Most popular questions and responses by sana
  1. Chemistry

    Consider the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.

    asked on February 16, 2014
  2. Math

    a coin was tossed and a spinner with three equal sections numbered 1 to 3 was spun. what is the experimental probability that the next toss and spin will result in 3 and Tails?

    asked on January 19, 2017
  3. Math

    Brian buys a package of one-inch square tiles. He wants to make a mosaic picture 5 inches long and 4 inches wide. Does he have enough tiles? If so, how many more will be left over?

    asked on March 20, 2017
  4. chem

    ) Which of the following should dissolve the smallest amount of silver sulfide per liter, assuming no complex formation? A) 0.1 M HNO3 B) 0.1 M Na2S C) 0.1 M AgNO3 D) 0.10 M NaNO3 E) pure water

    asked on February 22, 2011
  5. mechanics

    Two skaters, each of mass 70 kg, skate at speeds of 4 m/s in opposite directions along parallel lines 1.5 m apart. As they are about to pass one another they join hands and go into circular paths about their common center of mass. A third skater is skating

    asked on December 6, 2015
  6. mechanics

    A string is wound around a uniform disk of radius R and mass M. The disk is released from rest when the string is vertical and its top end is tied to a fixed bar. (a) Draw a free body diagram indicating all the forces acting on the disk. (b) Calculate the

    asked on December 9, 2010
  7. Maths

    there is a total of 464 students going on the trip.they will be travelling to the trip on a bus and each bus has seats for 45 people. how many buses will be needed for all the students?

    asked on December 11, 2018
  8. English

    Why is it important that canada produce value added products?

    asked on February 11, 2012
  9. mechanics

    Two planets, X and Y , travel counterclockwise in circular orbits about a star, as shown in figure below. The radii of their orbits are in the ratio 3 : 1. At some time, they are aligned as in the figure, making a straight line with the star. During the

    asked on December 9, 2010
  10. English

    Please check this paragraph.please. Wrongdoing and wickedness are as old as first man born in the world. These problems are so great that man cannot cope with it himself. Man can not escape way from wrongful act and the bad conscience without the help of

    asked on October 21, 2010
  11. Biology

    I need help A virus kills its host cell at the end of a. Conjugation b. The formation of a prophage c. Assembly of the capsid d. A lytic cycle

    asked on April 25, 2019
  12. maths

    Suppose there are 10 coins laid out in front of you. All of the coins are fair (i.e. have an equal chance of heads or tails) except one, which flips to heads every time. You draw one coin at random and flip it 5 times. If each of the 5 flips results in

    asked on March 26, 2013
  13. maths

    What is the nth term rule of the linear sequence below? 27,25,23,21,19

    asked on April 26, 2019
  14. statistics

    A researcher finds that two continuous, random variables of interest, X and Y, have a joint probability density function (pdf) given by: f(x,y)={cxy 0

    asked on November 13, 2014
  15. maths

    If the point A(1,-2), B(2,3), C(-3,2), and D(-4,-3) are vertices parallelogram ABCD, then taking AB as the base , find the height of this parallelogram

    asked on March 2, 2013
  16. math

    the game of the euchre uses just 9s,10s,jacks,queens,kings and aces from a standard deck of 52 cards. how many five-card euchre hands have all black cards. is the right answer 495 ways which i got by doing 12C5 x 40C0 = 495 ways

    asked on January 6, 2012
  17. mechanics

    A man begins to climb up a 12-ft ladder . The man has mass 80 kg, while the ladder has mass 10 kg. The wall against which the ladder rests is very smooth, which means that the tangential (vertical) component of force at the contact between ladder and wall

    asked on December 6, 2015
  18. physics

    Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane at a position given by (1.8 1011 m, 3.1 1011 m) with a velocity given by (-8.4 103 m/s, -6.3 103 m/s). What will be the magnitude of the

    asked on March 6, 2012
  19. Maths

    Joe has some pocket money. He spends a fifth of it. He has then £2 left. How much pocket Money did he have?

    asked on October 21, 2014
  20. physics

    two mice are racing to a hunk of cheese.mouse a was between mouse b and the cheese.mouse a started 8.68 meters from mouse b, but "x"meters away from the cheese.both mice traveled at the same velocity,which were 1.43 m/s and started at the same took

    asked on September 25, 2011
  21. physics

    if the distance between two bodies is increased by 25% then % change in the gravitational force is

    asked on March 18, 2016
  22. mechanics

    A wad of sticky clay of massmand velocity vi is fired at a solid cylinder of massM and radius R. The cylinder is initially at rest and is mounted on a fixed horizontal axle that runs through the center of mass. The line of motion of the projectile is

    asked on December 9, 2010
  23. mechanics

    Q2. A block of massmrests on the left edge of a block of larger massM. The coefficient of kinetic friction between the two blocks is , and the surface on which the larger block rests is frictionless. A constant horizontal force of magnitude F is applied

    asked on December 9, 2010
  24. Act sps

    the ratio of the sum to terms p and q terms of an a.p. is psquare:qsquare. prove that the common difference of the a.p. is twice the first term

    asked on August 16, 2017
  25. math (data management)

    How many n-digit decimal sequences (using digits 0-9) are there with k 1s? I'm not entirely sure what you question is asking, but I'll take a guess. You have n digits and k 1's with k

    asked on October 15, 2006
  26. Biology

    write a paragraph describing the importance of dna to science, medicine, and all living organisms

    asked on January 29, 2012
  27. math, algebra

    2a+2ab+2b I need a lot of help in this one. it says find two consecutive positive integers such that the sum of their square is 85. how would i do this one i have no clue i know what are positive integers.but i don't know how to figure this out. Let n be a

    asked on January 26, 2007
  28. math

    what is one-half added to 2 sixths?

    asked on October 21, 2014
  29. mechanics

    Q3. A skeet (a small disc) of massM is fired at an angle  to the horizontal with a speed v0. When it reaches the maximum height it is hit from below by a pellet of mass m (m < M) traveling vertically upward at a speed of v. The pellet is embedded in the

    asked on December 9, 2010
  30. Math

    128,955 round each number to the place of underlined digit

    asked on September 19, 2017
  31. physics

    A partly-full paint can has 0.40 gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 11 m2), how thick is the layer of wet paint? Give your answer in

    asked on February 24, 2014
  32. physics

    1) A car, initially traveling with a uniform velocity, accelerates at a rate of 1.0 m/s2 for a period of 12.0 seconds. If the car traveled 190.0 m during this 12.0 second period, what was the velocity of the car when it started to accelerate?

    asked on February 10, 2013
  33. writing

    My son is 3yrs and 6months old he is facing problem in writting small alphabets would u plz help me ,how i teach him :)

    asked on December 9, 2011
  34. English

    Please correct this paragraph. please.. there is no flow in the second paragraph .plz help It is a very interesting and funny story. The writer of the story Francois Rabelais tells us about the adventure of the two giants, Gargantua and Pantagruel in

    asked on November 4, 2010
  35. english

    i need help picking the right theme A)oppression B)discrimination C)obstacles D)injustice plz asap thankyou

    asked on January 3, 2010
  36. Math

    one-third of lexie's age is 4 years more than one-fifth of this age. lexie's sister is five years younger than her. how old is lexie's sister?

    asked on January 4, 2017
  37. math

    the diameter of scooter wheel is 4cm. how far will the scooter have travelled after 450 revolutions of the wheel?

    asked on January 26, 2016
  38. math

    Differences between the external angle and n-1 sides regular polygon and n+2 side regular polygon is 6 degree then what is the each external angle

    asked on June 15, 2014
  39. physics

    a bowler releases her bowling ball at 425.36 cm/ decelerates towards the pins at -4.8 cm/s^2.the length of a bowling alley is 60ft.what velocity did the ball hit the pins and how long did it take to get there?

    asked on September 25, 2011
  40. physics

    superman flies to a meteor traveling at 440km/hr.superman slows it down at a rate of -24.8m/s^ long before the man of steel stops the meteor?how far did he travel with the meteor?

    asked on September 25, 2011
  41. English

    Dear teachers ... please read this paragraph .i know it if full of error but plz help me. I particularly liked Erasmus view that people should not care if other humans hiss at them as long as they applaud themselves. I love the idea that it is a good to

    asked on October 28, 2010
  42. 10th grade

    i need help understanding the book "we are all welcome here" by Elizabeth Berg. plz help will appreciate the help

    asked on January 1, 2010
  43. Chemistry

    Suppose you mix 20kg of oxygen is used to burn 20kg of wood. Energy is given off as heat and light. If all the ashes and gases are collected , how would the mass compare with that of the orginal substance? Explain your answer. I have no clue what the

    asked on February 18, 2009
  44. math

    Elesia ets 9 bananas 4 apples and 9 mangoes a week.How many mangoes does she eat in 8 weeks

    asked on February 21, 2008
  45. Science

    I don't noe ne thng about fluids. test is in two days If you repost your question and spell the words right, I'll help you. lol pwnT

    asked on January 30, 2007
  46. Accounting

    I find a lot of definitions on the internet, but still confused. What is difference between -carrying value -book value -fair value -fair market value -market value -value in use -net realizable value Are some of these actually the same? Thanks.

    asked on July 20, 2017
  47. Math

    Find the compound interest on rs 64,000 for 1 year at the rate of 10% per anum compounded quarterly. Could you please do it fast I need to give it tomorrow.

    asked on December 10, 2016
  48. physics

    750km towards North West?

    asked on May 20, 2015
  49. Math

    a simple Model (model 1)of distance,d meters,fallen in time t seconds by free-fall skydiver is d(t)=4.9t^2 a. sketch the model b. a different model (model 2) for the distance travelled by a skydiver is d(t)=4.9t^2-0.1t^2.sketch a graph of this function

    asked on March 17, 2015
  50. physics

    explain why carrots look orange?

    asked on January 4, 2015
  51. physics

    explain why carrots look orange

    asked on January 4, 2015
  52. physics

    explain why carrots look orange

    asked on January 4, 2015
  53. physics

    A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for next 1 km. What is the average speed of the car ?

    asked on January 1, 2015
  54. physics

    If the athlete lies down on the ground on his back,his weight is spread over an area of 0.75 meter square. How much pressure does he exert on the ground in this position?

    asked on November 21, 2014
  55. statistics

    You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer

    asked on November 13, 2014
  56. physics

    calculate the friction force of an object? if weight=19600,vi=30ms-1,vf=0ms-1 and S=100m.

    asked on January 7, 2013
  57. math

    what is the sum of 4xdollers and 4x cents?explain your answer in cents

    asked on July 22, 2012
  58. math

    given the digits {1,1,2,5,5,5,6,7} how many even numbers less than 5 000 000 are there?

    asked on January 5, 2012
  59. math

    given the digits {1,1,2,5,5,5,6,7} how many even numbers less than 5 000 000 are there? (and plzzzzz tell me how u got it )

    asked on January 4, 2012
  60. physics

    jeff gordan traveled around a 1.5 mile track 300 times just bcause he felt like took him 6.14 hours to complete the 300 laps.what was his total distance traveled?(1 mile=1.6093km)

    asked on September 25, 2011
  61. physics

    abe left his house at 10:14 and goes north 14.0 kilometers to school then and south 70.6 kilometers to the candy store,arriving at 10:57.what are his displacement,total distance,average velocity?

    asked on September 25, 2011
  62. physics

    a roller coster goes from 43 yards per hour to a stop in the took 4.5 seconds to stop.what was the acceleration? (1yd=0.9144m)

    asked on September 25, 2011
  63. Science

    What is the effect of increasing "dead space" ?

    asked on April 24, 2011
  64. plz correct this line ..eng

    but his purity is not last long as he start growing

    asked on October 21, 2010
  65. Englis

    Dear teachers ,Please read this paragraph and fix the errors.please !!! Shahrazad is main character of the one thousand and one nights. She is a good story teller, a Psychiatrist, and a guru. She is a fearless woman, determined to safe her female gender

    asked on October 17, 2010
  66. MATH

    what is the GCF 16 and 40

    asked on February 24, 2010
  67. english

    can u edit this and add a little more plz like 2-3 lines plz in easy words, it is from the book we are all welcome here by elizabeth berg: Historically the work is significant because it gives us an insight of the horrors of the civil war, which asserted

    asked on January 11, 2010
  68. english

    what is the historical context of the book "we are all welome hear"Which takes place in 1964 ?

    asked on January 11, 2010
  69. english

    i need help findng the perfect theme and moral of the novel "we are all welcome here" by Elizabeth Berg As soon as possible Please Thankyou very much!!!!! :) :) :)

    asked on January 3, 2010
  70. memo

    hey i need to write a memorandum for one of my classes about a company...any ideas on what kinds of topics i could write about?

    asked on October 3, 2008
  71. physics

    a telephone engineer feeds a sound signal into the mouthpiece of a telephone.As part of the tests he is making he incresesthe frequency of the sound.HOW WILL THIS EFFECT TYE ELECTICAL SIGNAL PASSING ALONG THE TELEPHONE WIRE?

    asked on October 25, 2007
  1. Biology

    I think its d but I am not sure

    posted on April 25, 2019
  2. Chemistry

    4) 1 Mm/1nm

    posted on March 1, 2019
  3. english


    posted on January 15, 2019
  4. english

    thanksssss yeeeeeet

    posted on January 15, 2019
  5. english


    posted on January 15, 2019
  6. English

    i agree

    posted on January 14, 2019
  7. Math

    I need the explanation for it

    posted on January 9, 2019
  8. English

    but its December almost February

    posted on December 24, 2018
  9. English

    you did this on my bday

    posted on December 24, 2018
  10. english

    sooo......... which one is right

    posted on December 24, 2018
  11. math

    Selling price=CostPrice+Gain

    posted on February 9, 2018
  12. math


    posted on June 1, 2017
  13. math


    posted on January 14, 2017
  14. Math algebra


    posted on December 17, 2016
  15. probability


    posted on December 17, 2016
  16. Math


    posted on November 1, 2016
  17. Econ

    14.32-3.23 = 11.09 11.09 divided by 3.23 = 3.4 multiply by 100 = 350 %

    posted on November 30, 2015
  18. statistics


    posted on October 13, 2015
  19. life orientation

    It can lead to the pressure of looking cool and u can get addicted to smoking ,drugs etc. Also, you can have a feeling of wearing expensive clothes, accessories to impress which is stressful and not necessary

    posted on February 25, 2015
  20. math

    2x0=0 2x1=2 2x2=2 2x3=6

    posted on August 20, 2014
  21. Biology

    Comparing the pairs of elements listed below, choose the pair in which both atoms have nuclei with the same number of neutrons. 2311Na and 2412Mg 73Li and 94 Be 3216S and 5425Mn 147N and 168O

    posted on February 2, 2014
  22. algebra


    posted on August 6, 2013
  23. business

    here are the right answers B D C A B D C C B C A C D B D D C B A C D B A A B

    posted on June 22, 2013
  24. Management

    These are all correct answer I just passed this exams got 100 marks its guaranteed answers all 100 percent coorect .

    posted on June 18, 2013
  25. Management

    A D A B A C B C A D C B D A B C D C B C D A A C A

    posted on June 18, 2013
  26. physics

    Could u rewrite the eqn that you used for C2

    posted on March 6, 2012
  27. math


    posted on June 17, 2011
  28. Speech Class

    hmmmmm!!!!!i hate studys cause the book makes a child's brain damage

    posted on April 30, 2011
  29. MATH


    posted on February 24, 2010