Questions Asked on
March 19, 2011

  1. Physics

    In the figure, a chain consisting of five links, each of mass 0.100 kg, is lifted vertically with constant acceleration of magnitude a = 2.50 m/s2. Find the magnitudes of (a) the force on link 1 from link 2, (b) the force on link 2 from link 3, (c) the

    asked by Sarah
  2. English

    just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more

    asked by Ann
  3. chemistry

    What temperature is required to produce a carbon dioxide partial pressure of 1.0 ? BaCO3¡êBaO + CO2

    asked by vince
  4. calculus

    how do you separate these variables dy/dx=4sqrt(y)lnx/x, y(e)=9

    asked by may
  5. mete

    Three point charges lie along a circle of radius r at angles of 30°, 150°, and 270° as shown in the figure below. Find a symbolic expression for the resultant electric field at the center of the circle.

    asked by Mina
  6. algebra

    13x+11y=70 11x+13y=74

    asked by simultaneous
  7. chemistry

    How many mol of Oxygen are in 45.9 grams of CO2?

    asked by Anonymous
  8. Chemistry

    I have two questions: 1. A sample of 10.7 g of CO reacts completely with O2 to form CO2. How many grams of CO2 will be formed? 2. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2 g of ammonia are reacted with

    asked by Lauren
  9. calculus

    find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7

    asked by matthew
  10. physics

    A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?

    asked by Beth
  11. math

    John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for $5,000. Freight charges of $300 were paid in cash.John's returned some of the

    asked by Bobbi Loffredo
  12. Calculus

    Luke and Leia are trapped inside a trash compactor on the Death Star. The side walls are moving apart at 0.1 m/sec, but the end walls are moving together at 0.3 m/sec. The volume of liquid inside the compactor is 20 cubic meters, a constant. Write an

    asked by Amanda E.
  13. Chemistry

    How many grams of SO2 can be produced from 100g of S and excess O2

    asked by Mo
  14. PHYSICS

    WHAT TYPE OF MIRRORS ARE USED IN A PERISCOPE(CONCAVE, CONVEX?) ALSO,DRAW A RAY DIAGRAM OF A PERISCOPE

    asked by ADAM
  15. math/ geometry.

    the vertex angle of an isoceles triangle is 120. the base length is 18. what is the length of the altitude to the base in simplest form

    asked by Juleana
  16. Spanish

    ? Select the number which best completes this sequence: 200, 400, 600 A. ochocientos

    asked by anon
  17. chemistry

    Concentrated nitric acid is 16M. What volume of nitric acid must be diluted must with distilled water to prepare 5L of 0.1M nitric acid?

    asked by please help
  18. Chemistry (repost)

    Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)---> K2SO4(aq) + 2 H2O(l) a) 26 mL of 0.240 M H2SO4 b) 143 mL of 0.14 M

    asked by Rebekah
  19. physics

    Three point charges lie along a circle of radius r at angles of 30°, 150°, and 270° as shown in the figure below. Find a symbolic expression for the resultant electric field at the center of the circle.

    asked by Mina
  20. Physics

    A wheel with radius R, mass m, and rotational inertia I rolls without slipping across the ground.  If its translational kinetic energy is E, what is its rotational kinetic energy?

    asked by John
  21. trig

    For each expression in column I, choose the expression from column II to complete an identity: Column I Column II 1. -tanxcosx A. sin^2x/cos^2x 2. sec^2x-1 B. 1/sec^2x 3. sec x/cscx C. sin(-x) 4. 1+sin^2x D.csc^2x-cot^2x+sin^2x 5. cos^2 x E. tanx I figured

    asked by gin
  22. calculus

    A rancher has 1000 feet of fencing with which to enclose two adjacent rectangular corrals with a interior partition (consider as one pen). Use calculus to determine what the external dimensions of the pen that will maximize the enclosed area. Write your

    asked by Anonymous
  23. Physics

    A 3 Kg lead ball is dropped into a 3 L insulated pail of water initially at 20.0 degrees C. If the final temperature of the water-lead combination is 25 degress C, what was the initial temperature of the lead ball?

    asked by Kelsey
  24. algebra

    Lisa studies 8 hrs. for a particular test and gets a score of 78. at this rate how many hours would she have to study to get a score of 98?

    asked by Kim
  25. geometry

    The equal sides of an isosceles trapezoid each measure 5, and its altitude measures 4. If the area of the trapezoid is 48, find the lengths of its bases.

    asked by Tracy
  26. Algebra

    Michael invested his savings in two investment funds. The amount he invested in Fund A was $2,000 less than the amount he invested in Fund B. Fund A returned a 4% profit and Fund B returned a 3% profit. How much did he invest in Fund A, if the total profit

    asked by B
  27. Physics

    A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating.  At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2.  How does this

    asked by John
  28. physics

    A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is μs = 1.0. If the radius of the curve is 40 m, what is the maximum speed at which the car can turn without sliding? Assume that the car is

    asked by HELP!!!!
  29. math

    ethan had $8 more than dakota. ethan then gave 1/4 od hia money to dakota. the ratio of money ethan had to the money dakota had then became 5:7. howmuch money did ethan give to dakota

    asked by Eve
  30. science

    Describe one region of the world where this hypothetical isotherm pattern is actually observed.

    asked by malik
  31. Physics

    A ball rolls along a horizontal frictionless surface without slipping toward and incline.  The ball moves up the incline a certain distance before reversing direction and moving back down the incline.  In which of the following situations does the ball

    asked by John
  32. Psychology

    Which one of the following statements about the gate-control theory is true? Pain impulses create a gate leading to the brain. The brain is capable of generating pain on its own. The gate closes when pain messages go to the brain. Damage to small nerve

    asked by Chloe
  33. physics

    speedway turn, with radius of curvature R, is banked at an angle θ above the horizontal. (a) What is the optimal speed at which to take the turn if the track's surface is iced over (that is, if there is very little friction between the tires and the

    asked by Hard to solve ..please help!!!!
  34. physics

    A ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?

    asked by laila
  35. Psychology

    The "face module," located in the right temporal lobe of the brain, explains why: the cells fire when a dog lover looks at pictures of show dogs. infants are not afraid to go to strangers. ganglion cells in this area respond to simple features. we need

    asked by Chloe
  36. FRUSTRATIONS OF PROGRESS;CHAOSAND COMPLEXITY

    One of the greatest lasting social changes of the development of mass armies was the A. breakup of aristocracies. B. creation of national identities. C. complete militarization of European society. D. development of the idea of "total war."

    asked by Anonymous
  37. computer science

    9.16 Consider a system that uses pure demand paging. a. When a process first starts execution, how would you characterize the page fault rate? b. Once the working set for a process is loaded into memory, how would you characterize the page fault rate? c.

    asked by Anonymous
  38. Spanish

    Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly. 1.La princesa todavía canta. The princess used to sing. my answer: La pincesa cantaba. 2.¿Con quién llora la reina? Who does the queen sing

    asked by anon
  39. physics

    A hot stell ball of mass 1 kg is dropped into a 4 L bucket of water at room temperature (70 degrees F). If the system reaches an equilibrium temperature of 320 K, what was the initial temperature of the steel ball before it was dropped into the water? Cp

    asked by Meghan
  40. physics

    two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10m/s and the other is at rest. what is the velocity of the two cars after the collision?

    asked by Jenn
  41. Chemistry

    How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C? Show all work used to solve this problem.

    asked by Victoria Ann
  42. Math

    John's Specialty Store uses a periodic inventory system. The following are some inventory transactions for the month of May, 2009.

    asked by Bobbi Loffredo
  43. physics

    An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 2.6 x 10-7 C/m2, and the plates are separated by a distance of 1.4 x 10-2 m. How fast is the electron moving just before it

    asked by Amy
  44. chemistry

    If 74.5 grams of a hot metal was added to 56.4 grams of water and the temperature of the water rose from 20.4 to 33.4 degrees, how many KJ of energy was lost by the hot metal?

    asked by katie
  45. management

    What factors account for the resurgence of interest in OSCM today?

    asked by Anonymous
  46. chem

    What mass of NaCl is required to precipitate all the silver ions from 19.2 mL of 0.100 M AgNO3 solution?

    asked by Sara
  47. Physics

    A cylinder (I = 1/2 MR2), a sphere (I = 2/5MR2), and a hoop (I = MR2) roll without slipping down the same incline, beginning from rest at the same height.  All three objects share the same radius and total mass.  Which object has the greatest kinetic

    asked by John
  48. Spanish

    I'm not sure if this is the proper way to write the numbers in spanish . can you correct any mistakes please. 6. dos x cien = doscientos 7. tres x cien = trescientos 8. cinco x cien = quinientos 9. ocho x cien = ochocientos 10. nueve x cien = novecientos

    asked by anon
  49. chemistry

    What is the molar concentration of calcium hydroxide that has 0.185g solute in 100ml solution?

    asked by please help
  50. CHEMISTRY

    Concentrated HCI is 12M. What is the molarity of an HCI solution prepared by diluting 10ml concentrated HCI to a total volume of 250ml?

    asked by please help
  51. chem

    What is the molarity of ZnCl2(aq) that forms when 15.4 g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 175 mL.) Zn(s) + CuCl2(aq) --> ZnCl2(aq) + Cu(s) I got the moles of Zn but don't know what to

    asked by Rebekah
  52. Biology

    How does the structure of macromolecules such as proteins act as an index of relatedness between species?

    asked by Brittney
  53. algebral

    What is the electromagnetic flux coming from the surface of a 5000K blackbody? I am supposed to use maxwells equation.

    asked by james
  54. separation of variables

    solve the initial value problem by separation of variables dy/dx=x2/y given y=-5 when x=3

    asked by seth
  55. physics

    two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10m/s and the other is at rest. what is the velocity of the two cars after the collision?

    asked by Jenn
  56. trig

    {Given: cos(A)=\frac: sqrt{203}/{18} {Find: tan(A) Find the positive value of the above in simplest radical form.

    asked by bbee
  57. math

    Find the GCF of the numbers using an appropriate method. 240, 10,000, and 4500 Find the prime factorization of the number, and write it in exponent form. 670 Find the LCM for the given numbers by an appropriate method. 24, 54, and 27

    asked by anonymous
  58. english

    The Lady of Shalott I have an event and have to find the quotation. 1) The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. The quotation I think it is, is: A

    asked by george
  59. physics

    A particle is moving clockwise in a circle of radius 1.75 m. At a certain instant, the magnitude of its acceleration is a = a = 39.0 m/s2, and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this

    asked by HELP!!!!
  60. Elements of Statistics

    the world health organization's center of aids research is planning to write a report on aids infection among drug users all of the world. in a recent study conducted on 1,000,000 drug users, 52% indicated that they are using heroin on regular basis, 37%

    asked by Tina
  61. math

    1)Find the sum of the first eight terms of the Geometric progression 256,128,64,32 2)How many terms should be taken from the Geometric progression 4,12,36 for the sum to be 2188

    asked by la bellgoss
  62. Spanish

    Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly 1. El rey que canta está tocando el tambor. The king that used to sing is playing the drum. Can you check my answer: El rey que cantaba está

    asked by anon
  63. Algebra 1

    Two angles are complementary. The sum of the measures of the larger angle and three times the measure of the smaller angle is 114. What is the measure of each angle?

    asked by ekam
  64. English

    Do you think the last sentence links to intolerance, and do you think this paragraph makes sense? The only figurative device that is completely and effectively used in Night is first-person perspective. The use of first person conveys the incidents Wiesel

    asked by KK
  65. Chemistry

    2g NaHCO3 + .6 mL HCL --> NaCl+CO2+H2O How much carbon dioxide do I get? How do I find out?

    asked by Michelle
  66. math/ geomery

    the diagonals of a rhombus have lengths 4 and 12. what is the length of a side in simplest form.

    asked by Juleana
  67. Physics

    A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating.  At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2.  How does this

    asked by John
  68. physics

    Suppose the vertical loop has a radius of 8.92 m. What is the apparent weight (Wap) of a rider on the roller coaster at the bottom of the loop? (Assume that friction between roller coaster and rails can be neglected. Give your answer in terms of m and g.)

    asked by Hard to solve ..please help!!!!
  69. PreCalculus

    Writing to Learn: In a certain video game a cursor bounces back and forth horizontally across the screen at a constant rate. Its distance d from the center of the screen varies with time t and hence can be described as a function of t. Explain why this

    asked by Taylor
  70. math

    motorcycle race 1 lape=750m. at the start gina sets off 4 sec. after tom but drives the motorcycle 3.5m/s fasteran finishes in 2.5sec. sooner then tom. at what speed was gina driving?

    asked by Anonymous
  71. Geography

    Does Russia grow sugar beets or Ukraine?

    asked by Alyonka
  72. calculus

    The USPS will not mail a package if the sum of its length and its girth (measuring around the package) exceed 108 inches. Determine: (a) The volume of the package as a function of its radius r. (b) For which radius r is the volume of the package a maximum?

    asked by Anonymous
  73. DNA + Genetics

    During the menstrual cycle, the ovarian steroid hormones estrogen and progesterone control a dramatic transcriptional reprogramming of endometrial stromal cells (ESCs) leading to a receptive state for blastocyst implantation and the establishment of

    asked by Lena
  74. separation of variables

    how do you separate these variables dy/dx=1/y^2, y(0)=4

    asked by may
  75. chemistry

    Concentrated HCI is 12M. What is the moloarity of an HCI solution prepared by diluting 10ml concentrated HCI

    asked by please help
  76. math

    If two cars leave at the same time and are traveling in opposite directions, one car at 50 and the other at 55. How far away from each other will they be after 1 hours?

    asked by sam
  77. math

    Find the value of the missing digit that makes the statement true. 214,21_ is divisible by 11 Determine whether the statement is true or false. Why? If a natural number is divisible by 5 and 2, then it must also be divisible by 10.

    asked by anonymous
  78. Chemistry

    2g NaHCO3 + .6 mL HCL --> NaCl+CO2+H2O How much carbon dioxide do I get? How do I find out? I got 410 mL of CO2, is this correct?

    asked by Michelle
  79. Physics

    A cylinder ( I = 1/2 MR2), a sphere ( I = 2/5 MR2), and a hoop ( I = MR2) roll without slipping down the same incline, beginning from rest at the same height.  All three objects share the same radius and total mass.  Which object has the greatest

    asked by John
  80. MATH

    WHAT IS EQUIVALENT TO 11/3?

    asked by AD
  81. trig

    draw the graph of 4sin(x+30) and 2+tanx for values of x from 0 degree to 360degree and obtain the solution within the range of the equation 4sin(x+30)-tan x=2

    asked by mohamed kantabulah
  82. calculus

    how do you solve the initial value problem by using separation of variables dy/dx=1/y^2, y(0)=4

    asked by billy
  83. calculus

    how do you solve the initial value problem by using separation of variables dy/dx=1+x/(sqrt of y), y(2)=9

    asked by billy
  84. calculus

    solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4

    asked by sally
  85. separation of variables

    if dy/dx=-3y and y=1 when t=0, what is the value of t for which y=1/3?

    asked by catherine
  86. Geography

    Which river might be used to transport materials mined near Irkutsk to manufacturing centers?

    asked by Alyonka
  87. chemistry

    Abstract 4 chemistry of starch

    asked by Falayi
  88. Physics

    Please heeelp!!! A 65.0 kg diver is 2.10 m above the water, falling at speed of 6.70 m/s. Calculate her kinetic energy as she hits the water. (Neglect air friction)

    asked by Ly
  89. English

    I'm also noticing that theres some sort of problem with this paragraph but I...I don't know. Like im nots sure if its the right example and if it links to intolerance. The only figurative device that is completely and effectively used in this text is first

    asked by KK
  90. Math

    the original problem was: (sin x + cos x)^2 + (sin x - cos x)^2 = 2 steps too please I got 1 for (sin x + cos x)^2 but then what does (sin x - cos x)^2 become since it's minus?

    asked by Amy
  91. MUSIC

    How was the life style of buddy bolden and some ups and downs?describe some interesting things about the life of jelly roll morton?

    asked by SUBORNA
  92. Physics

    A uniform solid disk of radius 1.7 m and mass 81.3 kg is free to rotate on a frictionless pivot through a point on its rim. If the disk is released from rest in the position shown by the solid circle, what is the speed of its center of mass when the disk

    asked by Jennifer
  93. Physics

    Two sounds have measured intensities of I1 = 100 W/m2 and I2 = 300 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2?

    asked by Jane
  94. Calculus

    ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 -

    asked by Joe
  95. Math

    Sandy is making curtains from fabric that is 44 inches wide. Her curtain pattern is 27 inches long and 44 inches wide. How many yards of fabric will she need to make 5 curtains?

    asked by Carlyn
  96. english

    Write 9 sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. im so confused

    asked by michael
  97. Spanish

    The following paragraph describes what some may consider to be a typical North American tourist. It reflects one opinion only. North Americans whovisit foreign countries do not commonly fit this description. Read the paragraph. Then write your answersin

    asked by anon
  98. Sacramento city college

    When a vacuum is pulled on the water with a 29.4 in.Hg,What is vapor created for each pound of water removed in cubic feet?

    asked by Eric
  99. PHYSICS

    If Superman is flying at mach 4, 1 km above the ground and yells "Hey! Finish your test!" from directly overhead, what does it sound like when you finally hear him? Superman travels slower than light and therefore you don't hear him until he is 4.1231

    asked by Gabby
  100. bubba

    Find the GCF of the numbers using an appropriate method. 240, 10,000, and 4500 Find the prime factorization of the number, and write it in exponent form. 670 Find the LCM for the given numbers by an appropriate method. 24, 54, and 27

    asked by anonymous
  101. Calculus

    ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 -

    asked by Joe
  102. astronomy

    What is the electromagnetic flux coming from the surface of a 5000K blackbody?

    asked by james
  103. history

    I read up on most of the information concerning this subject, and I still need help. Japanese Internment When President Roosevelt issued Executive Order 9066 on February 19, 1942, he authorized the evacuation of Japanese-Americans from the West Coast. Why

    asked by David
  104. chemistry

    determine the quantity of NaOH whose concentration is 15% to neutralize 176g H2SO4 , this is the exact problem and no its not an experiment.

    asked by auro
  105. proper fraction to mixed number

    The instructions say to convert 3/4 - 1/8 to a mixed number the answer I have is 5/8 Can you convert a proper fraction to a mixed number ?? Suzanne

    asked by Suzanne
  106. chem.

    determine the quantity of NaOH whose concentration is 15% w/v to neutralize 176g H2SO4 , this is the exact problem and no its not an experiment. sorry to bother someone of you

    asked by auro
  107. Physics

    A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating.  At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2.  How does this

    asked by John
  108. SCIENCE

    is the value of g independent of mass?

    asked by TERRIE
  109. separatio of variables

    solve the initial value problem by separation of variables dy/dx=6x^2y and y(0)=4

    asked by seth
  110. math/geometry

    in a right triangle the adjacent is A = 4, the oppisite is B = 5, then what is the hypotenuse C.

    asked by Juleana
  111. Geometry

    in a right triangle if the adjacent A = 16, and the hypotenuse C = 20 then what is the oppisite B.

    asked by Cassandra
  112. math

    in a right triangle if the oppisite B = 2 times 5 squared, the adjacent A = 5 squared, then what is the hypotenuse C?????????

    asked by Lucy
  113. calculus

    solve the initial value problem by separation of variables dy/dx=-xy^2, y(1)=-0.25

    asked by sally
  114. separation of variables

    solving the initial value problem by separation of variables dy/dx=(4(sqrt of y)lnx))/x, y(e)=9

    asked by matthew
  115. separation of variables

    find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3

    asked by catherine
  116. calculus

    if f'(x)=2f(x) and f(2)=1, then f(x)= ?

    asked by mark
  117. Math

    1. the mystery shape has fawer than 3 lines of symmetry. 2. it has at least 1 pair of perpendicular sides. 3. it has at least 1 pair of parallel sides. 4. it has less than 1 obtuse angle.

    asked by Rayna
  118. Algebra

    Write 27/4 as a mixed number, I keep getting 6.75 but it does not seem correct, please confirm if it correct or if I am missing something.

    asked by Jeannie
  119. math

    integral of inverse root(8x+x^2)

    asked by njiru
  120. Physics

    A uniform board 12 ft long weighs 10 lbs. Two feet from the left is centered a 3 lbs. structure. How far from the left end is the balance point i.e. the point at which if you applied 13 lbs. upward force would balance the board and structure??

    asked by Jenn
  121. math

    a=c divided by7 b=a multiple of 5 less than 20 c= b divided by 6 d= a x c a = b= c= d=

    asked by lexi
  122. chemistry

    ok this problem has made me crazy , 15 % is w\v ok , so i just the m1 , the mass of naoh i don't need the volume , so ill reformulate the problem again , I need the mass of naoh with conc.15% w/v in 176 g h2so4 ok

    asked by auro
  123. Physics

    A ball starts from rest down a smooth (frictionless) 45 degree inclined plane 10 m above the floor. How fast will it be going when it reaches the floor?

    asked by Rodney
  124. science

    lena carried out an investigation to find the energy content in bacon rind she lit the bacon rind with a bunsen burner and held it beneath a test tube of water she stirred the water and recorded it temperature! why did lena stir before recording the

    asked by ellen
  125. Biology Research

    Hello, I have to analyse two research articles about how carbon dioxide affect plant growth. one of the questions I have to answer is to "compare the research approach" for the two articles. I am not completely certain what " research approach refers to"

    asked by Moi
  126. algebra

    I am confused with this. f(x) 1/4(x+9)^2+3 vertex, symmetry, and max. min. help please.

    asked by Fred
  127. Math

    The Vashi family has a 20-gallon aquarium that is only 3/4 full. The family uses a 2-quart pitcher to add water to the aquarium. How many times will the Vashis have to fill and empty the pitcher to completely refill the aquarium?

    asked by Genecis
  128. physics

    a satellite is in a circular orbit at a constant velocity around the earth. how much work is done on the satellite?

    asked by Jenn
  129. Chemistry

    Calculate the % by mass of sulphur in (NH4)2 SO4

    asked by Hunsu bidemi
  130. math

    Without calculating, comment on the statement 2 ∙ 24 ‚ 3 ∙ 23 An electrician needs 766 feet of 12-gauge wire to do a wiring job. He has 140 feet of 12-gauge wire in stock. How much more wire does he need? Decide whether or not the first number is

    asked by anonymous
  131. Physics

    A disk lying on the XY plane rinitially roates counter-clockwise with a rotational speed of w0.  After a time interval rt, the rotational speed has changed to wf moving in the clockwise direction.  The average torque during this time interval is which of

    asked by John
  132. Physics

    The constant torque required to accelerate a disk (of rotational inertia I) from rest to a speed of f rotations per second in a time interval of t is:

    asked by John
  133. Physics-Please check and I need help

    Please help set this up- A person goes into the electric field and has an object with a charge value of 4.2E-6C. At a distance of 10m from the object that's responsible for the elctric field, the person sees a force of 8.0N on the object they have. What is

    asked by Rachel Lynn C.
  134. physics

    You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift

    asked by please help!!!!
  135. Physics

    Superman is a character from the DC Comics universe with superhuman abilities. One day in the city of Metropolis you look to the skies only to see Superman passing directly over your head as he races to save Lois Lane from some imminent threat. Not in too

    asked by Ellie
  136. Geometry

    The sides of a triangle have lengths of 3, 4, and 5. Find the area of the triangle.

    asked by Tracy
  137. calculus

    if dy/dx=ycos x and y=3 when x=0, then y= ?

    asked by mark
  138. english

    im studying for test and I am supposed to write about "what are gender roles, how do they effect,, influence, inform our conceptions of masculinity and feiminity. I especially don't get the femininty and masculinity part. Thanks and I appreciate ur help!

    asked by Jessica
  139. politics

    Which president closed the tunnel between his country and palestine? The tunnel was a secret passage way in which the palestinies got food and other helpful sources.

    asked by Lily
  140. Algebra

    Hello. I am trying to solve quadratic functions but I'm having difficulty understanding. Here is my work so far... y=3x^2 + 12x + 9 12/6 = -2 = y 3(-2)^2 + 12(-2) + 9 = -3 x=0 y=9 (0,9) Would I just plug in 1 and 2 for x and then reflect it while i'm

    asked by David
  141. Math

    how does sin^2x-cos^2x =1 could someone explain or write down steps on how the left side becomes 1?

    asked by Amy
  142. Algebra

    Round 47,973 to the nearest 100 I keep thinking that it's 48,000, but I have no idea how to prove it

    asked by Jeannie
  143. social studies

    aword that describe an area that has one or feaures in common

    asked by ricardo
  144. Algebra

    8s^2-7t=0 Am I correct saying 2 real numbers?

    asked by Fred
  145. Math

    Divide and multiply. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

    asked by Justin
  146. science

    Why you think scientists probably want to leave what they do open to revision?

    asked by Edward
  147. algebra

    solve for y y^2-6y+9=25

    asked by Fred
  148. algebra

    f(x)=-x^2+2x+24

    asked by Fred
  149. Fractions-easy 5th grade

    Multiply and divide. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

    asked by Justin
  150. chem.

    the problem requires the quantity of NaOH, this is what i don't understand what does it mean by quantity , the volume , the mass ,or the molar concentration ?? I have to use all the things that are give to the exerc. including the 15 % concentration of

    asked by auro
  151. politics

    what are some famous dictators that were either removed or killed and what did they do?

    asked by Lily
  152. General

    An advertisement has the best chance for success if it: is accompanied by loud music and rapid banter. is above threshold. contains a single subliminal message. contains a grouping of words repeated below threshold.

    asked by Chloe
  153. History

    On a website I was doing research on, there is a section about the Social Revolutionary Party in Russia in the early 1900s, which has point form information on the party. "Social Revolutionary Party: -founded in 1901 -catastrophic overthrow tsardom -most

    asked by Anonymous
  154. social studies

    describe 2 details about the life of the Incas

    asked by Drew
  155. Math

    Solve 6x=x^2 - 6. Could someone give me the steps? Thanks

    asked by Shadow
  156. biology

    all test crosses are back cross. but all back crosses are not test cross. justify the statment

    asked by sabrina
  157. Algebra

    if a radius is 4x meters and its heights is 5x3 meters find its volume

    asked by Mike