# Questions Asked onMay 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.

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

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

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

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

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

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

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:

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,

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

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

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.

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

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

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

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.

17. ## math

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

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. http://www.sparknotes.com/lit/annefrank/ =) There are a number of sites here with information on Anne Frank and the Holocaust.

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

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

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

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

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. http://www.englishpage.com/verbpage/verbtenseintro.html

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

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,

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,

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:

28. ## english

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

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)

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

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!

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

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

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

35. ## CHEMISTRY

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

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

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

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

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

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?

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

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

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

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

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)

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

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)?

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

49. ## CHEMISTRY

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

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!!! http://www.foodproductdesign.com/articles/462/462_0695ap.html

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

52. ## CHEMISTRY HELP DR.BOB

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.

53. ## histroy

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

54. ## World History

Who is Athena Parthenos ? Athena Parthenos is the goddess for which the Parthenon is named after. http://en.wikipedia.org/wiki/Athena

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?

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

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

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. http://dicksonc.act.edu.au/Library/bibliog.html 2. (Broken

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

How would tariff help attain favorable balance of trade and balance of payments? Check the Accounting Dictionary's explanation of tariffs at this site. http://www.answers.com/topic/tariff

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? http://www.guardian.co.uk/climatechange/story/0,12374,905360,00.html

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

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

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.

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

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

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

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

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

70. ## Science

I have a science question

72. ## science

why isn't pluto a planet anymore? http://en.wikipedia.org/wiki/Pluto 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.

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