Questions Asked on
August 6, 2007

  1. physics

    A 120 kg mass is blown apart into an 80 kg piece and 40 kg piece. after the blast, the two masses are moving apart with a relative velocity of 60 m/s. the total kinetic energy after the explosion is: A. 21 kJ B. 35 kJ C. 48 kJ D. 56 kJ E. 82 kJ Because of

    asked by mandy
  2. physics

    A bat flying at 5.5 m/s emits a chirp at 35 kHz. If this sound pulse is reflected by a wall, what is the frequency of the echo received by the bat? ______ kHz (Assume the speed of sound is 345 m/s.) thanks for any help

    asked by physics22
  3. physics

    Which of the following is a True Statement? PLEASE EXPLAIN ANSWER A) It is possible for heat to flow spontaneously from a hot body to a cold one of from a cold one to a hot one, depending on whether or not the process is reversible or irreversible. B) It

    asked by stanbee
  4. English

    What, if anything, is wrong with the following sentence. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. a. Properly constructed sentence b. Comma splice c. Lacks parallel parts d. Unclear pronoun This is a properly

    asked by AA
  5. physics

    Hi, can you help me with this one? A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 75.0 dB. This intensity level is too loud for your baby, who yells at 65.5 dB. (a) What total sound intensity engulfs you?

    asked by sanchi
  6. books

    What is the author's tone of Maniac Magee? Is it light-hearted, humorous, serious, sarcastic, intense, or depressing? What do you think? I think it's serious but i can't explain why. Is it because even though people think Jeffrey is a crazy kid, the author

    asked by astrid
  7. Chemistry

    write a balanced equation for the combustion of benzene. All hydrocarbons, like benzene are, are the same. Add O2. C goes to CO2 and H goes to H2O. C6H6 + O2 ==> CO2 + H2O I will let you balance it. Let me know if you have a problem with it. would it be...

    asked by Anonymous
  8. physics-vectors

    If the magnitude of the sum of two vectors is greater than the magnitude of either vector, then: If the magnitude of the sum of two vectors is less than the magnitude of either vector, then: a. the scaler product of the vectors must be negative b. the

    asked by mekeke
  9. Biology

    Explain how the lacfk of genetic diversity found in populations of endangered species might hinder their recovery Genetic diversity is needed to cope with environmental changes. With genetic diversity, if there are large changes in the environment, at

    asked by Tim
  10. basic math

    In my book A bread piece calls for 3 1/4 cups of flour if you only have 2 1/8 cup. How much more flour is needed? 3 1/4 -2 1/8= 13/4 - 17/9 how does it equal 13/4 can someone show me that part? I thought I knew how to subtract fractions but I don't get it.

    asked by chrissy
  11. Math

    This needs to be solved and put in equation form. Seems simple but not sure if I am figuring it right. Jill has $3.50 in nickels and dimes. If she has 50 coins, how many of each type of coin does she have? use the equations and solve n ---> number of

    asked by Joy
  12. chem- IP and Ksp

    A solution with a pH=6.00 is 4.0E-3M in each of the metal cations Mn2+, Fe2+, Co2+, Ni2+, and Zn2+ and 0.10M in H2S. Under these conditions, which of the metal cations will be precipitated as a sulfide? Hint: Calculate IP. General Equilibrium MS(s) +

    asked by DfB
  13. English

    For a Raisin in the Sun, I have to draw and label a diagram of the stage. On the page, typed are: up stage, down stage, audience, stage right, and stage left. I don't get it, like what am I supposed to do, draw the kitchen, the couch in the living room, or

    asked by Anonymous
  14. Biology

    The amplification of recombinant plasmids occurs by? Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://vir.sgmjournals.org/cgi/content/abstract/70/6/1347 2.

    asked by Sabrina
  15. chem

    Forty-two grams of benzoic acid is treated with concentrated nitric acid in some sulfuric acid. Forty-two grams of the major expected organic product is isolated. What is the percentage yield for this experiment? Give an equation with structural formulas

    asked by Damon
  16. physics

    hi im having trouble with this i think the answer is zero! can u guys double check ty if there are three blocks tied together, with a force enacted on the first block, the net force on the middle block is..... a. zero b. F/3 c. F/2 d. 2F/3 e. F This cannot

    asked by Damon
  17. math

    Prove the following: if, in a triangle ABC,BA =CB O in atriangle mÐ BAO = mÐ OAC = 20°, mÐ ACO = 10°, and mÐ OCB = 30°, then mÐ OBC = 80°.

    asked by nbvhj
  18. Algebra

    Stuck on this problem Find values for m and b in the following system so that the solution to the system is (-3,4) 5x+7y=b mx+y=22 5(-3) + 7(4) = b b = -15 + 28 = 13 m(-3) + 4 = 22 -3m = 22-4 m = 18/-3 = -6 Thank you Sanchi....I will use this as a template

    asked by Misty
  19. English

    In the poem "Dream Deferred" by Langston Hughes, what does the term "dream deferred" mean? Also, in the US, what are some groups that have been exposed to predjudice? I have some: African Americans, immigrants Can anyone think of any others Any dream that

    asked by Anonymous
  20. algebra

    i need help finding the base. this is the equation i got after work it out halfway. 42/h+h+sqroot(42/h)^2+h^2=20 ft how can i find B & H. How should i go about. Thanks. Isnt the sqrt of (42/h)^2 just 42/h ? Then, multipy both sides of the equation by h,

    asked by q
  21. vectors

    Given the vectors v=-2i+5j and w=3i+4i, determine (do I just plug what is given? but how would I find the length? is there a special way to solve vectors?) 1. 1/2 v 2. w-v 3. length of w 4. the unit vector for v Use the pythogrean theorm to find length of

    asked by Anonymous
  22. Math

    I need to find the value of x. 5(x-4) = 3(x+8) Trying to help my niece and haven't done this stuff for 20 years. :) 5(x-4) = 3(x+8) 5x - 20 = 3x + 24 5x - 3x = 20 + 24 2x = 44 x = 22 I hope this brings back the algebra you studied 20 years ago. :-) By the

    asked by Beth
  23. Finacial

    Develop a set of pro forma financials (income statement and balance sheet only) for the next fiscal year-end using the percent-of-sales method. Assume that the company's sales have increased by 15%.for Exxon corp. balance sheet and income statement can be

    asked by david
  24. reading

    i need to know what is the theme of the story "the face on the milk carton" Check these sites for information about themes in novels. Then you can make your own decision about the theme of The Face on the Milk Carton.

    asked by tracy
  25. Art... Color

    Hello, My answer for the following question is #3 ... Can Some one please tell me if I have the correct answer? Thank You To make objects appear to recede into the background, your best bet would be to 1. use fully saturated hues. 2.accentuate details.

    asked by Mandi
  26. reading

    i really need to know the them for "the face on the milk carton". can anyone help me? Thank you for using the Jiskha Homework Help Forum. Sorry, but your question is not clear. If you mean "the theme" it is to try to locate the missing children pictured on

    asked by tracy
  27. Algebra

    Divide 1-125b^3 by 5b - 1 You need to learn the technique of polynomial long division. It's just the same as if numbers were involved. See http://www.sosmath.com/algebra/factor/fac01/fac01.html for sevaral examples. Hint: It will be a three-term

    asked by Juri
  28. maths

    Veronica bounced a ball from the roof of the school which was 16m high. The first bounce reached up to 8m, the next bounce was half as high again. How high would the fifth bounce have been? Do the numbers and see what you get. There are only four more

    asked by JaredN
  29. maths

    I have 2 coins, how much money might I have? How many different amounts might I have? List the possible combinations of 1, 5, 10, 25, 50 and 100 cent coins, in pairs, with the order unimportant. (A penny and a nickel is the same as a nickel and a penny,

    asked by JaredN
  30. mythology

    where can i find a script of troy? Place the URL below into your browser. You can do that by copying and pasting. http://www.google.com/search?hl=en&ie=ISO-8859-1&q=Troy+%2B+script&btnG=Google+Search

    asked by klar maesen
  31. Math

    Need equation form for this number problem. Theater tickets are $8 for general admission and $5 for students. During one evening 240 tickets were sold, and the receipts were $1680. How many of each type of ticket was sold? use the equations and solve g

    asked by Lynn
  32. geometry

    i am lost on this one TAKE Three points K,L,M on sides BC,CA,AB of the triangle ABC. Prove that at least one of the triangles AML,BKM,CLK has area less than or equal to 1/4 area of triangle ABC

    asked by saurabh shado
  33. Honors English

    I'm doing a project on greek gods and I can'ty find any pictures on apollo.Please help. Hmmm. Did they have kodak cameras in mythology? Here is what Michangelo perceived he saw: (Broken Link Removed) Here are some other "pictures": (Broken Link Removed)

    asked by Chloe
  34. Marketing

    Select a company and product (real or imaginary). Use the Internet to find 5 websites that provide the types of information and data that you would use in a marketing information system for that company. You need to find information, data, and/or

    asked by sarah loid
  35. Algebra

    Factor out 8x^3y^6 + 27 One factor is 2xy^2+3. (The sum of the cube roots of the first and last terms). Use long division to compute (8x^3y^6 + 27)/(2xy^2 + 3) to get the other factor

    asked by Juri
  36. Math

    2x(5*2-3) > x(3-5)-2(x-1) the answer I have got is x > 2/18. Can someone please tell me if this is the correct answer? 2x(10-3) > -2x - 2x + 2 20x - 6x > -4x + 2 18x > 2 x > 2/18 correct! sorry! simplify x > 1/9 Thanks i thought it was right b/c i tried to

    asked by Karla
  37. Maths

    How can you get 6666 on a calculator without touching the 6 button? How many different ways can you do it? By adding and subtracting alone, there are an infite number of ways

    asked by JaredN
  38. Math

    What is the value of a in terms of b? 3ab=6 Divide both sides of that equation by 3b to get an equation with only a on one side. Convert the 6/3 to a 2. 3ab=6 ab =2 a =2/b

    asked by Analise
  39. English

    In the book "Of Mice and Men", in section 1, Describe the setting. What is the name of place? What does theplace look like? Time in history? Time of year? Is the name of place the Salinas river, a few miles south of Soledad, near the Gabilan mountains? Is

    asked by Anonymous
  40. chem- IP and Ksp

    A solution with a pH=6.00 is 4.0E-3M in each of the metal cations Mn2+, Fe2+, Co2+, Ni2+, and Zn2+ and 0.10M in H2S. Under these conditions, which of the metal cations will be precipitated as a sulfide? Hint: Calculate IP. General Equilibrium MS(s) +

    asked by DfB
  41. accountingI

    how will the fundemantal accounting equtation (assets=liabilities+owners equity) change if supplies are purchased on account? explain how tgis purchase will or will not change the owner's equity? i thought maybe if the company buys 1000.00 on office

    asked by queen
  42. axia university

    How do you think slavery influenced the evolution of both blak and white America today? http://www.jiskha.com/search/search.cgi?query=slavery+influenced+the+evolution+of+both+black+and+white+America+today Be sure to go through these and read the answers

    asked by Anonymous
  43. math

    4 E n^2/2 n=0 If I remember correctly, this is how you solve this problem... 0/2 + 1/2 + 4/2 + 9/2 + 16/2 = 15 3 E 1/n^3 n=1 1/1 + 1/8 + 1/27= 251/216 You have it. There are other ways also. For instance, if you had a sum from n=1 to 9054, summing might be

    asked by Anonymous
  44. Biology

    To ensure that the mother will have mature egg cells svailable for in vitro fertilizstion she must be treated with chemicals that regulate her reproductive cycle, Explain what these chemicals thst regulat both the female snd msle reproductive cycles are

    asked by Tim
  45. English

    What, if anything,is wrong with the following sentence? a. Properly constructed sentence. b. Comma splice c. Lacks parallel parts d. Unclear pronoun Please type the sentence. Also, indicate what you think is wrong with the sentence.

    asked by AA
  46. computer progaming

    can anyone give me infomoration on Novell Enterpise open server im helping my dad with his online class homework and i was wondering if i can get help? Ah...the days of homework have changed. It used to be that parents had to help their kids with homework.

    asked by nate
  47. English

    The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. Since it is a business letter, would "you" be an unclear pronoun? Yes. How would you make it more formal? I would replace

    asked by AA
  48. English

    The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. I would replace "you" with "one". Would that be correct? Yes. That's correct.

    asked by AA
  49. English

    What, if anything, is wrong with with the following sentence? Do you advise me to go to college or that I should get a job after high school. a. Run-on b.Misplaced part c. Lacks parallel parts d. Properly constructed sentence. I believe the answer is c. I

    asked by ds
  50. algebra 2 please help

    Give the answer with the appropriate unit of measure.. (2 revolutions)*(60 seconds) _____________ ___________ second minute 120 rev/min (abbreviated rpm) The "seconds" dimension cancels out

    asked by logan
  51. math

    6x8+56x34 +n I'm not sure what you are asking. 6x8=48 56x34=1904 48+1904+n = 1952 + n I hope this helps. If not, repost with more specific information. Thanks for asking.

    asked by georgettte
  52. algebra 2..PLEASE HELP!!!!!!!!!!!

    GIVE THE APPROPRIATE ANSWER FOR THE MEASUREMENT.. 2 REVOLUTIONS PER SECOND TIMES 60 SECONDS PER MINUTE 120 revs / min 2revs/sec x 60 sec/minute = 120 rev/min

    asked by logan