Questions Asked on
January 28, 2007

  1. chemistry

    Fructose is a sugar commonly found in fruit. A sample of fructose, C6H12O6, weighing 4.50 g is burned in a bomb calorimeter. The heat capacity of the colorimeter is 2.115 E4 J/ºC. The temperature in the calorimeter rises from 23.49ºC to 27.71ºC. A)What

    asked by Chris
  2. Physics

    When a paper cake case falls right way up through air, it quickly reaches terminal velocity. The drag force, D acting on the case is given by D=f§¤Av©÷ where §¤ is the density of air (1.2kg/m©ø), v is the terminal velocity, A is the cross-sectional

    asked by Urvashi
  3. Chemistry

    Magnesium sulfate is often used it first aid hot-packs giving off heat when dissolved in water. When 2.00 g of MgSO4 dissolves in 15.0 mL of water (d= 1.00g/mL) at 25.0ºC, 1.51 kJ of heat is evolved. A) Write the balanced equation for this reaction. I

    asked by Chris
  4. math-independent and dependent events

    A card is chosen at a ramdom from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight? getting a jack 4/52. Then getting an eight 4/52 Probability of getting a jack and then an

    asked by Jocelyn
  5. AP Chemistry

    These are some lab questions from the following lab: Vapor Pressure and Enthalpy of Vaporization of Water 1. Why does vapor pressure change with temperature? 2. The assumption was made that the vapor pressure of water is negligible at a temperature close

    asked by anonymous
  6. Chemistry

    During activation energy... A. A catalyst lowers the activation energy by changing the reaction mechanism. B. A catalyst does not change the activation energy. C. A catalyst lowers the activation energy by changing the rate. D. A catalyst raises the

    asked by Question
  7. Quote

    Who said the quote "it was my heart that counseled me to do it and my heart cannot err" I don't know, and can't find it. However, I can tell you the person who stated it is not very wise: evil is in us all, and we have to think about what we do, not just

    asked by Steve
  8. math

    what is the difference between translation , rotation, relections, and dilation in 8 grade work In 8th grade talk, I recommend you check the examples in your book. OR, if you put your definitions here, I can critique them.

    asked by jose
  9. Chemistry

    Please could you tell me if I am going in the right direction. I am trying to write molecular formula for As2O3 I make molecular mass 197.8 gas density 17.8 to 3 sig figs 2.0 x density of gas at STP / density of hydrogen 17.8/0.0899 = 396 to 3 figs How do

    asked by Lucy
  10. stoichiometry & partial pressure

    1 mole of oxygen gas and 2 moles of ammonia are placed in a container and allowed to react at 850 C according to the equation: 4NH3 + 5O2 --> 4NO + 6H2O Q: if the total pressure in the container is 5.00 atm, what are the partial pressures for the three

    asked by dory
  11. lighthouses

    Hi my son has to do a lighthouse for a school project and it has to really light, I'm not really sure how to go about this project or what materials he will need. Can anyone offer any help Believe it or not here is a site on how to build a model

    asked by Brenda
  12. Chemistry

    During rate of reverse step... A. A catalyst decreases the reverse rate of reaction. B. A catalyst does not change the reverse rate of reaction. C. A catalyst increases the reverse rate of reaction. A catalyst hastens the time for equilibrium to be

    asked by Question
  13. chemistry

    how do you determine wich metal is the best conductor of heat? by its sepacific heat, or mass or what? specific heat can be used. Best conductor? You have to take a rod, heat one end, and record how the temperature along the rod increases. Or you can look

    asked by claudia
  14. Permutations

    I am having trouble with this maths problem: There are 8 people at a round table - 6 guests, 2 hosts. How many possible arrangements are there if the 2 hosts aren't allowed to sit next to each other. Thanks hint: sit the two host first, then let the guest

    asked by Kevin
  15. math, correction

    bobpursley. i'm still questioning the problem states find the slope of any line perpendicualr to the line through points (3,3) and (2,8). y= (8-3)/(2-3) the slope i get is. (5)/(-1) for the first slope now to get any line perpendicular to the line through

    asked by Jasmine20
  16. math,correction

    I have to determine which two equations represent parallel lines. equations are (a) y=(-4)x+2 (b) y=(4)x+2 (c) y= (1/2)x +2 (d) y=(-4)x+3 so the answer would be: A and D yes

    asked by Jasmine20
  17. math,help

    can someone set this up for me as an equation so i can solve it. thanks A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path. see the frame

    asked by Jasmine20
  18. math,help

    can someone please just set the equation for me to solve this problem . thanks A solar collector is 2.5m long by 2.0m wide. It is held in place by a frame of uniform width around its outside edge. If the exposed collector area is 2.5m^2, what is the width

    asked by Jasmine20
  19. science

    tell me about science apparatus They are used in science. You need a much more specific question to get a useful answer. For instance: What is the Hoffman apparatus, and how is it used?

    asked by rick
  20. maths

    Show that the equation (1) divided by (x+1) - (x)divided by (x-2)=0 has no real roots Well, to begin, start with 1/(x+1-x). The x's cancel out because they are opposite signs, so now you have 1/1, or just 1. Then, you are dividing 1 by (x-2). In order for

    asked by rochelle
  21. English (Speech)

    I have to write a manuscript on an article. How do I do this. I looked online, and I found this " Each manuscript should contain a separate cover sheet with the manuscript title, the authors’ names, their degrees, affiliations and complete mailing

    asked by Andrew
  22. Geneticist

    What is a geneticists annual salary ? Where do they perform most of their work ? How much education does it require to become a geneticist ? What materials do you work with ? Do geneticists work in a group or alone and why ? If they work in a group how

    asked by Sam Williamson
  23. Manuscript on an Article (bobpursley)

    Posted by bobpursley on Saturday, January 27, 2007 at 8:56pm in response to English (Speech). Read the article. What did it say? What was it point of view? Was the author complete in the analysis? What needs to be done? How did it make you feel? So in the

    asked by Andrew
  24. why is noone answering my question?!?!

    A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical asymptotes x=3, x=-3. I understand that to set it up, it is y= ax+b / (x+3)(x-3). I don't understand how to solve for a and b. Put

    asked by luke
  25. Chemistry (please help)

    How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. I think she wants to know starting from 100mM of X how you would get the X values through a serial dilution. X 0 1 3 1 10 30 100

    asked by tatiana
  26. science

    what are some items on earth that look similar to the moon?

    asked by Roxy

    PLEASE FINISH HELPING ME.. I asked experts to answer you. I am not a person who is a expert on writing format. The issue of cover sheet, etc has to be clarified by the teacher. Generally, teachers specify a style guide and format issues. There is no right

    asked by Andrew
  28. Statistics

    A mathematics education researcher is studying where in high school mathematics texts it is most effective to insert questions. She wants to know whether it is better to present questions as motivation before the text passage, or after the passage. The

    asked by AJ
  29. Physics

    Newton showed that the motion of comets is controlled by gravitational attraction of gravity. Many comets move in elliptical orbit but if they are moving very fast they will perform a hyperbolic orbit. A student attempts to model the hyperbolic trajectory

    asked by Ishani
  30. grammar

    I need help with correctly punctuating this sentence. I am not sure where the period goes. Should it be inside or outside the parenthesis in this sentence? The textbook had recently been revised. (The last revision took place in 1992). Thank you This site

    asked by Patti
  31. math

    3x^2+17x+10 *you have to factor completley 51xcubed+12 Didn't I do this already? I remember it. What two factors of ten (hint: 5,2) will add to 17 when one factor is multiplied by 3? Hint: the five will be multiplied by three.

    asked by margie
  32. Poetry

    What does "To be great is to be misunderstood" by Emerson mean exactly? I think he meant something along the lines of this: In 1920 in London, at a conference of the world's greatest physicists...someone remarked to Einstein that only three men understood

    asked by Tabby
  33. math2

    5y^8-125 *you have to factor completley easy. Take out the five: 5(y^8-25) Now, isnt y8 the same as y4 )2 ? That is a square, so you have that y4 squared minus another perfect square? That factor as the difference of two squares. After doing that, you may

    asked by margie

    I know people are volunteering freely but I really need help! Have patience. Some of us have girl scouts and we have to be at the booths to sell cookies. Go buy some cookies while you wait. Girl Scout cookie sale is over in three weeks, don't let is slip

    asked by margie
  35. math word problem gr 6

    Two mothers and two daughters divided $21 in dollar bills evenly among themselves. Each received an equal number of dollar bills. How could this be? One momma is a grandmother. That makes three folks. Grandmother, daughter, and granddaughter. each one will

    asked by tyler


    asked by margie
  37. Math

    I need help simplifying radicals. The problem in priticular is the square root of 60x^2 √60x^2 can be simplified this way: √(4 * 15 * x^2) Can you see what to take out from under the square root sign? √4 = 2 and √x^2 = x Therefore, we end up with

    asked by Taylor
  38. Chemistry

    What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? (assume constant temprature and pressure) Balanced equation- N2 + 3H2= 2NH3 After finding this answer, what volum of ammonia is produced in this reaction? 1.

    asked by Kylen
  39. Math

    Factor Completely: I am really confused on how to start it. 12q^5w^2-36q^4w^3-120q^3w^4 Help please. :) Factor out 12q^3w^2: 12q^3w^2(q^2 - 3qw - 10w^2) Can we factor further? Yes. q^2 - 3qw - 10w^2 factors are (q - 5w)(q + 2w). We end up with this:

    asked by Teresa
  40. History

    What was the first boat to cross the Panama Canal emerald

    asked by Anonymous
  41. molecular formula

    a gas contains 51.7% sulfur & 51.6 percent oxygen. in a sample of gas, there is .620 g. v= 292 ml. p=806 torr. t= 378 K. what is the molecular formula. how does the % sufur & oxygen tie into all this? 51.7% S and 51.6% O gives me more than 100.0%. OOps.

    asked by dory
  42. Science

    What forces act on a ball rolling down a slope?

    asked by Wandi
  43. khan

    examples of sentence structures

    asked by zainab
  44. chemistry (work shown)

    How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. Volume variables (x) mL 0 1 3 1 10 30 100 We starting out with 100mM of X which would be considered its concentration. In order

    asked by tatiana
  45. science

    how does temperture affect the viscosity of a liquid?? In Nearly all liquids, increasing temperature makes the flow faster. Viscosity is resistance to flow, so viscosity goes lower.

    asked by Ashley
  46. Grammar

    I have to identify the words in the brackets. Could you correct my mistakes: (Amy) (was) very (happy) (on) (Sunday). (Amy's birthday) was on Sunday, (and) (no) one (could) (make) her sad. Amy ate (so) (much) bithday cake that she (couldn't) eat pizza.

    asked by Gina
  47. world religons

    Can someone help me I am looking for a Christmas carol that mentions the golden,silver,bronze and iron age? I have been looking and can't find anything that mentions it. I think I found it.

    asked by teri
  48. Manuscript Speech

    How do I write a Manuscript speech on an article? What should it look like? Any examples? Check this site for a lot of information about writing a manuscript speech. Thank you for using the Jiskha

    asked by Andrew
  49. chemistry

    Equation- Mg + 2HCl -> MgCl2 + H2 What volume of hydrogen at STP is produced from the reaction of 50.0 g of Mg and the equivalent of 75g of HCl? To get the volume of hydrogen, you need to know how many MOLES of hydrogen are produced. To know this, you need

    asked by student
  50. science

    I have to write a purpose and an objective in my lab report and I do not know the differences between them. If anyone could help me that would be great. Thanks.

    asked by ally
  51. English

    hi for my english project i have to draw a map of the war my character was in..My book was the things they carried so it was the vietnam war, i was wondering if you had any pictures of were the vietnam war was fought. The directions also say i need

    asked by Jojo
  52. Help

    dissonance : resonace :: harh : rich music : polyphony polyphony : instrument cacophony : telepragh I presume you mean "harsh" not harh. So, to do an analogy, you really need to understand the meanings of all the words involved. Do you know what dissonance

    asked by Chels
  53. Chemistry

    Hi. I need some help with this. When you stretch a balloon against your lips, is heat given off or absorbed? Which driving force is dominating this change, the tendency toward lower energy or the tendency toward disorder? Heat is given off obviously but I

    asked by Lisa

    How successful was organized labor in improving the position of workers in the period from 1875-1900? they were very unsuccessful. They attempted plenty of times but with all the problems with the unsupportive governtment they didn't get far. How

    asked by Lisa
  55. Math

    What does the contextual meaning of each for slope mean?

    asked by Haley
  56. science

    can anyone detail the simiarities and differences between the terrestrial biome and the aquatic life zone? both are subject to stratification, there are different layers and these layers inhabited by different organisms. for example: canopy in the forest,

    asked by kg
  57. Chemistry

    During reaction mechanism... A. catalyst does not change the reaction mechanism. B. catalyst changes the reaction mechanism. C. catalyst always makes a reaction mechanim more complicated. Catalysts lower the activation energy and provide alternative

    asked by Question
  58. religion (please help)

    explain what the cultural and societal influences that have made hinduism vital to the region in which it originated. Please tell us what you've learned. We'll be glad to critique your answer and respond to your ideas. ms.sue you should give this student

    asked by kg
  59. math

    Q. The sum of the measures of two supplementary angels is 180 degrees. If one angel measures 45 degrees less than twice the measures of its supplement, find the measure of each angle? what steps do I need to take in order to get the measurments? A1 + A2 =

    asked by catalina
  60. chemistry (please check/help)

    How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. Volume variables (x) mL 0 1 3 1 10 30 100 We starting out with 100mM of X which would be considered its concentration. In order

    asked by tatiana
  61. Chemistry

    In my problem i need to find the mass of Ag in AgNO3. I have 3.489g of AgNO3. Help please! Determine the percentage composition from the formula. PercentAg= atomicmassAg/molmassAgNO3 Then, mass Ag= 3.489 * decimal percent above.

    asked by Jason
  62. math

    If 10 human couples move into a new unpopulated area, how many people will live in the area after 200 years? The couples are 20 years old when they move. The people's life expectancy is 60 yeras, the average family has 4 children, and the average couple

    asked by Stephanie
  63. history

    Can someone please tell me some important dates in the US in the 1800s? Please and thank you.

    asked by Fidelia
  64. please read my eassay

    This is my other part of the essay. Likewise, articles for F.O.X. news are found extremely biased. The article titled “Defense Secretary Warns Congress Against …” written by Trish Turner, Mike Emanuel and Nick Simeone seemed to support Bush more.

    asked by Anonymous
  65. science project

    I'm filling out forms for my freshmen science fair project and I'm not sure what they mean by this question: Data Analysis: Describe the procedures you will use to analyze the data that answer research question or hypothesis HELP! Depends on the data. Most

    asked by Carol Ann
  66. help me improve my sentence

    It is interesting to see how these three Internet sources all cover the same story, but with different methods and techniques to persuade the reader to believe the media’s perspective of things. how can i say this in a different way. It is interesting to

    asked by david
  67. science

    how do different liquids affect egg shells? Sounds like a worthy science project. Why don't you try some liquids and find out? Some might dissolve or soften them, some will change their color. wwell it depends on what type of liquid your useing like soda

    asked by omar
  68. paradox

    which of the following is not a paradox? a. It was "darkness visible."- Milton b. If you love someone, let her go. c. The more things change, the more they stay the same. d. Pretty is as pretty does. I would say d but I am not 100% sure... I'd say d also.

    asked by Anonymous
  69. AP English 3

    I need help constructing a concluding sentence for my paragraphs. 1. Allusion (The fault dear Brutus is not in our stars but in ourselves) 2. Definition (we are the defenders of freedom wherever it continues to exist in the world, but we cannot defend

    asked by Kitty
  70. Grammar

    Could you please correct my mistakes. You've described a warm friend who's cooling off. You've- subject described- verb a- adjective warm- adjective friend- direct object who's- who: direct object/ is: verb cooling- verb off- preposition Corrected: You -

    asked by Gina
  71. English

    How does walt whitman change the way people experience poetry? He got rid of the meter, so it cant be sung. It is freestyle, conversational. Read Leaves of Grass

    asked by Larry
  72. Red Scare

    What are some examples on how McCarthy abused his power during the REd SCare?

    asked by Kitty
  73. math,algebra

    or I would think: -5/4 you think so??? I have complety forgotton how to turn a decimal into a fraction. i have to turn : -1.25 into a fraction -1 1/4 maybe??? thats what i thought at first but i like to confirm it yes i think that's it..awsome thanks no

    asked by Sammy
  74. grammar

    looking for simple subects. we spent most the day picking berries in the woods. There is only one word in that sentence that is the subject. All the other words make up the predicate. Who is doing the action in the sentence? That's the subject. =)

    asked by Anonymous
  75. Predication

    I have searched the internet and my books for a clear explanation of a predication. Does anyone have some advice?

    asked by Grammer
  76. physics, physics, physics!!!!!

    At a depth of 10.9 km, the Challlenger deep in the Marianas Trench of the Pacific Ocean is the deepest site in any ocean. In 1960, Donald Walsh and Jacques Piccard reached the challenger deep in the bathy scaph trieste. Assuming that sea water has a

    asked by james