allen

Newest questions and responses by allen
  1. Math

    Did I simplify these together correctly (2-3i)-(3+5i)? 1) I distributed the negative through 3+5i and got -3-5i 2) then I eventually after that let the 2-3i the same so I have it as: 2-3i-3-5i 3) (2-3) -(-3i-5i) 4) 2-3=-1 and -3-5=-8 5) so eventually in

    asked on November 1, 2018
  2. science

    In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

    asked on October 23, 2018
  3. science

    In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

    asked on October 23, 2018
  4. physics

    if a ball is thrown downward from a roof top 100meters tall and hits the ground in 3 seconds how hard is it thrown?

    asked on September 19, 2018
  5. Chemistry

    Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money? A. Rolaids (550 mg CaCO3 and 110 mg Mg(OH)2 per tablet) – 150 tablets for $9.44 B. Tums (500 mg CaCO3 per tablet) – 150

    asked on March 5, 2018
  6. physics

    What is the momentum of a 60 kg sprinter running at 8.0 m/s?

    asked on February 6, 2018
  7. APUSH

    How have perspectives about health and conservation changed since the late 1800s?

    asked on January 25, 2018
  8. physics

    A toaster oven operating at 800 W of power takes 60 min to bake a potato. How much energy is this in joules? How much energy is this in kilowatt-hours?

    asked on January 24, 2018
  9. Math

    Can anyone help with this question? Your backpack contains 2010 chocolate bars, which you are going to divide between your best friend and yourself. You think you are a nice person, so you will give your best friend more than zero chocolate bars. However,

    asked on September 6, 2017
  10. Chemistry

    How many mL of 0.0257 N KIO3 would be needed to reach the end-point in the oxidation of 34.2 mL of 0.0416N hydrazine in hydrochloric acid solution

    asked on June 4, 2017
  11. Trig

    To help a young tree grow straight, a gardener attaches three guy wires to it and the ground. She places the wires two feet below the top of the tree. If the wires are ten feet long and each makes an angle of 58 degrees with the ground. Find the height of

    asked on May 8, 2017
  12. algebra

    A tower 25 meters tall casts a shadow 20.8 meters long. What is the distance from the top of the tower to the end of the shadow?

    asked on May 7, 2017
  13. Math

    Sarah had got 40 out of 50 questions right. What is the percentage of questions Sarah got right? Explain and show your work.

    asked on March 30, 2017
  14. math help? burnet help.

    How is the the graph of y=1/4x -4 obtained from the graph of y=1/x? Horizontally stretched by a factor of 4 and shifted up by 4 units. Vertically stretched by a factor of 4 and shifted down by 4 units. < my answer Horizontally compressed by a factor of 4

    asked on March 27, 2017
  15. Math

    A decorative pottery bowl with a diameter of 30 cm is used as a garden ornament . A rain shower fills it with water to a maximum depth of 7 cm. The bowl is slowly tipped to remove the water. What angle will the rim of the bowl make with the horizontal when

    asked on November 24, 2016
  16. chemistry

    A solution containing 40 g of calcium bromide requires 14.2 g of chlorine to react completely with it and 22,2 g of calcium chloride is produced in addition to ehaever bromine is obtained. How many grams of calcium bromide are required to produce 10.0

    asked on October 1, 2016
  17. Physics

    A car travelling at 90 km/hr sounds it horn as it approaches a stationary cyclist.if the car horn is at 512 Hz and temperature of air is 10 degree centigrade, what is the frequency of the sound waves reaching the cyclist as car approaches.

    asked on June 5, 2016
  18. Physics

    What is the final speed of an object and how far does it travel while accclerating if its initial speed is 10m/s and it accelerates at 8.9m/s squared for 5 s

    asked on May 3, 2016
  19. Physics

    if mars orbits the sun at an angular velocity of 1.06x10-7 rad/s, how long is a year on mars in earth days assuming it travels in a circular orbit?pls explain

    asked on January 10, 2016
  20. united

    write five sentience about my birthday

    asked on November 4, 2015
  21. Math

    Estimate. Then find the sum 540,943 + 382093

    asked on October 6, 2015
  22. Ap European

    In what respect must each of the following share in the war guilt? World war 1 Austria,Serbia,Russia,France,Britain,German

    asked on April 22, 2015
  23. Ap European

    In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany

    asked on April 22, 2015
  24. English

    In america, our government is based on the principles of society and the rights of man. do you agree or disagree? List at list 3 example.

    asked on April 21, 2015
  25. Physic

    A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

    asked on April 12, 2015
  26. Physic

    A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

    asked on April 12, 2015
  27. Physic

    Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

    asked on April 12, 2015
  28. Physic

    A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

    asked on April 9, 2015
  29. Physic

    Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

    asked on April 9, 2015
  30. Physic

    A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

    asked on April 9, 2015
  31. math

    Identify the solution(s) of the system of equations, if any. x + 2y = 7 3x - 6y = 3 (4, ) (4, ) (, 4) (, 4)

    asked on October 21, 2014
  32. math

    what the difference of 13 over 32 and 1 over 2

    asked on October 16, 2014
  33. corporate finance

    Your finance text book sold 45,500 copies in its first year. The publishing company expects the sales to grow at a rate of 20.0 percent for the next three years, and by 7.0 percent in the fourth year. Calculate the total number of copies that the publisher

    asked on July 30, 2014
  34. physics

    Calculate the speed of water (in m/s) flowing from a pipe at the bottom of an open topped barrel which has a water level 138 cm high in it.

    asked on June 21, 2014
  35. physics

    A sound registers 77.9 decibels on a detector. What is the intensity in W/m2? Assume the threshold of human hearing is 1.0×10-12 W/m2. Give your answer in picowatts/m2. 1 pW = 1×10-12 W/m2

    asked on June 21, 2014
  36. physics

    Calculate the speed of a wave in m/s along a taut string with tension 139 Newtons and a mass per unit length of 3.6 grams per metre.

    asked on June 21, 2014
  37. college physics

    "The Magnitude of the buoyant force is equal to the weight of fluid displaced” is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilli’s Principle d. The Equation of Continuity

    asked on June 16, 2014
  38. physics

    An object of mass 1.6 kg is dropped from a height of 2.9 metres. It lands with a speed of 2.8 m/s. How much energy was lost due to air resistance? (Give your answer to 2 s.f., expressed as a magnitude)

    asked on June 9, 2014
  39. physics

    Calculate the magnitude of the force if a ball of mass 249.9 grams, and initial velocity +16.5 m/s is struck back on the same path with a final velocity of -22.0 m/s. Assume the contact time is 3.1 milliseconds. Use 2 s.f.

    asked on June 9, 2014
  40. physics

    An astronaut, mass 128.2 kg including spacesuit, pushes off from the International Space Station (mass 110 tons) with a speed of 1.2 m/s. What is the speed of the Space station in the opposite direction? Use 2 s f. for your answer

    asked on June 9, 2014
  41. Physics

    A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

    asked on June 5, 2014
  42. Physics

    A block of mass 12.0 kg is initially sitting at rest on a 30.0o incline. There is a spring mounted to the ramp with spring constant k = 13500 N/m. The block is released to slide down the incline and comes to a stop momentarily after the spring has been

    asked on May 30, 2014
  43. Chem

    Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Fe2++2e−→Fe;E∘=−0.440 V

    asked on May 18, 2014
  44. Language Arts (english)

    1.In general terms, how do the townspeople in “The Handsomest Drowned Man in the World” react to the body which washes up on their shore? 2.Why do the townspeople react to Esteban as they do? What is he to them? 3.What is a fable, how might “The

    asked on May 16, 2014
  45. Algebra

    How do I solve: One leg of a right triangle is 4 m longer than the other. If the length of the hypotenuse is 18 m, how long are the other two legs?

    asked on April 29, 2014
  46. Math

    Find the z-score such that the area under the standard normal curve to the left is 0.25

    asked on December 2, 2013
  47. math

    Find the value of z = 0.94

    asked on December 2, 2013
  48. Solid mensuration

    The bases of a triangular right prism are apart. find the volume and the total surface area of the prism if one side of the quilateral triangular base measures 6cm

    asked on April 25, 2013
  49. Physics

    In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

    asked on April 23, 2013
  50. physics

    A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

    asked on April 22, 2013
  51. Physics

    In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

    asked on April 22, 2013
  52. phics

    In an experiment on motion, a cart weighing 240 N was pulled up an inclined plane. Which of the following would be the expected reading on the spring scale as the cart is pulled up an inclined plane set upon two books

    asked on April 11, 2013
  53. math

    Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

    asked on February 20, 2013
  54. cmsd

    Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

    asked on February 20, 2013
  55. Math

    Mark bought 54 cm of lace and 2m 45cm of black lace. How much total lace in meters did he buy?

    asked on December 2, 2012
  56. posibility

    One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It

    asked on November 16, 2012
  57. Finance

    The following information was available as of the close of business June 1, 2004 on government of Canada bonds. Coupon...Maturity.....Price.....Yield 5.00%......June 1, 2005......102.35......2.60 10.50%......June 1, 2006......113.91......3.26

    asked on November 6, 2012
  58. Math 102

    What number must be added to the numerator and subtracted from the denominator of 10/23 to obtain a fraction equivalent of 6/5? Please provide step by step, this is a word problem for rational expressions. Thank you

    asked on October 4, 2012
  59. Business- Labor

    true or false Arbitration and grievance procedures have done virtually nothing to prevent chaos and disorder in labor relations.

    asked on September 18, 2012
  60. finite math

    Given n(A')=23, n(B')=16, and n((A [intersect] B) U (AUB)'))= 24, find (A [intersect] B) I apologize but intersect was the best way I found to represent the upside down U symbol.

    asked on September 9, 2012
  61. Business- Labor

    how sympathetic are you to the statement of a former general motors chairman that offering a union leader a seat on GMs board of directors made "as much sense as having a member of GM's management sitting on the board of an international union?" Explain. I

    asked on September 6, 2012
  62. finite math

    suppose that 3 digits are selected at random from the set S={1,2,3,4,5,6} and are arranged in random order. Find the probability that the resulting 3-digit number is less than 300.

    asked on September 4, 2012
  63. Business- Labor

    governmental wage and price controls should never be tried again. they have been failures. agree? why or why not?

    asked on August 23, 2012
  64. Business- Labor

    do you believe that public employees should be able to employ collective bargaining for wage increases or should the ‘free market’ continue to dictate wages in the public sector? Why or why not?

    asked on August 23, 2012
  65. Business- Labor

    Labor’s membership stagnation in the last half-century can be explained by several formidable obstacles. Explain

    asked on August 12, 2012
  66. Physics

    For a record playing at 45 rpm, find the frequency and the angular velocity. Frequency= Angular velocity=

    asked on April 24, 2012
  67. chemistry

    How many grams of carbon can be burned in 15 dm3 of oxygen and many dm3 of CO2 is produced?

    asked on April 17, 2012
  68. chemistry

    how many grams of magnesium are required to liberate 250 cm3 of Hydrogen gas from HCL

    asked on April 17, 2012
  69. alebra

    how do i simplify 3m+n/4n^2m + 3m +n +5/4n^2m

    asked on March 1, 2012
  70. algebra

    how do i simpllify 5/x + 4/x^2 - 3/x^3

    asked on March 1, 2012
  71. physics

    if one man 50 kgs fell from 10 meter high builder, how much impact force when he hit the concrete ground and how long the time it happen.

    asked on February 21, 2012
  72. College Physics

    Find the minimum work required to carry a truckload of furniture weighing 1.99 104 N to a third-story apartment, 24.0 m above the truck.

    asked on October 14, 2011
  73. College Physics

    A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

    asked on October 14, 2011
  74. College Physics

    A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

    asked on October 14, 2011
  75. College Physics

    A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

    asked on October 14, 2011
  76. College Physics

    A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

    asked on October 14, 2011
  77. College Physics

    A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

    asked on October 14, 2011
  78. mystery trip

    can you help me unscramble this famous couple names enargraaetnmgremaad

    asked on October 11, 2011
  79. Physics

    During a baseball game, a batter hits a pop-up to a fielder 83 m away. The acceleration of gravity is 9.8 m/s^2. If the ball remains in the air for 6.5 s, how high does it rise? Answer in units of m

    asked on October 1, 2011
  80. english 30-1

    write a short compostion discussing social satire in happy event. what aspects of society is satized? how are devices like irony and hyperbole is used to achieve satire? what changes does the author suggest?

    asked on September 23, 2011
  81. Physics

    A baseball is tossed at a steep angle into the air and makes a smooth parabolic path. Its time in the air is t and it reaches a maximum height h. Assume that air resistance is negligible. a. Show that the height reached by the ball is gt^2/8. b. If the

    asked on July 17, 2011
  82. Physics

    A rock thrown from a bridge hits the water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t. a. Show that the virtical distance of the bridge above water is 1/2gt^2. b. What is the

    asked on July 17, 2011
  83. mathematics

    2a^2-3a-2/4a^2-1 (4a^2-1 = denominator) divided by a^2-4/2a^2-5a+2

    asked on July 3, 2011
  84. physics

    If you do 100 j work in 50 seconds, then your Power output is

    asked on June 18, 2011
  85. statistics

    In a binomial distribution: A) the random variable X is continuous. B)the probability of event of interest (pie symbol)is stable from trail to trial C) the number of trials n must be at least 30 D) the results of one trial are dependent on the results of

    asked on June 10, 2011
  86. MATH(quick Help please)

    Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Show work thanks

    asked on June 6, 2011
  87. Health(quick question)

    why do you need Fiber in foods and is it used to build up muscles

    asked on June 4, 2011
  88. ELA (QUICK QUESTION)

    i need some postive and negative aspects of schools. i need help starting my intro can you help me thanks

    asked on May 31, 2011
  89. Math

    Here's a frequency distribution table for the speeds of a sample of automobiles. Speed(MPH) Frequency Midpoint(I found) 50-54 2 52 55-59 4 57 60-64 5 62 65-69 10 67 70-74 9 72 75-79 5 77 I am trying to find the variance but whatever I do I can't seem to

    asked on May 27, 2011
  90. please explain poster thx

    i found this propaganda poster can you explain it on the poster it says When you ride Alone you ride with Hitler. The next poster i found was Be ready join now CAn you explain these two posters thanks

    asked on May 26, 2011
  91. Ela(summary)

    Can you give my a nice summary for milk weed? i really don't get the book i read it

    asked on May 20, 2011
  92. History

    Why did Arthur Ashe created the National Junior Tennis?

    asked on May 16, 2011
  93. SCIENCE(easy)

    explain what might happen to a boulder(large/rock) that is left in your school yard for a long time.

    asked on May 15, 2011
  94. TECH(recycle)

    I'm making a recycle logo i need some good ideas to put in the logo and can u give me examples of good recycling logos

    asked on May 9, 2011
  95. logos

    i need some amazing logos can u help

    asked on May 6, 2011
  96. free verse poems please

    i need really good examples of free verse poems please

    asked on May 5, 2011
  97. POEMS tanka poem

    examples of tanka poems thanks

    asked on May 5, 2011
  98. poems

    I NEED EXAMPLES OF HAIKU POEMS

    asked on May 5, 2011
  99. math

    Condensing 1/2logs+logm+logh-2logI-logd-logk logt+logh+logx-2logl-log0-logl

    asked on May 5, 2011
  100. math

    solve -4+7logx=10 & log(x+3)+log(x-2)=log14

    asked on May 5, 2011

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