Questions Asked on
January 24, 2008

  1. physics

    a metal spoon is placed in one of two indentical cups of hot coffee. Which cup will be cooler after a few minutes?

    asked by rosie
  2. chemistry

    How much heat would be released by the condensation of 5.40 g of steam at 100 °C and the subsequent cooling of the water to 25 °C? [ÄHvap = 40.7 kJ/mol at 100 °C; Cp for H2O(l) is 4.18 J g-1 °C-1]

    asked by jason
  3. Chemistry

    Hey, can you help me balance this equation? Cu2S + HNO3 --> Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!

    asked by Matt
  4. biology

    how are glucose and ATP the same and how are they would be awesome

    asked by Trey
  5. Calculus

    The function V=4pir^2 describes the volume of a right circular cylinder of heigh 4ft and radius r feet. Find the (instantaneous) rate of change of the volume with respect to the radius when r=6. Leave the answer in terms of pi.

    asked by Anonymous
  6. Physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?

    asked by rick
  7. geometry

    what is the formula for the area of a regular polygon?

    asked by JdS
  8. calc

    Find m and b so that y=mx+b is a solution to the differential equation dy/dx=1/2x+y-1

    asked by Mischa
  9. Geometry

    is triangle XYZ with vertices X(-3,1), Y(2.4), Z(2.-5) a scalene triangle?

    asked by Swassy
  10. Math

    Equal groups riddle. I am a number between 20 and 30. When you put me into 6 equal groups, there is an even number in each group and 1 is left over.

    asked by Pam
  11. poem

    We had to write a poem about some sort of abstract object or idea. Can you tell me how my poem sounds and if you could figure out what I'm talking about? "With me you can go on new adventures An undiscovered portal to the imagination. I do this in your

    asked by Emily
  12. math

    evaluate the exponential expression. write your answer as a fraction in simplest form. 1) ( 5 to the power of 3) to the power of -1 2)12 to the power of -2

    asked by SYNESTER
  13. AP CHEM

    2-propanol has a delta Hvp of 701 J/g and a vapor pressure of 31.6 mmHg at 20.0 degrees C. Estimate the normal boiling point of this alcohol in degrees C. i used the clasius-clayperon equation and this is what i have so far. ln (31.6 mmHg/760 mmHg)= (-701

    asked by John

    at 25 degrees C liquid A has a vapor pressure of 100.0 torr, while liquid B has a vapor pressure of 200.0 torr. The heat of vaporization of liquid A is 32.0 kJ/mol and that of liquid b is 18.0 kJ/mol. At what celsius temperature will A and B have the same

    asked by John
  15. math

    when is partial factoring used?

    asked by Lena
  16. Calculus

    Find the value or values of c that satisfy (f(b)-f(a))/(b-a) =f'(c)for the function f(x)=x^2+3x+3 on the interval [-2,1]. I can't seem to get -1/2, the answer given. [((1)^2+3(1)+3)-((-2)^2+3(-2)+3)]/[1+2] =2

    asked by Anonymous
  17. science

    During reproduction, the sex cells containing the chromosomes M1 and Fl combine to form a fertilized egg..a. Whichalleles are on each of the chromosomes?

    asked by katie sandly
  18. English

    What is the action verb and linking verb in this sentence: The day was warm and sunny.

    asked by Paige
  19. critical thinking

    How can a person distinguish between the prejudicial and nonprejudicial use of rhetorical devices?

    asked by neka
  20. algebra 1b

    Solve each system using substitution. check your solution. a = 2/3b -3 a = 2b - 18 c = 3d -27 4d + 10c = 120

    asked by dillon
  21. chemistry

    Can you help me write and balance this equation. I also have to include the physical states. Question: When manganese(Mn)is put into dissolved hydrochloric acid(HCl)it produces solid manganese(III)chloride (MnCl3) plus hydrogen. Thanks :)

    asked by Miley
  22. Calculus

    I need to find the derivative of the following problem via logarithmic differentiation, but I'm getting stuck. I know how to solve via logarithmic differentiation, but I can't figure out how to re-write the exponent(s) as logs. Could someone help me? y=

    asked by Jessie
  23. mental

    I have a question about the psychological syndrome called gaslighting. Have there been any recent case studies of actual "gaslighting" as it's seen in the 1944 film Gaslight where psychologist have proof of one individual purposely trying to drive another

    asked by Shannon
  24. Algebra 1

    I am not good at these kinds of problems, so if anyone could show me how to do this, it would be great. Currently, there are about 270 million people in the U.S. The EPA set a goal of 35% of solid waste recylced by the year 2009. The estimate is that by

    asked by Tibby


    asked by VICTORIA
  26. science

    1) In a syringe, what happens to the air paricles when you push the plunger? 2) In a syring, what happens the the air particles in the bubble from the bubble wrap when you pull up the plunger? 3) Are there more air particles in the bubble when it is

    asked by Tracy
  27. math

    i am wondering if the following answer to my math problem is correct f(x)=x^3-4x-2 [2,3] We are doing limits and are suppose to use the Intermediate value thereom the answer i put was f(2)0

    asked by rudy
  28. biology

    How would gene splicing, cloning, or stem cells help a patient with sickle cell anemia?

    asked by peter
  29. 4th grade Algebra

    How to solve this problem. 3X-Y=12

    asked by Serena
  30. spanish

    what are the parts of a spanish name like where does the fathers last name go in their childs name

    asked by renee
  31. Stats

    Suppose the correlation between SAT Verbal scores and Math scores is 0.57 and that these scores are normally distributed. If a student's Verbal score places her at the 90th percentile, at what percentile would you predict her Math score to be?

    asked by Danielle
  32. spelling

    glue is to sticks as thorns is to? Must begin with scr spr str thr!!

    asked by rose
  33. geography

    Is there a certain rhyme out there to help study state capitals?

    asked by BB
  34. science

    Does asexual reproduction use meiosis or mitosis?why?

    asked by nikki
  35. Life Science

    When would an organism need to undergo the process of mitosis? Meiosis?

    asked by Bretagne
  36. earht science

    as the rocks in earhts surface pend amd push on the land above them, what is formed?

    asked by mandy please help me
  37. math

    x^3-4x-2 [2,3] we have to use the intermediate value thereom. not sure how to do this.

    asked by sonya
  38. geometry

    is triangle RST with verticies R(-1,5), S(-4,1), T(2,1) a isosceles?

    asked by Swassy
  39. geometry

    is triangle DEF with verticies D(-3,-4), E(2.-5), F(0,1) a right triangle?

    asked by Swassy
  40. Linguistics

    Hi I am looking for examples of voiceless/voiced words for the following places and manner of articulation: bilabial / nasal; alveolar/lateral; velar/stop plosive; velar/nasal; alveolar/stop plosive; post-alveolar/gliding; dental/friction;

    asked by Robert
  41. geometry

    what is the simplest form of 2 over 18?

    asked by Rebecca
  42. geometry

    rs/st=5/7 find the indicated value of x ._______________._______. R 2x+9 S 4x-15 T

    asked by babygirl
  43. math

    how can u tell if a shape is whole? like does it have straight sides?

    asked by anonymous
  44. music

    I need help studying for my term. I need to know how to identify stuff on a staff or musical notation. Like clefs, notes, signatures, etc... How should I remember these? Are there any online resources? I also need to define terms. How do I remember these

    asked by william
  45. chemistry

    Choose the groups of molecules below in which all the molecules have a net dipole moment. a. SiHCl3, O2, H2O b. HF, H2ClCH2, H2O c. HF, CH3Cl, H2O d. CCl4, HCl, NH3 e. HF, H2O, N2

    asked by janet
  46. Social Studues=) help me plz

    What are longhouses made out of?

    asked by Usher
  47. spelling

    fifteen is to five as nine is to ? must start with one of the following :scr,spr,str, snd thr

    asked by shawna
  48. Chemistry

    What would increase the pressure inside a tank of helium gas?

    asked by Monique
  49. spelling

    broom is to sweep as brush is to ? answer must star with scr, spr, str or thr

    asked by shawna
  50. physical science

    How far can a person run in 15 minutes if they run at an average speed of 16km/hr?

    asked by Ashleigh
  51. social studies/science

    who is Garter Brayton and what did he do.

    asked by skiler allen
  52. math

    the 4X4 square represents 1/4 of a whole shape. create three possible whole shapes. justify how u know that each new shape is one whole.

    asked by anna
  53. studying

    wut should i study for a social studies unit test in the 8th grade????

    asked by sammy
  54. World History

    1. Identify three peace efforts of the late 1880s and early 1900s. 2. Describe how each of the following served to inflame tensions in Europe:(a) nationalism, (b) imperial rivalries (c) militarism. 3. (A) Why did European nations form alliances? (B) How

    asked by Roderick
  55. sci

    what are the challenges of managing reducing solid waste terrestrial resource issue?

    asked by chris
  56. statistics

    For a particular sample of 50 scores on a psychology exam, the following results were obtained. Mean = 78 Midrange = 72 Third quartile = 94 Mode = 84 Median = 80 Standard deviation = 11 Range = 52 First quartile=68 What score was earned by more students

    asked by Jennifer
  57. statistics

    Answer the following: What does it mean to say that x = 152 has a standard score of +1.5? What does it mean to say that a particular value of x has a z-score of -2.1? In general, what is the standard score a measure of?

    asked by Laly
  58. social studies

    what are thomas jefferson's beliefs?

    asked by R J Stevenson
  59. Psychology

    What do the results of twin studies on IQ say about John Locke's tabula rasa theory? I have to write an essay based on this question. Can someone help me with info on twin studies and IQ like between monozygotic and dizygotic? I also need help figuring out

    asked by Christian
  60. Social Studies

    I hope i can be helped with this question and i would be really grateful. I have being given an essay and the question goes like this. "How can helping others make one great". I would like at least three examples. Thank you.

    asked by e.v.a
  61. Math

    how would i solve this? 2x+2y=12 would i solve for x or y? Im stuck!!

    asked by Kayla
  62. Biology

    1. In females the first meiotic cell division produces____cells. 2. One of the cells is ___ than the other and is called ______. 3. The polar body stays attached to the ____. 4. The larger cell is called the _____ and it mature into _____. 5. The second

    asked by Sue
  63. English

    I have been given an essay on should students be allowed to dissect frogs in their biology class. I have taken a positive stand but i don't know where i can get get help from. Can u pls help me?

    asked by e.v.a
  64. math

    is anyone on-line.

    asked by Sue
  65. math

    if 6 counters are 3/4,then what is one?

    asked by apple
  66. math

    if o o o is 1/5,then what is one?

    asked by apple
  67. social studies

    What part of the ndian Subcontinent does the Indus River Valley lie on?

    asked by Jillian
  68. social studies

    What is Brahma?

    asked by Jillian
  69. Chemistry

    The density of iron at 25 C is 7.871 g/cm^3 what is the volume of one mole of solid iron at 25 C? i understand that volume = m/d but how would i go about solving this?

    asked by Matt
  70. math

    i am having trouble iwth the following math problem: lim x->oo -x/squre root 4+xsquare I am not sure if i multiple the denominator with the numerator?

    asked by rudy
  71. Pre AP Physical Science

    If a person's average speed for a 10.00 kilometer race is 5.644 meters per second, what was her winning time?

    asked by Ash
  72. math

    i am wondering if the following answer to my math problem is correct f(x)=x^3-4x-2 [2,3] the answer i put was f(200

    asked by rudy
  73. English

    What definable elements make a poem categorized as Victorian Poetry?

    asked by Camron
  74. algebra

    1. 18 m/min = cm/s 2. 5.7 gal/h = c/min 3. 264 yd/s=? mi/h Anyone know the answers to these?

    asked by kt
  75. math

    how do i get the answer with this problem 64 division bracket(16 divison 2.4)subtraction 16 bracket the answer should be 4 but how do i get that number

    asked by monnie
  76. science

    a 45kg skater pushes off from a wall with a force of 234 n. what is the sklater's acceleration?

    asked by elizabeth
  77. algebra

    If Olivia drove x km at 60 km/h and then twice as far at 80 km/h. In terms of x, how many hours did the trip take? Give the answer in simplest terms

    asked by kit
  78. Chemistry

    I need to write and balance this equation: Sodium sulfate produces sodium oxide plus gaseous sulfur trioxide when heated. Thanks

    asked by Manny
  79. science equations

    what is the acceleration of a 8.4 kg mass if a force of 64.8 n is used to move it toward earth?f=mxa

    asked by summer
  80. math

    rewrite the expression with positive exponents.pleaze explain thanks 1)20X TO THE -8 POWER Y TO THE -8 POWER

    asked by SYNESTER
  81. AP CHEM

    what type of cubic structure is iron?

    asked by Matt
  82. science equations

    what force is necessary to acceleration a 32 kg dog at a rate of 23.6m/s2? f=mxa

    asked by summer
  83. chemistry

    Assume you are in a lab with a test tube of sulfuric acid. You drop a piece of calcium into the tube. What do you observe happening in the tube? thank you

    asked by roma
  84. science equations

    a boy standing n a high cliff dives into the ocean below and strikes the water after 2.5 s. what is the boy's velocity when he hits the water? deltav=gxt

    asked by summer
  85. chem

    In the lab, you're handed a test tube with sodium chloride dissolved in water. You add aqueous barium carbonate to the tube. What are your observations? Thanks

    asked by lena
  86. History

    Investigative reporters are bolder today than they were 30 or 40 years ago. How do you think the impact of Watergate has contributed to this boldness? Do you think investigative reporters are justified in being bold to get information for the public, or do

    asked by Anonymous
  87. science

    A person's body is thronw outward as a car rounds a curve on the highway is this newton's 1st 2nd or 3rd law

    asked by summer


    asked by JAKE!
  89. Business

    In a world without trade, what would American consumers have to pay for logitech's products?

    asked by Lauren
  90. Algebra

    I am supposed to subtract and simplify if possible. This is backward to what we had in our homework so I am confused. two fractions 4-z/z-3 minus 7z-6/3-z I need to determine what z is?

    asked by Marysvoice
  91. Life Science

    Why is the process of mitosis and meiosis both important to a living organism.What would happen if meiosis did not occur?

    asked by Bretagne
  92. physical science

    compute the density in g/cm of a piece of metal that has a mass of 0.520kg and a volume of 75cm

    asked by arpa
  93. Calculus

    An isosceles triangle, whose base is the interval from (0,0) to (c,0), has its vertex on the graph of f(x)=12-x^2. For what value of c does the triangle have maximum area?

    asked by Anonymous
  94. Stats

    Fortunately, plane crashes are rare events. Suppose that commercial crashes occur on an average (mean) of 1.1 per year (Hint: Poisson). a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there

    asked by MoJo
  95. gov

    Why does the constitution require those who serve as president to be at least 35 years old; those serving as senate be 30 years old; and those serving in the house of representatives to be at least 25?

    asked by 565
  96. Biology for Carol/Roderick

    It would be helpful if you could use the same name consistently, please. Otherwise we think we are answering the same post over and over.

    asked by SraJMcGin
  97. Calculus

    Find the average value over the given interval. y=3x^5; [-3,3] I can't seem to get the answer, 0. 1/(3+3) [integral -3 to 3 (3x^5)dx] and I get 273/2

    asked by Anonymous
  98. Question

    Who is the american president? What adjectives can be used to describe him/her?

    asked by joey
  99. advanced fuctions

    Determine the intersection point of the curves y=log(x-2) and y=1-log(x+1). Both of them are base 10

    asked by Samir
  100. World History 10th grade

    Identify three peace efforts of the late 1800s and rarly 1900s. (1)hoped for a permant end to the scourge of war. (2)a world court to settle dispute betwwen nations. (3)the struggle for women suffrage . tell me is this is right.

    asked by Sue
  101. Math

    Solve the system by addition 2x-4y=7,4x+2y-1 can show one show me how to do this.

    asked by T.T
  102. MPG's- fuel economy

    Which production car can you buy today that has the highest gas mileage?

    asked by Mike
  103. Math

    show that graphs of x-2x/x+2y=1/3 and x-y/x+y=3/5 do you solve it?

    asked by Wenny
  104. chem

    100 mL of LiNO3, 0.241 M is mixed with 240 mL of 0.618 M Ca(NO3)2. What is the final concentration of NO3- in the solution?

    asked by duff
  105. Holocaust

    We would like to know about some info on the m=wonderful, Anne frank, So if anyone has some information on this, please write back. Thanks

    asked by Angelo & Brooke
  106. math

    Adult tickets for a play cost $13 and child tickets cost $10. If there were 22 people at a performance and the theater collected $277 from ticket sales, how many adults and how many children attended the play?

    asked by amy
  107. math

    Adult tickets for a play cost $15 and child tickets cost $6. If there were 33 people at a performance and the theater collected $360 from ticket sales, how many children attended the play? 14 children 15 children 16 children 18 children

    asked by kavon
  108. world history

    Why did European nations form alliances?

    asked by Sue
  109. physics

    How does air within winter clothing keep you warm on cold winter days?

    asked by rosie
  110. math

    Solve the system by substitution.x-5y=2 ,2x+3y=17

    asked by gavin
  111. science

    I need a couple of example for a compound beside cookies and soap.

    asked by Vern
  112. math

    The sum of two numbers is 76. The second is 8 more than 3 times the first. What are the two numbers?

    asked by pat
  113. math please help

    The length of a rectangle is 8 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the width of the it 1. 2 in. 2. 3 in. 3. 4 in. 4. 5 in.

    asked by Kara
  114. Algebra

    I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor

    asked by Carl
  115. Statistics

    Here is my question: The size of dust particles was measured in a factory. Pictures of particles were taken with a camera attached to a microscope with 50x magnification. 9 imahes of particles were taken giving the following pixel areas of the interior

    asked by Megs
  116. science

    How does sickle cell anemia occur--what type of mmutation is it--is it a substitution, deletion, or insertion mutation--or is it all three? Also, How would gene splicing, cloning, or stem cells help a patient with sickle cell---would any of these be any

    asked by peter
  117. Electricity

    A motor running at its rated power provides 2.6 lb-ft torque at its rated speed of 2020 rpm. The motor draws 5.6-A from a 230-V supply at a phase angle of 37 degrees. Determine the following: The horsepower delivered by the motor, The efficiency of the

    asked by Nick
  118. Algerbra 1B

    Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

    asked by dillon
  119. world hisroty

    Identify three peace efforts of the late 1800s and early 1900s. (1)The Hague Tribunal (2) Women Enternational League For Peace and Freedom (3) Nobel Peace Prize tell me if I'm on the right track.

    asked by Sue
  120. gov

    Didn't our founding fathers mean( " the right to bear arns") to only allow only countries to have guns for the protection of the people?

    asked by 565
  121. music

    how is to triple eight notes played as

    asked by sammy
  122. Math

    The difference of two numbers(the second minus the first) is 48. The second is 8 less than 5 times the first. What are the two numbers?

    asked by Kara
  123. Algerbra 1B

    Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

    asked by dillon
  124. science equations

    my grand daughter is having a awful time with this and i can't help her but if you would explain it to me maybe i can help here goes a skier with a mass of 48kg moves with a velocity of 11.45 m/s east. what is the skier's momentum p=mxv.

    asked by summer

    The unit cells for most alkali metal halides are face-entered for both the cations and anions. In the case of NaCl the sodium ion is just a little too large for the chloride ions to touch each other along the face diagonal. The unit cell edge length is

    asked by Jake
  126. ap chem

    could you please check my work? what is the volume of one mole of solid iron at 25 degrees c? 1 mol Fe/.141 mol/cm^3 = 7.10 cm^3 (the .141 came from converting the density in to moles) is that correct? then the next step in the problem is to find the

    asked by John