Questions Asked on
November 18, 2011

  1. physics help

    A 10 g bullet moving at 370 m/s strikes a ballistic pendulum of mass 2kg. The bullet emerges with a speed of 100 m/s. What height does the pendulum rise to? I don't want the answer, i just need hints!!! thnaks

    asked by mary
  2. Math

    In a volleyball a player on one team spikes the ball over the net when the ball is 10 ft above court. The spike drives the ball downward with initial vertical velocity of -55 feet per second. Players on the opposing team must hit the ball back over the net

    asked by Lynn
  3. Physics

    A man stands on a platform that is rotating (without friction) with an angular speed of 1.21 rev/s; his arms are outstretched and he holds a brick in each hand The rotational inertia of the system consisting of the man, bricks, and platform about the

    asked by Aimee
  4. chemistry

    Consider the following reaction 4Al + 3O2 = 2Al2O3 It takes 2.00 L pure oxygen gas at STP (0C ,1atm ) to react completely with a certain aluminum. What is the mass of aluminum reacted?

    asked by NONO
  5. calculus

    an open box is to be made from a piece of metal 16 by 30 inches by cutting out squares of equal size from the corners and bending up the sides. what size should be cut out to create a box with the greatest volume? what is the maximum volume?

    asked by lulu
  6. Chemistry AP HELP!

    Tausonite, a mineral composed of Sr, O, and Ti, has the cubic unit cell and the chemical formula is SrTiO3..... Ti is coordinated by 6 O atoms, because the Ti is located at the center of the unit cell. To see the full coordination environment of the other

    asked by kali mata
  7. Chemistry

    In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Keq= [NH3]^2/[N2][H2]^3 Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N2]

    asked by Chemistry Chick
  8. Physics

    A hoop of mass M = 3 kg and radius R = 0.5 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is

    asked by Nho Neim
  9. chemistry

    CH4 + 2O2 ---> CO2 + 2H2O Delta H H2O= -285.8 kJ/mole Delta H CO2= -393.3 kJ/mole What is the standard heat of formation of methane, Delta H CH4, as calculated from the data above

    asked by kc
  10. chemistry

    A solution is prepared by dissolving 0.5842g of oxalic acid (H2C2O4) in enough water to make 100.0ml of solution. A 10.00ml aliquot (portion) of this solution is then diluted to a final volume of 250.0ml. What is the final molarity of thus prepared oxalic

    asked by NONO
  11. math

    there are 7 red balloons and 4 fewer blue ballons. use cube trains to model the set of ballons.

    asked by nancy
  12. chemistry

    calculate the mass of solid NaCl that must be added to 1.5L of 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl?

    asked by NONO
  13. chemistry

    Imagine that you have a 5.00L gas tank and a 3.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145atm , to what

    asked by unknown
  14. Physics

    A Ferris wheel with radius 11.0 m rotates at a constant rate, completing one revolution every 33.9 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.227 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction

    asked by Jacob
  15. chemistry

    The mole fraction of nitrogen in air is 0.7808. calculate the partial pressure of N2 in air when the atmospheric pressure is 760 torr?

    asked by NONO
  16. Chemistry

    Rank the following atoms in terms of decreasing atomic radius. 1. Na, N, O, Mg, F 2. F, O, N, Mg, Na 3. F, Mg, Na, O, N 4. Na, Mg, N, O, F 5. F, O, N, Na, Mg

    asked by Bob
  17. chemistry

    use oxidation states to identify the element that is being oxidized and the element that is being reduced in the redox reaction Sn + 4HNO3 ---> SnO2 + 4NO2 + 2H2O I see that SN is oxidized 0 --> 4+ and book says N is reduced +5 --> +4 I don't see that.

    asked by Monique
  18. physics

    While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.24 m piece of fishing line. The weight makes a complete circle every 0.60 s. What is the angle that the fishing line makes with the vertical?

    asked by Danielle
  19. math

    the regular price of a Zebra-FX skateboard is $180, but is on sale at a 25% discount A. How much is the discount? B. What is the sale price?

    asked by sarah
  20. US GOV

    Which of the following statements concerning the Twenty-fifth Amendment is incorrect? a. It allows the vice president to serve as acting president in the case of presidential disability. b. It allows the vice president alone to declare the president

    asked by Brooke
  21. MATH

    THANK YOU! Brenda and her family were driving to her grandmother’s house during a holiday. During the drive, Brenda fell asleep halfway through the trip. When she awoke, her family still had to travel half the distance that she had traveled while she was

    asked by To; Millie
  22. econ

    2. Suppose that firms in an industry have the following cost function: C = 100 + 0.25q2, and the industry faces an inverse demand curve of P = 90 – 2Q. a. I f the industry is competitive, find the long-run equilibrium price, quantity, and profit of a

    asked by jay
  23. physics (PLEASE READ)

    when a chameleon captures an insect its tingue car extend 16 cm in 0.10 s. (a) Find the magnitude of the tongue's acceleration, assuming it to be constant.(b) In the first 0.050 s, dones the tongue extend 8.0 cm, more than 8.0 cm, or less than 8.0 cm?

    asked by taylor
  24. Chemistry

    a real gas would behave most like an ideal gas under conditions of

    asked by tom
  25. chemistry

    calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease

    asked by saud
  26. Physics

    I just want to be sure if my answers make any sense! A kid throws a ball in the air and catches it 5 seconds later a) What is the initial velocity of the ball? No air friction. b) What is the maximum height which the ball has reached above its departure

    asked by Tommy
  27. physics

    a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend?

    asked by taylor
  28. physics( PLEASE READ)

    a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend?

    asked by taylor
  29. Physics

    Tom the cat is chasing Jerry the mouse across a table surface 1.9 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6 m/s. Where will Tom strike the floor? The ac- celeration of gravity

    asked by Emma
  30. science

    Where do subduction zones occur? What happens at them? What becomes of a subducted plate edge?

    asked by Shirley
  31. chemistry

    Consider 4.00L of a gas at 365mmHg and 20*C. If the container is compressed to 2.80L and the temperature is increased to 35*C, what is the new pressure,P2 , inside the container? Assume no change in the amount of gas inside the cylinder

    asked by unknown
  32. math

    a slide 5.4 meters long makes an angle of 29 degrees with the ground. how far above the ground is the top of the slide?

    asked by sundai
  33. Physics

    A 26.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.490 and the coefficient of kinetic friction between the table and the block is

    asked by Millie
  34. physics (PLEASE READ)

    referring to the previous problem, if you had entered the same sandy patch with a lower speed, say 7.0 m/s, would the patch have the same effect on your speed, say 7.0 m/s, would the patch have the same effect on your speed? that is, assuming the sandy

    asked by taylor
  35. american history

    In the election of 1860, the _______ won the electoral votes of all the free states, except a fraction of the New Jersey votes. A. Constitutional Union Party B. Republicans C. Democrats D. Whigs

    asked by Anonymous
  36. chemistry

    How long would it take for the concentration of the reactant to drop to one-forurth its initial value? initial concentration of reactant=0.64mol/L half-life=30s

    asked by saud
  37. English

    Rewrite the passage below correcting any errors of grammar and usage The mechanic drove out the car to Joe that was lubricated. As a matter of fact, he has not done enough on it as Joe has expected. But whatever it was he decides to take it like that. The

    asked by richard
  38. Math

    I have 6 pairs of socks lying unmatched in my dresser drawer. Each pair is a different color(brown, black, red, yellow, green, and purple). When I wake up in the morning, I randomly grab 2 of the loose socks and put them on without looking. If 2 socks are

    asked by John
  39. statistics

    If on an average, one ship out of 10 is wrecked. Find the probability that out of five ships expected to arrive the post at least four wil arrive safely.

    asked by Anonymous
  40. chemistry(reacting masses)

    When a 1 g sample of limestone was dissolved in dilute hydrochloric acid completely,0.38 g of carbon dioxide was generated.What was the percentage by mass of calcium carbonate in limestone?(Relative atomic masses : C=12, O=16,Ca=40.1)

    asked by mary
  41. English

    I am writing an essay on As I Lay Dying by William Faulkner. What are some biblical allusions in the novel?

    asked by Morgan
  42. american history

    In 1866, the Sioux Chief Red Cloud ambushed and massacred Union soldiers in an incident that would be referred to as the _______ Massacre. A. Wounded Knee B. Little Big Horn C. Chivrington D. Fetterman

    asked by Anonymous
  43. chemistry

    Balance the following redox reaction occurring in acidic solution. H+ + Cr --> H2 + Cr3+ H+ --> H2 do I add H+ to this side since H2 = 0? Also what about electrons. Cr -> Cr3+ + 3e- Hope I make sense

    asked by Monique
  44. chemistry

    To identify a diatomic gas (x2), a researcher carried out the following experiment: She weighed an empty 3.4L- bulb, then filled it with the gas at 1.20 atm and 22.0 C and weighed it again. The difference in mass was 4.7g . Identify the gas. Express your

    asked by unknown
  45. physics

    A wheel 80.0 cm in diameter accelerates uniformly from 215 rpm to 360 rpm. If in this process a point on the edge of this wheel have traveled 118 m, how long does this process take?

    asked by Alex
  46. physics

    when a chameleon captures an insect its tingue car extend 16 cm in 0.10 s. (a) Find the magnitude of the tongue's acceleration, assuming it to be constant.(b) In the first 0.050 s, dones the tongue extend 8.0 cm, more than 8.0 cm, or less than 8.0 cm?

    asked by taylor
  47. laguadia

    we are 95% confident that the mean number of weekly hours that u.s. adults use computers at home is between ?

    asked by stacy
  48. chemistry

    Fe2+ + MnO-4 --> Fe3+ + Mn2+ Fe2+ = +2 Mn = +7 O-4 = 4(-2) = -8 Fe3+ = 3+ Mn2+ = 2+ ok so next I gave 8H to MnO-4 and 4 H20 to Mn2+ Next I starting adding my electrons. 1e- to Fe3+. I understand that. This is where Im lost according to my book I give 5e-

    asked by Monique
  49. chem 121

    Iron and oxide react to form iron(lll) oxide: 4Fe(s) + 3O2(g)+ 2FeO2(s) Determine the limiting reactant in each of the following mixtures of reactants: 2.0 moles of Fe and 6.0 moles of O2

    asked by claire
  50. MLA format English

    . An article accessed through a library data base by May Gottchalk titled Reconsidering Dyslexia. The article was published in the May 24, 2002, issue of Education Matters and you retrieved the article using Wilson Select on November 22, 2003, on the

    asked by HM
  51. english

    This is a room that has no floor, no walls, no windows, and also no door. what is it?

    asked by Tracy
  52. meadowcreek

    a square fishpond has an area of 68 square feet, to the nearest thenth of a foot, what is the length of a side of the fishpond

    asked by mishell lopez
  53. physic (PLEASE READ)

    a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and

    asked by taylor
  54. economics

    # You produce shoes. Currently you produce 4 pairs of shoes at a total cost of %40. a)what is your average total cost (ATC) b)Suppose you could produce one more( fifth)pair at a marginal cost of $20. If you do produce that fifth pair of shoe, what will

    asked by gopak
  55. Physics

    Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg·m2 about its central axis, is set spinning

    asked by Emily
  56. Chemictry

    A calorimeter contains 32.0 of water at 11.5. When 1.70 of (a substance with a molar mass of 74.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 26.5. Calculate the enthalpy change, , for this reaction per mole

    asked by Priscilla
  57. financial managemnt

    3. CDL Inc. currently has a $10 million bond issue outstanding, which carries a coupon rate of 8.3% paid semi-annually, has 4 years remaining until maturity, and is priced to provide for a yield to maturity of 8.16%. The firm’s underwriter has indicated

    asked by sheldon
  58. chemistry

    calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease

    asked by saud
  59. Chemistry

    if the initial concentration of the reactant in the first order reaction A→products is 0.64 mol/L and the half-life is 30 s, calculate the concentration of reactant 120 s after initiation of the reaction

    asked by saud
  60. algebra

    1. Jodie biycles 5km/h faster than Predup. In the same time it takes Predup to bicycle 60km, Jodie can bicycle 75km. How fast does each bicyclist travel? 2.The officejet printer can copy Janet's dissertation in 20min. The LaserJet printer can copy the same

    asked by lisa
  61. physics

    The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion she drops a bottle. The hero quickly straps on the bungee cord to his leg and dives straight down to grab the bottle while its

    asked by Jack
  62. English

    I urgently need you to check these sentences. Thank you. 1) As our students we'll probably have to learn science in English in their last year of high school, we would rather they used English as the lingua franca for their Comenius project. 2) I think

    asked by Henry2
  63. psychology

    Can someone please help me with this psychology question asap? Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!

    asked by Marilyn
  64. US Gov

    The greatest source of presidential power is: a. the power to remove members of Congress from office for violating their oath of office. b. the power of referendum. c. politics and public opinion. d. the threat of a veto. e. the power to make political

    asked by Brooke
  65. econ

    12. A monopolist faces a constant marginal cost of $1 per unit. If at the price he is charging, the price elasticity of demand for the monopolist’s output is –0.5, then

    asked by jay
  66. physics

    A block is released on an inclined plane from a height of 1m. There is friction (static and kinetic =.4) and the mass of the block is 5 kg, the mass of the pulley is 1 kg and it has a radius of 5 cm. The slope of the incline is 30 degrees. Find the

    asked by Rachael
  67. physics

    a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and

    asked by taylor
  68. My First Quarter Grades (PLEASE READ!!!!)

    What is my grades for the first quarter? I didn't get my report card because my parents didn't go to the parents teacher conference so yeah but today my guides counselor show it to me (my grades for the first quarter) they didn't calculated my average.

    asked by Laruen
  69. finding math

    find the decimal notation for the fracton 3/10

    asked by June
  70. Free Enterprise

    why might it be a plus for a company to have such a high share price that trading in its stock is discouraged?

    asked by CP
  71. physical science

    A 1200-kg car reaches a speed of 11 m/s from rest in 10 seconds. Determine the cars power.

    asked by Mish
  72. math

    prove these identies sin^2+tan^2=sec^2-cos^2 sin^2 sec^2 +sin^2=tan^2+sin^2

    asked by melissa
  73. world history

    What strategy did Buddhist and Christian missionaries employ to spread their faith that Muslims didn't? A. Forceful conversion of others B. Conversion of merchants C. Use of artifacts D. Conversion of kings and other elite figures im 70% sure it's D what

    asked by firedup
  74. Math Help

    -9-(-1) please help me solve with explanation

    asked by Rocky
  75. chemistry

    Write a balanced net ionic equation for the following reactions in acid soln Hydrogen Peroxide reacts w/an aqueos soln of sodium hypochlorite to form oxygen and chlorine gas

    asked by anonymous
  76. psychology

    Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!

    asked by Marilyn
  77. american history

    The Wade-Davis Bill passed by Congress, then vetoed by Lincoln, stipulated that _______ percent of voters in a Confederate state must take an oath of future loyalty to the Union before a process of restoration could begin. A. 10 B. 70 C. 20 D. 50 i thinkit

    asked by Anonymous
  78. English

    I urgently need you to revise these sentences. 1) Do you intend to start the project before Christmas? 2) I need to know which and how many students you are going to involve. 3) What do you think of our proposal of including 20 students from year 11? 4) I

    asked by Henry2
  79. algebra

    how do you do this problem? perform indicated operation write answer as a fraction, simplify. 1/11+ 5/6

    asked by melinda
  80. math

    What is the minimum diameter of a round stock necessary to make a square key 5 inches to each side?

    asked by j2j
  81. algebra

    1. Find the LCM of (8+7), (64-49v^2), and (8-7v) 2. Find the LCM of 14x^7 and 98x^5 3. Find all numbers for which the rational expression is undefined 5/v-9

    asked by lisa
  82. Math

    Suppose R is the relation on N where aRb means that a ends in the same digit in which b ends. Determine whether R is an equivalence relation on N. And, Suppose that R and S are equivalence relations on a set A. Prove that the R ¿ S is also an

    asked by Martin
  83. physics

    A rotating uniform cylindrical platform of mass 240 kg and radius 5.7 m slows down from 3.9 rev/s to rest in 16 s when the driving motor is disconnected.

    asked by Ari
  84. physics

    referring to the previous problem, if you had entered the same sandy patch with a lower speed, say 7.0 m/s, would the patch have the same effect on your speed, say 7.0 m/s, would the patch have the same effect on your speed? that is, assuming the sandy

    asked by taylor
  85. Science 9

    Please help, i really don't understand what this question means, in what s Videos Maps News Gmail More Stephanie Chu order are ions named in an ionic compound: negative ion followed by positive ion or postive followed by negative. Please no links, i

    asked by Stephanie
  86. Alg. II/Trig

    If m and n are real numbers, i^2=-1, and (m-n)-4i=7+ni, what is the value of m?

    asked by Lily
  87. world history

    What strategy did Buddhist and Christian missionaries employ to spread their faith that Muslims didn't? A. Forceful conversion of others B. Conversion of merchants C. Use of artifacts D. Conversion of kings and other elite figures im 70% sure it's D what

    asked by firedup
  88. RES/342

    Suppose you devised a training program to raise student scores on a standardized test, such as ACT, or AIMS (like in Arizona). You first administer the test to a random sample of students, record their scores, administer the training to these students, and

    asked by Hamilton
  89. economics

    Explain how output per capita can grow faster than labor productivity. Is it possible for labor productivity to grow faster than output per capita?

    asked by payal
  90. geometry

    B is the midpoint of and D is the midpoint of . Solve for x, given BD = 3x + 5 and AE = 4x + 20.

    asked by Anonymous
  91. college algebra... LOG

    log4(little 4) 8 how do i write this in y=?

    asked by brianna
  92. English

    I may write this. I need to know if you both agree to include students from years 10/11.

    asked by Henry2
  93. Physical Chemistry

    Derive an expression for number of electrons N(E) with energy that can escape from a metal in terms of Z(E) (density of state) and F(E) (Fermi-dirac function) and ф (work function).

    asked by John
  94. Res/342

    Suppose you devised a training program to raise student scores on a standardized test, such as ACT, or AIMS (like in Arizona). You first administer the test to a random sample of students, record their scores, administer the training to these students, and

    asked by Hamilton
  95. Math

    The relation R on {1,2,3,...} where aRb means a/b for reflexive, symmetric, antisymmetric or transitive in the binary family. Also, the relation R on the set of all pepole where aRB means that a is at least as tall as b. Where is the releation R on N where

    asked by Adam
  96. English

    I still have a few more doubts. 1) Thank you for being so quick in answering my letter. 2) I wish you all a nice weekend and I look forward to receiving your email. (Can you help me express these two concepts). 3) Could you start a question with "in

    asked by Henry2
  97. physics

    When a 19.9 kg wheel with an angular speed of 3.10 rad/s is disconnected from a motor, a 0.124 N · m frictional torque slows the wheel to a stop. If the wheel has radius of 0.71 m, how long will it take for the wheel to come to rest after being

    asked by Alex
  98. Psychology

    Sarah has noticed at work that office meetings held in the late morning go more quickly than those scheduled after lunch. She tells her boss she'll bet that, if he holds his meetings at 11a.m., the group will spend more time on the agenda and less

    asked by Amy
  99. Physics

    #4. Rain is falling at a velocity of 10,0 m/s at an angle of 30* towards the west. At what velocity and direction does a marathon runner have to go in order for him to get rain on his head?

    asked by Jim
  100. Learning Math

    Please solve 9x+x

    asked by June
  101. Spanish

    I would just like to know if these sentences are grammatically sound. Esta es la receta para empanadas de pera de Chile. Estos son los ingredientes: Dos tazas de peras secas Dos tazas de agua Tres cuartos tazas de azucar Una cucharilla de canela Una

    asked by Mishaka
  102. Learning Math

    why is it when 9x+x= 10x are we adding the x? Please help me to understand

    asked by June
  103. Math prediction

    how to add the following -94+(-19)

    asked by June
  104. Math

    What the base b1 of an Isosceles trapezoid if b2=57ft,h=17ft6inches and both legs are 23ft? or the formula for the solution?thank you.

    asked by Jason
  105. chemistry

    why is NO equal to nitrogen oxide isn't the charge of N ion +3?

    asked by anonymous
  106. math

    the ratio of cube to sphere in a geometry box is 16 to 9. If there are 225 cubes and spheres in the geometry box altogether. Then how many cube are there?

    asked by dashawn
  107. economics

    How do “rules of the game” affect productivity and growth? What types of “rules” should a government set to encourage growth?

    asked by payal
  108. social studies

    what are the main assumptions underlying organizational communication?

    asked by Edwin
  109. Social studies

    What were the causes of the French and Indian war?

    asked by Lauryn
  110. statistics

    can you place 44 coins in 10 containers and have them distributed evenly

    asked by charlie
  111. Science

    I said D for the following question but I got it wrong, I know it's not B though because the disease isn't sex-linked and not C because people who get the disease are usually older (50's). Would the Answer be A then? Even though it's deadly the

    asked by Jon
  112. algerbra

    7y=5x, for y

    asked by Connie
  113. UNIVERSITY OF EDUCATION,WINNEBA

    How would one use the elements of the marketing mix to advise a hairdresser?

    asked by DAVID
  114. american history

    A series of legislative acts passed under the Grant administration in 1870 and 1871 authorized federal protection for black suffrage through the use of the Army against the Ku Klux Klan. Together, these were known as the _______ Acts. A. Reconciliation B.

    asked by Anonymous
  115. physics

    4. The physics class is having a tug of war – the men against the women. For a long time the two teams are pulling with equal force and the knot in the centre of the rope isn’t going anywhere. But then one boy sneezes and stops pulling as hard for just

    asked by aishah
  116. Chemistry

    An oil whose density is 0.775g/mL was used in a open-end manometer to measure the pressure of a gas in a flask, as shown in figure (b). If the height of the oil column is 7.68cm and Pbar = 760.0mmHg. What is the pressure of the gas in the flask in mmHg?

    asked by Chris
  117. math

    The area is 17m2. iT HAS TO BE A SQUARE. WHAT IS THE PERIMETER

    asked by Dylan Hughes
  118. math--i just need help getting started--PLEASE!

    Let W be the set of all continuous functions from the set of real numbers R to R. For f,g in W define f+g by (f+g)(x)=f(x)+g(x) and (f*g)(x)= f(x)g(x). Verify that W is a commutative ring. Does W have unity? Why or why not?

    asked by Mary
  119. Physics

    A ball of mass 5.3 kg and radius 8 cm rolls without slipping horizontally at 4.3 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring if the spring constant k=41100N/m? (Assume the floor is frictionless)

    asked by Jacob
  120. Physicss

    A guy playing basket-ball needs to make the penalty shot for his team to win. Given that the ball is thrown from a height of 2 meters at an angle of 60 degrees, that the post is situated at a distance of 7 m and standing at 3.5 m: a) What does the initial

    asked by Brian
  121. math

    find the solution of (x2-y2)dx + 3xydy =0 Please help me to find the right answer,I sovled many ways but I don't get the right one with answer key. Thank you so much in advance

    asked by lyn
  122. math

    you have a 20 x 20 area and you have 4 14 foot fences plus 4 4 foot fences and you need to house 9 dogs and none can be together how do you do it?

    asked by heidi
  123. Psychology Please Help!!

    One of the arguments against inherited racial differences in intelligence is based on data that shows: a. a college education reduces the gap between the IQ scores of white and black races. b. nutrition reduces the gap. c. scores for black test takers

    asked by Anonymous
  124. 4th grade

    75-3m when m=8. Thanks!

    asked by Dominique
  125. Science

    What are the equivalents of K, 0°C, and 0°F in the other temperature scales?

    asked by Shirley
  126. Math

    Find the discriminant of the quadratic equation and give the number and type of solutions of the equation. s^2√5 + s + √5 = 0 I'm confused because of the radical...

    asked by Linda
  127. Language Arts

    I have a big packet of homework can somebdy help me?1,000 qstn. :(

    asked by Yessica
  128. FLUID MECHANICS

    An inclined triangular plate is held in water with the base at the surface.Base=4m an height=6m.The inclination of the plate to the horizontal is 60.Find the resultant force and the center of pressure.

    asked by michael
  129. physics

    Resultant force=203.89KN

    asked by michaeL
  130. math

    what is the volume of a rectangular prism with a height of 481 ft and length 756 ft?

    asked by Adetola
  131. Learning

    -9-(-1)

    asked by Rocky
  132. business

    define a supply chain driver and show it's relation to supply chain focus with a couple of examples

    asked by Edwin
  133. practical exercise

    The Holland Flower Book illustrates

    asked by Anonymous
  134. Math

    Ms. SUE, Is this correct? 4. 5/8 + 5/6 = 1 11/24 5. 13 1/2 + 7 2/3 = 21 1/6

    asked by Brad
  135. chemistry

    How does the N in NO2 have a oxidation state of 4+ please explain

    asked by Monique
  136. science

    Why are most fossils found in beds that were once the floors of shallow seas?

    asked by Shirley
  137. amercian history

    If you were a reform-minded person who, above all, loathed the social problems associated with alcohol, you would have been especially sympathetic to the A. WCTU. B. Mugwumps. C. Comstock Law. D. evangelical efforts of Dwight L. Moody. I think it is a is

    asked by Anonymous
  138. psychology

    I need help with this! A recent controversy in the media surrounded the complaints of serious physical symptoms in veterans returning from the 1991 Gulf War. Allegations that the physical symptoms were due to exposure to chemical or biological agents could

    asked by Marilyn
  139. RES/342

    A political action committee decided to poll its membership to determine if they were in favor of a certain potential law, similar to gun control. The results that came back were 125 in favor of the law, and 120 against. Given that the crew at the center

    asked by Hamilton
  140. Literature

    Can you please help me understand the poem "I many times thought Peace had come"?

    asked by Anonymous
  141. Math

    What is the antisymmetric relations on the set {0,1}?

    asked by Eddie
  142. Math

    Construct R3, S2 and S º 3, by supposing R and S are relations on {a,b,c,d), where R={(a,b),(a,d),(b,c),(c,c),(d,a)} and S = {(a,c), (b,d)(d,a)}.

    asked by Nat
  143. Math

    What are the partitions of {1,2,3,...10}?

    asked by Adam
  144. Math

    Use elements in the order given to determine rows and columns of the matrix. R on {1,2,3,4} where aRb means |a-b|

    asked by Tony
  145. chemistry

    What volume of ammonia at 7.0 atm and 235C would you get from 333g of nitrogen reactin with enough mass of hydrogen?k calculate the density of hydrogen at STP?

    asked by NONO
  146. Genetics

    1) For each of the following partial diploids, give the cellular phenotypes for A and B. Explain. A B a. for a negatively regulated gene: F’pR- poA-B/ pR po-AB- F’p-R p-oA-B/ pR- poAB- b. for a positively regulated gene: F’pR- poA-B/ pR po-AB-

    asked by Tommy
  147. Physics

    Find the angle that the vector R = A + B makes with the positive x axis, use counter- clockwise as the positive angular direction, between the limits of −180 degrees and +180 degrees. Answer in units of degrees

    asked by Shana
  148. Psychology Please Help!!!!

    As Marcia took her place in the classroom on her first day of class, a familiar feeling surged inside of her. She found herself "scoping out the competition," considering topics for the "best in class" paper, and listening for an opportunity to add to

    asked by Anonymous
  149. Calculus AB

    Find a, b, c, and d such that the cubic function ax^3 + bx^2 + cx + d satisfies the given conditions Relative maximum: (2,4) Relative minimum: (4,2) Inflection point: (3,3) So this is what I have so far: f'(x) = 3a^2 + 2bx + c f''(x) = 6ax + 2b f(2) = a(8)

    asked by Savannah
  150. math

    please solve 5.68-(-4)

    asked by cree