Questions Asked on
January 30, 2009

  1. Physics

    1. A flowerpot falls from a windowsill 25.0 m above the sidewalk. a. how fast is the flowerpot moving when it strikes the ground? dont i need to know the time it takes, what formula am i supposed to use for this? would 25 m be the displacement? b. how much

    asked by y912f
  2. chemistry

    Hello! my question is. Cumulene has chemical formula C4H4 with 7sigma and 3pie bonds. the 2 outer C atoms have a hybridization of "sp2", the H atoms have a hybridization of "s", and the 2 C atoms in between have "sp" hybridization. As I figured out, there

    asked by Jam09
  3. physics

    a person pushes a box across a horizontal surface at a constant speed of .5 meter per second. the box has a mass of 40 kg and the coefficient of sliding friction is .25. The power supplied to the boxx by the person is... please Explain!!

    asked by hana
  4. math

    Three students from grades 10,11 and 12 were elected to the student council. Grade 10: Tom(T), Sally(s) and Bill(B) Grade 11: Jerry(J),Anne(A)and Connie(C) Grade 12: Dan(D), Martha(M) and Gwen(G) A three member committee is to be formed with one person

    asked by Katie
  5. biology

    A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50–L container of cold water, what would be the approximate increase in the temperature of the water?

    asked by Jack
  6. economics

    A perfectly competitive painted necktie industry has a large number of potential entrants. Each firm has an identical cost structure such that long-run average cost is minimized at an output of 20 units. The minimum average cost is $10 per unit. Total

    asked by adele
  7. Physics

    please show me how to solve these: 1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway? answer=3.00 h 2. How much time would Simpson save by increasing his average

    asked by y912f
  8. Physics

    a car is accelerating at a uniform rate of 0.85 m/s^2. what is the magnitude of the car's displacement as it accelerates uniformly from a speed of 83 km/h to one of 94 km/h? i tried a formula that solves for displacement and uses initial and final velocity

    asked by y912f
  9. Math

    how do you find the constant of variation k for the direct variation? for example, 4x + -6y. how do you find k?

    asked by Angie
  10. statistics

    The mean GPA (grade point averagE. of all male students at a college is 2.77 and the mean GPA of all female students at the same college is 2.89. Suppose we take one sample of 40 male students and another sample of 50 female students from this college.

    asked by Lee
  11. Physics

    please show me how to solve this 1. A bus travels 280 km south along a straight path with an average velocity of 88 km/h to the south. the bus stops for 24 min. then, it travels 210 km south with an average velocity of 75 km/h to the south a. how long does

    asked by y912f
  12. Algebra

    Carmella has $1200 invested in two stocks. One returns 8% per year and the other returns 12% per year. The income from the 8% stock is $3 more than the income from the %12 stock. How much did carmello invest in each stock? B) wrtie an equation about the

    asked by Yasmin
  13. Chemistry

    I have 3 Questions: We actually did the lab experiment for this, but I have no idea whether my reasons are correct. 1) For the equilibrium system Fe+3 + SCN- FeSCN+2, what would happen if you add 2 drops of Fe No3?. Which way will the equilibrium shift

    asked by nate Leung
  14. Geography

    i need to label a diagram of the drainage basin of the River Tees. the words i have got to use are:- Tributary Mouth Confluence Source Reservoir Also i need to colour the diagram to show the relief of the drainage basin. A)Shade the river and its

    asked by ZAC
  15. chem

    write a mechanism for the reaction of sodium chloroacetate with 4-chlorophenolate. - i know its a sn2 mechanism, but I don't know who to go about from here

    asked by jason
  16. math

    Four large oranges are squeezed to make six glasses of juice. How much juice can be made from six oranges.

    asked by Ryan
  17. Chemistry

    Assume that the element 107Uns is synthesized and that the sample contains 39.8% 270Uns (269.4 amu), 35.2% 271Uns (270.3 amu) and 25.0% 272Uns (271.2 amu). What is the value of the atomic weight? A. 270. B. 269.3 C. 270.4 D. 271

    asked by Soonjung
  18. math

    A rectangular field is four times as long as it is wide. If the perimeter of the field is 750 feet, what are the dimensions of the field?

    asked by cindy
  19. Psych

    CAN SOMEONE REVIEW MY ANSWERS AND TELL ME IF THIS IS CORRECT? Why is it flawed to ask how much of a particular behavior is due to genetics and how much is due to experience? It is inconsistent to think that behaviors are solely due to our genetic make-up.

    asked by SinnerSaved
  20. Trig

    Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(-lnx) I know the rules I just don't understand how they apply.. thanks!

    asked by Alli
  21. english

    what are 2 figurative devices from obama's inaugural speech?

    asked by mike
  22. music

    I need to find the definition of harpsichord and also 4 examples of harpsichord. thanks

    asked by Deacon
  23. Physics

    Please check these answers[my letter choice is in CAPS]: 1. In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses? A. interpreting results b. stating conclusions c. conducting experiments d.

    asked by y912f
  24. Math

    Help with these problems would be greatly appreciated: 1.Find the definite integral of dx/(x(1+ln(x))from e^6 to 1. 2. Solve for x in terms of k for log[2,x^6)+log[2,x^10=k. (its log base 2) 3.Solve log base 3(log base 3, x)=-2

    asked by Angelina
  25. Physics

    The professor gave us no background material or explanations for any of these questions. 1. Imagine that molecules of H20 are stacked up in a cubic array, like a large number of cubical boxes. Each water molecule is taken to be at the center of each cube

    asked by jm
  26. Statistics

    Construct the appropriate control chart for the observations listed below, using 3 sigma limits. Product Number - Number of defects 1 - 3 2 - 3 3 - 6 4 - 5 5 - 3 6 - 5 7 - 2 8 - 2 9 - 3 10 - 4 11 - 6 a. Determine the upper and lower control limits. b.

    asked by Johnny
  27. IT 205

    Highlight the most important differences between object-oriented programming languages and generations 1-4 of (often called top down or structured) programming languages. How are they similar?

    asked by Adebayo
  28. World Geography

    I need an acronym to remember the Canadian provinces. Any help?

    asked by Amy
  29. statistics2

    A textbook publisher wants to determine process control charts for the textbook height. The following table shows the first 20 samples of n=4 sample size of the production of the text. Sample - X Bar - Range 1 - 10.01 - .01 2 - 9.97 - .04 3 - 9.98 - .03 4

    asked by Johnny
  30. Chemistry

    If a catalyst is introcuced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air

    asked by Lumina
  31. Physics

    The professor gave us no background material or explanations for any of these questions. 1. A contemporary computer chip dissipates 54 watts of power on a area of 1 square cm. due to the transistors inside this area. Assuming that transistors in succeding

    asked by jm
  32. PreCalculus

    I am having a lot of problems with this linear programming problem. CAn someone help? A farmer buys two varieties of animal feed. Type A contains 9 oz. of oats and 2 oz. of corn per pound. Type B contains 5 oz of oats and 10 oz of corn per pound. The

    asked by Joanie
  33. English

    Two main positive values are expressed by the writers in Fire on the Water: to have the determination to do what’s right, despite other people’s views and beliefs, and to respect and embrace one’s heritage and native roots. These values can be

    asked by Lilah
  34. Physics

    i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn

    asked by y912f
  35. history

    I need help with unscrambling these letters into 2 words ecnoevprmisrirtam.only hint it has to do with canada.

    asked by c
  36. calculus

    Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 6 x^6 , y = 6 x , x >= 0 Find the volume V of this solid.

    asked by bob
  37. english

    i need figuartive devices from obama's speech - can sue explain her example

    asked by mike
  38. spanish sra jmcguin

    this is the assignment I'm supposed to do a draft essay on helping a high school senior with improving his grades. 3 recommendation as his friend and there explanations, along with introduction and conclusion sentences. Only one paragraph the next posting

    asked by sam help please
  39. Math - check my answers :)

    1. Find the amplitude, if it exists, and the period of y=tan 1/4È Answer: No limits in amplitude, y=tanÈ/4 period is 4pi 2.Solve x = Arctan(-sqrt3) Work: Pythagorean theorem: sqrt(1^2+3)= sqrt4=2 in length. Triangle is 1, sqrt 3,2 Answer: -60° 3. In

    asked by Grace
  40. Humanities

    The style that fills the picture space with figures and uses bright colors and lots of gold is called? a. Romanesque b. Renaissance c. three-dimensional d. gothic e. none of the above

    asked by Marilu
  41. biology

    Can someone explain to me how 2,3 BPG works for hemoglobin? BPG affects oxygen binding affinity by binding in a small cavity at the center axis of deoxygenated hemoglobin. In oxygenated hemoglobin, this cavity is too small to effectively accommodate

    asked by jason
  42. Math

    I need help on this problem: 8+9-10 I just don't understand if you do that 8+9 part first or the 9-10 part first Can you just tell me the steps to it? Thanks! -MC

    asked by mysterychicken
  43. Introduction to Psychology

    Okay I have to do short paper on my results for a survey that I did to determine which branch of psychology I would be best suited for. My results were Behavioral: 20, Humanistic: 20, and Psychoanalytical: 17. I think my main problem is getting all of the

    asked by Lauren
  44. English

    put forward an argument for macbeth to be the next king i don't know how to do this i don't have any info please help me

    asked by Numz
  45. Physics

    Why does a pencil look broken if you hold it at an angle in a beaker of water?

    asked by Nabiha
  46. physics

    A moto of a crane is lifting a 100 kg load 20m high using 25 kj of electrical energy. calculate the efficiency

    asked by naomi
  47. Physics

    for this question the answer is 680..the answer i get is 684 please help 1. it takes you 9.5 mins to walk with an average velocity of 1.2 meters per second to the north from the bus stop to the museum entrance. what is your displacement? i did: 9.5 *

    asked by y912f
  48. chemistry

    ii) What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

    asked by candi
  49. Physics

    sorry for reposting this but im really stuck Simpson drives his car with an Vavg of 48.0 km/h to the east. how long will it take him to drive 144 km on a straight highway? i got the answer to that as 3 hours but i cant do this: how much time would he save

    asked by y912f
  50. Chemistry

    Is there a correlation between temperature change with the changes on the molecular level? And what is it? (talking about changes in phases with melting and heating. and the temp corresponds to the time it takes for each phase to melt, vaporize, etc.) (on

    asked by Kara
  51. trigonometry

    show that 1-cos^2t divided by sin^2t =TANt

    asked by Craig
  52. Chemistry

    If a catalyst is introduced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air

    asked by Lumina
  53. Physics

    please check if these are right 1. Which of the following is the equation for average velocity? a. Vavg=delta x/delta t b. Vavg=delta t/delta x c. Vavg=delta x *delta t d. Vavg=V1-Vf/2 i picked A 2. Suppose you are given a position versus time graph. the

    asked by y912f
  54. Cultural Diversity

    Post a 200- to 300-word summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of

    asked by Squirrel
  55. math

    can someone give me proof that a negative number times a negative number is a positive number I've always been told this in like seventh grade that it is but havne't been given any proof

    asked by Math
  56. Science

    how do you read graphs showing direct variation and inverse variation??

    asked by Angie
  57. spanish sra jmguin

    Santiago, estás sacando notas malas. Primero, insisto en que tú limites tiempo con tu novia o que estudies con ella. Tu novia te puede ayudar en tus estudios. Segundo, te recomiendo que tú decidas entre tocar la guitarra o jugar para el equipo de

    asked by sam help please
  58. English

    I am trying to find out who (or which companies) own Australian channels 7,9 and 10 and also SBS. I have looked on various websites all with different anwsers. Can someone please help me find the correct answer. Thanks.

    asked by Nat
  59. science

    give a details history about the evolution of man from stone age till modern age, with pictures

    asked by Tosin osemeobo
  60. calculus

    Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area S of the region. y=sqrt(x) , y=1/2 x , x=25

    asked by ken
  61. Algebra

    I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks

    asked by Caleb
  62. Ladybug -- Appendix C

    I've removed your post because Jiskha volunteer teachers do not have access to Axia materials -- such as Appendix C. I suggest you consult your instructor or other students if you want help on this assignment.

    asked by Ms. Sue
  63. French

    How would you say 'hidden talents' in French? Would it be something like "Est-ce que tu as des talents caches?" (With the accent, I'm on a laptop and it won't let me type it"

    asked by Samantha
  64. math 012

    Hi, I am trying to do homework for my math 012 class- solving linear equations- and I need help with 9 of the problems. I would really appreciate any help with this. I can do the problems and send them to you, or however you prefer. Thanks!

    asked by amy
  65. Anatomy

    What lipoprotein is associated with cholesterol and the production changes in blood vessles?

    asked by Lori
  66. science

    freshwater resource challenge

    asked by fay
  67. Com220

    When might bias not interfere with credibility?

    asked by Malkia
  68. Macroeconomics

    Would Interest on both government and corporate bonds would be included as part of interest income in determining the GNP by the income approach

    asked by Jim
  69. Social Studies

    Hi, Can you please tell me a good definition for Cultural Diffusion? I think it is the spread of culture and ideas. Is that correct, or do I need to add something. Thank You....

    asked by Happy Face
  70. theology

    what do they mean when they tell you to comment about someone's religous imagination?

    asked by cathia
  71. math

    sketch the graph of y^2=(1/4)x

    asked by ben
  72. Math

    how do you solve this: 2^3(5^0-6m^2)

    asked by Angie
  73. Algebra

    Why is the line x=4 a vertical line

    asked by Kellly
  74. math

    The region under the following curve is rotated about the x-axis. Find the volume of the resulting solid. y=13tan(x)^2, 0

    asked by jach
  75. question

    Are relationships better explained through staged theories or through dialectives?

    asked by sally
  76. science245

    how do fossils help in determining the relative age of strata?

    asked by dianne
  77. 4th grade

    what is prime and composite 13,37,25,117208,67

    asked by Paige
  78. Macroeconomics

    How do I find depreciation does anyone know the formula thanks

    asked by Alex
  79. Macroeconomics

    Cranberry productions in Mass totaled 1.8 million barrels in 2004, 28% increase from previous year's production. This year's crop avg 127.9 barrels per acre, an increase of over 30 barrels per acre from 2003 crop. But demand increased by even more than

    asked by Roberta
  80. english

    in obama's speech ...the market can spin out of control...is this personifiation

    asked by mike