Karl

Popular questions and responses by Karl
  1. Chemistry

    In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate. The problem is that the products ( Cu(NH3)4 and SO4) should be soluble, no? The question is then, what is the percipitate? The ppt is Cu(OH)2. The dark blue

    asked on December 17, 2006
  2. History

    Which of the following tools of the Archaic culture was primarily used for hunting birds and smaller prey? A. atlatls B. game nets C. bird stones D. grinding stones

    asked on September 14, 2015
  3. Science

    In what group of the periodic table is the element with the following configuration [Ar] 4s2 3d10 4p3

    asked on August 25, 2018
  4. physics

    Suppose a rope of mass m hangs between two trees. The ends of the rope are at the same height and they make an angle θ with the trees. (a) What is the tension at the ends of the rope where it is connected to the trees? Express your answer in terms of m,

    asked on October 8, 2013
  5. algrebra 2

    how to find the xintercept and y intercept 5y=15x-90

    asked on September 19, 2010
  6. geometry help

    a trapezoid has base lengths of 4 and 19 feet, with an area of 115 square feet. what is the height of the trapezoid?

    asked on June 1, 2011
  7. determining speed

    car leaves a 20 ft. skid mark how fast was the car traviling

    asked on January 12, 2011
  8. Pre cal

    A parallelogram has sides of lengths 7 and 4, and one angle is 55°. Find the lengths of the diagonals. (Round your answers to two decimal places. Enter your answers as a comma-separated list.)

    asked on November 15, 2015
  9. Chemistry

    Quick question, since FePO4 is insoluble, will that mean a precipitate will form? During the experiment I don't remember seeing a precipitate. Is that my error, or is the precipitate hard to see? Sure. Adding Na3PO4 will make a big difference. FePO4 is

    asked on December 17, 2006
  10. trigonometry

    A barge is being towed south at the rate 2 km/hr. A man on the deck walks from west to east at the rate 4ft/s. Find the magnitude and direction of the man's actual velocity.

    asked on August 7, 2014
  11. physics

    A shuffleboard disk is accelerated to a speed of 5.6 m/s and released. If the coefficient of kinetic friction between the disk and the concrete court is 0.29, how far does the disk go before it comes to a stop? The courts are 15.7 m long.

    asked on September 26, 2012
  12. math

    If a mouse fell to the bottom of a 8 foot deep well and he climbed 3 feet every day but fell 2 feet every night how many days would it be before he got out of the well?

    asked on October 24, 2018
  13. Science

    A ball thrown vertically upward has a speed of 5.0 m/s at a height of 3.0m. The mass of the ball is 1.2 kg. Find its mechanical energy

    asked on March 11, 2016
  14. psychology

    To gain acceptance, a hypothesis must be: suggested by a credible authority. kept secret until the research is completed. imaginative and appealing. backed by empirical evidence

    asked on October 30, 2010
  15. algebrra

    perimeter: 56cm 7cm 24cm the lenght of the third side of the triangle is? idk

    asked on August 31, 2010
  16. Mathematics

    The table shows the number of beads used to make a necklace. Ginger wants to make a smaller necklace using the same ratio of pink to white beads. How many different necklaces could Ginger make? How do you know?

    asked on May 19, 2020
  17. Math

    Gus has a checking account balance of $75. His bank will fund the a debit card purchase that creates a negative balance up to a limit of $200, but charges a $35 fee per transaction for any purchase made in overdraft. Gus made a purchase of $100 yesterday,

    asked on February 10, 2020
  18. Math

    . A school has conducted an exam for the 8th grade and published the results in the table. Find the measure of the central angle that would represent the percent of students who took German in the 8th grade.

    asked on April 5, 2018
  19. jkuat

    find log30 if log2=0.301 and log3=o.477

    asked on October 5, 2016
  20. PHYSIC

    A block displacement causs of a force in a horizontal surface is 13m and the work done by the force on the block .6 joules .

    asked on August 20, 2016
  21. math

    express 84 minutes as a fraction of 4 hours

    asked on July 8, 2016
  22. Social Studies

    How were the carpetbaggers able to influence freed slaves in the south? A. They gave them land and helped them start farms. B. They took advantage of their inability to read and write. C. They promised them high-paying jobs in the newly elected government.

    asked on April 5, 2016
  23. Stats

    I there are 1000 numbers in a contest what is the probability you win if: - play 1 number for $1.00 - play 2 numbers for $1.00 - play 1 number for $2.00

    asked on February 25, 2016
  24. Math

    Sherry saved $1800 she earned at her summer job. She invested part of her money in a Treasury Bill at 5% and the balance in a Money Market fund which guaranteed a return of 10%. If she earned $165 on her investments in the first year, how much was invested

    asked on September 24, 2015
  25. trigonometry

    A box of 200kN is placed on a smooth inclined plane 28° with the horizontal. To prevent the box from sliding down the plane, a rope is tied to it and fastened to a peg on the top of the incline as shown. Determine the pull on the string assuming that the

    asked on August 7, 2014
  26. math

    Hello, i would like to know what is the complex conjugate of : (a*c*d)×( (-e*d+i)/(1-e*c*d^2) ) Thanks for your help.

    asked on November 3, 2013
  27. math

    Hello, i would like to know what is the complex number of : (a*c*d)×(-e*d+i)/(1-e*c*d^2) ACDE are strictly positive real constants. I is an imaginary number. Thanks you a lot for you help.

    asked on November 2, 2013
  28. math

    Hello, I'd like to know how in developing, factoring or simplifying, we can move from: goo.gl/zZdzSs ACDE are strictly positive real constants. I is an imaginary number.

    asked on November 2, 2013
  29. Math

    Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number.

    asked on November 2, 2013
  30. math

    Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number. Thanks a lot for your help.

    asked on November 2, 2013
  31. calculus

    find 3 positive real numbers whose sum is 500 and whose product is as large as possible.

    asked on October 28, 2013
  32. programming

    b. Write a well-commented C++ program that reads data from the input file employee.txt. Each input line consists of last name, first name, base salary, total sales, and number of years of service. Store the output in the file employees_payCheck.txt. Format

    asked on June 1, 2013
  33. Algebra (logs)

    Please help, I need help on these two problems. Solve the equation. log3(x − 16) = log3(9x) e^1 + ln(7) It appears on the homework that the ln(7) is written like this ^ln(7) but I am still stuck on it. Thanks!

    asked on April 22, 2013
  34. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

    asked on November 29, 2012
  35. Physics

    A 100 m long wire with a cross-sectional area of 4 mm2 has a resistance of 6 ohms. What is the resistivity of the material of the wire in Ùm?

    asked on November 29, 2012
  36. maths

    i am a mutiple of 5 ,but not a mulitple of 10.my units and hunderde are the same.the sum of my three digits is 11,what am i

    asked on October 18, 2012
  37. physics

    A box, open at the top, in form of a cube of edge length 40 cm, is constructed from a metal plate. Find the coordinates of the center of mass of the box with respect to x, y, and z coordinate system.

    asked on October 10, 2011
  38. physics

    On the surface of the Moon, a ball is thrown horizontally, with a speed of 15 m/s, from the top of a 6 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground? (On the Moon, the acceleration due to

    asked on September 20, 2011
  39. math

    your class has 8 women and 19 men. write the number of women to men as a ratio and as a quoyient. whatpercent of the class are women? show your work.

    asked on February 9, 2011
  40. math

    ratio of 8/9,quotient of 8/19,percent of 8/19.

    asked on February 9, 2011
  41. Chemistry

    The melting temperature of the fluorides of selected alkali metals and alkaline earths are listed below (see Table). If one considers the trend of the listed melting temperatures in terms of both the ionic character of the bonds and the ionic potentials of

    asked on January 22, 2011
  42. Math

    The rounded numbers all range from the hundred thousands to the millions. Which place-value should be used as intervals for a scale for the graph?

    asked on January 12, 2011
  43. Algebra 2

    M Varies jointly with A and T and inversley with H. Write and equation that represents the relationship.

    asked on December 14, 2010
  44. psychology

    Jeff says, "It seems like the more money people make, the more debt they assume," but a/an __________ study might make the case that a rise in income does not by itself cause an increase in debt. criterion validity case experimental correlational I chose

    asked on October 30, 2010
  45. psychology

    One advantage of using tests in research, rather than laboratory observation, is the usefulness of: the presence of the researchers, which increases the reliability of the results. describing behavior, rather than explaining it. tests in clarifying the

    asked on October 30, 2010
  46. psychology

    It is the proper role of a psychological research scientist to: question data. make safe predictions. keep research methods accessible only to those involved in the research. avoid making predictions.

    asked on October 30, 2010
  47. psychology

    Psychologists are interested in people's behavior and their mental processes. Psychologists believe that: behavior is impacted by environment, but not by a person's physical state. behavior is affected by a person's mental and physical state, but rarely by

    asked on October 28, 2010
  48. social studies

    To use dollar-cost averaging, an investor must invest: in securities with high average yields. in dollars rather than currencies from outside the U.S. or Canada. a variable amount of money at regular intervals. the same amount of money in stocks regularly.

    asked on October 28, 2010
  49. physics

    A motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp inclined 5.0° above the horizontal. What are the magnitude of (a) the net force on the rider and (b) the force on the rider from the motorcycle?

    asked on October 9, 2010
  50. algebraa

    perimeter= 30 5cm 12cm the lenght of the third side of the triangle is?

    asked on August 31, 2010
  51. algebraa

    find the length of the third side of the triangle perimeter=12 3cm 4cm

    asked on August 31, 2010
  52. chemistry

    Using the Le Chatelier's principle, predict the direction of the net reaction in each of the following equilibrium systems, as a result of increasing the pressure at constant temperature. a)N2(g) + O2(g) ==> 2NO(g) PCl3(g) + Cl2(g) COCl2(g)

    asked on June 14, 2010
  53. math

    my P.E. teacher asked the 100 seventh graders in my school if they could swim. Half of the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

    asked on October 7, 2009
  54. A level Mathematics

    Show that the tangents to the curve X=ln((y^2)-6y+11) ,at the points where X=ln6,meet at the point ((ln6)-(4/3),3)

    asked on September 5, 2009
  55. maths

    Show that the tangents to the curve X=ln((y^2)-6y+11) ,at the points where X=ln6,meet at the point ((ln6)-(4/3),3)

    asked on September 5, 2009
  56. gen 300

    Identify a problem in your day-to-day life you would like to solve (e.g., time management). Using the information from your Week Three readings as a guide, prepare a 700 to 1,050-word paper in which you develop a research strategy to find a solution for

    asked on August 24, 2009
  57. Algebra Math 116

    How can you tell if a value is a solution to an inequality.

    asked on August 20, 2009
  58. psychology

    reflect on a challenging experience that you have encountered in either a professional or personal environment that involved significant “thinking through” or reasoning.

    asked on August 8, 2009
  59. psycholgy

    Prepare a 1,050 to 1,400-word paper in which you reflect on a challenging experience that you have encountered in either a professional or personal environment that involved significant “thinking through” or reasoning. Be sure to address the following

    asked on August 8, 2009
  60. language

    My school gives out these pop quizzes and this bonus quiz asks this question: what does polyvinylrododospagaspamomo mean? please help! sincerely, Karl

    asked on February 24, 2009
  61. language

    My school gives out these pop quizzes and this bonus quiz asks this question: what does polyvinylrododospagaspamomo mean? please help! sincerely, Karl

    asked on February 24, 2009
  62. fractions

    I cannot figure out how to turn fraction into decimals.Sample 8 over 25.Also turning decimals into fractions 0.65

    asked on August 26, 2008
  1. helping abused children

    The Stubborn Child Law was in effect until 1973 in Massachusetts and many, many innocent children were ruined by this over the 300 years since the Puritanical types created it. Basically children had absolutely no rights under the law and were property of

    posted on July 26, 2020
  2. Math

    Oh thank you so much, I was confused about the fees

    posted on February 10, 2020
  3. Math

    Is it -97

    posted on February 10, 2020
  4. math

    Thx

    posted on March 21, 2019
  5. Science

    If I look at the exact element it goes under group 5A. Then if I consider the valence electron it will be under group 3A. Im still confused.

    posted on August 26, 2018
  6. college physics

    An aluminum cup contains 225 g of water

    posted on November 18, 2017
  7. Chemistry

    1.44*10^-66

    posted on November 10, 2017
  8. chemistry

    u suc at life

    posted on June 11, 2017
  9. algebra 1

    75

    posted on August 25, 2016
  10. history

    Actually the correct answers are D, B, A

    posted on May 9, 2016
  11. history

    I believe the correct answer is C.

    posted on May 9, 2016
  12. history

    8:D 9:A

    posted on May 9, 2016
  13. try,check,and revise

    I agree with Steve.

    posted on April 12, 2016
  14. Math

    Just do 5 divided by 8 and then do 24 divided by that outcome.

    posted on April 12, 2016
  15. social studies { somebody please help me please

    was the answer to number 3 D(santee cooper project)?

    posted on April 12, 2016
  16. Social Studies

    Sorry for the late response, but your answers are correct.

    posted on April 12, 2016
  17. Stats

    I thought I was looking for a %

    posted on February 25, 2016
  18. chemistry

    438mL

    posted on October 15, 2015
  19. chemistry

    Well, the pressure here is not constant, but the temperature is. Reversible implies that there are infinitesimal changes in certain parameters. For isothermal, reversible systems delta H=0 delta U=0 q=-w and w=-nRTln(Vf/Vi) You can find your Vf by using

    posted on September 28, 2015
  20. Pyhsics

    Coefficient of kinetic friction= tan0- Accelaration/gcos0

    posted on February 17, 2015
  21. Pyhsics

    0.176

    posted on February 17, 2015
  22. At what temperature do hydrogen molecules have the

    At what temperature do hydrogen molecules have the same rms speed as nitrogen molecules at 90 degrees Celsius?

    posted on November 10, 2013
  23. math

    Thanks a lot for your help . I'll visit it

    posted on November 2, 2013
  24. Math

    I made a picture. goo.gl/zZdzSs

    posted on November 2, 2013
  25. chemistry

    there should be an E(V) too. let suppose your E(V)=.128.. your calculation should somewhat look like this if I'm not wrong, Ecell=E^o cell - (RT/nF)lnQ .125=0-(.0592/2)lnQ e^(-.128/.0296)=[I]/.1M [I]=.001324 [Pb]= [I]x(1/2)=.000662 ksp=[Pb][I^2]=1.16E-09

    posted on October 25, 2013
  26. chemistry

    If lithium is a BCC crystal. planar density is atoms per area the 001 plane look like this o--o | | o--o the sides are equal to lattice constant a and the atoms in this area = 4(1/4) = 1

    posted on April 26, 2013
  27. chemistry

    Lithium is a BCC Crystal a = 3.5092 * 10^-8 Planar Density (001) (top plane) = 1/a^2 = 8.12 * 10^14

    posted on April 26, 2013
  28. English-Literature

    house

    posted on July 10, 2012
  29. Math

    okay thanks bobpursley

    posted on January 12, 2011
  30. psychology

    D!! Thank you

    posted on October 30, 2010
  31. psychology

    based on the websit you provided I will assume it is B.

    posted on October 30, 2010
  32. psychology

    Would it be D?

    posted on October 30, 2010
  33. psychology

    I chose D. Am I correct?

    posted on October 30, 2010
  34. psychology

    Please help!!

    posted on October 30, 2010
  35. psychology

    Im confused, please help!

    posted on October 28, 2010
  36. social studies

    I think its D, but not sure, please help!

    posted on October 28, 2010
  37. physics

    a)2.910 b)11.089

    posted on October 25, 2010
  38. physics

    hows that it doesnt work whats the full equation?

    posted on October 9, 2010