Most popular questions and responses by lo
  1. math

    A road perpendicular to a highway leads to a farmhouse located 8 mile away.An automobile travels past the farmhouse at a speed of 80 mph. How fast is the distance between the automobile and the farmhouse increasing when the automobile is 7 miles past the

    asked on October 13, 2007
  2. Chemistry

    1.Calculate the density of oxygen, O2, under each of the following conditions: STP 1.00 atm and 20.0 ∘C 2.To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.3-L bulb, then filled it with the gas at

    asked on November 7, 2014
  3. chemistry

    Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SeCl2 and SiO2.

    asked on December 5, 2014
  4. physics - charge

    A 80.0 g block carrying a charge Q = 33.0 µC is connected to a spring for which k = 74.0 N/m. The block lies on a frictionless, horizontal surface and is immersed in a uniform electric field of magnitude E = 4.84 104 N/C directed away from the spring and

    asked on July 10, 2010
  5. chemistry

    The enthalpy of combustion of carbon to carbon dioxide is -394 kJ according to the equation: C (s) + O2 (g) --> CO2 (g) How many kJ of heat are released when 24.0 g of carbon are burned in an excess of oxygen

    asked on June 11, 2011
  6. algebra

    A salesperson has January sales of $20,000 (1, $20,000) and April sales of $80,000 (4, $80,000). What is the rate of change?

    asked on June 9, 2013
  7. physics

    A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?

    asked on January 9, 2015
  8. science

    A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?

    asked on January 9, 2015
  9. algebra

    mike wants to make meatloaf and the recipe calls for six pounds of meat if he uses a 3 to 1 ratio of beef to pork how much pork will he use

    asked on July 14, 2011
  10. chemistry

    Which of the following sets of quantum numbers are not allowed. For each incorrect set, state why it is incorrect. For each correct set, name the atomic orbital. i. n=4, l=3, ml =2, ms =-1/2 ii. n=2, l=1, ml =-1, ms =-1 iii. n=5, l=-4, ml =2, ms =+1/2 can

    asked on June 26, 2016
  11. math

    A spinner is divided into 5 equal sections numbered 1, 2, 3, 4, and 5. If the spinner is spun and a coin is tossed, what is the probability of getting a tail on the coin and an odd number on the spinner

    asked on April 27, 2011
  12. Chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550 mL of a solution that has a concentration of Na+ ions of 0.600 M ?

    asked on October 14, 2015
  13. statistics

    A student government representative at a local university claims that 60% of all the undergraduate students favor a move to Division I in college football. A simple random sample of 250 undergraduate students is selected. What is the probability that the

    asked on February 21, 2015
  14. math

    Two planes depart from the same airport at the same time. One hour later one of the planes is 480 miles due north of the airport and the other plane is 550 miles due east of the airport. At that time, what is the distance between the two planes?

    asked on March 1, 2011
  15. math

    A six-sided die with sides numbered 1 through 6 is tossed twice. What is the probability of getting a number larger than 4 on both throws

    asked on April 25, 2011
  16. algebra

    . A professor has RM 15000 to invest for one year, some are 8% and the rest are at 7% annual interest. If she will earn RM 1100 from these investments, how much did she invest at each rate?

    asked on June 15, 2014
  17. Physical Science

    A weight lifter cleans and jerks 150kg, lifting it 2m above the ground in 1.5s. What is his power output?

    asked on October 18, 2010
  18. Physical Science

    If you do 600J of work hoisting a 20kg bale of hay, to what height did you lift

    asked on October 18, 2010
  19. Algebra 2

    The volumes of two spheres differ by 336pi cubic meters and the lengths of their radii differ by 6 meters. Find the length of the radius of the smaller sphere. (Round your answer to the nearest hundredth)

    asked on March 5, 2014
  20. english

    I need help writting a discussion on why the follow paragraph is effective including variety and rhythum of the author's writing:Individuals can be denied credit for a number of reasons. Individuals who are near limits on existing cards, have too much

    asked on September 16, 2011
  21. physics

    A small turbo-prop commuter airplane, starting from rest on a Tallahassee airport runway, accelerates for 21.0 s before taking off. Its speed at takeoff is 56.0 m/s (125 mi/hr). Calculate the acceleration of the plane, assuming it remains constant. Express

    asked on January 9, 2011
  22. 8th grade math

    A group of 1,500 high school students were asked to fill out a questionnaire about their future career choices. The circle graph represents the results of the questionnaire. Use the circle graph to answer the question. Doctor: 20% How many students chose

    asked on May 9, 2011
  23. math

    State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the

    asked on April 25, 2011
  24. physics - capacitors

    Capacitors C1 = 5.0 µF and C2 = 2.0 µF are charged as a parallel combination across a 150 V battery. The capacitors are disconnected from the battery and from each other. They are then connected positive plate to negative plate and negative plate to

    asked on July 10, 2010
  25. math

    A triangle has sides of lengths 48 feet, 55 feet, and 74 feet. Which statement is true concerning this triangle?

    asked on March 2, 2011
  26. MTH 157

    A box contains 3 blue cards numbered 1 through 3, and 4 green cards numbered 1 through 4. List the sample space of picking a blue card followed be a green card.

    asked on January 18, 2011
  27. Physics

    This problem compares some energy properties of two motor vehicles: For efficient car, use drag coefficient of .21 and a cross sectional area of 1.5m^2. For a light truck, use drag coefficient of .75 and a cross sectional area of 2.7m^2. Use 1.25 kg/m^3

    asked on November 8, 2011
  28. math

    State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the

    asked on April 27, 2011
  29. chemistry

    The volume of an ideal gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75atm and 27oC

    asked on December 6, 2010
  30. physics

    A student in the laboratory connects a 13 Ω resistor, a 24 Ω resistor, and a 41 Ω resistor in parallel and then connects the arrangement to a 43 V dc source. What is the current? What is the power? (in watts)

    asked on January 12, 2015
  31. Math

    A consumer buys n light bulbs, each of which has a lifetime that has a mean of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes,

    asked on April 27, 2011
  32. chemistry

    Arrange the following groups of atoms in order of their increasing atomic radius: K,Rb,F,B,Be I think its F

    asked on July 1, 2016
  33. Math

    A sofa regularly sells for $510. The sale price is $423.30. Find the percent decrease of the sale price from the regular price.

    asked on October 13, 2013
  34. CHEM LAB

    Why must you weigh the beaker containing salt and water before dissolving the salt? Why would it be incorrect/inaccurate to obtain the total mass after dissolving the salt? Explain your answer. (We had to do to create different nacl salt concentration )

    asked on June 15, 2016
  35. Critical Thinking

    Is the following passage valid/sound/strong arguments and what is the reasoning? If you want to see the best version of the three muskateers, try the 1948 version. Lana Turner is luscious, Vincent Price is dastardly; Angela Lansbury is exquisitely regal;

    asked on March 29, 2010
  36. physics - trans. line

    A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1040 A. The line is at a potential of 680 kV at the power station and carries the current to a city located 159 km from the station. (a) What is the power loss due to

    asked on July 20, 2010
  37. phi208 Ethics and moral reasoning

    What are some relativistic beliefs that you have or that you find in society? What are those ethical beliefs and how do people justify those beliefs? Using the articles from Mary Midgley and James Rachels, present a critique of those relativistic beliefs.

    asked on February 28, 2014
  38. chemistry

    The amount of energy required to remove an electron from the surface of Hg is 7.22x10^-19 J. What is the threshold frequency of mercury? I got 1.09*10^15 hz is it right?

    asked on June 21, 2016
  39. math

    Below is the rule for calculating the velocity of a falling object. Use this rule to calculate the rate, expressed in feet per second, that a piano, dropped 3 seconds ago, is falling. V(t) = 32t A. 192 feet per second B. 288 feet per second C. 96 feet per

    asked on October 10, 2012
  40. science

    The following replicate values were reported for the concentration of magnesium chloride, MgCl2, in mol/L. What value should be reported as the mean concentration of the chloride ion, Cl, converted to ppm? (You may use the simplified definition of

    asked on October 5, 2016
  41. 8th grade math

    A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green? A x 8/225 B x 4/91 C x 12/445 D x 1/225

    asked on April 28, 2011
  42. mat

    Marcus flips a coin and tosses a six-sided die with the sides numbered 1 through 6. What is the probability that he gets a head on the coin and a number divisible by 3 on the die

    asked on April 27, 2011
  43. math

    A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?

    asked on April 25, 2011
  44. math

    State whether the events described are independent or dependent and determine the probability: A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red

    asked on April 25, 2011
  45. Statistics

    How do you make a tree diagram for this? (and in general) 1) of the voters in a certain city, 40% are republicans and 60% are democrats. among the republicans, 70% are in favor of a particular bond issue whereas 80% of the democrats favor the issue. if a

    asked on November 9, 2010
  46. chemistry

    Write the balanced chemical equation for the dissolution of magnesium sulphate

    asked on July 4, 2016
  47. MTH 157

    The 99 employees in a factoryearn a salary of $35,000 per year, while the CEO makes $266,000 annually. What are the mean, median salaries for all 100 people? Is the mean or median the more appropriate measure of "center" in this case? Explain.

    asked on January 18, 2011
  48. science

    what would happen if a large amt of light colored dust was added to the atmosphere? dark black soot from fire?

    asked on March 29, 2011
  49. math

    solve. x(1 +2x) = (2x - 1)(x - 2)

    asked on January 24, 2010
  50. Physica

    what is the pressure dut to 30 m heght water column

    asked on August 3, 2012
  51. mirror images

    Can someone please explain what mirror images to me in simple terms.

    asked on October 15, 2011
  52. pie graph // math

    Jorge and his family went to an amusement park over spring break. They spent $500.00. The pie graph shows how the $500.00 was divided over the trip. Use the pie graph to answer the question. Hotel : 2/5 How much money did Jorge and his family spend on a

    asked on May 9, 2011
  53. math

    A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times

    asked on April 27, 2011
  54. math

    A right triangle has a hypotenuse equal to 25 m and one leg equal to 17 m. What is the approximate value of the second leg of the triangle?

    asked on March 2, 2011
  55. psychology

    Summarize the multi-factorial model and how it relates to the diagnosis of illnesses. • Select two health problems discussed in the text. • Explain what role psychology has played in understanding and managing these two health problems.

    asked on July 10, 2010
  56. science

    production. Describe at least two alternatives to oil that are currently available and discuss the barriers that keep these alternatives from replacing oil as our primary means of energy? Additionally, utilizing at least two scholarly or reputable

    asked on February 5, 2014
  57. Physica

    What is the value of the focal length fn2 of a convergent lens with index of refraction ( n2 =1.5) if it was fn1 =5cm for an index of refraction n1 = 1.4 .

    asked on August 1, 2012
  58. trig

    right triangle has an acute angle of 24.8 and an adjacent length of 145 what is the side opposite of the acute angle

    asked on February 14, 2012
  59. math

    Express y=[4x-x^3]/[3x^2+2)^2 as a product and then differentiate. Simplify your answer using positive exponents. Help Please! ty

    asked on March 5, 2011
  60. CRT 205

    is the following argument valid, sound or stong and what is the reason/rationale: Too many seniors, disabled veterans, and families with children are paying far too much of their incomes for housing. Proposition 168 will help clear the way for affordable

    asked on March 30, 2010
  61. chemistry

    How many degenerate orbitals have the following name? 2s 3p 5d 4p 5s I don't get this question

    asked on June 26, 2016
  62. math

    A box full of packets of biscuits each weighing 200 g weighs 12 1/2 kg.The empty box weighs 2 kg 500 g. calculate the number of packets of biscuits in the box.

    asked on September 20, 2015
  63. phil208

    Active and Passive Euthanasia by: James Rachels

    asked on March 6, 2014
  64. Business math

    To help consumers in this tough economic climate, Pikes Peak Harley-Davidson offered to finance a new motorcycle for qualifying customers at 13% down, 7.50% interest for 48 months during July 2009. Rich Martinez was interested in calculating what his

    asked on November 18, 2012
  65. chem

    what is not a function of specific rotation temperature concentration wavelength

    asked on November 3, 2011
  66. calc

    Can someone please show me how to find the integral of sin squared x?

    asked on February 27, 2011
  67. CHEM 11

    I am really stuck with this... what mass of oxygen is contained in 10.5 umol of chromium(III)nitrate hexahydrate? Can't understand how to convert the micro-moles especially!

    asked on February 22, 2011
  68. algebra

    factor by grouping x^3-5x^2+5x-25

    asked on April 12, 2010
  69. english

    chaucer sounds like a modern day buisnessman. explain why

    asked on October 18, 2009
  70. chemistry

    Difference between a halogen and a halide? Explain using chemical formulas.

    asked on July 5, 2016
  71. chemistry

    This statement is writing in my textbook can someone please explain to me what it mean: Determining the position of electrons, eliminates their wave properties.

    asked on June 26, 2016
  72. math

    Teena's favorite jeans were marked down from $30 to $25. What was the percent discount on the jeans?

    asked on January 11, 2011
  73. phil208

    Glaucon states that most people think that justice (Points : 1) Is only praised by good people. Is the lesser of two evils. Is the rule of the majority. Is the rule of the powerful.

    asked on March 6, 2014
  74. math

    dividing moniomials. 2 to the 2nd/2to the -3

    asked on March 8, 2009
  1. life orientation

    Answers for task 3

    posted on July 28, 2019
  2. phi208 Ethics and moral reasoning

    hi how are you

    posted on September 7, 2018
  3. Algebra


    posted on November 29, 2017


    posted on November 28, 2017
  5. Math


    posted on June 30, 2017
  6. Math


    posted on March 6, 2017
  7. MHS


    posted on November 30, 2016
  8. chemistry

    a. 66

    posted on October 17, 2016
  9. Chemistry

    Kb=1.86 Kf=.52

    posted on August 21, 2016
  10. Civics


    posted on July 31, 2016
  11. chemistry

    yes thank you and that's what I mean for iii typo error

    posted on June 26, 2016
  12. Physics

    no you're not gonna fail with a 0% as your final you will get exactly 60 % calculation: (67.90)+(0.10)=60%

    posted on June 14, 2016
  13. Calculus


    posted on March 25, 2016
  14. Riddle


    posted on January 21, 2016
  15. Riddle

    ;' ]

    posted on January 21, 2016
  16. physics


    posted on September 18, 2015
  17. Grammar Please Help!!

    .)The Grand Canyon is one of the natural wonders of the world. Since 1908, it has been a U.S. national monument

    posted on April 20, 2015
  18. Physics-Linear momentum


    posted on January 23, 2014
  19. College Algebra


    posted on October 9, 2013
  20. mathematics

    1/3+2/3=1. You simply add the numbers on the top of the fraction. 1+5/3= 2and2/3 Since 3/3 = 1, 5/3 = 1+2/3 So 1+1+2/3=2and2/3

    posted on October 25, 2012
  21. math 115 wk.7

    its 9 kid. read your book. this is basic math.

    posted on February 1, 2012
  22. physics : HELP PLEASE

    first part the answer is 30 m. d= rt so distance = rate (3) times the time (10) so the distance is 30

    posted on November 8, 2011
  23. math


    posted on April 29, 2011
  24. science

    yea i really don't know so some1 plz answer! :( i hate homework

    posted on March 29, 2011
  25. Chemistry


    posted on February 24, 2011
  26. Statistics

    can someone check this answer i got. i got 37/250. two branches are republican and democrat. from republican two branches are favor and dislike. probability of being republican 40/100 and probability of favoring issue is 70/100 and disliking is 30/100 from

    posted on November 9, 2010