angle of elevation from the player's eyes to the center of the rim if the rim is 10 feet above

    asked by anonymous
  102. Math

    Can you please explain to me how to do this? 3y/4-1/2=2

    asked by Clinton
  103. Maath

    I don't understand how to do this. I read the steps in the book and they are really confusing. Any help would be beneficial. r/5=r+1/8

    asked by Vanya
  104. English

    Invent something that would make doing homework easier. Explain it 5+ sentences. Copy into paragraph format.

    asked by Nelson
  105. Math

    Two small planes start from the same point and fly in the opposite directions. The first plane is flying 35 mph slower than the second plane. In 2 hrs, the planes are 530 mi apart. Find the rate of the slow plane.

    asked by Matthew
  106. geometry

    what is regular and not regular polygons?

    asked by Kaleb
  107. math

    what does Ø mean

    asked by george
  108. Math

    Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41 A)add -19w B)add 6w C)add 19w D)add -36

    asked by george
  109. Math

    what is the least 4-digit number you can make with the digits 2, 4, 3, 1?

    asked by Brianna
  110. Homework

    What 5 leter words can you get out of these letters: eeiochrs I already got: chores, choir, chore, cheer - need 2 more

    asked by Nicholas
  111. physics

    Radio waves, light and X-rays, electromagnetic waves

    asked by oumayma
  112. English/Ideas

    I have to write a 10 minute play in English on a topic of my choosing. I'm in High School and I need a couple of ideas. I'm pretty good when it comes to writing, it just takes me a while to come up with a topic. I was thinking maybe something funny,

    asked by Anne
  113. college english

    I have to find five errors in this paragraph and rewrite it correctly, please see my version after the original version below. Please let me know what you think, is it grammatically correct? Original paragraph: When your dictionary shows more than one

    asked by Wendy
  114. calculus

    Differentiate the following function. f (x) = 6 x 2 sin(x)tan(x) Where do I begin?

    asked by Gabe
  115. biology

    what causes the PH to change as the food moves from the stomach to the small intestine

    asked by lila
  116. Math

    (8.3*10^2)*(9.1*10^-7) Please help me solve this result in scientific notation.

    asked by Gaby
  117. Social Studies

    Explain why children's literature is a key component in content area reading instruction.

    asked by Anonymous
  118. Math

    How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?

    asked by Jason
  119. Physics

    1. The electrostatic force of attraction between two small spheres that are 1.0 meter apart is F. If the distance between the spheres is decreased to 0.5 meter, the electrostatic force will be a) F/2 b) 2f c) F/4 d) 4F I know when the distance is decreased

    asked by Priscilla
  120. English!

    If you decided to search for information from ABI/INFORM, what pieces of information would always be included within your search results? Answer (A) Article title, date, and name of publication (B) Call number, title, date of publication (C) Article title,

    asked by *Thara*
  121. english!

    Make sure you understand the topic(s) is a step in the research process. (A) This step needs to be done as soon as your research is completed. (B) This step is the last step in the research process. (C) Always ensure you grasp the topic before you go to

    asked by *Thara*
  122. English!

    What type of company information can be found on the business library databases? Answer (a) Full-text articles on Canadian companies from newspapers, magazines and journals. (b) Full-text articles on Canadian companies from newspapers, magazine and

    asked by *Thara*
  123. US History

    I need to pick a term paper topic involving American History. I want to do something about a controversy during a war time, but I don't know what to pick. Maybe something during the Vietnam War or the Gulf War? Where could I find thesis ideas or do you

    asked by Dan
  124. math

    3x/4-1/2 is

    asked by John
  125. Math

    7x/8 + 1/4 > or equal to 3x/4

    asked by Miranda
  126. Social Studies

    I need help finding a current event. I have looked everywhere and can't find one. It is supposed to be about catholic schools week and has to have happened anytime between last sunday and today. please don't give me one about a certain school. i would like

    asked by Zoey
  127. geometry

    what is a quadrilateral shape with adjacent sides not equal; 2 pairs of conguent sides; 4 right angles?

    asked by nick
  128. Science/History

    On my previous post at 3.22pm (& 3.29pm) pm I asked what famous scientists did Isaac Newton work with. Unfortnately no-one has answered and I have been unable to find a website that tells me. I have come across Edmund Halley name linked to Newton's would

    asked by Janey
  129. math

    Round the number to the place value indicated. 14) 235 14) _____ A) 7900 B) 8100 C) 8000 D) 9000

    asked by Jean
  130. World History

    I know what the white man's burden means, but my teacher wants us to rewrite it in a modern way. I am confused on how to do it could someone do the first stanza for me as an example? Take up the White man's burden -- Send forth the best ye breed -- Go bind

    asked by Briana
  131. writing

    in acts of resistance what is the tone of scarry introductory paragraph?

    asked by megan
  132. Chemistry

    What is the representative particle for a salt, nacl2?

    asked by Adrian
  133. chemistry

    what ion has 12 protons and 10 electrons?

    asked by abby road
  134. Algebra 3

    x^2/x^2-1 divided by 3x/x+1

    asked by Jennifer
  135. Biology

    14. The major components of a DNA molecular subunit are a. a chromosome, deoxyribose, and double helix b. a five-carbon sugar, phosphate group, and a nitrogen-containing base c. adenine, guanine, cytosine, and thymine d. all of the above D 16. During DNA

    asked by mysterychicken
  136. journalism?

    did any members of the present supreme court vote on the hazelwood case in 1988?

    asked by stace
  137. chemistry

    Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of

    asked by Dina
  138. pre-calculus

    Verify the following: tan^2 - sin^2 = tan^2 x sin^2 Thanks.

    asked by Jane
  139. college physics

    A particularly beutiful note reaching your ear from a stradivarius violin has a wavelength of 39.1cm. The room is slightly warm, so the speed of sound is 344m/s. If the string's linear density is 0.670g/m and the tension is 140N, how long is the vibrating

    asked by genevieve
  140. science

    The skeleton consists of 4 things what are they?

    asked by carmelo
  141. physics

    Four identical charges (+4.0 uC each) are brought from infinity and fixed to a straight line. The charges are located 0.33m apart. Determine the electric potential energy of this group.

    asked by Allee
  142. Physics

    Two idencial point charges (q = 7.40 x 10^-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.440m. A test charge (q = -2.30 x 10^-8 C), with a mass of 7.25 x 10^-8 kg, is released from rest at one of the empty corners of the

    asked by Allee
  143. Message for KMTRENd

    One would have thought that the least you could have done was give an acknowledgment for a most extraordinary reply you got to your question by tchrwill http://www.jiskha.com/display.cgi?id=1265187860

    asked by Reiny
  144. English

    I have to do a descriptive paragraph and here are the directions: I can write a descriptive paragraph on either a place I like or an imaginary place.-I picked imaginary 1. First sentence begins with an adjective 2.2nd sentence begins with an adjective

    asked by Sara
  145. chemistry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium

    asked by r
  146. chemistry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium

    asked by r
  147. chemistry

    When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

    asked by u
  148. Health Care

    why is it important too individualize an integrative treatment plan?

    asked by Jake
  149. Science

    Pendulum question: What factors determine the swing rate of a pendulum? prediction: ? I don't get it, It says write a prediction about what factor(s) you think will affect the swing rate and how these factor(s) might affect the swing rate.

    asked by Sara
  150. Chemistry (Grade 11)

    A radioactive sample of 141Cs has a half-life of 32.5 days. In a sample that contains 8.00*10^7 nuclei of 141Cs, how many beta particles per second will be emitted? A 19.8 B 1.7*10^6 C 71 076 D 1185 E 2.47*10^-7 The 141 supposed to be a superscript text,

    asked by David
  151. physics

    The centers of a 8 kg lead ball and a 100 g lead ball are separated by 13 cm. What gravitational force does each exert on the other?

    asked by margaret
  152. health care

    Health care is evolving and facing increasing challenges related to reimbursement, staff shortages, patient safety, increasing costs, and increasing regulatory requirements. As a health care leader, ehich leadership skills do you find most valuable when

    asked by annoymous
  153. Meters

    Vincent has cut three pieces of rope to complete a science project. Two pieces are of equal length. The third piece is one-quarter the length of each rope of the others. He cut the three pieces from a rope 54 meters long with any rope left over. Fine the

    asked by Camile
  154. economics

    what is the consumer surplus, producer surplus and deadweight loss if a monopolist has demand p=100-Q and Cost= 10Q Thanks xox

    asked by chloe
  155. trig/algebra

    if p is a multiple of 3 and q is a multiple of 5 which of the following is true?

    asked by samantha
  156. Science

    Explain why every substance has a characteristic density, but no substance has a characteristic mass.

    asked by Bo
  157. Science

    It says: What variable(s) affect the swing rate of a pendulum? What variable(s) do not? Variables which affect the swing rate of a pendulum are wind, weight, height, gravity, and strength of string. I don't know the second part. maybe time?, distance?

    asked by Sara
  158. trig

    In triangle ABC, sinA=0.6, a=10 and b=7. Find sinB

    asked by Pema
  159. social studies

    what are three natural resources in Iowa?

    asked by amanda
  160. Precalculus

    Pilot Reem Ahmad's flight plan has her leaving Dulles International Airport and flying a Boeing 727 due east at 450 mph. There is a 65 mph wind with the bearing 60 degrees. a. Determine the compass heading that Reem should follow. b. Determine the

    asked by Marie
  161. Statistics

    Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly

    asked by Aaron
  162. Precalculus

    Juana and Diego Gonzales, ages six and four respectively, own a strong and stubborn puppy named Corporal. It is so hard to take Corporal for a walk that they devise a scheme to use two leashes. If Juana and Diego pull with forces of 23 lb and 27 lb at the

    asked by Marie
  163. US HISTORY

    I am trying to understand the following 3 concepts: Popular Sovereignty Separation of powers (and the 3 branches of gov) Checks and balances (how does a branch have power over another) Thank you for your insight! Ash

    asked by Ash
  164. algebra

    Denis is designing a storage box in the shape of a cube.Each side of the box has a length of 10 inches. she needs more room anddecides to constructa largerbox in the shape of a cube with a volume of 2,000 cubic inches. By how many inches to the nearest

    asked by anum
  165. trig

    hi honestly speaking i have no idea how to even start this problem but i know that a cube is to the 3rd power here is the problem Denis is designing a storage box in the shape of a cube.Each side of the box has a length of 10 inches. she needs more room

    asked by anum
  166. geometry

    hi honestly speaking i have no idea how to even start this problem but i know that a cube is to the 3rd power here is the problem Denis is designing a storage box in the shape of a cube.Each side of the box has a length of 10 inches. she needs more room

    asked by anum
  167. science

    ____Na + ___H2O give us __ NaOH+ ___ H2O this a chemistry;Balancing Chemical Equation H2O is water sorry because i don't know how to put 2 in bottom and explain me how you figuire it out

    asked by anu
  168. college english

    I need to know if this paragraph has any grammatical errors in it. Often, however, the dictionaries are wrong about this; in fact, by putting one word first, they are supporting a self-fulfilling prophecy. Consider the entry, "ax or axe", which appears

    asked by kitty
  169. biology

    How might the efficiency of glycolysis change if this process occurred in only one step?

    asked by Walter Leyva
  170. 3rd grade

    what multiplication fact can be found by using the arrays for 2 times 9 and 5 times 9

    asked by Bobbie
  171. English

    Can you check these sentences for me, please? 1.After Christmas I went to my second-holiday home in the mountains and I stayed there till January 30. 2.On Wednesday I returned home, because my parents were giving a party 3.My parents were having a party

    asked by Franco
  172. health care

    Ms. Sue or whomever, What is the purpose of asking a question for help and then get smart comments like we'd be glad to comment. That's not answering the question. i thought the purpose of this site was to get help, not be smart and don't lend help.

    asked by annoymous
  173. Public Speaking

    Why is knowing your audience an important part of capturing and maintaining their attention? What is the impact of culture? my response: The impact of culture weighs heavily into how you will connect and relate with your audience. Although easy to consider

    asked by Bryan
  174. algebra

    2(x-3)^-3 (x-3)+ 7

    asked by Anonymous
  175. math

    i need help rounding numbers. for example, 34.566 to the nearest hundreds.

    asked by daniel
  176. math

    I have a few question so I will number them off. Please answer them for me I have a test tommorow and I am sure this can help other people too. 1.How do you make an equation that passes through a y-intercept and a certain point in slope-intercept form.

    asked by John
  177. physics

    how to you figure momentum and velocity

    asked by sam
  178. 5th grade math

    eight states border one or more of the five great lakes.write a fraction reprersenting the part of the 50 states that border a great lake.write the fraction in it's simplest forms.

    asked by Brittany
  179. Chemistry

    Thank you Dr Russ for you answer. Anyone who can answer: I have the moles of excess reagent, but now I need to find the concentration of excess reagent. I know concentration is mol/L, but how do I find the volume of my excess?

    asked by Stuck
  180. Biology

    14. The major components of a DNA molecular subunit are a. a chromosome, deoxyribose, and double helix b. a five-carbon sugar, phosphate group, and a nitrogen-containing base c. adenine, guanine, cytosine, and thymine d. all of the above D? 16. During DNA

    asked by mysterychicken
  181. health

    I am going to be making a power presentation on the RED CROSS, I am a little stuck on the following section, describe national incident command structure, I have been looking it up on the internet, and the results that I am recieving are to inroll in there

    asked by linda
  182. english

    what realization does Siddhartha come to in chapter 2?

    asked by taylor
  183. english

    I have to write a compare and contrast essay for my Freshmen comp. class, the topic I chose is cockroaches VS. Beatles. Im not sure if this is risky, because i don't really know my professor, but i cant find another topic that i can successfully wright

    asked by layla
  184. health

    Write an essay evaluating the positive and negative influences of family, peers, and community on risk behaviors like drug, alcohol, and tobacco use; and sexual activities.

    asked by Brandon
  185. astronomy

    Astronauts on the Moon look back at Earth, a distance of about 400,000 km away. If the cities of Washington, D.C. and New York are separated by 300 km, what will be the angle between them when viewed from the Moon?

    asked by laura
  186. HELP

    Did any members of the present court justices vote on the Hazelwood case in 1988? If any did, how did they vote? Who selects the justices, and how long do they serve on the court?

    asked by Jillian
  187. 6th grade math

    what is the area of a circle whose daimeter is 5 in

    asked by Ma'Treeka
  188. Finance

    What is the finance chrg on a 4200 LOAN that requires 12% downpmt and 24mthly pmt of $195

    asked by paulette
  189. Language

    How do I set up a comparsion table for two stories

    asked by TOM
  190. math (probabiliyt statistisa)

    heads or tail? There are only two possibles outcomes whee flipping a coin. The chance of getting head is one out of ---. We write that with the fraction------. is the answer one out of two. the fraction will be 1/2.

    asked by queeneka
  191. English

    What's a good TITLE for a play about a girl who acts so depressed because of a mothers death and a friend who helps her out in the end realize she can move on??!! Please I'm stuck, I want something creative! Any ideas??!!

    asked by Anne
  192. Science

    Could someone please check me previous before previous Science post, thanks

    asked by Sara
  193. Intro to art history

    I have to write a paper comparing two art sculptures. I have write if it's an open or closed contour but I don't know what that means.

    asked by JJ
  194. teacher aide

    What is active listening?

    asked by amel
  195. math

    express it its lowest terms the ratio of 6 to 9:of 12x to 16y:of am to bm:of 20ab to 10bc: of m+n to 2 2 m -n.

    asked by chris
  196. Precalculus

    I tried doing this problem, but I still don't understand it at all... Pilot Reem Ahmad's flight plan has her leaving Dulles International Airport and flying a Boeing 727 due east at 450 mph. There is a 65 mph wind with the bearing 60 degrees. a. Determine

    asked by Marie
  197. algebra

    x - = 12 3

    asked by emily
  198. english

    "Man created by god, was given the faculty for understanding truth, but he has lost this faculty though the freedom he has also been given, that is to say through, his own, guilt." what is this quote trying to say? I have to incorporate into my essay about

    asked by Anonymous
  199. ethics

    I need help writing a two page paper answering these questions about the topic Autonomy: Respecting the Autonomy of Old People Living in Nursing Homes. Please help. Discuss the major codes of ethics of the stakeholders involved in the issue and how these

    asked by Niki
  200. math

    what is the ratio of 1 1 of 1 - to - - to 2 4?, 2 1 2 3 - - to- 3?,of 3 4?

    asked by chris
  201. math

    what is the ratio of 1 1 of 1 - to - - to 2 4?, 2 1 2 3 - - to- 3?,of 3 4?

    asked by chris
  202. Math

    Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly

    asked by Ted
  203. English

    1. This year he has learned Chinese. (Does this sentence mean that he is learning Chinese now? Or does this sentence mean that he learned Chinese for some period, but he is not learning Chinese? Does this sentence mean continuous action or the result of

    asked by rfvv
  204. Physics

    Why is the CM of a 1.00m length of pipe at its midpoint, whereas this is not true for your arm or leg?

    asked by Charlie
  205. Math

    If you begin with a right triangle with sides a,b,and c and decrease the right angle how does a^2 +b^2 compare with c^2?

    asked by Nichelle
  206. english

    Well I came up with a new topic frugal people vs. shopaholics

    asked by layla
  207. math

    find the ratio of 4 2 2 3 - x to - x of - ab 5 5 , 4 to 1 1 1 - ac of 2- to 7- of .7m to .8m, of 2 , 2 2, 2 2 2 ( x -y ) to (x-y) .

    asked by chris
  208. Math

    The scale of two similar quadrilaterals is 1:3. The perimeter of the smaller quadrilateral is 90 centimeters. What is the perimeter of the larger quadrilateral?

    asked by Ashely
  209. Physics

    A 0.0600 kg tennis ball, moving with a speed of 2.50 m/s, has a head-on collision with a 0.0900 kg ball initially moving away from it at a speed of 1.00 m/s. Assuming a perfectly elastic collision, what is the speed and direction of each ball after the

    asked by Ashley
  210. MATH

    two boys weigh 120 pounds.what is the ratio of the weight of the first to that of the second?

    asked by chris
  211. math

    the ratio of the consumption of gas to new york one year to that in chicago was 7 if 120 billion cubic feet were - 4 . consumed in chicago,what was the consumption in new york?

    asked by chris
  212. Math

    What is the total price of $3.25,$1.10 including 7% tax

    asked by Dora
  213. Biology

    Explain how the half-life of a radioactive isotope affects the usefulness of that isotpe in dating specific types of rock?

    asked by brooke
  214. Biology

    Why do some scientist think that areas protected from the atmosphere might have favored the production of organic compounds on early life?

    asked by brooke
  215. calculus

    A potter forms a piece of clay into a cylinder. As he rolls it, the length,L, of the cylinder increases and the radius, r, decreases. If the length of the cylinder is increasing at .1 cm per second, find the rate at which the radius is changing when the

    asked by mandy
  216. Biology

    Why was the discovery of microspheres and coacervates an important contribution to the understanding of how life might have originated on Earth?

    asked by brooke
  217. Biology

    Explain how early RNA molecules might have been able to respond to natural selection?

    asked by brooke
  218. ETH 125

    Describe two components to the immigration process from what you found on the USCIS website

    asked by Monica
  219. math

    can someone help me on this question ive been stuck on it for almost an hour The mean of two numbers is 5. The sum of four times one number and three times the other number is 2. Find the numbers. can u help me get start it by giving me the formula please

    asked by tony
  220. Biology

    Name three characteristics of mitochondria and chloroplasts that support the endosymbiotic hypothesis of eukaryotic evolution?

    asked by brooke
  221. math

    the ratio of the consumption of gas to new york one year to that in chicago was 7/4.if 120 billion cubic feet wereconsumed in chicago,what was the consumption in new york?

    asked by chris
  222. 3rd math

    write the fact family for 2,11,and 9 ______________? ______________? _______________? ________________? I don,t understand of rule -.25 in $1.25 out $1.oo in $0.30 out $0.05 in $___ ? out $0.75 in 2.40 out _____? please help me!!

    asked by pat
  223. math

    whats the ratio of 6 to 9?

    asked by chris
  224. Physics

    In a single-slit diffraction pattern on a flat screen, the central bright fringe in 1.0 cm wide when the slit width is 4.70 10-5 m. When the slit is replaced by a second slit, the wavelength of the light and the distance to the screen remaining unchanged,

    asked by linds
  225. physics

    Suerat made paintings in which separate dots of color are placed close together on the canvas, and from a distance they merge in the eye to form an image. Consider such a painting with the dots in the painting separated by 1.7 mm and assume that the

    asked by linds
  226. Math

    Four hundred people apply for three jobs. 130 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women? (Round the answer to six decimal places.) (b) If three persons are selected at random, what

    asked by Marla
  227. math

    what is the ratio of 1/2 to 1/4?

    asked by chris
  228. math

    Need help converting 9.4 x 10^2 m/s^2 to cm/minute^2 this is what i got so far 940 x 10^2 x 3600 =3.4 x10^8 cm/min^2 is it right

    asked by jake
  229. physics

    A canoe has a velocity of 0.490 southeast relative to the earth. The canoe is on a river that is flowing at 0.520 east relative to the earth creating a 45 degree angel between the two velocities.Find the magnitude of the velocity of the canoe relative to

    asked by Anonymous
  230. Math

    One solution of 12x^3-23x^2-3x+2=0 is 2. Find all other solutions. I tried rearranging the equation to factor by grouping, but that 23x^2 is bothersome and I can't get the right answers (I know the answers are 2, 1/4, and -1/3). Help? Thank you!

    asked by Momo
  231. science

    the question is.unequal heating and cooling in the atmosphere can result in a what.

    asked by Kayla
  232. Art history

    Can you tell me if these sculptures have open or closed contour? I can't post the link but if you search the name and the numbers it should show up. Sculpture 1: Mother and Child [1979.206.121] Sculpture 2: Virgin and Child [33.23]

    asked by JJ
  233. physics

    Certain neutron stars (extremely dense stars) are believed to be rotating at about 100 rev/s. If such a star has a radius of 10 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation?

    asked by margaret
  234. math

    Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate

    asked by chris
  235. Physics

    A train moving at a constant speed of 68.0 km/h moves east for 36.0 min, then in a direction 48.0° east of due north for 30.0 min, and then west for 45.0 min. What is the average velocity of the train during this run?

    asked by Josh Burnz
  236. Math

    Reasoning Four people each bought 2 bottles of Vermont maple syrup Each person plans to share their bottles with 3 friends How much does each person get?

    asked by Taylor
  237. Math

    How do I find lim x+4/x-4 as x approaches 4?

    asked by Stuck
  238. English

    1. Look at the boy and his dog that are walking on the road. 2. This is the very fountain pen that I looked for. 3. Who that has common sense can say like that? 4. No people that are from Korea can have difficulty in speaking Korean. (Are they all

    asked by rfvv
  239. Pre-Algebra

    Directions: Find the missing measure of each angle How do I do this? It's a triangle, angle one 2x + 15 x 45degrees

    asked by Dean