Questions Asked on
February 8, 2009

  1. chemistry

    I am confused on how to even start this problem... A ground state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and

    asked by Candace
  2. Physics

    We were doing a refraction lab where you passed a lazer beam through a water in a semi-circular dish. I was wondering why we used a semi-circular shape?

    asked by Lena
  3. science

    input and output are good words to use when discussing systems because.. Two in puts, two outputs, and two side effects of the health care system are... The inputs to a garden that occur naturally are.. THe inputs that are provided by humans are.. Systems

    asked by beeca
  4. Chemistry....Please help

    Given the equilibrium constant values: 1.N2(g)+ 1/2O2(g) N2O(g) KC=2.7*10^{-18} 2.N2O4(g) 2NO2(g) KC= 4.6*10^{-3} 3. 1/2N2(g)+ O2(g) NO2(g) KC=4.1*10^{-9} ----------------------------- 2N2O(g)+ 3O2 (g) 2N2O4(g) I need help i dunt know what to do next Part:

    asked by Saira
  5. Physics

    Calculate the following, expressing the answer in scientific notation with the correct number of significant figures: (8.86 + 1.0 * 10^-3) / 3.610 * 10^-3 please help me write out the equation and fill in the appropriate data thanks for your help Jiskha

    asked by y912f
  6. SCIENCE!!

    why are input and output good words to use when dissucssing systems?? also... what are two inputs and two outputs of health care system. also... what are the inputs to a garden that occur naturally? sorry i have so many questions but i have a test tomorrow

    asked by beeca
  7. science chemistry

    How many moles of oxygen atoms are there in 2 moles of CuSO4?

    asked by John
  8. Poem: I Hear America Singing By: Walt Whitman

    Could you check this question please? Thanks. 1. What is the significance of the poem? (i.e. what does it mean and what impact does it make on the reader?) Answer: The poem "I Hear America Singing," means that all Americans are working happily at there

    asked by Starry
  9. 10th grade

    Assign oxidation numbers to each atom in the following compounds: HI, PBr3, GeS2, KH, As2O5, H3PO4 (the numbers should be subscripts)

    asked by Michael
  10. chemistry

    I am confused on how to even start this problem... A ground state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and

    asked by Candace
  11. Arts and Culture

    Can anybody help me with this question? I'm a little confused by what I'm really suppose to do. Thanks. I'm to select two works of art. Then the chosen works must be from the field of visual art, architecture, literature, or music. One piece must be from

    asked by B.B.
  12. accounting

    How the beginning financial position in a ledger set up?

    asked by Yana
  13. chemistry need help asap!!!!!!

    How do you balance these chemical equation? o Fe2O3 + 3H2 → 2Fe + 3H2O o 4NH3 + 5O2  → 4NO + 6H2O

    asked by Peter
  14. chemistry help

    how do you balance these chemical equations NH4)3PO4 + Mg (CH3COO)2 -> Mg3(PO4)2 + NH4CH3COO MoO3 + H2SO4 + Zn -> Mo2O3 + H2O + ZnSO4

    asked by bob
  15. math

    you start with an equilateral triangle and then trisect each of the sides with a new equilateral triangle on the middle third of each trisection, repeat the process indefinitely how would you prove that the perimeter is infinite?

    asked by alex
  16. Pre-calculus

    ARE THESE ANSWERS CORRECT? Directions: The playing times for 20 songs on a top-hits radio station are recorded in the chart below. Using the times listed in the chart, circle the correct answer for questions 1-3 below. Playing Time (minutes:seconds) 3:32

    asked by Mary
  17. physics

    True or false questions a)Rubbing a polythene rod with a duster gives the rod extra negative charge. b)Rubbing a polythene rod with a duster takes away positive charge from the duster. c)The duster will have the same charge as the polythene rod it has

    asked by Victor
  18. physical science

    if the absolute pressure of gas is 550.280kPa , its gage pressure is ?

    asked by kathy
  19. chem

    The diameter of a neutral neon atom is about 1.4 multiplied by 102 pm. Suppose that we could line up neon atoms side by side in contact with one another. Approximately how many neon atoms would it take to make the distance from end to end 1 cm? I got

    asked by hannah
  20. science

    what object orbits the sun ?

    asked by jada
  21. math, pre-statistics

    A gumball machine is filled randomly with gumballs:red,green,purple,white,pink and yellow. The company claims the following percentages of each can be found in an unopened carton.30%red,20%green,20%purple ,20% white,5%pink and 5%yellow. What is the

    asked by Sabrina
  22. markrting

    How does Nike's Web site help the company strengthen its relationships with its stakeholders?

    asked by dee
  23. chemistry...DRBobb i have a questionnnn

    We actually talked about this before just to remind you im posting the previous post below: ______________________________________________________ ____________________________________________________ And i have a different question regarding a post someone

    asked by Saira
  24. accounting

    In 2007, Paul who is single has a comfortable salary from his job as well as income from his investment portfolio. However, he is habitually late in filing his federal income tax return. He did not file his 2007 income tax return until November 30, 2008

    asked by Mikki
  25. Math

    What is 3x3

    asked by Taylor swift
  26. English

    In the book "I Know Why the Caged Bird Sings," what was the phrase that Maya Angelou said that caused her grandma to whip her? (Her grandma thought it was a sinful thing to say). I remember it was something that the average person would not think was

    asked by Leaore
  27. Psychology

    What is the difference between absolute continuity and differential continuity? Search does not help as it deals with math not the psychology side. Thanks

    asked by Julie
  28. Physics

    1.) a charge of -2x10^-9 C in an electric field between two metal plates 4cm apart is acted upon by a force of 10^-4 N. a.) what is the strength of the field? b.) what is the potential difference between the plates? my question: how will going to solve

    asked by konan
  29. chemistry need help asap

    how do you balance these equations? Ag2O -> Ag + O2 C6H6 +O2 -> CO2 + H2O

    asked by bob
  30. Physics

    A swimmer tries to go straight across a river that is 500m wide. The swimmer can swim at 1.5m/s. There is a current of .05m/s downstream. Calculate a) the actual velocity of the swimmer b) how long it will tale to reach the far shore c) how far donstream

    asked by Sally
  31. Physics - urgent!!!

    A swimmer tries to go straight across a river that is 500m wide. The swimmer can swim at 1.5m/s. There is a current of .05m/s downstream. Calculate a) the actual velocity of the swimmer b) how long it will tale to reach the far shore c) how far donstream

    asked by Sally
  32. Atoms- Science

    Elements having 3 or fewer electrons in the outer energy level are classified as ____________________.

    asked by Twilight lover
  33. 4TH GRADE URGENT LATE MATH HOMEWORK!!!!

    What shape has the same number of vertices as faces? Thanks!

    asked by Isabelle
  34. SCIENCE!!

    1.Inter - means between or among and connect means to link - how does the word "interconected" apply to systems and subsystems? 2.Choose two systems and explain how the component affect the way the other components function. 3.How might one understanding

    asked by beeca
  35. Literature question

    what does intent mean for a poem?

    asked by Starry
  36. photography

    i was assigned a project to recreate a famous photo with my own black and white camera. it can be of anything that would be easy to recreate-people or places. i live in london. who are some famous photographers (portrait or other) or some famous photos

    asked by anonymous
  37. Science

    Hi, could someone please explain radiation,conduction, convection, the kinetic molecular theory, and the particle theory? Thanks!

    asked by ...
  38. English

    Pick a word from the parenthesis, or choose a different word, that best fits in the sentence below: Joe DiMaggio was (famous,known,remembered,recognized,etc..) for holding the record for the longest consecutive game hitting streak (56 games) in 1941.

    asked by SMILEY (I NEED MS> SUE OR WRITEACHER!!) HELP!!
  39. chemistry

    What chemical test do you use to distinguish between iron and iron sulphide (axcept using a magnet)?

    asked by Liza
  40. english

    how would henry david thoreau react to the issues of abortion and the iraq war please help me thank you

    asked by bill
  41. american revolution

    the american revolution was an attempt by the patriots to

    asked by sandra
  42. History

    Was Sun Yat Sen's party (KMT) disorganized or supportive?

    asked by alex
  43. Math

    If 156 divided by 1 what is it?

    asked by Killer
  44. Math

    Each side of a triangle ABC is 75 units long. Point D is the foot of the perpendicular drawn from A to side BC. Part E is the midpoint of line segment AD. Find BE. Show picture and work.

    asked by Mary
  45. psychology

    What task component distinguishes between the wechsler scales from the SBIS?

    asked by nicole
  46. Econ

    There are several features people would like money to possess (portability, durability etc.) Name two features or aspects of money that explain why diamonds do not serve as money in most countries. Acceptability- most countries just don't accept it.

    asked by Andrea
  47. English Grade 11

    The Layers I have walked through many lives, some of them my own, and I am not who I was, though some principle of being abides, from which I struggle not to stray. When I look behind, as I am compelled to look before I can gather strength to proceed on my

    asked by Anonymous
  48. pre algebra

    x2(xy3)2+y2(x2y2)2

    asked by lalo
  49. math

    what is the absolute value of - I 4 I ?

    asked by marie
  50. combinatorics/probability

    Can't figure this problem out... wasn't great at the combinatorics unit, then it turns out everything carries over to probability. five couples attend a bridge party, including mr. and mrs. smith. they are randomly assigned partnership pairs. 1.

    asked by Anonymous
  51. Math

    This question is based on a project- Describe three concentric circles having a 1-inch, a 3-inch, and a 4-inch radius. Draw the diameter of the large circle.(This is also the diameter of the two smaller circles) Please I Need So Much Help. This Project Is

    asked by Alena
  52. Math help

    3. You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in

    asked by tera
  53. history

    I am struggling to figure out the way that student potests effected the Vietnam War can anyone help?

    asked by Brian
  54. math

    for what values of x, where a is a positive real number, is |x-a| = |x|-a why?

    asked by ishi
  55. Math

    Abdul wants to lease an apartment for 5 years. how much money would he have paid at the end of 5 years if he pays a $400 deposit and a $525 a month in rent?

    asked by Cassie
  56. Algebra 2

    Ok so I'm suppose to do this Square root of 6 ___________________ Square root of 2 I know when you divide a radical over radical and they have the same what ever it's called (the same number outside of the radical that determines if it's cube root squared

    asked by HELP!!!!!!!!!!!
  57. psychology

    What is the difference between absolute continuity and differential continuity?

    asked by Julie
  58. CRT205

    Other questions have been asked about the article "Contolling Irrational Fears After 9/11 and Identifying at least two arguments and answering the questions on the syllabus. -I have found two which I think can be used. Will you please let me know if these

    asked by Confused
  59. Science

    how many moles of oxygen atoms are there in 2 moles of CuS04?(4oxygen) please show calculations

    asked by John
  60. Confused: CRT205

    I've removed your post in which you copied an essay and some questions about the aftermath of 9/11. Please repost it along with your answers to the questions. We'll be glad to critique your answers.

    asked by Ms. Sue
  61. Biology

    Physicians often want to know the glucose and lipid levels in a patient's blood and whether proteins are present in a patient's urine. What might this information show about an individuals health?

    asked by Sabrins
  62. Physics

    How do I find index of refraction if I have the incident angle and refraction angle?

    asked by Lena
  63. english

    What would be the possesive form of a noun?

    asked by Tony
  64. resistant materials

    What is pine?

    asked by georgia
  65. Physics

    can a virtual image be projected on a screen? thanks :)

    asked by konan
  66. SCIENCE!!

    what is a fulcrum, the effort and the load? also what is a Class 1 lever, Class 2 lever, and Class 3 lever? plz helpp! thanks:)

    asked by beeca
  67. chemistry

    Did mass appear to be conserved during this chemical reaction? In other words, did it look like there was more or less mass than what you started with? Simply describe what you saw, not what you think should have happened. Use complete sentences for your

    asked by Lorenzo
  68. psychology

    what is distingues the wechsler scales from the SIBS?

    asked by kelly
  69. Physics - please, please help me!

    A plane tries to head away from an airport at 500km/h[N], but finds that its true velocity is 450km/h[N35degreesE] due to headwinds. What is the velocity of the wind? I'm supposed to be using components, so for N-S I used 500+450sin(55 which got me 868.6

    asked by Sally
  70. science atoms

    Elements having 3 or fewer electrons in the outer energy level are classified as ____________________.

    asked by Twilight lover
  71. Physics

    How large is the current U.S. depth and the trade deficit in exponential notation?

    asked by Tammy
  72. Ochem Lab

    Suggest an appropriate reducing reagents for the following substrates and predict the reaction:(1) 2-hexanone, (2)ethyl 4-nitrobenzoate, (3) hexanal

    asked by sady
  73. physics

    I did a lab on refraction through water and my index of refraction was way off and I don't understand why? I did the experiment just as I was told but my results were still way off.

    asked by Lena
  74. Physics

    The nucleus of an atom has a charge of 65 protons. (a) What are the direction and magnitude of the electric field at 4.9 x 10^-10 m from the nucleus?

    asked by Mara
  75. geology

    Can you answer this please? What kind of climate coincides with the old Cotton Belt in the United States? How would you characterize it? The U.S. Corn Belt coincides approximately with Dfa climate, which is assigned what name in the North American climate

    asked by Tasha
  76. math

    if f(x)= x+2, find the equation of the function F obtained by stretching the function f vertically by a factor of 2 and compressing the function horizontally by a factor of 2, followed by a translation of 1/2 horizontally and -3 vertically. the equation

    asked by isha
  77. Child Care

    You overhear a group of children saying, "Girls can't be truck drivers." The most appropriate response is to A. use the opportunity to engage them in a discussion. B. ignore them: kids will be kids. C. redirect them to another activity. D. stage a

    asked by Ann
  78. English Ms. Sue

    Why is disharmony sometimes not the main cause of War?

    asked by Michele
  79. Math

    The directions say to use a grapking utility to approximate (to two-decimal-place accuracy) any relative minimum or maximum values of the function: y=x^3 - 6x^2 + 15 Can someone please help me because my graphing calculator is not working!!!

    asked by Kevin
  80. To Happy --

    Please repost your math question -- and remove Ms. Sue's and my screen names from YOUR NAME'S space. Thanks. =)

    asked by Writeacher
  81. science

    what is the difference between a chemical reaction ans physical separation.

    asked by nina
  82. math

    how do I solve this? (cos ө+1)/ (cos ө - 1) The answer is supposed to be: (1 + sec ө)/ (1- sec ө)

    asked by kayla
  83. Chemistry

    What happens to iron sulphide when heated an what happens to iron when heated?

    asked by Liza
  84. math

    in the examples of a computerized drilling machine that were presented in your reading material, downward movement of the drill bit toward the metal plate was in the

    asked by Anonymous
  85. probability/stat

    A lottery draws n numbers, values 1-N , from a hopper that replaces the number after it is drawn, i.e. probability of each number appearing remains constant. At the end, the winning number is drawn from the same hopper. What is the probability that the

    asked by rose
  86. Biochemistry

    Could someone please explain to me what Lineweaver Burk plot is trying to show? I know the definitions, and I know it represents the Michaelis-Menten equation, but I just need to know what it MEANS in simple English. Thanks!

    asked by Chris
  87. Social Studies

    Why Did European explorers claim land in North America?

    asked by Ryan
  88. math

    how do I solve these? (Tan^2ө)(Cos^2ө)+ (cot^2ө)(sin^2ө) The answer is supposed to be one but I don't know how to get it. 9sec^2ө - 5 tan^2ө The answer is supposed to be 5+4sec^2ө

    asked by kayla
  89. Social Studies

    In what ways did new Amsterdam have great diversity?

    asked by Ryan
  90. Chemistry/Dimensional Analysis

    The EPa detection limit for phosphate in water samples is 0.0450 milligrams per liter. Can phosphate be detected if 55.0 nanograms are found in 500.0 mL of solution? Show your calculations and explain.

    asked by Tyler
  91. SOCIAL STUDIES

    HOW DID MARTIN LUTHER KING AFFECT HISTORY

    asked by ARIEL
  92. psychology

    what is an example of the relationship between sensory adaption and negative adaption?

    asked by tom
  93. health

    can you please give me some information on how teen pregnancy has affected poverty within the last 10-20 years

    asked by Jason P
  94. Math

    you have 9 terms, the first is 0 and the 9th is 12 one of the outputs is 27 what is the equation for the pattern?

    asked by Ted
  95. English (Ms. Sue)

    How was self righteousness demonstrated in the war? How was disharmony demonstrated in the war?

    asked by Michele
  96. CRT205

    Do you find my answers after the piece of the article to be correct? Do you think my argument is, in fact, and argument? Clearly sheer numbers do not always impress us. It is unlikely, for example, that many Americans *Note: This essay borrows very heavily

    asked by Confused
  97. chemistry

    Solutions that have large amounts of solute are___ solutions that have small amounts of solute are ___

    asked by lyne
  98. organic chemistry

    explain why a thioester absorbs at a lower frequency than an ester in IR spectroscopy. Use inductive and resonance arguments in your explanation.

    asked by ladi
  99. Literature

    Who would be watching whom in Mary Shelley's "Frankenstein"?

    asked by Jaslyn
  100. math

    if the answer is "start at (0,0) and move 3 units to the right, " what is the question?

    asked by Rachel
  101. To: Troyer0269 - Sci245

    I've removed both of your science posts. Please repost when you can tell us what you've done so far to fulfill these complex assignments and where you specifically need our help.

    asked by Ms. Sue
  102. math help

    You recently started the paper work for your new homeand you were just notified you can move in , in t0 weeks.You then decide to hire a moving company,but are unsure which company to choose.You search on line and are interestted in contacting 2 companies,

    asked by tera
  103. English

    Why is fear the main cause of war? Need at least 3 to 4 examples on why it is?

    asked by Michele
  104. Social Studies

    What political party controls California? The nation?

    asked by Jaslyn
  105. religion

    what are the cultural and societal influences that have made Hinduism vital to the region in which it originated?

    asked by ph
  106. humanities

    What influences did Judaism have on the development of early Christianity? What do they have in common and what differences make them unique?

    asked by antwon
  107. English

    Why is religion an excuse for war instead of an actual cause? Why do people in the war use religion to justify themselves?

    asked by Michele
  108. Poetry

    Please give feedback on the below acrostic poems. I am in 9th grade so base it off of that. Follow me Over the rainbow Outside reality Towards the stars Sprint towards happiness Taciturn smiles whisk onto faces (or tackle fears or trust the path)

    asked by Anonymous
  109. Math

    Find the domain and range of the functon: f(x)=1/2 |x-2|

    asked by Dan
  110. Algebra 2

    Can someone please assist me with this? (9/49)^(-3/2) I do this thingy 1/(9/49)^(3/2) Then I do this thingy (49/9)^(3/2) Then I do this thingy (Square Root of (49/9))^3 I'm now lost...

    asked by PLEASE READ THIS TIME!!!!!!!!!!!!!
  111. history

    hi i need information to write an essay on the united states policy towards indians in the years following the civil war

    asked by bill
  112. English

    Why is religion sometimes not the cause of war?

    asked by Michele
  113. dynamics

    Find the mass center of a cylinder with height L and a hemisphere glued to the top with radius R. L=2R. The cylinder is standing up on its bottom end with hemisphere on top. Im so lost on this and cant use the formula to work.

    asked by spencer
  114. English

    Why is power and greed sometimes not the main cause of war? Why is disharmony sometimes not the main cause of War? few examples for each

    asked by Michele
  115. U.S. History

    Was Brown v. Board of Education the most important event in breaking down the legal foundations of the Jim Crow system? I want to argue yes, but I can't think of anything creative, only things that are obvious. Any ideas?

    asked by Demi
  116. math

    An Engineer is designing a bolt to fit a new machine. The bolt was the shape of a hexagon with a cymetrical hole in its center. The greatest distance across the bolt is 1.25cm, and the depth of 0.5cm. The diameter of the whole is 0.75cm while each side of

    asked by hector
  117. English

    Did Joe DiMaggio set at least 2 records? What records did Joe DiMaggio set? I need at least 2 records please? Please Help!! Thanks!!

    asked by SMILEY (I NEED MS.SUE OR WRITEACHER!!) HELP!!
  118. algebra need help

    Evaluate each expression. 3x^2-2x+1 if x=5 3a^2b^3 if a=2, b=-3

    asked by kate
  119. riddle

    what comes next? O,T,T,F,F,S,S,E,......

    asked by smiley
  120. college

    How does Planned Parenthood fund their programs?

    asked by Brooke
  121. math

    log(X/0.1)=0.14 how do i do this?

    asked by jeff helper
  122. humanities/social studies

    What does "The end justifies the means" means?

    asked by Anonymous
  123. science

    what is the difference between a chemical reaction and physical separation.

    asked by nina
  124. Math

    what is scale inteval

    asked by Bianca
  125. calculus

    solve what is the limit x->(pi/4) (1-tanx)/(sinx-cosx)

    asked by Anonymous
  126. English

    I need to do reasearch on "A Raisin in the Sun" and I'm having trouble answering this question: What was the status of African-Americans in the late 1950s? Why did they come to the North from the South and what they experienced when they got here? Include

    asked by Anonymous
  127. Business

    What is market size? How to calculate it? Thanks!

    asked by A
  128. psychology

    what is the relationship between sensory adaptation and negative adaptation?

    asked by heather
  129. algebra 1a

    x+4y=2(1) x=3-4y(2)

    asked by shekera
  130. fitness

    after looking at RPE's how well does it correlate with actual percent of maqx HR and pace?

    asked by cindy
  131. Chemistry/Dimensional Analysis

    The EPa detection limit for phosphate in water samples is 0.0450 milligrams per liter. Can phosphate be detected if 55.0 nanograms are found in 500.0 mL of solution? Show your calculations and explain.

    asked by Tyler
  132. ecology

    what is it called when birds waterproof their feathers by rubbing oil from body glands onto their feathers

    asked by Anonymous
  133. math, pre-statistics

    On a 3 day vacation to Seattle the local weather forecaster predicts a 60% chance of rain everyday.What is the probability that it will rain everyday of the vacation.(round to the nearest thousandth)

    asked by Sabrina
  134. CRT205

    Since it is the very nature of terrorism not only to cause immediate damage but also to strike fear in the hearts of the population under attack, one might say that the terrorists were extraordinarily successful, not just as a result of their own efforts

    asked by Confused
  135. algebra

    1. 8 less than a number is 15. find the number. 2. a number less than 8 is 15. find the number. 3. 5 times a number is 45. find the number

    asked by Peter
  136. misc

    is there any way to dye your hair without waiting so many hours i have asked before and GuruBlue told me about shampoo and food coloring which takes 8-12 hours. i was wondering if there was a quicker way and with what? thanks -MC

    asked by mysterychicken
  137. math/ algebra

    simplify the expression 5.6n-(4-2.5n) 2x^2-3-(4x^2-6) x+(2x-2)-(4y+3)

    asked by Peter
  138. Literature/Need Picture

    Could you help me find a good picture of "Life" I couldn't find anything on google images but maybe you can. Thanks for your help.

    asked by Starry
  139. psychology

    what causes you to be nervous even if you are good at what you are doing?

    asked by kelly
  140. Physics - I'm really, really lost

    A plane tries to head away from an airport at 500km/h[N], but finds that its true velocity is 450km/h[N35degreesE] due to headwinds. What is the velocity of the wind? I'm supposed to be using components, so for N-S I used 500+450sin(55 which got me 868.6

    asked by Sally
  141. Math

    what is 13 1/2 - 11 5/16?

    asked by Leah
  142. space

    how were stars made? by claire

    asked by Anonymous
  143. history-renaissance/middle ages

    How were women viewed in the medieval times? What would medieval men have said about Petrarch's (poet) view on women? thanks!

    asked by christina
  144. chemistry

    What happens if you heat jic and iron together? what happens if you heat jic and iron sulphide together/

    asked by Lizzy
  145. Physics

    How far does a photon (light) move in one nm in units of feet?

    asked by Christina AAAA
  146. history

    one more question. would medieval knights have fulfilled the idea of a well-rounded man? and would men of the middle ages have agreed with the major concern of a prince is to do anything to protect the stability of the country, even if it is harming the

    asked by anonymous
  147. science

    What is the Rf value for DDT pesticide?

    asked by melody
  148. Literature

    I have a question. I need 10 important dates on Walt Whitman if the teacher wants dates and some of the dates only have years. Does the years include dates ? For example: 1823 Whitman's father moves family to Brooklyn I can't find the date so should I just

    asked by Starry