Posts by hannah

Total # Posts: 3,512

  1. career

    your link just brought up the main google page
  2. career

    Do veterinarians get paid during residency? If so how much?
  3. physics

    A 410-m-wide river has a uniform flow speed of 2.0 m/s through a jungle and toward the east. An explorer wishes to leave a small clearing on the south bank and cross the river in a powerboat that moves at a constant speed of 7.9 m/s with respect to the water. There is a ...
  4. Physics(Please just check, thanks)

    Please diregard. Thank you!
  5. Physics(Please just check, thanks)

    Using a force table the direction and magnitude had to be found for the following measurements: F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees The magnitude and direction found was 280 grams at 257 degrees. Using the magnitude and direction of F1 and F2 I need to ...
  6. Physics(Please help, thank you)

    Oh ok I got 283 and 75 degreed from usng the Rx an Ry equations and then doing tan^-1(Ry/Rx), so 283 and 75 is my answer?
  7. Physics(Please help, thank you)

    Using a force table the direction and magnitude had to be found for the following measurements: F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees The magnitude and direction found was 280 grams at 257 degrees. Using the magnitude and direction of F1 and F2 I need to ...
  8. Chemistry Help? Thanks

    At what temperature do KCL and KNO3 have the same solubility If a saturated solution of KNO3 at 20.0 C is heated to 80.0 how much more could be dissolved? If a saturated solution of KCL at 90.0 C is colled to 30.0 C how much of the solid will precipitate? How much NaCL will ...
  9. math

    the world record for the 100 meter butterfly swim set in 1999 was 51.81 sec. What was the average rate per second? thx:)
  10. ela

    The narrator points out that Emily, who has only recently blossomed, struggled with her appearance in the past. What this means..
  11. Chemistry(Please check)

    an acid with the equilibrium concentration is listed below: 1) HA + H2O = H3O^+ + A- HA= 10^-1 M, H3O=10^-3M, A=10^-3M Calculate the Ka and pKa for the acid. Ka=[10^-3][10^-3] / [10^-1] = 1.00 X 10^-5 pKa = -log[1.00 X 10^-5] = -1.00 Did I do this correctly for the Ka and pKa?
  12. Chemistry(Please check)

    List the conjugate base for the following acids: 1) Acid = CH3CH2CH2NH3^+ Conjugate base = CH3CH2CH2NH2^- 2) Acid = CH3CH2CH2OH2^+ Conjugate base = CH3CH2CH2OH^- Are my answers correct? Thank you!
  13. English

    djssdjssdlawljdwjiqqwewwjliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiid.,m c.makoooowdijfehfjdakwsQ'
  14. Math(Please check, urgent)

    Please disregard. Thank you.
  15. Math(Please check, urgent)

    I was using this equation as an example to try to help myself understand something but I think I may have set it up incorrectly. What I am trying to do is find the y max of a projectile using the equation y = yo + (vo sin Q ) t -1/2gt^2. I keep plugging in my values for the ...
  16. Math(Please check, urgent)

    Yes but I always set it up incorrectly. so [76.95 +/- sqrt (76.95^2 - 4(4.9)(-1.5)] / 9.8 Did I set this up correctly?
  17. Math(Please check, urgent)

    y=1.5 + 76.95t-(1/2)(9.8)t2 = 303.6 I am not sure how to arrive at this answer. I am confused because there is a t and a t^2. Thank you for your help!
  18. physics

    A motorboat accelerates uniformly from a velocity of 6.6 m/s to the west to a velocity of 1.3 m/s to the west. If its acceleration was 2.1 m/s2 to the east, how far did it travel during the acceleration? Answer in units of m.
  19. physics

    A motorboat accelerates uniformly from a velocity of 6.6 m/s to the west to a velocity of 1.3 m/s to the west. If its acceleration was 2.1 m/s2 to the east, how far did it travel during the acceleration? Answer in units of m.
  20. Math(Please answer)

    This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did I do this correctly? sin 30 = 0.50 X 3.021 = 1...
  21. Physics(Please answer, thank you)

    How do you determine the ymax? I know you have to use Q which I have values that were given to me as well as vo values but I am not sure what to do with these values. Physics - drwls, Saturday, September 15, 2012 at 1:29am Define your terms. I have no idea what you are talking...
  22. Physics(Please answer, thank you)

    How do you determine the ymax? I know you have to use Q which I have values that were given to me as well as vo values but I am not sure what to do with these values.
  23. Math

    This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did I do this correctly? sin 30 = 0.50 X 3.021 = 1...
  24. Algebra 2 (Math)

    If A=(0,-17), B=(4,-5), and C=(12, -1), what is the length of the altitude from C to AB
  25. Math (Algebra 2)

    The points (2,1), (4,0), and (-4,k^2) are collinear. What is the value of k?
  26. Physics(Please help)

    How do you determine the ymax? I know you have to use Q which I have values that were given to me as well as vo values but I am not sure what to do with these values.
  27. Math

    Thank you!
  28. Math

    I have to calculate the percent error for my experiment and I just wanted to make sure that I am doing it correctly. My value was 1.376 and the accepted value was 1.371 so I did [1.376 - 1.371] / 1.371 = 0.0036 X 100 = 0.36% Did I do this correctly?
  29. Math(Please check)

    This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did I do this correctly? sin 30 = 0.50 X 3.021 = 1...
  30. Chemistry

    Thank you very much!!
  31. Chemistry

    I have to draw a skeletal, kekule, and lewis structure for this but I am having some difficulty because there is so much going on in the structure. Do you know of any websites that could show me examples of these types of condensed structures?
  32. Chemistry

    In the condensed structure CH3CH2CHCH double bonded to CHCH(CH3)2 ! CH3 What does it mean when the CH3 is in () followed by the 2?
  33. Chemistry(Please check)

    Last question, I just want to make sure I understand the concept of hybridization. For carboxylic acid the hybridization is: CH3= sp3 because there are only single bonds COOH= Sp2 because the oxygen is double bonded to the C Is this correct? Thank you for checking my work!
  34. Chemistry(Please check)

    What is the hybridization of each carbon in the molecule of ethanol. CH3 = sp3 CH2OH = sp3 I think that the carbons are all sp3 because there are only single bonds in this molecule. Is this correct?
  35. Math(Please help)

    Ok so just to make sure I take the square root of 1.005/4.9= 0.45 which would be both positive and negative but I only take the negative correct? Thank you for your help. This makes sense now because I have to compare this value to the actual which was 0.44 so I am not to far ...
  36. Math(Please help)

    The 1.005 was the value given for yo, the angle given was 0 and vo was 3.107. The t I just took from the equation y=yo + (vo sin Q) t -1/2 gt^2. I need to find t using this equation but I wasn't sure how to do it.
  37. Math(Please help)

    Using the equation y=yo + (vo sin Q) t - 1/2gt^2 I have to find t. The values for y, yo and vo were given to me. So I set the equation up like this: 0=1.005 + (3.107 sin 0) t - 1/2(9.8)(t^2 The sin of 0 is 0 times 3.107 is 0. So 0 = 1.005 t - 4.9 t^2 Now I am stuck. I am not ...
  38. Chemistry

    Oh ok I understand thank you!
  39. Chemistry

    Sorry didn't get to finish. CH2 CH2 ! ! CH2 CH2 Each CH2 going from left to right has a single bond as well. I think this is an alkane but I am not sure. I only think this because it only has single bonds of hydrogen and carbon. Is this correct?
  40. Chemistry

    Classify the following: 1) CH2 CH2 ! ! CH2
  41. Chemisty

    Classify the following: 1)CH3CHCH2COOH ! CH3 I think this is a carboxylic acid because of the COOH attached. Would you agree?
  42. chemistry

    ok thank you!
  43. chemistry

    Is that a functional group?
  44. chemistry

    Classify the following: 1) CH3CN There is a triple bond between the C and N. I am really not sure what compound this is.
  45. Chemistry(Please check)

    Thank you very much!!
  46. Chemistry(Please check)

    Classify the following as ether, ketone, ester, amide, etc. 1) CH3CH2CNH2 !! O The !! represents a double bond and it is below the CN I think this is an amide. 2) CH3COCH3 !! O The doube bond is below the CO I think this is an ester. 3) CH3CCH3 !! O The double bond is below ...
  47. Physics(Please help)

    using the equation y=yo + (vo sin Q) t - 1/2gt^2 I have to find t. The values for y, yo and vo were given to me. So I set the equation up like this: 0=1.005 + (3.107 sin 0) t - 1/2(9.8)(t^2 The sin of 0 is 0 times 3.107 is 0. So 0 = 1.005 t - 4.9 t^2 Now I am stuck. I am not ...
  48. Physics(please check)

    Please diregard. Thank you!
  49. Physics(please check)

    X=(Vo cos Q) t X=(3.107 cos 0)(0.443) I just wanted to make sure that I put this equation into my calculator correctly. I have a TI-30 so first I put in 0 then cos to get 1. Then I multiplied by 3.107 to get 3.107 and then multiplied by 0.443 to get 1.376 . Did I do this ...
  50. Math

    Plz help lisa is painting a fence that is 26 feet long and 7 feet tall. A gallon of paint will cover 350 square feet. Write and solve a proportion to determine how many gallons lisa will need.
  51. Math

    An assembly line worker at rob's bicycle factory adds a seat to a bicycle at a rate of 2 seats in 11 minutes. Write a proportion relating the number of seats s to the number of minutes m. At this rate how long will it take to add 16 seats? 19 seats?
  52. Chemistry(Please check)

    Classify the following functional groups: 1)CH3CH = CH2 I think this is an alkene 2) CH3CHCH3 I think it is an alcohol. ! OH Would you agree with my answers?
  53. Organic chemisty(Please check)

    Do you have to show the R? I need to show the kekule structure for CH3CONH2. I know how to start it off Im just not sure about the NH2. The N would be connected to a carbon on the left side correct?
  54. Organic chemisty(Please check)

    Ok thank you so for something like an amine with an NH2 would I show it the same way N with an H above and below??
  55. Organic chemisty(Please check)

    When drawing a kekule structure for CH3CH2OH(alcohol) do I leave the OH at the end just like it is (OH) or would it be shown as O-H? I know that to start of it would be -C- with an H on the top and the bottom as well as the left side and then connected to the C would be ...
  56. Science

    What is the difference between the lithosphere and the asthenosphere? In which layer is each located?
  57. Physics

    Please I need help with this problem
  58. chem

    i am also having trouble iwth this one The atomic masses of barium-137, nitrogen-14, and titanium-48 are 136.905821 amu, 14.003074 amu, and 47.947947 amu, respectively. For each isotope, calculate the nuclear mass, the nuclear binding energy, and the nuclear binding energy per...
  59. chem

    Each beta particle has an energy of 2.51 10-14 J, and 7.5% of the radiation is absorbed by the person. Assuming that the absorbed radiation is spread over the person's entire body, calculate the absorbed dose in rads and in grays i got 3.27e-5 for grays but its wrong
  60. Chemistry

    A watch is to be electroplated with gold. - provide a solution that would make a suitable electrolyte for this cell. I'm not quite sure how to figure out what the electrolyte solution is made of. Any help you can give me would be wonderful!
  61. Chemistry

    A watch is to be electroplated with gold. - provide a solution that would make a suitable electrolyte for this cell. This is the only question I'm having a little trouble with. I'm not quite sure how to figure out what the electrolyte solution is made of. Any help you ...
  62. Science, Chemistry

    What is the volume of 75.65 grams of zinc
  63. chem

    Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy unit must be replaced when its radioactivity falls to 75% of the original sample. If an original sample was purchased in October 2005, when will it be necessary to replace the ...
  64. Chemistry

    The density of alcohol is 0.80 grams per milliliter. What is the specific gravity of alcohol?
  65. Math

    What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
  66. Physics(Please check)

    Please diregard. I found my mistake.
  67. Physics(Please check)

    An experiment was done where a tiny steel ball was measured with a micrometer. I know I already posted a question about this before and was given a respond but after trying to fix my answers I am still lost. If someone could please review my results and tell me where I went ...
  68. Physics(Please check)

    What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
  69. Physics(Please check)

    What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
  70. Physics(Please help, thanks)

    Please disregard. I found my mistake.
  71. Physics(Please help, thanks)

    An experiment was done where a tiny steel ball was measured with a micrometer. I know I already posted a question about this before and was given a respond but after trying to fix my answers I am still lost. If someone could please review my results and tell me where I went ...
  72. Physics(Please help, thank you)

    I had to do an experiment where a tiny steel ball was measured using a micrometer. There was then a series of calculations that needed to be completed and then a percent error had to be calculated. I think that my data may be incorrect or maybe I am just not doing the ...
  73. algr.2

    solve for the equation or formula for the specified variable x+y-a=b,for y over Z
  74. Math(Please help, thank you)

    Yes my data is probably wrong I'm just not sure where I messed up
  75. Math(Please help, thank you)

    Oh ok so now to find the percent error do I subtract 120,000 from 7800 and then multiply by 100?
  76. Math(Please help, thank you)

    I am trying to calculate my percent error for an experiment conducted. I need to compare my average density calculated to the accepted average density but I am having trouble doing this because of the conversions. My average density was 0.12 g/mm^3. The accepted value is for ...
  77. chem

    As the mass of the particle is increased while the speed of the particles remains the same, would you expect the bending to increase, decrease, or stay the same? i thought it would increase because of the weight pulling it. but it was wrong
  78. Physics

    suppose the force exerted by the air on one face of a cube is 8820 N.each side of the cube measure 30 cm. calculate the pressure on this face.?
  79. Chemistry

    i have no idea how to set this problem up! please help! A 22.19-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 50.0 mL. The solid and toluene together weigh 47....
  80. chemistry/math

    nevermind! i converted wrong!
  81. chemistry/math

    The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.0 ft 12.5 ft 7.3 ft? i made ft^3 into Liters and got 8,346,211.799 then I made the grams into kilograms and set up density = mass...
  82. DR BOB PLEASE HELP CHEM

    there are no instructions... i don't see it
  83. DR BOB PLEASE HELP CHEM

    Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?
  84. CHEMISTRY

    thanks :] it is correct. D and C are the answers
  85. CHEMISTRY

    In TLC, why do you spot multiple times? Select one or more correct answers. A. To fill the capillary almost instantly by capillary action. B. So the developing chamber solvent does not evaporate. C. The higher compound concentration facilitates visualization. D. To acheive a ...
  86. Chemistry

    Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?
  87. chemistry

    There is more than one answer for this problem.
  88. chemistry

    In TLC, why do you spot multiple times? Select one or more correct answers. A. To fill the capillary almost instantly by capillary action. B. So the developing chamber solvent does not evaporate. C. The higher compound concentration facilitates visualization. D. To acheive a ...
  89. Chem

    Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?
  90. chem

    oh oops i didn't see the e3
  91. chem

    I am confused so the answer would be .87?
  92. chem

    -879.6?
  93. chem

    do this using the appropriate number of sig figs 320.44 − (3104.1/2.6) i got -880 as my answer and it said to check my sig figs. I thought it was all the numbers up to the ones place
  94. Chem

    Indicate which of the following are exact numbers. the mass of a stapler? i think its inexact because all staplers are different sizes. Is that correct? Also,the mass of a postage stamp. is that inexact? because they can also be diff. sizes?
  95. sig figs

    I am having trouble with my sig figs Many scientific data are reported at 25°C. What is this temperature in kelvins and in degrees Fahrenheit? I got 3.0e2 degrees kelvin since it will have to have two sig figs but it said it was wrong
  96. english-grammar

    I am writing an essay and am not sure If I should combine these two sentences with a semi colon or just leave them separate. Please help! (It may take...will be fruitful) I have found that nothing can be accomplished without hard work. It may take a large amount of persistence...
  97. Chemistry

    Awesome, thank you so much!!
  98. Chemistry

    Suggest a procedure that could be used to remove lead (II) ions from industrial waste water as a precipitate. Provide an equation and explain your choice.
  99. math

    Find the error. Sam is finding 9-6+2. Find his mistake and correct it. Steps: First solve the problem. Second, write a summary statement. Third, find Sam's mistake and explain in complete sentences.
  100. Chemistry

    Describe what hard water is and how a water softening unit works. Provide balanced chemical equations to show how sodium sulphate can remove these ions (Magnesium and Calcium). The first was no problem, but I am having trouble trying to get through the second part balancing ...
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