Questions Asked on
February 10, 2008

  1. physics

    Suppose the amount of heat removed when 3.0kg of water freezes at 0 degree C were removed from ethyl alcohol and its freezing/melting point of -114 degree C. How many kilograms of ethyl alcohol would freeze? PLEASE GIVE ME SOME HINTS!!!THANKS A LOT!!!!

    asked by Helen
  2. Physics

    8. When a person stands on a rotating merry go round, the frictional force exerted on the person by the merry go round is (A) greater in magnitude than the frictional force exerted on the person by the merry go round (B) opposite in direction to the

    asked by Anonymous
  3. Discrete Math - Vectors

    Can you please help me correct my answers for the following two questions? 1) A tour boat travels 25 km due east and then 15 km S50°E. Represent these displacements in a vector diagram, then calculate the resultant displacement. ====== My Work: I drew the

    asked by Anonymous
  4. physics.

    A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (-15 degree F) to that on a summer day (+ 105 degree F)? I got

    asked by Ruby
  5. Speech

    I can't think of a good topic for an informative speech. I've tried a few different ideas but they were too boring. I want something entertaining so I will be more comfortable about speaking and have fun with it. It needs to be something I can research and

    asked by Aldo
  6. Chemistry

    Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) +

    asked by Alex
  7. ap phyiscs

    A bowler throws a bowling ball of radius R=11 cm down a lane. The ball slides on the lane, with initial speed v(of the center of mass)=7 m/s and initial angular speed =0. The coefficient of kinetic friction between the ball and the lane is .25. The

    asked by kristen
  8. Science

    Suppose you set a glass of water in direct sunlight for 2 h and measure its temperature every 10 min. What type of graph would you use to display your data? What would the dependent variable be? What would the independent variable be?

    asked by Jennifer
  9. physics

    A car is traveling 26 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?

    asked by will
  10. physics

    An electric power line carries a current of 1600 A in a location where the earth's magnetic field is 4.0*10-5 T. The line makes an angle of 75° with respect to the field. Determine the magnitude of the magnetic force on a 130 m length of line.

    asked by rick
  11. statistics

    every year thousands of students take the SAT'S. Recent trends show that the scores on the verbal section follow an approx. normal distribution with mean of 350 and stand. deviation of 110 A)a student is chosen at random. it is noted that only 8% of

    asked by todd
  12. geometry

    Given trapezoid WXYZ, find the ratio of the areas of each pair of triangles: WYX and XYZ WXZ and WXY

    asked by Mary
  13. Chem

    2ClO2 + 2OH- --> ClO2- + H2O Experiment 1, M of [ClO2] = .060 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .0248 Experiment 2, M of [ClO2] = .020 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .00276 Experiment 3, M of [ClO2] = .020 M

    asked by Anonymous
  14. physical science

    You are at the front of a floating canoe near a dock, you jump expecting to land on the dock, instead you land in the water. Explain this in terms of momentum conservation.

    asked by Rachel
  15. english please revise

    The Evolution of Inequality James K. Galbraith, a Government/ Business professor at the University of Texas in Austin, has gathered data and other sources to analyze the evolution of inequality in the world at large. Galbraith in junction with a group of

    asked by christi
  16. Chemistry

    Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) +

    asked by Alex
  17. english

    which is correct? a couple billions of dollar or a couple billion of dollars

    asked by Eric
  18. Harding

    Why was harding's administration so scandal ridden? Consider both Harding's personal qualities and the postwar climate. What was the long-term impact on his reputation, the republican party, and American national interests.

    asked by Amanda
  19. physical Science

    Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30 s, while the second person climbs them in 40s. Which person does more work? Which uses more power?

    asked by Rachel
  20. statistics

    Every year thousands of students take the SAT'S. RECENT TRENDS SHOW THAT THE SCORES ON THE VERBAL SECTION FOLLOW AN APPROX. NORMAL DISTRIBUTION WITH MEAN 550 AND STANDARD DEVIATION OF 110 68.26% OF THE STUDENTS WHO TAKE THE SAT VERBAL SCORE BETWEEN ______

    asked by todd
  21. chemistry

    9.) 250.0g of copper at 100.0 degrees C are placed in a cup containing 325.0g of water at 20.0 degrees C. Assume no less to the surroundings. What is the final temperature of the copper and water? So far I have used q=mc times delta t but I cannot find C

    asked by mhaidar9108
  22. physics

    An airplane flies 200 km due west from city A to city B and then 260 km in the direction of 32.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? ?km (b) Relative to city A, in what direction is city C?

    asked by Shetina
  23. Chemistry

    How do u find the Hvap if you only know the slope is -.002 ?

    asked by James
  24. physics

    There is a 0.225 T magnetic field directed along the +x axis and a field of unknown magnitude along the +y axis. A particle carrying a charge of 7.20 10-5 C experiences a maximum force of 0.455 N when traveling at a speed of 2 104 m/s through the region

    asked by rick
  25. communication styles

    The importance of communication in the field of criminal justice. Benefits of using a particular communication styles. And the importance of the communication process in law enforcement. could you critique this for me. The importance of communication in

    asked by Ree
  26. Algebra

    Solve for x: 5abx = 30ac^2

    asked by Bobby
  27. Math: Vectors

    What conditions must be satisfied by the vectors "u" and "v" for the following to be true? a) |u + v| = |u - v| vector "u" is perpendicular to vector "v" b) |u + v| > |u - v| 0° ≤ θ ≤ 90° c) |u + v| < |u - v| 90° < θ ≤ 180° ------- Can you

    asked by Anonymous
  28. calculus

    1. integral -oo, oo [(2x)/(x^2+1)^2] dx 2. integral 0, pi/2 cot(theta) d(theta) (a) state why the integral is improper or involves improper integral (b) determine whether the integral converges or diverges converges? (c) evaluate the integral if it

    asked by Anonymous
  29. 4th grade math

    A store clerk wants to stack 55 cans of tennis balls in a triangular display. How many cans would be in the bottom row?

    asked by Will
  30. Chemistry

    Difference between hydration and hydrogenation reactions? I have searched everywhere in my book and all I can come up with is: Hydorgenation is when atoms of hydrogen H2 are added to the carbons in a double or triple bond of alkenes or alkynes to form what

    asked by Bethany
  31. physics

    If the price of electrical energy is $0.10 per kilo-watt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degree C? Can anyone please give me some hints to do it? Thanks a lot!

    asked by Charolett
  32. physics

    A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/(Lo) does the length of the beam increase when the temperature changes from that on a cold winter day (-15 F) to that on a summer day (+105 F)? Can anyone please give

    asked by Lina
  33. physics

    if you charge a rubber rod with a piece of fur and bring the rubber rod close to the top of the gold-leaf electroscope, is it induction or polarization?

    asked by todi
  34. chem

    How do u find the Hvap if you only know the slope is -.002 ?

    asked by James
  35. Chemistry

    Can someone tell me if this makes any sense or if I need to start over. I am not sure if it even answers the question. Why is the benzene molecule represented as “a flat cyclohexane with a ring inside?” The benzene molecule is represented as “a flat

    asked by Brad
  36. chem

    The rate data from a chemical reaction shows that doubling the concentration of A with the concentration of B remaining constant causes the rate to increase by a factor of four. What is the reaction order for [A]? a. 0 b. 0.5 c. 1 d. 2 e. 3

    asked by Anonymous
  37. chemistry

    Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. Dispersion forces affect all three molecules. C. H-O-H

    asked by Anonymous
  38. physics

    The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way

    asked by Erin
  39. Chemistry

    For a lab, I had to react toulene with 1% I2 in dichloromethane. Would HI form as a result of this? Logically, I think there would be no reaction because toulene looks too stable. But a colour change occured. Why would this happen?

    asked by Raj
  40. Chem

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

    asked by Anonymous
  41. Spelling

    Hello Can Anyone help me spell the word ( ACK-ROW-NIM ) For Instance DOB Is An ACK ROW NIM For Date Of Birth. THANK YOU in Advance Robert

    asked by Robert
  42. Physics

    Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?

    asked by Jordan
  43. math

    i have 2 math questions i don't understand so if you could help me i would like that. Log base 3 64-log base 3 (8/3)+log base 3 2=log base 3 4r Log base 6 (b^2+2)+logbase6 2=2

    asked by Jz
  44. English

    1. How did the book Tom Sawyer relevant to Mark Twain's real life? 2. How did the boys feel when they were in jackson's island 3. Why did the author put the position of the chapters that way? 4. Descibe all-american boy 5. Descibe the life of boyhood in

    asked by Vanessa
  45. American History

    How did U.S. foreign policy at the turn from the 19th to 20th century affect actions taken by the United States towards China?

    asked by Laura
  46. science

    I did this experiment below with 6% molasses, 12%, and 25% molasses solution and I don't know If I should do a bar or line graph. Yeast Populations Student Materials Yeast is a single-cell fungus that produces carbon dioxide as a byproduct of cellular

    asked by julie
  47. chemistry

    What is the molecular structure around the oxygen in water? What is the molecular structure around all the carbons in ethanol?

    asked by Anonymous
  48. research paper

    My class is writing a paper on China and India and I cant seem to find these topics. although a communist country, how has china opened its boarders to international commerce? Describe the benefits China and India have gained through their presences in the

    asked by Julie
  49. research paper

    i have to include these questions in my report, and i can't seem to find them anywhere, any help? What influences may China and India have on other Asian countries as their economies begin to emerge on the global scene? What benefits have American

    asked by devon
  50. Chemistry

    Below is the question I am trying to answer. I think after much debate, I may have it. Does anyone know if I am close to being right? Does cis and trans isomeric compounds display different properties? Why? Cis means on the same side and trans means on the

    asked by Cynthia
  51. math

    You invest 3400 into account earning simple intrest. The balance is 4624 after 8 years. What is rate of intrest?

    asked by jim
  52. psychology

    If Donna is highly creative? does she focus on one problem at a time or is she a convergent thinker

    asked by trina
  53. simple math

    i just wanted to know how many significant figures in the number 100

    asked by liz
  54. sra mcguin

    In english Hi Boys, This had been a very long trip. First I flew to New York and then waited 6 hours for the next plane. We finally made it to London. It is incredible here. The weather is great and the people are very nice. I saw Aunt Susan and Uncle

    asked by sam
  55. Physics

    On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is it slowing down or speeding up or neither?

    asked by Alex
  56. chemistry

    suppose a new car travels 70.0 miles on one gallon of gasoline with 40% efficient engine. how much fuel is wasted annually due to energy efficiency if in one yr, 478.26 gallons of fuel is burned?

    asked by LISA
  57. chemistry

    Among water, ethanol and isopropanol, Which has the largest molar mass.

    asked by Anonymous
  58. English (Understanding Sentence)

    It's from "Letter from a Birmingham Jail [King, Jr.]" Human progress never rolls in on wheels of inevitability; it comes through the tireless efforts of men willing to be co workers with God, and without this hard work, time itself becomes an ally of the

    asked by mhaidar9108
  59. Trigonometric functions

    1)I have a right triangle. the hypotenuse is 7 the opposite leg is x and an angle is 32. Which equation can be used to find x? A)sin32=x/7 B)cot32=7/x C)tan32=x/7 D)cos32=x/7 I chose D 2)A right triangle 26 is the hypotenuse,opposite leg is 15. Find A to

    asked by Jon
  60. a bit challenging for me

    i got a planning and design lab to do this is the scenario You are give an OR gate which registers 1, when the voltage is +5 volts or greater. Use this gate to determine the frequency of a voltage supply of peak voltage +5V. i don't know what to do..is it

    asked by Physics_freak
  61. dr wls - physics freak design problem

    wls, If you get a chance could you look at the "a !@#$%^&allenging" problem down a little from here. I am not sure my idea is the best.

    asked by Damon
  62. Trigonometric functions

    1)Which angle is coterminal with a -400 degree angle in standard postion? A)40 B)80 C)320 D)400 I chose A (for the next one I don't know what its called but it looks like 0 with a horizontal line through the middle.) 2)Find the exact value of cos looks

    asked by Jon
  63. Math

    How could you change the height of a cone so that its volume would remain the same when its radius was tripled?

    asked by Mike
  64. English

    Write me a sonnet. Make sure it sounds like something an 11th grader would write though. Thanks in advance.

    asked by logan
  65. STATISTICS

    PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS

    asked by todd
  66. English

    What kind of words that end in sion or tion rhyme with expression?

    asked by Meli
  67. Chemistry

    Below is the question I am trying to answer. I think after much debate, I may have it. Does anyone know if I am close to being right? Does cis and trans isomeric compounds display different properties? Why? Cis means on the same side and trans means on the

    asked by Cindy
  68. types of lesson plans

    what are the types of lesson plans???

    asked by klar maesen
  69. statistics

    PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS

    asked by todd
  70. chemistry

    The molecular structure around the oxygen in water is . The molecular structure around all the carbons in ethanol is .

    asked by Anonymous
  71. statistics

    Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is

    asked by todd
  72. calculus

    how would you do this improper integral 1/(x-1) from 0 to 2 this is improper at one, so I split it up into two integrals ln(x-1) from 0-1 and ln(x-1) from 1-2 I then did for the first one the (lim t->1(-) of ln(t-1))-(ln(0-1)) and then the same thing for

    asked by sarah
  73. Chemistry

    Write a balanced equation for the overall reaction: Step 1 O3 + Cl --> O2 + ClO Step 2 ClO + O --> Cl + O2 = O3 + O --> 2O2 Is that correct? or would it be O3 + O --> O2 + O2

    asked by Anonymous
  74. MANAGERIAL ECONOMICS

    EXPLAIN THE ROLE AND RESPONSIBILITY OF MANAGERIAL ECONOMICS.

    asked by RAJAN
  75. Math

    I need some help with this math problem. Multiply 31/6 * 9/11 * 6/17. Writre your answer to simplest form. Answer: 171/187 is this correct? Please help

    asked by Tonya
  76. biology

    what are long threads made of actin called?

    asked by lilly
  77. sra mcguin

    Hi I am to write a postcard to someone in spanish - first I wrote it in english here it is - and we are suppose to use preterite verb forms.

    asked by sam
  78. research paper

    our team has taken your advice on researching on the internet and libraries, yet we are still unable to find: What benefits have American corporations and the American economy gained through economic involvement with China and India? any help would be

    asked by Julie
  79. science

    an observation involving numbers??

    asked by polly
  80. Prealgebra

    Please explain this problem: one fifth of 40

    asked by Jillian
  81. Chemistry

    My question is why is benzene less reactive than 1,3,5-cyclohexatriene? I know that benzene does not undergo addition reactions and is extremely stable to oxidizing reagents. C atoms in benzene are connected by delocalized double bonds which make them

    asked by Megan
  82. biology

    Role of microvilli of cells of kidney tubules? Role of cilia in cells lining trachea?

    asked by Anonymous
  83. Access Database - computers

    I have to make a database to track university apartments in access. I am stuck trying to decide what type of tables and field names i should have. would it make sense to have a table for students including first, last names, address, city, postal code,

    asked by DAVE
  84. chemistry

    In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is

    asked by Anonymous
  85. chemistry

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

    asked by Anonymous
  86. chemistry

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

    asked by Anonymous
  87. economics

    What are example of trade flow, capital and labor flow information and technology flow and financial flows

    asked by linda
  88. chemistry

    im confused with significant numbers how do you do them.. like for example 64 mL

    asked by JOSE
  89. managerial economics

    EXPLAIN 5 FUNCTIONS OF MANAGERIAL ECONOMICS WITH SUITABLE EXAMPLE.

    asked by RAJAN
  90. biology

    what are 3 main types of agranulocytes?

    asked by Anonymous
  91. Chemistry

    My question is why is benzene less reactive than 1,3,5-cyclohexatriene? I know that benzene does not undergo addition reactions and is extremely stable to oxidizing reagents. C atoms in benzene are connected by delocalized double bonds which make them

    asked by Megan
  92. Physics

    For a given lens in a telescope, what are the two letters corresponding to the light that gives the worst and best resolutions, respectively? (E.g., if you think that C gives the worst and A the best resolution, answer CA.) A. Green B. Red C. Yellow D.

    asked by Thomas
  93. history

    What were some of the accomplishments/achievments of the union called the Kinghts of Labour??

    asked by natasha
  94. algebra

    When solving a rational equation, why is it necessary to perform a check?

    asked by becky
  95. spanish sra Mcguin

    can you help me edit this please Hi Muchachos, Esto había sido un viaje muy largo. Primero volé a Nueva York y en seguida esperé 6 horas el plano siguiente. Finalmente lo hicimos a Londres. Es increíble aquí. El tiempo es grande y la gente es muy

    asked by sam
  96. science

    Why are bulls attracted to red?

    asked by Kayla
  97. ecology

    what does an ecologist study?

    asked by joe
  98. Prealgebra

    Please explain this problem: 150% of 54

    asked by Jillian
  99. Prealgebra

    Please explain this problem: 25% of 162

    asked by Jillian
  100. bio

    what are significants of Evolution of Eukaryotes ?

    asked by bio
  101. year7 - ICT

    PLEASE COULD SOMEONE TELL ME WHAT A SCREEN SHOT IS IN ICT THANKS

    asked by vicky
  102. Language and Literature

    I am in 6th grade and need to do an "author page" or "author Biography" but have lost the outline of what is required. I know date of birth date of death city of birth education list of works, but can anyone tell me if there is more? Thank you in advance.

    asked by Daniel
  103. math

    A is the point (1,2), B is (7,4) and C is (5,6). Calculate the length of each side of the triangle ABC.

    asked by Aimee
  104. factoring

    factor these expressions A) x^4+x^2+1 B) x^10+x^5+1

    asked by MTTT*
  105. math

    Laura and Pam decide to meet at the library. They both leave the house on their bikes at 8 a.m. Laura pedals 5phm faster that Pam and waits 12 minutes for her friend who pedals at a rate of 10mph. After spending 2 hours at the library they return home

    asked by Anonymous
  106. English

    please can someone please help me find this information please By which limitations must the press refrain from reporting information?

    asked by Anonymous
  107. English

    please help me find the answer this question What is the Freedom of Information Act? Whom does it benefit and why?

    asked by Anonymous
  108. spanish

    does anyone know the preterite forms of GUSTAR, IMPORTAR, and ENCONTRAR

    asked by ZOEY
  109. Trigonometric functions

    Find the value of Sec A. and I have a right triangle BC=30 and BA=34 A)17/8 B)9/17 C)15/17 D)17/15 I chose D

    asked by Jon
  110. MANAGERIAL ECONOMICS

    SIGNIFICANCE OF MANAGERIAL ECONOMICS?

    asked by RAJAN
  111. health

    can u find me a site with stating specific slang names for depressant drugs? cause i really can not find any :(

    asked by Cynthia
  112. chemistry

    name an isomer of pentane (that is not cyclic)and write down its structure

    asked by luli
  113. Philosophy

    What are the twelve questions in the Myth of Adape

    asked by Pat
  114. science

    what is an observation involving numbers the second and third letters are u and a _ua__ _t_t_ _ _

    asked by polly
  115. Prealgebra

    Please explain this problem: 175% of 200

    asked by Jillian
  116. Chemistry

    How do i solve [A]=[A]0 x e^-kt for k

    asked by Vicki White
  117. English

    How do cameras in the courts arouse controversy about the right of privacy? What about the constitutionality of cameras in the courtroom?

    asked by Anonymous
  118. science

    explain how sound is transmitted through a medium?

    asked by Dj
  119. AP CHEM

    I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL

    asked by Jonathan
  120. Math

    Their is 1000 mL in one L right??

    asked by Dawn