Questions Asked on
April 7, 2015

  1. Trigonometry

    a bicycle with 24inch diameter wheels is traveling at 15mi/hr. a) Find the angular speed of the wheels in rad/min. b)How many revolutions per minute do the wheels make?

    asked by Dan
  2. Math I need help ASAP!

    1) Identify the function rule shown in the table. Function Table n - 3, 4, 5, 6 y - 2, 1, 0, -1 a. y = 2 + n b. y = 5n c. y = 5 - n d. not enough information ** 2) What is the values of the function y = -2x - 4 for x = 0,1,2 and 3? a. 0, -6, -8, -10 b. -4,

    asked by Talea
  3. check my answers please

    "President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush

    asked by Amber

    7. Suppose you earn $10 each hour you babysit. Which function describes the relationship between your total earnings E and the number of hours you babysit, h? (1 point) E(h) = 10h E(h) = h + 10 E(h) = h – 10 h = 10E

    asked by HIHELP
  5. English

    Which of the following is a good rule to follow when proofreading an essay? A. Scan the essay twice, once for organization and once for surface errors. B. Ask your best friend to critique your essay. C. Use the computer's spell-check and grammar-check

    asked by Lauren
  6. physics

    Anna applies a force of 19.5 newtons to push a book placed on a table. If the normal force of the book is 51.7 newtons, what is the coefficient of kinetic friction? A) .01 B) .20 C) .38 D) .48

    asked by alexis
  7. English

    Which of the following sentences contains an error in subject-verb agreement? A. Either Dennis or Susan is going to pick you up. B. Each of the 14 groups are going to contribute an item to the auction. C. Kristy, Molly, and Kate attend the same university

    asked by Lauren
  8. engineering science n3

    A train with a mass of 120Mg accelerates uniformly on a horizontal track.the resistance to movement is 5N per KN of the mass of the train. The force in the draw-bar of the locomotive is 80KN.calculate: 1.the force required for the constant speed. 2.the

    asked by tuis
  9. Science

    How much current does a flashlight use if its battery supplies 3.0 Volt and the bulb has a resistance of 4.0 Alpha

    asked by Kyle
  10. Chemistry

    At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this

    asked by Marissa
  11. science.......

    1.a ball with a mass 2kg rests on an incline with an angle of 10 degrees. The ball is released to roll down the incline plane neglecting all friction: Determine the following: A.the loss in potential energy after it has rolled 12m. B. The kinetic energy

    asked by Buhle
  12. Chemistry

    Calculate the molarity (M) of the following solutions: 4.00moles of glucose in 3.00L of glucose solution 5.50g of KOH in 4.00L of KOH solution 5.85g of NaCl in 400.mL of NaCl solution

    asked by Chan
  13. physics

    A train with a mass of 120Mg accelerates uniformly on a horizontal track.The resistance to movement is 5N per KN of the mass of the train.the force in the draw bar of locomotive is 80KN..calculate:1force reqqured for constant speed. 2.the force that causes

    asked by mashao
  14. math

    During the summer holidays,your brother earns extra money mowing lawns.He mows 6 lawns an hour and has 21 lawns to mow.How long will it take him?

    asked by samuel
  15. English

    Select correct if sentence does not need any comma's and incorrect if the sentence does need a comma. 1.We were tempted to drink out of that clean cold stream Correct***** incorrect 2.How do motorcycles trail bikes and mopeds differ? Correct

    asked by Cassie
  16. social studies

    1) How did Muslim Turks influence Turkey's development? 2) What is likely to happen in the political and economic future of Cyprus? 3) How are the viewpoints of Turkey's urban and rural population likely to differ regarding the role of women in society?

    asked by Aaliyah
  17. math

    A worker uses 4 gray tiles for every 5 blue tiles that he uses.(a) If he uses 60 gray tiles, how many blue tiles does he use? (b) If he uses 540 tiles altogether, how many gray tiles does he use?

    asked by symira
  18. Science

    1. What do bone marrow (the soft connective tissue that fills the internal spaces in bone) and the dermis (layer of the skin under the epidermis and over the hypodermis) have in common? (1 point) • They are both sites of new cell formation. • They both

    asked by Kiara
  19. Math

    A multiple-choice question has five possible answers. What are the odds in favor of guessing the right answer? A.2:3 B.4:1 C.1:4 D.3:2 Is the answer C? Thank you

    asked by Kanani
  20. Chemistry

    An aqueous solution of 0.25 M silver nitrate, AgNO3, and 0.25 M iron(II) nitrate, Fe(NO3)2, are allowed to come to equilibrium in the following chemical reaction: Ag+(aq) + Fe2+(aq) Fe3 + (aq) + Ag(s) If the equilibrium constant, Kc, for the reaction is

    asked by Cortney
  21. Chemistry

    A coffee cup calorimeter contains 100.0 g of water at 10.0 ◦C. A 72.4 g sample of iron is heated to 100 ◦C and dropped into the calorimeter. Assuming there is no heat lost to the coffee cup, calculate the final temperature of the system. The specific

    asked by kika
  22. math

    Juanita Finn deposits $12,000 into an account at Valley Bank that pays 8% interest compounded quarterly. At the end of 5 years, how much will Juanita have in her account? Round to the nearest cent.

    asked by ashley
  23. Calculus

    A wire 7 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total

    asked by Nope
  24. Social studies

    1.What was the most important factor leading to the end of the Cold War? a)The European Economic Community formed b)Democratic revolutions began in Eastern Europe c)The Marshall Plan helped rebuild Western Europe d)a U.S.-soviet peace treaty helped repair

    asked by #HOMEWORK
  25. math

    the perimeter of a rectangle is 35.54 inches longer than the perimeter of a square of side 6.75 inches. Find the perimeter of the rectangle to the nearest tenth of an inch.

    asked by melissa
  26. Physics

    The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground

    asked by Kristyn
  27. physics

    A flywheel rotates at a constant angular acceleration. At time t = 1.38 s, it rotates with a speed of ω = 2.40 rad/s in the clockwise direction. At time t = 5.97 s, it rotates with a speed of ω = 2.40 rad/s in the counter-clockwise direction. What is its

    asked by winged17
  28. chemistry

    What must be true for a substance to dissolve in water? A. The entropy term must be positive. B. The enthalpy and entropy terms must combine for a favored reaction. C. The free energy change of dissolving must be positive. D. The energy required to break

    asked by Cortney
  29. Algebra

    Glen created a mural on a rectangular sheet of paper with a width of √18 feet and a length of √24. A. Find the exact area of the mural, in simplified form. When Glen’s mural was unveiled, the school made a smaller version of the mural to advertise

    asked by Emily
  30. Physics

    Question: A car goes down a ramp, and once it hits the floor it must travel 6 metres and then stop. Create the procedure in order to find the angle that the board must be to make this scenerio possible. You cannot test on both the floor and the board at

    asked by Wren
  31. Chemistry

    C18H32O2 + 2H2 - C18H3602; oxidized or reduced?

    asked by Maria
  32. math

    a man uses 1/3 of his land for growing mangoes,!/4 for bananas ,3/8 for apples ,and the remaining 18 hectares for oranges , so find how much land does the man have ?and find how much land does he use for growing apples ?

    asked by Anonymous
  33. English

    Based on your reading of “On Making an Agreeable Marriage” and A Vindication of the Rights of Women, what can you conclude about women’s education at the time these pieces were written? A. Women were mainly taught practical skills useful in running a

    asked by Emi
  34. Math

    Determine the coefficient of w x^3 y^2 z^2 in (2w−x+y−2z)^8. Thanks.

    asked by Anonymous
  35. math

    an oatmeal cookie recipe that makes 24 cookies requires 1 cup of sugar if alex needs 30 cookies how many cups of sugar should she use

    asked by ashley
  36. Language arts help

    In the following sentence, what word does the participial phrase modify? Everyone in the annex heard her screaming loudly. A. Everyone B. annex C. heard D. her Is the answer C? Thank you on advance

    asked by Anonymous
  37. math

    1. When 100 students took a test, the average score was 77,1. Two more students took the test, the sum of the score was 125. What is the new average ? 2. The Basket Ball Team and Baseball team have a total of 24 players. There are 12 basket players and 18

    asked by Iman
  38. Physics!

    An ammeter indicates the current for a toaster is 5.0 amps when the toaster is connected to 120-V circuit. How much energy is given off by the toaster in 42.0 seconds? Show all calculations leading to an answer.

    asked by Ciara
  39. Chemistry

    If you need to produce 355 grams of oxygen gas (O2) in the electrolysis reaction of water by an electric current. If the reaction is run at 125 degrees Celsius in a reactor volume 22500ml. What is the pressure of the produced oxygen in mm Hg?

    asked by Emily
  40. Physics

    A rescue helicopter is lifting a man (weight = 868 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 1.83 m/s2? (b) What is the tension during the remainder

    asked by Kristyn
  41. Physics

    A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 530 N. As the drawing shows, she is closer to the left cliff than to the right cliff, with the result that the tensions in the left and right sides of

    asked by Kristyn
  42. Physics

    During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 246 N on the wire. The left section of the wire makes an angle of 14.2°

    asked by Kristyn

    A spring gun, held horizontally 1.70 m above the ground, fires a 0.010 kg marble so that it lands a horizontal distance of 7.60 m away. If the gun is pointed straight up, and the same marble is fired, how high (in meters) will it rise? I tried using

    asked by Beckles
  44. Chemistry

    If you have 225 grams of Ca3(PO4)2, and 185g H3PO4; calculate which is the limiting reagent, which the XS reagent, and how much product you will produce from the limiting reagent (in grams) Ca(PO4)2 + 4H3PO4 = 3Ca(H2PO4)2

    asked by Emily
  45. math

    what is he interior points and doundary points of empty set?

    asked by meher nigar
  46. English

    1. I ate little food on my lunch plate. 2. I ate a little food on my lunch plate. 3. I ate less food than Bill. 4. Bill ate more food than me. 5. I ate the least food in my class. 6. I ate the least food of all my classmates. 7. I ate the least food of all

    asked by rfvv
  47. math

    a spinner is divided into 10 sectors. the number 1 through5 are each placed in two different sectors. find the probability of each event. P(less than 3) P (5) p (8)

    asked by gayle
  48. Math

    Jamal found 1/3 gallon of milk in the kitchen. He poured it into 5 equal size cups. What fraction of a gallon of milk is in each cup? 1/3 of 5 3 x 5 = 15 1/15

    asked by AC
  49. HELPP

    The volume of a rectangular prism can be computed using the formula V = lwh. What is the width of a prism that has a volume of 1664 cubic centimeters, a length of 16 centimeters, and a height of 8 centimeters? A. 11 cm B. 13 cm C. 26 cm D. 768 cm

    asked by Matt
  50. grammar

    Though no vote ____taken, each delegate and alternate _____there. a.was, was b.was, were c.were, was d.were, were I chose a, because I think that each before delegate makes it singular. But I also think that and between delegate and alternate might mean it

    asked by Carrie
  51. Chemistry

    Determine the volume, in milliliters, required to prepare each of the following diluted solutions. 40.0mL of a 2.75M KNO3 solution using a 1.00M KNO3 solution 45.0mL of a 2.90M H2SO4 solution using a 6.00M H2SO4 solution 0.700L of a 2.10M NH4Cl solution

    asked by Chan
  52. math

    In constructing a graph that compares average water usage per household in different communities, you choose to use cubes of different sizes. If the cubes are drawn so that their volumes are proportional to the volumes of water usage in different

    asked by heem
  53. Math

    You are working as an assistant to a chef. The chef has 6 cups of berries and will use 2/3 cup of berries for each dessert he makes. How many desserts can he make? Where do I start to solve this problem?

    asked by Jay
  54. Math

    the Ruby Snow Company makes custom snowboards. the company's profit can be modelled with the relation y=6x^2+42x-60,where x is the number snowboards sold(in thousands) and y is the profit (in hundreds of thousands of dollars) How many snowboards does the

    asked by Anonymous
  55. Chemistry

    Calculate the average C—C bond strength in cyclopropane (in kJ/mol). Its combustion and the experimental enthalpy of reaction are: C3H6(g) + 4.5O2(g) → 3CO2(g) + 3H2O(g) ΔHºrxn = -1,957.7 kJ/mol Since all reactants and products are in the gaseous

    asked by JUNDY
  56. Chemistry

    Calculate the vapor pressure of Hg at 14 oC (in atm). Hg(l) ↔ Hg(g) . . . ΔHo = 61.32 kJ and ΔSo = 98.83 J/K

    asked by JUNDY
  57. math

    A 2-inch length in the scale at the left represent an actual length of 20 ft. What is the scale of the drawing?

    asked by elijah
  58. Chemistry

    What are the correct and accurate products for the following ion combination reaction? Then write the ionic form of the reaction and the net ionic form of the reaction. K2CO3 + CaCl2 ->

    asked by Emily
  59. algebra


    asked by RICK
  60. Math

    There are 35 marbels in a bag: 9 blue marbels, 8 green marbels, 4 red marbels, 8 white marbels, and 6 yellow marbels. Find P(red). Write the probability as a fraction in simplest form, a decimal, and a percent. A. 4\31,0.129,12.9% B. 4\35,0.114,11.4% C.

    asked by Kanani
  61. cheminstry

    A sample of neon gas has an initial volume of 2.5L at 300 K. What is the new temperature of the gas(both in K and Celsius degrees) if the pressure remains constant, when the volume is changed to each of the following values: a. 5.00L b. 7.50L c. 1.50L d.

    asked by marielis
  62. english

    1.Antigone decides to bury her brother in defiance of the law. Her sister argues against it. Summarize the two sides of the argument, and explain Antigone's reasons for doing as she does. 2.Creon says that it would be wrong for him to listen to the

    asked by Julissa
  63. social studies

    how was the northern renaissance simaler to the italian renaissance? how was it differ?

    asked by #HOMEWORK
  64. Chemistry

    In a 25.8 liter vessel of nitrogen gas that is heated from 10 degrees Celsius to 110 degrees Celsius to reach a final pressure of 17450 mm Hg; how many grams of N2 do you have in the vessel?

    asked by Emily
  65. Chemistry

    If you have a 1255ml of a 10.55 M solution of HCl and you need to dilute the solution to 1.555 M solution; How much solvent must you add?

    asked by Emily
  66. math


    asked by Vicky
  67. Art

    Drawing: girl in a southern German folk costume it's the first picture in Google search. How did the designer of the German folk dress use the principles of art? A. The designer repeats colors throughout the apron to create unity. B. The designer uses

    asked by Kanani
  68. Applied Chemistry - HELP!

    Make a poster of types of product warning labels. I'm having a hard time looking up types of product warning labels. Please help and please do not just give me Google link to product label for me to look up by myself which I did but I .... having a hard

    asked by Sam
  69. Math

    A number cube with the numbers 1 through 6 is rolled. Find P ( number is greater than or equal to 3). A.4\6 B.1\6 C.2\6 D.5\6 Is the answer A? Thank you

    asked by Kanani
  70. Philosophy

    Is there objectivity in ethics, or is ethics simply a matter of social convention? Does the wrongness of some acts - such as genocide, torture, terrorism, murder - transcend social convention?

    asked by TayB
  71. Physics

    On a frictionless air hockey table, a puck of mass 5.0 kg moving at 2:0m=s approaches an identical puck that is stationary. After collision, the rst puck moves at 30 degrees above the original line of motion; the second puck moves 60 degrees below. (a)

    asked by winged17
  72. math

    Aubrey has a shelf full of books. • Exactly 1 }3 of the books on the shelf are mysteries. • Aubrey has read 10 of the mysteries on the shelf. • The number of mysteries Aubrey has read is greater than 1 }5 of the number of mysteries on the shelf and

    asked by Lakshmi
  73. math

    The gardener went to the market to buy 100 animals for a total of IDR 1.000.000. If the price of cow IDR. 50,000 /cow and goat IDR 10,000 /goat , rabbit IDR 5000 /rabbit , how many of each kind of animal which can he buy ? I wrote : Cow = X = 50.000 Goat =

    asked by Iman
  74. Physics

    A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 131 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 59.9 kg,

    asked by Kristyn
  75. math

    In a car repair shop there are 50 cars to be repaired . It is estimated that 23 of that cars need new brakes , and 34 of that cars need to repair the exhaust system . a. How many cars are in need of repair at least two? b . What most cars that are not in

    asked by Iman
  76. Physics

    The alarm at a fire station rings and a 98.5-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 4.00 m). Just before landing, his speed is 1.81 m/s. What is the magnitude of the kinetic frictional force exerted on the

    asked by Kristyn

    A person is flying a model airplane with mass 82.2 gram in a horizontal circular path on the end of a string 10.5 m long. The string is horizontal and exerts a force of 3.22 N on the hand of the person holding it. What is the speed (in m/s) of the plane?

    asked by baz
  78. Physics

    A student is skateboarding down a ramp that is 6.03 m long and inclined at 21.5° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.87 m/s. Neglect friction and find the speed at the bottom of the ramp.

    asked by Kristyn

    Tarzan (m = 78.4 kg) tries to cross a river by swinging from a vine. The vine is 10 m long. Tarzan doesn't know that the vine has a breaking strength of 1045 N. What maximum speed (in m/s) can Tarzan have at the bottom of the swing (as he just clears the

    asked by baz

    An airplane is flying in a horizontal circle at a speed of 117 m/s. The pilot does not want his centrifugal acceleration to exceed 6.8g (that is, to be more than 6.8 times the acceleration of gravity). What is the minimum radius (in meters) of the circular

    asked by baz
  81. Astronomy

    Why will detecting Earth-sized planets be much more difficult than finding Jupiter-sized planets around other stars?

    asked by San Mateo College
  82. chemistry

    If you start with 146 g of water at 47◦C, how much heat must you add to convert all the liquid into vapor at 100◦C? Assume no heat is lost to the surroundings. Answer in units of kJ.

    asked by kika
  83. math

    A man has been through 24 phases traveling in a motorcycle rally and finish as much as 37.7 % of the way to be traversed . How many phases that must be gone through to complete the 58 % ?

    asked by Iman
  84. Physics

    The drawing shows a circus clown who weighs 750 N. The coefficient of static friction between the clown’s feet and the ground is 0.630. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the

    asked by Kristyn
  85. math

    A television is sold at a discount of 13 % for IDR. 870,000. What is the actual price of the television before at a discount ? COnfuse..

    asked by Iman
  86. math

    Mr. Kardi have 5 trucks of sand . The charge then A and B are 2.5 ton , trucks C and D 3 ton , 1 ton truck E load over charge - average. How many tons of cargo trucks E ?

    asked by Iman
  87. math

    In a contest , 2 participants were asked about their age . To test the strength of their math , they are asked to add their ages together. One answer 44 and the other gives 1280. The first obtained from the parse age with one another , while the second can

    asked by Iman
  88. math

    Janet has 4 }9 gallon of paint. She uses 1 }8 of the paint she has to cover 3 canvases. She uses the same amount of paint to cover each canvas. What amount of paint does Janet use to cover each canvas?

    asked by Lakshmi
  89. algebra


    asked by RICK
  90. Physics !

    Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenarios below indicate what changes (if any) take place A. Total resistance of the circuit B. Total current of the circuit C. Power

    asked by Ciara
  91. algebra/116

    Which set of points are on the line y=6x-6 1.{(0,-6),(12,3)} 2.{(0,-6),(3,12)} 3.{(-6,0),(12,3)} 4.{(6,0),(3,12)}

    asked by Libby
  92. geometry


    asked by chloe
  93. finite math

    Find the amount of an ordinary annuity for 5 years of quarterly payments of $2,200 that earn interest at 4% per year compounded quarterly.

    asked by Sarah
  94. ALGEBRA /116

    Solve the inequality -5x/7-2>-1 1.x4.2 3.x-1.4

    asked by Libby
  95. English

    What does the bride learn in “Woo’d and Married and A’ ”? A. Marrying a man who loves her is enough. B. Having a house of her own is the most important thing in life. C. If she and her husband work hard, they will eventually be rich. My choice is A

    asked by Emi
  96. Math

    A 12 foot-high pole casts a 9 foot long shadow, at the same time of day, what would be the length of a shadow cast by a 45 foot-long tree

    asked by Taylor
  97. Physics

    A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 131 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 59.9 kg,

    asked by KS
  98. math

    Five friends picked 7 pounds of apples. They will share the apples equally. How much will each get?

    asked by john
  99. Language Arts

    Which sentence contains a participle phrase? A. She wanted to spend time writing B. Her job is giving the attic dwellers their food C. Quickly snatching up the coat, she ran to her room? D. To get along well requires cooperation. Is the answer A? Thank you

    asked by Kanani
  100. math

    If it says use the method of substitution to solve the system of linear equations 3a=6-b 3a=4-b How do i find the solution

    asked by Rashad
  101. Grambling

    A jetliner, traveling northward, is landing with a speed of 83.8 m/s. Once the jet touches down, it has 750 m of runway in which to reduce its speed to 11.4 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take

    asked by Sandra
  102. Grambling

    Displacement vector points due east and has a magnitude of 4.58 km. Displacement vector points due north and has a magnitude of 6.25 km. Displacement vector points due west and has a magnitude of 8.65 km. Displacement vector points due south and has a

    asked by Sandra
  103. science

    A mixture of zinc and anhydrous zinc nitrate was heated in air, and its mass has not changed after this procedure. Calculate the mass frac-tions of the components in the mixture.

    asked by odwa nkqwiliso
  104. Physics

    A motorcycle has a constant acceleration of 2.65 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its speed from (a) 41.5 to 51.5 m/s, and (b) 71.5 to 81.5 m/s?

    asked by Sandra
  105. accounting

    The following are examples of errors that will not be revealed by a trial balance: (a) errors of omission (b) incorrect total on trial balance (c) posting to the wrong account (d) compensating errors (e) The balance of a general ledger account has been

    asked by masina
  106. Physics

    In an historical movie, two knights on horseback start from rest 79.7 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.323 m/s2, while Sir Alfred's has a magnitude of 0.252 m/s2. Relative to Sir

    asked by Sandra
  107. UNISA

    he earns 0.8% interest per month while the amount is less than R70000 and 0.7% interest per month if the amount is equal to or more than R70000, the interest is added to the total amount, calculate how many months he will have to save

    asked by Pam
  108. Physics

    You are driving your car, and the traffic light ahead turns red. You apply the brakes for 2.28 s, and the velocity of the car decreases to + 4.76 m/s. The car’s deceleration has a magnitude of 2.99 m/s2 during this time. What is the car’s displacement?

    asked by Sandra
  109. Physics

    A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.11 s. What is its initial velocity? Neglect air resistance.

    asked by Sandra
  110. science please help and explain asap

    A train with mass of 120mg accelerates uniformly on a horizontal track. The resistance to movement is 5N per kN of the mass of the train. The force in the draw-bar locomotive is 80kN Calculate a. The force required for constant speed b. The force that

    asked by Buhle
  111. physics

    From her bedroom window a girl drops a water-filled balloon to the ground, 4.75 m below. If the balloon is released from rest, how long is it in the air?

    asked by Sandra
  112. algebra

    solve the set of linear equations by the matrices method: a+3b+2c=3, 2a-b-3c=-8,5a+2b+c=9

    asked by linear
  113. math


    asked by Abraham
  114. Exponential Equations

    Jen made an initial investment of $1000 into a T-Bill account. After 2 years, her investment totaled $1 175. Calculate the rate of appreciation, r, of the investment. Give answer to 2 decimal places. 1000(1+r)=^2=1.1175 (1+R)^2=1.175 ??

    asked by Anonymous
  115. Math

    James is training for a marathon. Every week, he increases the distance he runs by 15%. If James is running 8.5 miles this week, how far will he be running 2 weeks from now? I did 30/100=x/8.5 . I thought that if I did 30 (for 2 weeks) instead of 15 (1

    asked by Deandrea
  116. physics

    A 13.1-g bullet is fired into a block of wood at 261 m/s. The block is attached to a spring that has a spring constant of 205 N/m. The block and bullet continue to move, compressing the spring by 35.0 cm before the whole system momentarily comes to a stop.

    asked by heltor
  117. calculus

    Find the area under one arch of curve y=cos(x/4). This lesson is plane areas in rectangular coordinates. I don't know how to solve it. Thanks for your help.

    asked by Jhun
  118. English

    Which sentence contains an infinite phrase? A. Anne passed the time by sharing her dreams. B. Anne wanted to live in Paris. C. Her favorite activity was riding a bike. D. Living in hiding, she did with little privacy. Is the answer A?

    asked by Anonymous
  119. English

    Which word best describes the speaker's attitude toward death in “Ode to a Nightingale”? A. fear B. relief C. horror D. anxiety My choice is D

    asked by Emi
  120. Physics

    a blood centrifuge starts from rest and attains a rotational speed of 3400 rpm after 50 seconds. 1) determine average angular acceleration of the centrifgue 2) a 3ml blood sample is contained in a test tube at distance 37.5mm from the centreline. Calculate

    asked by Presh
  121. Physics

    A skateboarder approaches the circular hill with a velocity of 8.0 m/s at point B. The angle formed between the lines that join point AO and BO is 20 degrees. a) what is her speed at the top of the hill(Point A) if she coasts up to this point? b) what min

    asked by Matthew
  122. English

    Which excerpt from the play best supports the answer to the reason Anne spend time with Peter in the third read of the diary of Anne Frank? A."I'm sorry Mother, I'm going to Peters room. I'm not going to let Petronella Van Dann spoil our friendship." B."I

    asked by Anonymous
  123. English

    1. Will you bring me the lamp? 2. OK. I'll bring it right back. 3. OK. I'll take it right back. ------------ Which answer is correct? Are both OK? Which one is commonly used?

    asked by rfvv
  124. Art

    Which task is typical for a fashion designer? A. Designing a storyboard B. Researching new trends C. Organizing an exhibition D. Creating an blueprint Is the answer B? Thank you

    asked by Kanani
  125. Chemistry

    Calculate ΔG (in kJ) at 298 K for some solid ZnF2, 0.055 M Zn2+ and 0.063 M F-(aq). I found Q to be 2.18e-4, then i implemented it into the equation deltaG=RT(lnQ). I got -20.89, but the answer is -12.2.

    asked by JUNDY
  126. English

    1. He kept a secret. 2. He broke a secret 3. He let out a secret. 4. He gave away a secret. 5. He betrayed a secret. ================= What is the opposite of #1? Can the others be used as the opposite? What is commonly used?

    asked by rfvv
  127. science.......,,....

    train with mass of 120mg accelerates uniformly on a horizontal track. The resistance to movement is 5N per kN of the mass of the train. The force in the draw-bar locomotive is 80kN Calculate a. The force required for constant speed b. The force that causes

    asked by aneleeeee
  128. physics

    A worker has to move a rock with mass 50 kg on a stairway from the first floor to the second floor of a house. The second floor is 4.6 m above the first floor and the stairway has 18 steps. The rock is lifted from step to step. How much energy (in Joule)

    asked by diane
  129. Please help asap science

    1. An electrical circuit consists of a battery with 2 cells,each with an EMF of 12 volts and an internal resistance of of 0.4 ohms,connected in parallel. An ammeter with an internal resistance of 0.15 ohms is connected in series with resistor Ra=2ohms and

    asked by Sarah
  130. math

    A rectangular piece of construction paper is 11 inches long and 8 inches wide. How could it be cut to make a rectangle that has an area of 32 square inches?

    asked by Shay
  131. Chemistry

    Explain why the solubility of KHTar in 0.100 M NaCl solution differs from that in pure water? Explain why the solubility of KHTar in the mixed KCL - NaCl solution differs from that in the 0.100 M NaCl.

    asked by Haley
  132. Algebra

    12. Determine if the following is a conjuction or disjunction. y + 4 < -1 or y + 2 > 8 (Points : 1) 13. State how you determined if the combination above was a conjunction or disjunction. (Points : 2) 14. Solve the problem. (Hint: You should have two

    asked by kim
  133. criminal justice

    could someone please let me know where I can find this type of question to read. discuss three key aspects of the school shootings that the court system has addressed so far. Thank you very much Mary Ann

    asked by Mary Ann
  134. civics and careers

    How does people's legal rights in the charter related to citizenship (informed, active citizen)? As many reasons as possible

    asked by lizzy
  135. science.......

    An electric bulb is marked 220v60w. An ammeter in the circuit shows the bulb uses a current of 0.2727A. The bulb burns for an hour. Calculate the following: A. The electrical energy consumption B. The cost for the bulb to burn for one hour if the cost of

    asked by owamiii
  136. physics

    one car of mass 15.0kg is moving 5.00m/s to the right on a frictionless track and collides with a cart of mass 3.00kg. the final velocity of the carts that become stuck together after the collision is 1.50m/s to the right. find the velocity of the second

    asked by tommy
  137. physics

    Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with

    asked by carolyn
  138. math

    Ted is helping his father plant their vegetable garden this year. They will put a fence around the garden. Ted measures the length of the garden, which is 6 feet. His father tells him that the width is twice the length. How much fencing do Ted and his

    asked by Dean
  139. Pre-calc

    There exist constants a, b, c, and d such that(sin x)^7 = asin 7x + bsin 5x + csin 3x + dsin x for all angles x. Find d. I tried rewriting them in the exponential form, but it becomes ugly as there are many negative cosines and divisions of i. Help?

    asked by Matthew
  140. math

    Joey's playhouse has a perimeter of 28 feet. What could be the dimensions of the playhouse? Draw a model and label the length and width. Show that the dimensions equal a perimeter of 28 feet.

    asked by Gabrielle
  141. Chemistry

    If the reaction 2NO + 2H2 --> N2 + 2H2O occurred in just a single step, the overall order of the reaction would be A) 1 B) 2 C) 3 D) 4 E) 5

    asked by Haley
  142. Chemistry

    In a chain mechanism, a reaction in which two free radicals combine to form a stable molecule would be called the A) initiation step B) termination step C) propagation step D) inhibition step E) branching step

    asked by Haley
  143. Algebra

    1. If m∠1=37º , what is m∠4? a) 53º b) 43º c) 37º d) 27º 2. If m∠1=50º , what is m∠5? a) 50º b) 40º c) 35º d) 25º 3. If m∠4=25º , what is m∠8? a) 105º b) 75º c) 175º d) 25º 4. What is the sum of the interior angles of a hexagon?

    asked by Maria
  144. Spanish

    How would I say "Unhealthy cafeteria food" in spanish? Would it be "comida de la cafetería no saludable"?

    asked by Anonymous
  145. math

    Janice walked around two sides of a square park. The perimeter of the park is 1,200 yards. How many yards did Janice walk? Explain your answer.

    asked by Barbara
  146. Math

    Use the function rule, y = 2x + 5, to find the values of y when x = 1, 2, 3, and 4. Write the answers as ordered pairs that would be used to graph the function. I did 3 I just need help with 1, 2 and 4.

    asked by Talea
  147. chemistry

    Describe the following types of corrosion and give a practical example of each 1.pure chemical corrosion 2.pure electrochemical corrosion

    asked by aneleeeee
  148. chemistry

    A piece of metal of mass 18 g at 104 ◦C is placed in a calorimeter containing 47.4 g of water at 22◦C. The final temperature of the mixture is 40.8 ◦C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the

    asked by kika
  149. math

    Roger just got a puppy for his birthday. He and his mother will build a fence around an area in the backyard for the puppy to play in. The play area will be 24 square feet. What dimensions could the play area be? Which dimensions would require the least

    asked by Isaac
  150. Math

    Patterns and colors on seventeenth to nineteenth century kimonos were used to identify the hometown of which of Japanese citizen? A. Farmers B. Nobility C. Warriors D. Lawmakers Is the answer C. Thank you

    asked by Kanani
  151. physics

    You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn

    asked by carolyn
  152. Business

    Wouldnt a "Administrative Assistant I" be considered as a non-exempt job??

    asked by Wendy
  153. Chem II

    The conversion of glucose into lactic acid drives the phosphorylation of 2 moles of ADP to ATP and has a standard free energy of -135 kJ/mol. C6H12O6 + 2 HPO4 + 2 ADP + 2 H+ --> 2CH3CH(OH)COOH + 2 ATP + 2H20 What is the standard free energy for the

    asked by Nicole
  154. English

    I need to describe the use of sound in Othello the play. Could someone give me an example from Act II for me to analyze please?

    asked by Linda
  155. physics

    a 16.0-g bullet is shot into a wooden block at rest with mass 4550g on a frictionless surface. the block moves 1.20m/s after the bullet strikes and becomes lodged in the block. find the speed of the bullet before striking the block.

    asked by tommy
  156. math

    A number has an 8 in the hundredths place. The number also contains a digit whose value is 1 } 10 the value of the 8 in the hundredths place. Which could be the expanded form of the number?

    asked by Lakshmi
  157. Physics

    A 5000 kg space shuttle starts at rest and linearly increases its thrust from 0N to 1000N across a displacement of 2000 meters. Calculate the total amount of work done on the shuttle.

    asked by jackie
  158. English

    In the following sentence, which word is used as a conjunction? Lisa and Mary were home on time, but Kim, Francine, and Penny weren't going to make it. A. On B. But C. Were D. And my answer is b.

    asked by Lauren
  159. Physics!

    An ammeter indicates the current for a toaster is 5.0 amps when the toaster is connected to 120-V circuit. How much energy is given off by the toaster in 42.0 seconds? show all the calculations leading to your answer

    asked by Ciara
  160. physics

    Hooke's law

    asked by kate
  161. Bus 101

    Can someone help me to compare answer for final exams introduction to Business - These are my answers Here are my answers... 1.c 2.a 3.a 4.d 5.c 6.b 7.a 8.b 9.c 10.b 11.a 12.a 13.c 14.d 15.a 16.a 17.a 18.8 19.c 20.b 21.a 22.a 23.d 24.a 25.b 26.d 27.a 28.b

    asked by Devon
  162. English

    Choosing a good reviewer for your writing means finding someone who A. is a close friend and will give you a positive review. B. concentrates on correcting your spelling and grammar errors. C. will concentrate on your ideas and how well you support them.

    asked by Lauren
  163. calculus

    Solve the equation. Give the exact solution. 2*10^(5x-3)+5=17

    asked by Michael J
  164. Business math

    At the beginning of each year, Al rose invested $1,200 semiannually at 12 percent for 8 years. The cash value of the annuity due at the end of the eighth year is?

    asked by Joe
  165. History

    1. Why do some argue that the Supreme Court "legislates from the bench" or, in other words, actually makes law? A. The Supreme Court does not legislate, i.e. make law. B. The Supreme Court is involved in administrative law. C. The Supreme Court's rulings

    asked by Nadia
  166. Science(need help)

    1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now

    asked by vivis
  167. History

    Is India a secular democracy? This isn't a homework question or anything this is just something I was wondering.

    asked by Anonymous
  168. science

    these are all very confusing for me 1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this

    asked by kat101
  169. Keep Memory Alive by Elie Wiesel

    How could the "future of mankind" be sacrificed on "the fiery alter"?

    asked by Victoria
  170. English

    During revision, you should scan your paper for _______ words and replace them with concrete words or phrases. A. figurative B. general C. formal D. informal my answer is b.

    asked by Lauren
  171. Chemistry

    What is the mass in grams of 6.5 moles of water? could you show me how you get the answer to

    asked by jimm
  172. math

    In a local school 34 students are enrolled in a math class, 85 are enrolled in an english class, 58 are enrolled in an art class, and 54 are enrolled in a history class. Construct a pie chart with this data. What is the central angle of the slice

    asked by heem
  173. geometry

    A small airplane takes off from point A and continues to climb upward in a straight line, as shown in the diagram. What is the plane’s distance from point A when it reaches point C

    asked by tiffany
  174. Chemistry

    What is the molarity of a solution containing 10.g of NaOH in 700.mL of NaOH solution? Express your answer to two significant figures and include the appropriate units.

    asked by Chan
  175. Physics 1

    A rotating cylinder about 5.0 miles in diameter is designed to be used as a space colony. With what tangential velocity must it rotate so that the residents on it will experience the same acceleration as that due to gravity on Earth? Recall that ag=g=-9.8

    asked by Brittany
  176. chemistry

    Find (triangle)H for N2H4 + CH4O > C2HO + N2 + 3H2 2NH3 > N2H4 + H2 22.5 kJ 2NH3 > N2 + 3H2 57.5 kJ CH20 + H2 > CH4O 81.2 kJ

    asked by Anonymous
  177. Chemistry

    1. If two moles of ZnCl2 separate into Zn+ and Cl- ions, how many moles of Zn+ ions are present? 2. How many moles of NO3- are present in one mole of Mg(N03)2? The answers to both of these are 1 mole, right?

    asked by G

    Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenarios below indicate what changes (if any) take place A. Total resistance of the circuit B. Total current of the circuit C. Power

    asked by Ciara
  179. chemistry cp

    The term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because (a) ionic compounds exist as individual molecules (b) molecular formulas are always empirical formulas (c) not all formulas represent

    asked by sally
  180. English

    Which of the following is not a type of sentence? A. Simple-compound B. Simple C. Compound-complex D. Complex my answer is b.

    asked by Lauren
  181. Algebra

    Factor the following as if it were a trinomial. 25x^(3/2) + 10x^(3/4) + 1

    asked by Merty
  182. Math

    An airplane climbs 100 feet during the first second of takeoff. In each succeeding second it climbs 100 feet more than during the previous second. How many seconds does it take for the plane to reach an altitude of 12000 feet?

    asked by ER
  183. Math

    Does a in y=ax^2+bx+c have to be positive?

    asked by Anonymous
  184. math

    charlie says that y=2x squared is not a function because the same y-value sometimes corresponds to more than one x-value. Is charlie correct

    asked by Maria
  185. Math

    How do you find x in y=-5x^2+30.5x without using the formula x=-b+ root b^2-4ac.... They say to factor it. But it's not working for me. The answer is suppose to be x= About 0.7 and 5.4. But I can't get that answer

    asked by Anonymous
  186. Calculus

    When production is 1700, marginal revenue is 8 dollars per unit and marginal cost is 6.75 dollars per unit. Do you expect maximum profit to occur at a production level above or below 1700? If production is increased by 50 units, what would you estimate the

    asked by Nope
  187. mah

    Let A = {a, b} and list the four elements of the power set P (A). We consider the operations + to be ∪, · to be ∩, and complement to be set complement. Consider 1 to be A and 0 to be ∅. a. Explain why the description above defines a Boolean algebra.

    asked by excel
  188. math help

    Simplify this expression fully 6^x 2-3^x.2^x 1/6^x-1

    asked by lesedi
  189. Analytical Chemistry

    Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 3.00xE2 units was obtained for the intensity of the 671 nM red emission line. Then 1.00 mL of a 11.8 mM Lithium standard

    asked by teresmajor16
  190. Socials 1 question

    How does birth control affect our world population? Please give me a list of ideas, no sites please I know it helps reduce population growth rate but please tell me more about countries who don't have birth control and what it results in etc.. Thanks :)

    asked by Maya
  191. Science

    What kind of energy is transferred in an energy pyramid

    asked by M
  192. chemistry

    16.5 mL of 2.5 M sodium sulfate is mixed with 35.5 mL of 4.5 M sodium nitrate. What is the concentration of all ions in the new solution?

    asked by Marissa
  193. Chemistry

    24.0 mL of a 2.4 M silver nitrate is mixed with 32.0 mL of 2.0 M sodium. Calculate the mass of precipitae formed. Calculate the concentration of all ions remaining in solution after the precipitate forms. I don't know how to start this or where to go with

    asked by Marissa
  194. physics

    The figure below shows a clawhammer as it is being used to pull a nail out of a horizontal board. A force of magnitude 130 N is exerted horizontally as shown. (NOTE: Assume that the force the hammer exerts on the nail is parallel to the nail and

    asked by Nick
  195. math

    If the product of two numbers is even, and the result is an odd number , what is the numbers ?

    asked by Iman
  196. Chemistry

    I don't understand this one at all. Please help! For the equation: MnO2 (s) + 2 CO (g) → Mn (s) + 2 CO2 (g) 1. Calculate ΔG° at 25°C 2. Calculate ΔG° at 125°C

    asked by Kate
  197. Math

    the Ruby Snow Company makes custom snowboards. the company's profit can be modelled with the relation y=6x^2+42x-60,where x is the number snowboards sold(in thousands) and y is the profit (in hundreds of thousands of dollars) How many snowboards does the

    asked by Anonymous
  198. Chemistry

    What are the correct and accurate products of the following neutralization reaction. Then write the ionic form of the equation and the net ionic form. KOH + H2SO4 ->

    asked by Emily
  199. social studies

    1) Diversity most closely means (1 point) a. sharing cultural traits and practices with others. ** b. making up a whole of many different parts. c. being a member of a small ethnic group. d. having many similar regions next to one another. 2) How does life

    asked by Leala
  200. math help

    A tank has two pipes entering it.when operating together,they fill the tank in 40 minutes.operating independently,one of the pipes fills the tank 60 minutes faster than the other one does. calculate the time taken by each pipe to fill the tank on its own.

    asked by happy
  201. Math

    Makoto's lacrosse practice last 1 3/4 hours. This week he attended all of the practice on Monday and Wednesday, but he had to leave halfway through practice on Friday. How many hours did Makoto's spend at lacrosse practice this week? 1 3/4 + 1 3/4 +1 3/4.

    asked by AC
  202. chem

    Low-pressure sodium lamps have a sodium vapor pressure of 0.7 Pa at 260 °C. How many micrograms of Na must evaporate at 260 °C to yield a pressure of 0.7 Pa in a 27-mL bulb?

    asked by vc
  203. math help

    Simplify this expression fully 9-x^2/x^2 3x-18

    asked by morongwa
  204. Math

    1) When will the dependent variable in the equation y=√x+4-3 equal or exceed to 4? A) x > or equal to -0.17 B) x > or equal to 45 C) x > or equal to 48 D) x > or equal to 53 2) The function t=√d/16 models the time (t) in seconds that an object has been

    asked by Tia
  205. Math


    asked by Saio
  206. math help

    Given F(x)=-6/x-3 -1 1.for which values of x is f(x) undefined? 2.for which values of f will the function have real roots 3.what is the domain of f 4.calculate the x and y intercepts of f

    asked by selowa