Questions Asked in November 2008

Most Popular Questions of November 2008

  1. Algebra

    How Does a Rodeo Star Get Around

    asked by Anonymous on November 9, 2008
  2. 3rd grade

    juan says, When you put together unequal group, you can only add. is this correct

    asked by cook on November 12, 2008
  3. chemistry

    Which of the following diatomic species are paramagnetic and which are diamagnetic? A blank molecular orbital diagram (Part B 1 figure) has been provided to help you. Drag the formulas to the appropriate magnetic bin :C2^2+,Li2-,B2^2-

    asked by defferan on November 19, 2008
  4. chemistry

    Given that S is the central atom, draw a Lewis structure of OSF4 in which the formal charges of all atoms are zero

    asked by defferan on November 15, 2008
  5. physics

    the sensor in the torso of a crash-test dummy records the magnitude and direction of the net force acting on the dummy. if the dummy is thrown forward with a force of 130.0 N while simultaneously being hit from side with a force of 4500.0 N, what force

    asked by i love polka on November 4, 2008
  6. homework

    In what ways are expository essays similar to business communication? In what ways are they different? What part do facts play in the expository essay? What part does opinion play? Explain your answers in two paragraphs (one discussing similarities and

    asked by Anonymous on November 7, 2008
  7. chemistry

    Arrange the following in order of decreasing stability. A blank molecular orbital diagram (Part A 1 figure) has been provided to help you. Rank the fluorine species from most to least stable. To rank items as equivalent, overlap them. F2, F2+, F2-

    asked by defferan on November 19, 2008
  8. English-Poetry

    can someone help find "The Dying Eagle" by E.J. Pratt for me i need it for my poetry assignment and give me the site address. plz and ty

    asked by Tony on November 3, 2008
  9. statistics

    for a standard normal curve, find the z-score that separates the bottom 30% from the top 70%

    asked by kay on November 5, 2008
  10. Math

    What happens to the man who carries an ax in his teeth?

    asked by Sarah on November 4, 2008
  11. chemistry

    Using your answer from Part A, calculate the volume of a mole of Na atoms (in cm3/mol ). Assume that the entire volume is occupied by Na atoms leaving no gaps or holes between adjacent atoms. (Answer A is V= 2.70*10^7)

    asked by sara on November 10, 2008
  12. algebra

    what do you get when you cross... a thief wity a cement truck? a supermarket with a jungle?

    asked by mcspringer on November 1, 2008
  13. Math - I really need help, please.

    A town has a population of 8400 i 1990. Fifteen years later, it's population grew to 12500. Determine the average annual growth rate of this town's population. I really don't understand this problem. I've been going at it for hours and all I've come to is

    asked by Lacey on November 2, 2008
  14. Chem

    what kind of intermolec forces are in NH4Cl i thought it was london dispersion, dipole dipole, and hydrogen bonding and nottttt ionic. what am i doing wrong?

    asked by Brian on November 24, 2008
  15. 3rd grade

    The question is: If the ones digit of a number greater than 1 is 0, what factor or factors must that number have? a) 2 only b) 5 only c) 2 and 5 d) neither 2 or 5 I thought neither D as it would have to be a number such as 10. 10 + 10 = 20 10 + 10 + 10 =

    asked by Kristina on November 11, 2008
  16. Physics center of gravity

    a uniform bridge span weighs 50000N and is 40m long. An automobile weighing 15000N is parked with its center of gravity located 12m from the right pier. What upward support does the left pier provide?

    asked by Kayla on November 21, 2008
  17. physics

    Three identical thin rods, each of length L and mass m, are welded perpendicular to one another as shown below. The assembly is rotated about an axis that passes through the end of one rod and is parallel to another. Determine the moment of inertia of this

    asked by sara on November 6, 2008
  18. Chemistry

    i tried to do like dis plz chk is it rite or wrong. [2(4(327) + 495 ]- [ 2(4(327) + 523 ] = -28 Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies

    asked by Chem Help on November 13, 2008
  19. math

    What Happens to People Who don't Know Toothpaste From Putty?

    asked by sam on November 22, 2008
  20. Physics

    A child's game consists of a block that attaches to a table with a suction cup, a spring connected to that block, a ball, and a launching ramp. By compressing the spring, the child can launch the ball up the ramp. The spring has a spring constant k, the

    asked by rachel on November 7, 2008
  21. chemistry

    Build the orbital diagram for the ion most likely formed by phosphorus.

    asked by dre on November 10, 2008
  22. Chemistry

    A 522g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system ( c of copper = 0.387

    asked by Ray on November 11, 2008
  23. physics

    From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?

    asked by jason----HELP!!!! on November 22, 2008
  24. Math

    Does anyone know the answer to THIS PIZZAZ WORKSHEET? What happens when joggers get mad?

    asked by misty on November 13, 2008
  25. chemistry

    When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? a. ) KMnO4(aq) b. ) MnO2(s) c. ) MnCl2(aq) d. ) Mn(s)

    asked by Anonymous on November 23, 2008
  26. chemistry

    Write a Lewis structure of OSF4 in which the formal charges of all atoms are zero

    asked by mandy on November 14, 2008
  27. math

    whats the answer to pizzaz workseet 54, Did you hear about riddle?

    asked by misty on November 11, 2008
  28. physics conservation of momentum

    A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x-direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s in the negative

    asked by rachel on November 8, 2008
  29. Physics

    A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×10^4 Pa, while in the region of blockage it is

    asked by Andrea on November 12, 2008
  30. Chem

    Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper

    asked by Vinny on November 7, 2008
  31. college chemistry-thermochemistry

    A 1.50g sample of NH4NO3(s) is added to 35.0g of water in a foam cup and stirred intil it dissolves. The temperature of the solution drops from 22.7 to 19.4 degrees celcius. What is the heat of dissolution of NH4NO3, expressed in kJ/mol NH4NO3?

    asked by maryanne on November 8, 2008
  32. Math

    Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer? 1) 210.10 g+235.100g 2)210.100 g + 235.10 g 3) 210.1 g + 235.1 g 4) 210.10 g+ 235.10 g I think the answer is 2 but I don't

    asked by Joanne on November 6, 2008
  33. chem

    in the ground state electron configuration of Fe3+, how many unpaired electrons are present? I thought it was 1, but im getting a wrong answer.

    asked by natash on November 1, 2008
  34. eco

    Most countries, including the United States, import substantial amounts of goods and services from other countries. Yet there's also saying that a nation can enjoy a high standard of living only if it can produce a large quantity of goods and services

    asked by demi on November 2, 2008
  35. Calculus questions..really need help, please!

    1) Find the value of the lim(x->0) ((sin5x/sin2x)-(sin3x-4x)). I have no idea where to start so if someone could start it off for me it would really help. 2) If f(x) = (2x-3)/(5x+4) then what's the inverse of f(x) So I replaced x with y x = (2y-3)/(5y-3)

    asked by Samantha on November 4, 2008
  36. geo

    What are the worlds biggest settlements?Explain.

    asked by becca on November 12, 2008
  37. Chemistry Please helpppp

    Molecular Orbitals 1.Which of the following diatomic species are paramagnetic and which are diamagnetic? a.C2^2+ b.B2^2- c.Li2^- 2.Arrange the following in order of decreasing stability. a.F2 b.F2^- c.F2+ I know that as you go to higher subshells like from

    asked by Saira on November 20, 2008
  38. History (or for people familar with the film Mulan

    Does anyone know when there are examples of Legalism and Daoism (also known as Taoism) in th emovie Mulan?

    asked by Andre on November 4, 2008
  39. Physics

    Hi guys, Im a bit stumped on how to solve an online physics homework problem and it's really bothering me. I have no idea how to come up with the angles or even attempt the problem and neither do my friends. We'd all really appreciate it if someone could

    asked by Pooja on November 27, 2008
  40. Physics help please**

    A water pipe having a 2.1 cm inside diameter carries water into the basement of a house at a speed of 0.88 m/s and a pressure of 169 kPa. The pipe tapers to 1.0 cm and rises to the second floor 7.1 m above the input point. (a) What is the speed at the

    asked by kelsey on November 24, 2008
  41. 3rd grade

    What is the Plural Possessive of elephant trunk ?

    asked by taylor on November 13, 2008
  42. Chemistry

    What is the effect on the boiling point of a solution (for example, water) produced by a soluble nonvolatile substance (for example, sodium chloride)? What is the effect of an insoluble substance such as sand or charcoal? I believe if an insoluble

    asked by Phil on November 10, 2008
  43. Chem

    A sample of 2-butanol has a specific rotation of 3.25. Determine the % ee and molecular composition of this sample. The sepcific rotation of pure (+)-2-butanol is +13.0. is it (3.25/13.0)x100%= 25%... i'm a little confused on the molecular composition

    asked by Jason on November 18, 2008
  44. CHEM!

    A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1MHz=10^6Hz. Calculate the broadcast wavelength of the radio station 98.30 FM.

    asked by Kara on November 2, 2008
  45. Math

    The area of a 25 inch TV screen is 300 square inches. The area of a 40 inch TV screen is 768 square inches. The area of the smaller screen is what percent of the area of the larger screen? Please and thanks!

    asked by Shania on November 4, 2008
  46. chemistry

    Identify the true statement(s) regarding the entropy of chemical substances. a. All pure substances have a positive entropy at room temperature. b. The dissolution of an ionic salt in water usually leads to an increase in entropy of the system (salt +

    asked by Anonymous on November 23, 2008
  47. Chemistry

    What would be the whole name of 2-butene and hydroiodic acid. Or the diagram. h h Any help would be greatly appreciated.

    asked by George on November 19, 2008

    A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -3.80 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final

    asked by Steven on November 14, 2008
  49. 12th Calculus

    it cost you c dollars each to manufacture and distribute backpacks. if the backpacks sell at x dollars each, the number sold is given by n=(a/x-c)+b(100-x) where a and b are certain positive constanst. what selling price will bring a maximum profit?

    asked by elley on November 18, 2008
  50. physics

    A solid sphere of weight 36.0 N rolls up an incline at an angle of 30.0o. At the bottom of the incline the center of mass of the sphere has a translational speed of 4.90 m s-1. Isphere = 2/5mr^2. What is the kinetic energy of the sphere at the bottom of

    asked by kim on November 13, 2008
  51. chemistry

    In the reaction CaO(s) + SO2(g) ---> CaSO3(s) (Hint: try drawing the Lewis structures of SO2 and SO32-) a. ) Ca2+ acts as a Lewis base, and SO32- acts as a Lewis acid. b. ) SO32- acts as a Lewis base, and SO2 acts as a Lewis acid. c. ) O2- acts as a Lewis

    asked by Anonymous on November 2, 2008
  52. history

    What is the relationship between the ruling class and warrior class in Japan and Europe? I know that in Japan the Samurais were the warrior and ruling class till the Edo period right? but what about Europe?

    asked by christina on November 19, 2008
  53. math

    what happened when two fruit companies merged?

    asked by stace on November 3, 2008
  54. AP Chem

    A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4. It requires 51.7 mL of 0.145 M KMnO4 to titrate 20.0 g of the solution of hydrogen peroxide. What is the mass percentage of H2O2 in the solution? If you

    asked by Anna on November 3, 2008
  55. scientific notation?

    A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to

    asked by 8th grade on November 13, 2008
  56. Chemistry

    When you use a spectrophotometer, should you set the wavelength of light to be the same color as that of the solution, or would a different color be more appropriate? Explain.

    asked by Arnold on November 11, 2008
  57. Chemmmm =(

    Which ion in each of the following pairs would you expect to be more strongly hydrated? (a) Na+ or Mg2+ Why? thanks!!

    asked by Dina on November 30, 2008
  58. english-german

    hello! i need to give a thirty minutes lectore to children(age 11-12).My topic is travelling.What can i do?Do you have any exanples of any games i can make to make it interesting?They can also act and learn some vocabulary but mostly they need to do

    asked by bill on November 15, 2008
  59. Physics

    A passenger bus in Zurich, Switzerland derived its motive power from the energy stored in a large flywheel. The wheel was brought up to speed periodically, when the bus stopped at a station, by an electric motor, which could then be attached to the

    asked by Suzy on November 4, 2008
  60. Chemistry

    I did a lab where I put Copper (II) Chloride in water with Alumnim. 2Al + 3CuCl2 -> 3Cu + 2AlCl3 The aluminum on the reactant side weighs 0.5 g and the CuClw weighs 1.69 grams. It said to find the theoricital yield. Did I do this right? 2Al + 3CuCl2 -> 3Cu

    asked by Lena on November 5, 2008
  61. Chemistry

    What is the geometry of S2O82- its basically two SO4 molecules connected by the O-O bond

    asked by Jason on November 4, 2008
  62. chemistry

    SOMEONE CAN PLZ EXPLAIN IN DETAIL HOW TO SOLVE THIS PROBLEM..THNKS Molar Volume of Sodium If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Question Estimate the volume, V , of a

    asked by unkname on November 9, 2008
  63. Astronomy help!

    The average speed of stars relative to the Sun in the solar neighborhood is about 20 km/s (this is the speed at which we see stars moving toward or away from the Sun - NOT their orbital speed). Suppose you discover a star in a solar neighborhood that is

    asked by anonymous on November 22, 2008
  64. physics

    A mine car, mass= 440 kg rolls at a speed of 0.50 m/s on a horizontal track. A 150-kg chunk of coal has a speed of 0.80 m/s when it leaves the chute. The chunk of coal falls into the car at a 25 degree angle. Determine the velocity of the car/coal system

    asked by Sandhya on November 28, 2008
  65. Physics

    A 2.0Kg otter starts from rest at the top of a muddy incline 85 cm long and slides down to the bottom in .50s. What net force acts on the otter along the incline?

    asked by Morty on November 12, 2008
  66. physics

    Your 300mL cup of coffee is too hot to drink when served at 87C. What is the mass of an ice cube, taken from a -20C freezer, that will cool your coffee to a pleasant 58C?

    asked by Anonymous on November 27, 2008
  67. Ms. Sue! (English)

    I have another question about "Shooting the Elephant" The question is : What does "shooting an elephant" gain from being written years after the events it recounts? Is one possibility that it gave Orwell time to reflect upon his experiences? Are there any

    asked by kayla on November 15, 2008
  68. organic chemistry

    A sample of 2-butanol has a specific rotation of -9.75 degrees. Determine the % ee (enantiomeric excess) and the molecular composition of this sample. The specific rotation of pure (+)-2-butanol is +13.0 degrees.

    asked by Jenn on November 15, 2008
  69. Organic Chemistry

    When benzyl chloride is treated with sodium iodide in acetone, it reacts much faster than 1-chlorobutane, even though both compounds are primary alkyl chlorides

    asked by Brian on November 9, 2008
  70. Physics

    a hand exerts a constant horizontal force on a block that is free to slide on a frictionles surface. the block starts from rest at point A and by the time it has traveled a distance d to point B it is traveling with speed Vb. WHen the block has traveled

    asked by Steve on November 5, 2008
  71. probability and statistics

    a set of 10 cards consists of 5 red cards and 5 black cards. the cards are shuffled thoroughly and i choose one at random, observe its color, and replace it in the set. the cards are thouruoghly reshuffled and i again choose a card at random, observe its

    asked by Derek on November 24, 2008
  72. chemistry

    A voltaic cell at 25oC consists of Mn/Mn2+ and Cd/Cd2+ half-cells with the initial concentrations [Mn2+] = 0.100 M and [Cd2+] = 0.0100 M. Use the Nernst equation to calculate E for this cell. Cd+2(aq) + 2e- = Cd(s) . . . . . . Eo = -0.40 V Mn+2(aq) + 2e- =

    asked by nj on November 30, 2008
  73. japanese :)

    anyone really good at Japanese writing and stuff? :D because i could use some help with some of my exam preparation and sentence structures and stuff :) ( i will add your email address if that's okay) domo arigatou ^^"

    asked by remi on November 8, 2008
  74. science

    the velocity of a particle is given by v=[16t^2i+4t^3j +(5t+2)k]m/s, where t is in seconds. If the particle is at the origin when t=0, determine the magnitude of the particle's acceleration when t=2s. What is the x,y,z coordinate position of the particle

    asked by sarah on November 3, 2008
  75. health

    branches of health education

    asked by nina on November 22, 2008
  76. calculus

    Two runners, A and B run on a straight race track for 0

    asked by Kenneth on November 22, 2008
  77. chemistry

    what experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of the neutral organic compound? Water was added to the organic solvent ,but a drying agent wasn't added. So would the

    asked by jason on November 9, 2008
  78. Algebra

    Here's another problem I'm having a little trouble with: A piece of string is 40 cm long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 cm shorter than the longest piece. Find the

    asked by Celina on November 14, 2008
  79. Physics

    A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 5.40 m/s at the

    asked by Kyle on November 3, 2008
  80. Physics help 2 please **

    A garden hose is attached to a water faucet on one end and a spray nozzle on the other end. The water faucet is turned on, but the nozzle is turned off so that no water flows through the hose. The hose lies horizontally on the ground, and a stream of water

    asked by kelsey on November 24, 2008
  81. AP Chem

    A 3.50 g sample of KCl is dissolved in 10.0 mL of water. The resulting solution is then added to 60.0 mL of a 0.500 M CaCl2(aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution.

    asked by Anna on November 3, 2008
  82. chemistry

    a metal sample weighing 45.0g and at a temperature of 99.1C was place in 38.6g of water in a calorimeter at 25.0C. the calorimeter reached a maximum temperature of 32.8C. 1. calculate the specific heat of the metal. 2. what is the approximate molar mass of

    asked by luke on November 13, 2008
  83. Socials

    Why was Pharaoh so stubborn about setting the captives free? Please and thanks!

    asked by Shelly on November 24, 2008
  84. Chem

    1) A 15.0 g sample of nickel metal is heated to 100.0 C and dropped into 55.0 g of water, initially at 23.0 C. Calculate the final temperature of the nickel and the water, if the specific heat capacity of nickel is 0.444 j / g x C. 2) In a coffee-cup

    asked by Kim on November 11, 2008
  85. Physics

    When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.25 103 J. By how much does the potential energy of a 17.0 kg child increase when the child climbs a normal staircase

    asked by Brandon on November 2, 2008
  86. College History

    During the 1960s the United States had become a more open,more tolerant- in a word, freer country. Defend or refute that statement.

    asked by Teri on November 19, 2008
  87. Chem

    81. Formic acid HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas. HCHO2(l) -> H2O(l) + CO(g) If 3.85 L of carbon monoxide was collected over water at 25 degrees C

    asked by Anna on November 16, 2008
  88. physics

    At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without friction, and decends through a vertical height of 2.40 m, what is her speed at the bottom of the slide?

    asked by lydia on November 24, 2008
  89. AP Chem

    Can someone please check these problems? 34. You fill a balloon with helium gas to a volume of 2.68 L at 23 degrees C and 789 mmHg. Now you release the balloon. What would be the volume of helium if its pressure changes to 632 mmHg but the temperature is

    asked by Anna on November 12, 2008
  90. AP Chem

    Would someone please check these for me? 52. In an experiment, you fill a heavy-walled 5.00-L flask with methane gas, CH4. If the flask contains 7.13 g of methane at 19 degrees C, what is the gas pressure? 2.14 atm 56. A 2.50-L flask was used to collect a

    asked by Anna on November 19, 2008
  91. chem

    The solubility product of Mg(OH)2 is 1.2 x 10^-11. What minimum OH- concentration must be attained (for example, by adding NaOH) to decrease the Mg concentration in a solution of Mg(NO3)2 to less than 1.0 x 10^-10 M (molar)?

    asked by Mischa on November 1, 2008
  92. college systems analysis and design (visio 2007)

    I need help on this data flow diagram pretty much i don't have a clue what i am doing. And my instructor has been no help all year so could somebody please do this for me. i don't have a clue how to use visio either. I have to do a dfd base on the JaD

    asked by lacour on November 23, 2008
  93. Physics

    When a wheel is rotated through an angle of 35 degrees, a point on the circumference travels through an arc length of 2.5 m. When the wheel is rotated through angles of 35 rad and 35 rev, the same point travels through arc lengths of 143 m and 9.0 X 10^2

    asked by Bob on November 19, 2008
  94. math

    the population of a southern city follows the exponential law. If the population doubled in size over an 18 month period and the current population in 10000, what will be the population 2 years from now? the equation for the exponential equation is: A=ao e

    asked by kayla on November 21, 2008
  95. Calculus

    According to the US Census, the world population P, in billions, is approximately P=6.342e^(0.011t); where t is in years since January 1, 2004. At what rate was the world's population increasing on January 1, 2005? Give your answer in millions per year. Is

    asked by George on November 5, 2008

    A motorboat heads due west at 10 m/s. The river has a current that travels south at 6 m/s. a) what is the resultant velocity? b) If the river is 200 m wide, how long doe sit take the boat to cross the river? c) How far downstream is the boat when it

    asked by Kiley on November 4, 2008
  97. Chemistry

    Ammonia (NH3) is formed industrially by reacting nitrogen and hydrogen gases. How many liters of ammonia gas can be formed from 13.7L of hydrogen gas at 93.0 degrees Celsius and a pressure of 2.25atm?

    asked by Chris on November 17, 2008
  98. Algebra word problem help

    The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second. a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed. b.) A city's average walking

    asked by Shawn on November 21, 2008
  99. AP Chem

    A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ion as barium sulfate, BaSO4. How many grams of barium ion are in a 458-mg sample of the barium compound if a solution of the sample

    asked by Anna on November 3, 2008
  100. Physics

    a 300kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.0m above ground. The crane that is doing the lifting produces a steady power of 400 W. How much time does it take to lift the piano?

    asked by Delli on November 25, 2008