Popular questions and responses by Aly
  1. physics

    The physics of electric potential energy at one corner of a triangle. Two charges, q1 = +5.0 ìC and q2 = -2.0 ìC are 0.50 m apart. A third charge, q3 = +6.0 ìC is brought from infinity to a spot 0.50 m from both charges so that the three charges form an

    asked on April 28, 2011
  2. Physics

    A boy throws a 4-kg pumpkin at 8m/s to a 40kg girl on roller skates, who catches it. At what speed does the girl then move backwards?

    asked on December 31, 2009
  3. Finance

    Omega Instruments has budgeted $300,000 per year to pay for certain ce- ramic parts over the next 5 years. If the company expects the cost of the parts to increase uniformly according to an arith- metic gradient of $1 0,000 per year, what is it expecting

    asked on May 26, 2013
  4. Chemistry

    A 1.0 mL volume of 0.010 M H2SO4 is added to a mixture of 6 drops of 0.010 M HIO3, 14 drops of deionized water, and 1 drop of starch solution. A color change in the reaction mixture occurred after 56 seconds. a. Assuming 20 drops per milliliter for all

    asked on February 2, 2016
  5. English (Reunion by John Cheever)

    In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does

    asked on November 30, 2014
  6. Precalc

    Solve the following equation for x in terms of ln and e. (2e^3)-6-(16e^-x)=0

    asked on March 3, 2014
  7. PreCalc PLEASE HELP

    Ms Farnum was hired for a new job at a salary of $62,500 and was promised a 5% raise each year. What would Ms.Farnum's salary be, to the nearest dollar, after working there for 6 years?

    asked on March 23, 2014
  8. calculus

    For what value of the constant c is the function f continuous on the interval negative infinity to positive infinity? f(x)={cx2+7x if x or =2

    asked on September 16, 2011
  9. chemistry

    Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

    asked on February 15, 2015
  10. science

    joey drives his car 7 kilometers north. he stops for lunch and then drives 5 kilometers south. what distance did he cover?

    asked on January 27, 2014
  11. Spanish

    What is this in Spanish: You get dressed at 8 o'clock. Te vistes a las ocho. ? Is this the correct translation? If not, then what is the correct translation?

    asked on May 3, 2010
  12. Physics

    List the fossil fuels in order in which they will probably be used up.

    asked on January 1, 2010

    A plumber, electrician and painter were all hired to work on 3 different house. For Adam's house, a plumber worked a total of 35 hours, an electrician worked 42 hours and a painter needed 29 hrs to complete the job. the total cost of the three workers for

    asked on May 24, 2014
  14. Math

    The elevation of the surface of the Dead Sea is -424.3 meters. In 2005, the height of Mt. Everest was 8,844.33 meters. How much highernwas the summit of Mt. Everest?

    asked on April 21, 2013
  15. physics

    A roller coaster of mass 1000.0 kg passes point A with a speed of 1.80 m/s? point a= 30m point b= 0m point c= 25m point d= 12m 1. What is the total mechanical energy of the roller coaster at point A? 2. What is the speed of the roller coaster at point B?

    asked on April 24, 2011
  16. physics

    1. The physics of Mars and its two moons. Mars has two moons, Phobos and Deimos (Fear and Panic, the companions of Mars, the god of war). Deimos has a period of 30 h, 18 min and a mean distance from the centre of Mars of 2.3 x 104 km. If the period of

    asked on April 24, 2011
  17. physics

    In moving a standard computer mouse, a user applies a horizontal force of 6.00×10−2 N. The mouse has a mass of 125 g. (a) What is the acceleration of the mouse? Ignore forces like friction that oppose its motion. (b) Assuming it starts from rest, what

    asked on December 2, 2010
  18. Math last one!

    Simifly the expression X x X2 x multiplied by x to the 2 power would it be x times x times x?

    asked on October 20, 2010
  19. trig

    If cot(x) = −19/18 , where x is in Quadrant IV, what is the exact value of sin(2x)?

    asked on September 4, 2010
  20. Physics

    Approximately 4 x 10^9 kg of matter is converted into enery in the sun per second. Express the power output of the sun in watts.

    asked on December 31, 2009
  21. Physics

    6m due south,10m due east and 5m due north. Find the distance traveled and the displacement of the vector

    asked on July 16, 2017
  22. Math

    the ratio of the base of an isoceles triangle to one of the legs if the base is 10cm long and the leg is 4 cm less than twice the length of the base

    asked on November 9, 2016
  23. math

    plz plz I need this immediately "a man sold his stack of eggs for Rs.240.if he had 2 dozen more ,he would have got the same money by selling the whole of 0.5 per dozen many dozen eggs does he sell?"(solution)

    asked on January 26, 2016
  24. physics

    A plane accelerates from rest at a constant rate of 5.00 m/s2 along a runway that is 1800 m long. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time tTO needed to take off?

    asked on September 18, 2015
  25. English (Reunion by John Cheever)

    What is the significance of the title? Although the the story depicts Charlie's reunion with his father the word reunion id used without a definite or an indefinite article. Why?

    asked on December 1, 2014
  26. Environmental Science

    India’s prime minister puts you in charge of that nation’s population policy. India has a population growth rate of 1.6% per year, a TFR of 2.7, a 49% rate of contraceptive use, and a population that is 71% rural. What policy steps would you recommend,

    asked on September 28, 2014
  27. Environmental Science

    What are some common justifications for environmental policy?

    asked on September 20, 2014
  28. Algebra1

    Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253.

    asked on April 22, 2014
  29. practice question

    How do i go about solving this one? A cash flow sequence starts in year 1 at $3000 and decreases by $200 each year through year 10. (a) Determine the value of the gradient G; (b) determine the amount of cash flow in year 8; and (c) determine the value of n

    asked on May 26, 2013
  30. Math

    Sarah was cutting fabric for a quilt. She cut a strip of fabric that was 19 1/8 inches long into 5 equal pieces. When she was finished cutting Sarah had a piece that was 2 1/4 inches long. How long was each piece that she cut for the quilt?

    asked on April 21, 2013
  31. calculus

    For what value of the constant c is the function f continuous on the interval negative infinity to positive infinity? f(x)={cx2+7x if x

    asked on September 16, 2011
  32. physics

    The physics of moving a small charge through a potential difference. How much work is needed to move a -8.0 ìC charge from ground to a point whose potential is +75 V?

    asked on April 28, 2011
  33. physics

    The physics of the DNA molecule. The two strands of the DNA molecule are held together by electrostatic forces. There are four bases which make up the DNA molecule, thymine (T), adenine (A), cytosine (C), and guanine (G). In two of the bases, thymine and

    asked on April 28, 2011
  34. physics

    One of the moons of Jupiter is Io. The distance between the centre of Jupiter and the centre of Io is 4.22 x 10^8 m. If the force of gravitational attraction between Io and Jupiter is 6.35 x 10^22 N, what must be the mass of Io?

    asked on April 24, 2011
  35. chemistry

    A 10.00g sample of a mixture of CH4 and C2H4react with O2 at 25C and 1 atm to produce CO2 and water. If the reaction produces 520kJ of heat what is the mass percent of CH4 in the mixture? I don't want the answer just how to o

    asked on March 14, 2011
  36. math formula?

    Mary would like to save $10 000 at the end of 5 years for a future down payment on a car. How much should she deposit at the end of each week in a savings account that pays 12%/a, compounded monthly, to meet her goal? d. Determine the weekly deposit

    asked on January 20, 2011
  37. Math

    Jarrels goal is to be half finished with the book he is reading by friday. By wednesday he has read 1/3 of the book.How much more does he need to read to meet his goal?

    asked on October 21, 2010
  38. maatthh

    2 5/7 + 1 2/5 + 3 2/7 , I change alll the denominators to 70 right?

    asked on October 20, 2010
  39. math

    1,2,4,8,16,32,64 in exponential form?

    asked on October 19, 2010
  40. Scientific studies

    A toy air rocket is launched vertically with an initial velocity of 22m/s. (a) How long does it take to reach its maximum height (v=0m/s? (b) How long does it take to return to the ground (x-0m)?

    asked on February 17, 2010
  41. Physics

    What is the kinetic energy of a 1500 kilogram object moving at 25 m/s?

    asked on December 31, 2009
  42. Chemistry

    Calculate the number of moles of solute in 497.2 L of 0.815 M sodium cyanide?

    asked on June 29, 2017
  43. English

    (1) I get a kick out of creating model airplanes. (2) I've been making them since I was knee-high to a grasshopper. (3) My grandfather used to fly bush planes in the Outback. (4) He would tell me stories and say that he and I were two peas in a pod. Which

    asked on March 16, 2017
  44. math

    At 6 A.M., Dylan and his neighbor, Mickey, drove in their cars to a city that was 300 miles away from their neighborhood. When Dylan reached the city, Mickey had 50 miles to go. He finally completed the trip 48 minutes later. A) How long did it take Mickey

    asked on April 28, 2016
  45. Math

    Sam had foreign stamps and local stamps. After giving 1/4 of his foreign stamps and 11 local stamps, he had an equal number of foreign and local stamps. How many local stamps did he have in the beginning? I got 32 for the answer by guessing and checking

    asked on April 27, 2016
  46. Math

    Emilio left Main Road at 8 A.M and arrived at Lame Lane at 2 P.M. His average for the whole journey was 60 mph. For the first 70% of the trip, he drove at an average speed of 65 mph. For the next 25% of the remaining trip, his average was 54 mph. Find his

    asked on April 27, 2016
  47. physics

    a 45N force is applied to a 9.6 kg object, what is the acceleration.

    asked on April 14, 2016

    I did a lab on the colorimetric determination of iron concentration and I'm not sure how to convert fe conc into ppm. For example, how would i convert 0.6 ug/ml to ppm?

    asked on March 26, 2016
  49. Science Experiment Help (pt 2)

    did the experiment (correctly this time), still need help with the answer to this question: What other mixture can be separated by crystallization? thnx for the help!

    asked on March 14, 2016
  50. Science Experiment Help

    Just need help answering this one question for my science experiment: "Name another mixture that could be separated like the sugar-water mixture." the sugar-water turned into caramel when I heated it... so what other mixtures do that? Thnx for the help!

    asked on March 13, 2016
  51. spanish!!!

    which was not found in the ancient maya culture? pyramids hieroglyphics ball courts ** roof gardens Which is a yearly festival in the united states? National Salvadoran- american day pupusa festival ** salvadoran folkore week salvadoran new year

    asked on March 10, 2016
  52. la

    2. Based on the context clues, what is the meaning of the word catalpa in Line 27 of the poem? (The poem is Almost Summer Sky by Jacqueline Woodson) Line 27: No, upstate they got maple and catalpa and scotch pine, A a location upstate B a species of

    asked on March 6, 2016
  53. Physics

    A bike pump has a 2.3 cm diameter piston that can move a maximum length of 35 cm. How much work is done on the air in the pump if the initial pressure is 1 atm and the final pressure is 4.4 atm?

    asked on February 23, 2016
  54. Physics

    A 2 kg steel ball strikes a wall with a speed of 13.9 m/s at an angle of 54.5 ◦ with the normal to the wall. It bounces off with the same speed and angle, as shown. If the ball is in contact with the wall for 0.277 s, what is the magnitude of the average

    asked on February 12, 2016
  55. math

    I still not got the condition plz explain... Eggs) * (Price) = 240 (Eggs + 2) * (Price - 0.5) = 240

    asked on January 26, 2016
  56. Biology

    What is formed when water molecules breaks apart?

    asked on November 11, 2015
  57. Physics

    A car travels due east with a speed of 40.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 54.0° with the vertical. Find the velocity of the rain

    asked on September 29, 2015
  58. physics

    a) What is the magnitude of the electric field at a point midway between a −8.5μC and a +8.5μC charge 8.0cm apart? Assume no other charges are nearby. b) What is the direction of the electric field?

    asked on July 8, 2015
  59. math

    At 8 A.M., Dylan and his neighbor, Mickey, drove in their cars to a city that was 240 mi. away from their neighborhood. When Dylan reached the city, Mickey had 40 mi. to go. He finally completed the trip 48 minutes later. a) How long did it take Mickey to

    asked on February 27, 2015
  60. English (Urgent)

    In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does

    asked on November 30, 2014
  61. English

    What are some similarities and differences between the poems "i sing of Olaf glad and big" and "Night, Death, Mississippi"?

    asked on September 26, 2014
  62. Math

    Matt who stands at 68 inches tall casts an 8 foot shadow at the same time a pear tree casts a 21 foot shadow. How tall is the tree?

    asked on September 3, 2014
  63. Algebra1

    What is the domain of the following function? f(x) = √ -x + 2 - 1

    asked on July 30, 2014

    In the book, how does Gatsby's flaws and idealism represent the best and the worst about the American Dream?

    asked on June 12, 2014

    Solve for "x" and "y" given the following matrix equation: (2x, 0.5y, -2, 1) * (3, -2, 0, 1) = (-24, 19, -6, 5) (the matrices are going from left to right, they're all 2x2's.)

    asked on May 25, 2014
  66. PRECALC HELPPP please

    A local photo gallery sells 3 different types of picture packages: economic, standard and luxury. The table below shows the number of pictures and packages given in each of the 3 packages; Package: Wallet: 4x6: 8x10: Economic 10 4 1 Standard 20 4 2 Luxury

    asked on May 24, 2014
  67. Canadian History

    1) The essential question for the last few lessons asks "How did Canada seek to establish economic security and social justice from the period of the depression to the patriation of the Constitution? What kind of economic security did the Canadians seek?

    asked on May 9, 2014
  68. PRE CALC

    Evaluate: sigma notation of (3cos k(pi) +1) start value: k=0 end value: k=3

    asked on April 3, 2014
  69. PRE CALC

    The 20th term of an arithmetic sequence is 27 and the first term is -11. What is the common difference??

    asked on April 2, 2014
  70. PreCalc PLEASE HELP

    Find the common ratio, r, for the geometric sequence that has a1= 100 and a8= 25/32

    asked on March 23, 2014

    what is a scenario in which REDUCING the time of impact would be beneficial?

    asked on March 10, 2014
  72. Pre-Calc Help please

    Solve for x: log base5 (4x) + log base5 (x) = log base5 (64)

    asked on March 4, 2014
  73. Pre Calc

    Solve the following inequality in terms of natural logarithms (ln). (e^6x)+2 is less than or equal to 3.

    asked on March 3, 2014
  74. Pre-Calc

    Solve for x: log base27 (2x-1) = 4/3

    asked on March 2, 2014
  75. Pre-Calculus

    Find N if log base 6 (6^7.8)=N

    asked on March 2, 2014
  76. History

    When was the first contact of the following first nations people of canada: First nations of the Mackenzie and Yukon River Basins Pacific coast first nations Plateau Fist Nations Plains first nations

    asked on February 20, 2014
  77. English

    Lord of the flies questions 1-7 Although it appears that Ralph and jack would become good friends strain is being placed on their friendship. The boys seem to be from two different world, "There was the brilliant world of hunting, tactics, fierce

    asked on February 19, 2014
  78. social studies

    during the early 1800s the United States tried to make peace with other countries in order to grow and develop. give an example of one of those peace efforts and briefly explain what it tried to accomplish

    asked on February 10, 2014
  79. physics

    a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. at what time is the ball 20 m above the ground?

    asked on December 1, 2013
  80. physics. again.

    a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. at what time after being struck is the ball moving at 10 m/s upwards? where is the baseball at this time? answer= 67.9m I need to know how to get this answer

    asked on December 1, 2013
  81. Physics

    a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. to what height did the ball rise. t=7.72 s the answer is 73 m, but how do you get that answer

    asked on December 1, 2013
  82. physics URGENT

    3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?

    asked on November 28, 2013
  83. Math

    The students sold children's ticket for $30 per ticket and adult tickets for $40 for a total of $930. Write an equation for the scenario and determine the x and y intercept.

    asked on November 4, 2013
  84. Physics

    1) what does the y intercept on a force vs acceleration graph represent? 2)what is the relationship of mass and acceleration?

    asked on October 30, 2013

    PLS HELP, BEEN STUCK FOREVER ON TWO QUESTIONS, THIS IS ONE : There are usually no costs for the first 3 years, but thereafter maintenance is re- quired for restriping, weed control, light replacement, shoulder repairs, etc. For one section of a particular

    asked on June 24, 2013
  86. Finance

    A building is priced at 125,000. If a down payment of 25,000 is made and a payment of 1,000 every month thereafter is required, how many months will it take to pay for the building? Interest is charged at a rate of 9% compounded monthly.

    asked on May 26, 2013
  87. economics

    Pls Help. Not too sure how to do this question. Someone wants to set aside money for their newborn daughters college funds. He estimates she would need 25,000 on her 17, 18, 19 and 20, birthdays. If he plans to make uniform deposits starting 3 years from

    asked on May 26, 2013
  88. chemistry

    lewis structure of HOCH2S-

    asked on March 13, 2013
  89. science

    You are standing stationary along the side of the railroad tracks. A toy cannon shoots a baseball at 9 m/s. The cannon is mounted facing forward on the handlebars of a bike. Your friend is riding the bike from the front toward the back of a train car at 5

    asked on February 26, 2013
  90. math

    (16xy^3/-24x^4y)^-3 simplify the rational expression in the form A/B. Single fraction with only positive exponents.

    asked on January 19, 2013
  91. math

    *cubic square root*125h^9s^1/*cubic square root*h^-6s^-1 The expression above equals kh^rs^t where r, the exponent of h, is..? and t, the exponent of s, is...? and k, the leading coefficient is...? all answers should be rational numbers

    asked on January 19, 2013
  92. math

    Simplify the rational expression in the form A/B. X^-2+X^-4. Express the final result in a single fraction using positive exponents only.

    asked on January 19, 2013
  93. precal

    fixed typo ((sinx + cosx)/(1 + tanx))^2 + ((sinx - cosx)/(1 - cotx))^2 = 1

    asked on November 2, 2012
  94. precal

    please help i can't find the answer for this question. i can only manipulate one side of the equation and the end result has to equal the other side. Problem 1. ((1 + sinx)/cosx) + (cosx/(1 + sinx)) = 2secx

    asked on November 2, 2012
  95. chem

    Is this the correct equatioin for the reaction of cyclohexene with MnO4- ? C6H10 + MnO4- ----> C6H10(OH)2 + MnO2

    asked on February 20, 2012
  96. Physics

    A skier of mass 71.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 62.2 m up a 37.0 slope (assumed to be fric- tionless) at a constant speed of 2.0 m/s? The acceleration of gravity is 9.81 m/s2 .

    asked on January 9, 2012
  97. chemistry

    One of the by-products of a reaction is 2-methyl-2-butene. A) Suggest a mechanistic pathway for the formation of this alkene. B) How is this by-product removed during the purification?

    asked on October 28, 2011
  98. science

    An average diameter of a star is approximately 109 m and an average diameter of a galaxy is 1021 m. Considering the given data, apply a sense of scale calculation to determine if when a galaxy’s diameter is scaled down to the length of Manhattan (21.6 km

    asked on October 10, 2011
  99. calculus

    Follow this link please! It is an interactive question that I just cannot figure out

    asked on September 16, 2011
  100. medical billing and coding

    which of the following is an expanded option for participation in private health care plans? A-medicare part A. B-Medicare part B. C- medicare advantage or D- medigap

    asked on August 28, 2011


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