Questions Asked on
May 10, 2007

  1. Physics

    The four tires of an automobile are inflated to an absolute pressure of 2.0*10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile. Pressure*area= force. There are four tires.

    asked by Sarah
  2. chemistry

    Would the following errors cause an increase or decrease in absorbance and % Transmittance? insoluble particles were accidentally pipetted into the cuvette with the solution the cuvette was wet and not prerinsed with the solution. fingerprints were not

    asked by jared
  3. Econ

    - Explain the statement" The most unlikely problem of the national debt is that the government will go bankrupt." - Consider the statement: "Our Grandchildren may not suffer the entire burden of a federal deficit." (What is this like a trick question?) Is

    asked by Anonymous
  4. spanish

    lee las siguientes selecciones y completalas con la forma correcta del verbo entre parentesis. Ten mucho cuidado porque vas a necesitar various tiempos del indicativo y various tiempos del subjuntive, The numbers are where you have to conjugate the verb in

    asked by samantha
  5. Physics

    If you lay a steel needle horizontally on water, it will float. If you place the needle vertically into the water, it will sink. Explain why. It is because of surface tension. The hydrogen molecules bond with the steel of the needle. Look up surface

    asked by Anonymous
  6. Chemsitry II

    The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases. a) What is the mole fraction of each gas in the mixture? b) If the mixture occupies a volume of 11.5 L at 65 degress C, calculate the total number of

    asked by Jayd
  7. calculus

    A format for textbook page layouts is to be chosen so that each printed page has a 4-cm margin at the top and at the bottom and a 2-cm margin on the left and right sides. The rectangular region of printed matter is to have an area of 800 sq. cm. Find the

    asked by maricela
  8. MATH

    Which number is an irrational number? a) ã3 b) -13.5 c) 7/11 d) 1/ ã9 What is the definition of an irrational number? Since this is not my area of expertise, I searched Google under the key words "irrational number" to get these possible sources:

    asked by ben
  9. Chemsitry II

    mole fraction is equal to partial pressure divided by the total pressure Total pressure= sum of partial pressure use PV=nRT where n= number of moles equation become PV/RT=n make sure to convert the temperature to Kelvin and to use 0.0821 for R. V=volume,

    asked by Delli
  10. Chemistry

    A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was

    asked by Sara
  11. Biology

    If two people with normal vision have a daughter can she be colorblind? I tought that the answer would be no because it is sex linked and the second X in women makes up for the X that is colorblind that she might have but what if they are both carriers of

    asked by Ayeisha
  12. Chem

    Can somebody check this for me?? Ksp AgCl 1.8x10^-10 Ag2CrO4 1.0x10^-12 AgI 1.0x10^-16 Ag3Po4 1.0x10^-16 1. calc the [Ag+] and [Cl-] at equivalence point. I got 1.3x10^-5 2. Calc. the [CrO4-2] required to precipitate AgCr04 if the [Ag+] equals the conc.

    asked by Sara
  13. calculus

    Find the area of the largest rectangle that has its lower base on the x-axis and its upper vertices on the parabola whose equation is given by Y=12-x^2. i graphed the equation but its gives me a parabola, so i don't know what to do after that

    asked by maricela
  14. Calculus

    Find the intervals on which y=1/(x^2+1)^2 is increasing and decreasing. find the first derivative which is -4x/(x^2+1)^3 you should know that if the first derivative is positive, then the function is increasing and if it is negative, the function is

    asked by Icy
  15. Art

    Hi. I have to do a 8-paged paper on Egyptian art. I was wondering if anyone knew of any topics I could talk about. This is what I thought of so far: Gender roles in Egyptian Art Earliest forms of Egyptian Art The influence Egyptian art has had on other

    asked by hans
  16. Their Eyes Were Watching God- Archetypal Journey

    Does anyone know a website where I would be able to find about the archetypal journey in Their Eyes Were Watching God? I have to do a project where I have to take each step in the archetypal journey and tell what part of the novel that is.

    asked by Anonymous
  17. math

    customer arrive at a two server system at poisson rate 3 per arrival finding the system empty is equally likely to enter service with either arrival finding one cusomer in the system will enter service with the idele arrival

    asked by skl
  18. The Hoolocaust

    You should also make sure you read (if you haven't already) Anne Frank's book called The Diary of a Young Girl. =) There are a number of sites here with information on Anne Frank and the Holocaust.

    asked by Writeacher
  19. Chem

    A concentrated solution of ammonia is added to a solution of zinc oxide? NH3 + ZnI2 => ?? An excess of nitric acid solution is added to a solution of tetraaminecopper (II) sulfate. HNO3 + ? => ?? Zn forms the Zn(NH3)4^+2 ion. It MAY form some Zn(OH)2 at

    asked by Sara
  20. Economics

    (This homework question was removed due to a copyright claim submitted by K12 Inc.) I think the satellite is a public good but I'm not sure. I think it is necessary for the government to provide the communication satellites but I'm not sure about that

    asked by Christian
  21. French 1

    Rewrite the following Sentences using possessive adjectives instesd of de and the prepositional phrase. 1.le château du roi Son le château 2) L'appartement d'Annick Sa appartment 3)Son cousin est la fille de son oncle Son cousin est sa fille. Please

    asked by DANIELLE
  22. math

    consider a two server system which a customer is served first by server 1, then by server 2 and then departs. the server times at server i are exponential random variables with rate ui i = 1,2. a)When you arrive you find server 1 free and you find server

    asked by skl
  23. english

    i need a website for verb or verb phrase,and also for principal part of the verb This page has everything you need to know about verbs.

    asked by jax
  24. physics (for bobpursley, or anyone)

    Hey bob, its Mike and Jake. We wanted to start over on a new foot with you. We got assignment worth over 300pts, so far we getting 80% of the questions right, which is pretty good. We are stuck on some questions. We will tell you the questions and tell you

    asked by mike
  25. science

    The true speed of a moving car on the Earth, if you want to be very precise, would be the speed of the car with respect to the ground Is this true? yeah it is true yeah it is true The true speed of a moving car on the Earth, if you want to be very precise,

    asked by Haley
  26. Philosophy

    How did the greatest contribution of Rene Descartes affect the 18th and 19th-century philosophy? Thank you for using the Jiskha Homework Help Forum. Here are some sites for you to peruse. When you have decided for yourself the most important contribution,

    asked by Marie
  27. chem

    In a solution at constant H+ concentration, iodide ions react with hydrogen peroxide to produce iodine. H+ + I- + 1/2H2O2 --> 1/2I2(aq) + H2O The reaction rate can be followed by monitoring the appearance of I2. The following data were obtained:

    asked by Keith
  28. english

    what does FLOURISH mean in the context of shakespeare. ie. [flourish and shout] flourish v. flour.ished,, v.intr. To grow well or luxuriantly; thrive: The crops flourished in the rich bottomland. To do or fare well; prosper: ¡°No

    asked by serts
  29. Liberal Arts Math

    factor the polynomial completely: 2xy-3y-40x+60 2xy-40x-3y+60 2x(y-20)-3(y-20) (2x-3)(y-20)

    asked by Maria
  30. Physics

    After a long class, a physics teacher stretches out for a nap on a bed of nails. How is this possible? I have done that demo many times. One, make certain the nails are not sharp. Secondly, make certain there are many of them. I did them on 1in by 1in

    asked by Anonymous
  31. Math -Precal 11

    Show that the point P(7,7) is on the perpendicular bisector of the line segment joining A (6,-1) to B (0, 3). Also, verify that P is the same distance from A and B. For what values of k is the line y=l tangent to the circle (x-3)^2 + (y+2)^2 = 36? Thanks!

    asked by Dy
  32. Math

    The relationship between the speed of travel and the distance traveled can be described by the equation d=rt where d = distance traveled in miles, r = speed (or rate) of travel in miles per hour, and t = time traveled in hours. Graph this function when the

    asked by Kiki
  33. physics

    Praire dogs live in underground burrows with at least two entrances. They ventilate their burrows by building a mound around one entrance, which is open to a stream of air. A second entrance at ground level is open to almost stagnant air. Use Bernoulli's

    asked by mike
  34. Science Question

    Our class is studying the concave earth theory, which are our teacher suggests is the most viable theory for understanding the composition of the earth and the universe as a whole. However, I am having a difficult time comprehending the concave earth

    asked by Joey

    pH= 7.44 What is the ratio of [H2PO4^-]/[HPO4^2-] What does the pH become if 25% of the hydrogen phosphate ions are converted to the dihydrogen phosphate ion? What does the pH become if 15% of the dihydrogen phosphate ions are converted to hydrogen

    asked by Delli
  36. math

    customers arrive at a 3 gas station at an exponential rate 20 cars per hour.however customers will only enter the station for gas if som gas pumps are free.suppose that tthe amount of time required to service is exponential with a mean of five minutes for

    asked by skl
  37. Business and Technology

    I am soooo confused about "tariff", that its making me sick. Can you explain to me, is tariff good or bad. Who is it good for and who is it bad for. My understanding is that tariff is good for the goverment, but bad for the consumers. Is this a good way of

    asked by Ne Ne
  38. Scholarship money

    Does anyone know a good website where I can compete for a scholarship(NOT a college one)? Like a site where you have to write a poem or an essay or do something like that where a load of kids compete for a scholarship? I have to tell you frankly, most

    asked by brie
  39. chemistry

    An aspirin tablet weighing 0.548 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

    asked by jared
  40. spanish

    we have to conjugate the verbs in () into subjunctive and indicative, are they right? thanks! 6. Soledad hable con su amigo Hugo. Ella acaba de comprar billetes para un concierto fabuloso. Es cierto que Uds (23) (conseguir) billetes ayer para el concierto?

    asked by sarah
  41. chemistry

    Which of the following safety precautions is unnecessary for the 'Mass Percent of ASA' experiment? A. 1M NaOH is basic and corrosive. Skin contact should be avoided. B. Do not ingest the aspirin used in this experiment as it may be contaminated with other

    asked by jared
  42. Human Services Administrator

    I have to complete an internet search to find 3 examples of mission statements for human services organizations. Then I have to write 1050-1400 word paper evaluating the mission statements. Show how each one of the mission statements does or does not meet

    asked by Marie
  43. maths

    The ‘body mass index’ is used to find the body weight that is appropriate for a person’s height. It is calculated using the formula. I = W/H^2 (I = W divided by H squared) Where I is the body mass, W is the person’s weight in kg, and H is the

    asked by sarah
  44. Liberal Arts Math

    how would i solve this problem?? it says factor the polynomial completely: 2xy-3y-40x+60 I studied polynomials, but I don't know what it means to factor them. Do you have a definition in your textbook or notes or something? B-cuz then I'll be able to help

    asked by Maria
  45. spanish

    are the verbs in () in the correct tenses? THANKS 4. La madre de Tomas se queja porque el no hizo lo que ella le pidio. Ya es demasiado tarde. Ayer te pedi que me (13) (traer) leche del supermercado y se te (14) (olvidar). Lo siento. Te suplico que me (15)

    asked by sarah
  46. chemistry

    Which of the following is NOT true? A. A measurement contains significant figures and units. B. All numbers should be recorded from a digital readout. C. The uncertain digit is estimated between the last two markings. D. If an average of 4 trials is being

    asked by jared
  47. math

    How do you factor 3x^2-x-4? thanks in advance How do you factor 3x^2-x-4? thanks in advance 3 times what = 3? 3 of course. giving you (3x+/-a)(1x+/-b). a and b can only be 1 and 4 or 2 and 2. Can you take it from here? (3x-4)(x+1)?

    asked by Diana
  48. English

    I posted this yesterday, that I need to modernize an Ancient Greek myth. bobpursely replied with an idea that I could do the Siren sisters as cheerleaders, but I couldn't find a myth about them, they're in two different myths. Like I've been thinking of

    asked by Raj

    pH= 7.44 What is the ratio of [H2PO4^-]/[HPO4^2-] What does the pH become if 25% of the hydrogen phosphate ions are converted to the dihydrogen phosphate ion? What does the pH become if 15% of the dihydrogen phosphate ions are converted to hydrogen

    asked by Delli
  50. Foods & Nutrition

    I tried finding the answer online, but I couldn't find anything. Here it is: Describe the process of testing containers to see if they are microwave oven safe. Thanks!!!

    asked by Emily
  51. algebra

    factor 5x^2-x-12 please help me That does not factor into monomials with integers. It can be written as 5(x-1.6524..)(x+1.4524..) okay thankya

    asked by Mimi

    WHAT IS PK2? pK2 for H3PO4. Look in your text for k2 for H3PO4. My text, but it's an OLD OLD one lists k2 of 6.2E-8 and pK2 = 7.21. DRBOB. It is the same in my reference as well, 6.23E-8 or pK2=7.21 at 25C.

    asked by Delli
  53. histroy

    How can large firm and small firms could utilize change management concepts to meet growing technology demands merge .

    asked by Trenet
  54. World History

    Who is Athena Parthenos ? Athena Parthenos is the goddess for which the Parthenon is named after.

    asked by Katia
  55. math

    consider the stracture with 7 components such that each of them with probabilty p works independently A) find the minimal cut and minimal path sets? B)Find the reliablity for the stracture function?

    asked by skl
  56. electron capture?

    As the question before, with the electron replaced by a proton, i thought that the electric and gravitaional forces would increse, with the electron capture mass proportion and that the direction of forces would reverse as they charges reverses, is this

    asked by honey
  57. maths

    how do i slove this equation?? x ^2 – x = 0 First you can factor it. x(x-1) = 0 In order for their product to = 0, one of the two terms, x or x-1, must be 0. What does that leave you for the other possible value of x? I hope this helps. Thanks for

    asked by sarah
  58. Language Arts

    How do I do a Bibliography for an interview? Thank you for using the Jiskha Homework Help Forum. Here are some sites on how to write a Bibliography and the second one is good for an interview: 1. 2. (Broken

    asked by Erica
  59. Liberal Arts Math

    show work simplify:(a-9b)(a+3c) (a-9b)(a+3c) a^2+3ca-9ba-9bc I'm pretty sure this is how you do it... plz check some standard formula to remember are; i: (a+b)^2=(a+b)(a+b)= a^2+2ab+b^2 ii: (a-b)^2=(a-b)(a-b)=a^2-2ab-b^2 iii: (a+b)(a-b)= a^2-b^2 look at

    asked by Maria
  60. Business and Technology

    How would tariff help attain favorable balance of trade and balance of payments? Check the Accounting Dictionary's explanation of tariffs at this site.

    asked by Ne Ne
  61. Environmental Issues

    My science teacher says that cattle flatulence is destroying the ozone layer. If this is true, what can we do to regulate the flatulence output of cattle in order to preserve the ozone?,12374,905360,00.html

    asked by Joey
  62. HELP

    i keep getting this error when I type my assignment in, You are not allowed to post internet addresses. If you own a website and would like Jiskha to link to it, please contact us. but there is no internet address. AH! Look for a www in your text. there

    asked by sarah
  63. algerbra 1

    5x+8+3x-x+5=6x-3 do I start like this 5x+3x-x or 5x+3x+8+5=6x-3 I would go: 5x+3x= 8x then: 8x-x+13=6x-3 and then: ...hold on, what do you think so far, like, am I way off what you are thinking or should I keep going? I don't know I am confused but then

    asked by patti
  64. Calc

    Determine the max & min of g(x) = x(x^2 - x^3)^3 Get the derivative of the function and set it to zero, then solve for x.

    asked by Icy
  65. MATH

    Find the digits that represent the letters E, F, G, and H to satisfy the following puzzle. Each letter represents a different digit. EFGH x 4 = HGFE 2178 x 4 = 8712

    asked by ben
  66. mat 116

    a busleaves a station at 1 pm, traveling west at an average rate of 44 mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart? The distance traveled apart in the first

    asked by Anonymous

    when I use henderson-hasselbach Ka of HOP4^2- = 4.8 x10^-13 pKa= -lg(4.8 x10^-13)=12.3 substituting I get 7.44-12.3 = lg [base/acid] e^-4.86=[base/acid}= 7.75 x10^-3 according to my textbook this answer is incorrect and should be 0.59 Please Help! IF you

    asked by Delli
  68. Math

    3 times the square root of 3. Would I be right in saying that just writing it with the square root form is right? So here's my equation: (3* sq. rt. of 3) divided by 2. Help? 3/2 sqrt 3 is the accepted way

    asked by Emily
  69. Alg II

    When you are solving a matix equation and the determinant of your coefficient matrix is zero, how can you determine when it is a no solution versus an infinitely many solution? nvm i figured it out. you have to determine whether the system is consist or

    asked by Brenda
  70. Science

    I have a science question

    asked by Yuku
  71. Science

    I have a science question Unless you actually ask the question, we cannot help you. Please repost with your question.

    asked by Yuku
  72. science

    why isn't pluto a planet anymore? Because Pluto's orbit crosses those of the other planets therefore makeing it ineligible to be a planet for not meeting certain standards that have been lain out.

    asked by Carina
  73. Philosophy (Logic)

    I need help constructing a formal proof of validity for the following: 1. B(L•D), ~D, so ~B 2. R v (S•~T), (R v S) -> (U v ~T), so T->U 3. A -> ([E•~G) ->M], ~ (~E v G) -> (M -> F), so A -> [~ (~G -> ~E) ->F

    asked by Abby
  74. algebra

    the equation 6y=9-3x What do you want done with this equation? solve for x 6y=9-3x

    asked by forest
  75. art

    I nee to know about African art and what makes it distinctive -has anyone got any ideas thanks Thank you for using the Jiskha Homework Help Forum. Here are some links for you to peruse: 1. 2.

    asked by flubba