Popular questions and responses by AJ
  1. physics

    Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C

    asked on March 9, 2011
  2. English

    Read the passage from “Why Leaves Turn Color in the Fall.” Was that a goldfinch perching in the early September woods, or just the first turning leaf? A red-winged blackbird or a sugar maple closing up shop for the winter? What is the figurative

    asked on June 22, 2020
  3. History

    In 1885, European leaders at the Berlin Conference agreed to the rules for dividing African territory. How did this agreement change the geographic characteristics of Africa? a)Large wildlife reserves were created throughout Africa. b)Ethnic groups were

    asked on July 8, 2020
  4. History

    What led to the Boxer Rebellion? The Open Door policy led other nations to carve out spheres of influence in China, leading to condemnation of the imperialists. European attempts to introduce industrialization in mainland Asia led the Chinese to react by

    asked on July 9, 2020
  5. Physics

    If you are wearing a watch, what energy changes are taking place in it right now?

    asked on March 16, 2010
  6. Math

    If 1 pound, 12 ounces of fish cost $2.24, what is the cost of the fish per pound?

    asked on November 26, 2017
  7. calculus

    Find the value of $800 deposited in a bank at 10% interest for 8 years compounded in the following ways. (Round your answers to the nearest cent.) (a) annually_________$ (b) quarterly_________$ (c) continuously________$

    asked on March 7, 2018
  8. World History

    What was a key battlefront between Great Britain and Turkey in World War I? Battle of Verdun Gallipoli Campaign Brusilov Offensive Battle of the Somme c?

    asked on July 11, 2020
  9. math

    (a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.

    asked on March 14, 2011
  10. Chemistry

    Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

    asked on March 26, 2017
  11. Chemistry

    When .560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation of NaF(s)? Start off by balancing the equation: 2Na(s) + F2(s) ---> 2NaF(s) Then make it for

    asked on March 26, 2017
  12. Physics

    A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm

    asked on October 1, 2012
  13. Physics

    Beth, a construction worker, attempts to pull a stake out of the ground by pulling on a rope that is attached to the stake. The rope makes an angle of 60.9 ◦ with the horizontal. If Beth exerts a force of 116 N on the rope, what is the magnitude of the

    asked on October 21, 2012
  14. calculs

    A page of 150 square inches is to have margins of 1 inch on either side and 1 1/2 inches at the top and bottom, as in the diagram. Find the dimensions of the page that maximize the print area.

    asked on March 4, 2018
  15. Math

    If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)

    asked on September 23, 2013
  16. Algebra

    Jack and Jill regularly run around an 800-meter track, but Jack runs 2 m/s faster. If they start from the same point on this track, and run in the same direction, Jack will eventually pass Jill in 6 minutes and 40 seconds. What is Jill's speed?

    asked on February 8, 2018
  17. government

    Which institution developed outside the limits of the written Constitution of the United States?

    asked on February 10, 2012
  18. math

    A rich uncle wants to make you a millionaire. How much money must he deposit in a trust fund paying 8% compounded quarterly at the time of your birth to yield $1,000,000 when you retire at age 59?

    asked on March 11, 2018
  19. arithmetic

    If you have 3 cups of pineapple juice and, how many total cups of punch can you make? Table: Ginger Ale - 40% OJ 25% Pineapple juice 20% Sorbet 15

    asked on November 3, 2014
  20. Physics

    A dart is thrown horizontally with an initial speed of 14 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.19 s later. (a) What is the distance PQ? (b) How far away from the dart board is the dart

    asked on September 14, 2014
  21. English

    how do I start an Auto Biography? I mean what sentence should i start it with?

    asked on September 6, 2014
  22. Science

    Uranium-238 is less stable than oxygen-16. What accounts for this difference? (A) Uranium is a solid, while oxygen is a gas. (B) Unlike oxygen-16, uranium-238 has a nucleus in which repulsive electric forces surpass the strong nuclear forces. (C) Oxygen-16

    asked on November 20, 2013
  23. Physics

    A baseball coach shouts loudly at an umpire standing 3.6 meters away. If the sound power produced by the coach is 2.2×10−3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.

    asked on October 21, 2012
  24. algebra

    Joseph always throws change into a can and takes it out every two weeks. This time it is all nickels and dimes. There are six times as many dimes as nickels, and the value of the dimes is $4.95 more than the value of the nickels. How many nickels and dimes

    asked on April 22, 2012
  25. Math

    Calculate the number of sides of a regular polygon whose interior angles are each 156 degrees.

    asked on December 4, 2011
  26. govt

    Which act is an example of governor's use of legislative powers? a firing a parks commissioner b rejecting part of a recycling bill c pardoning a former senator d assessing flood-control efforts

    asked on July 14, 2011
  27. physics

    A projectile was fired at 35 degrees above the horizontal. At the highest point in its trajectory its speed was 200 m/s. If air resistance is ignored, the initial velocity had a horizontal component of 0. How is this possible? Someone explain it for me

    asked on November 30, 2010
  28. Physics

    A 0.103 kg ball is moving 11.9 m/s when it runs into a spring of spring constant 66.9 N/M . How far does the spring compress in bringing the ball to a stop? Please help quickly thank u

    asked on June 17, 2019
  29. geometry

    1)The Arthur Ravenel Jr. Bridge is the longest cable-stayed bridge in the United States. The bridge has a total length of 13200 feet. Each year, the Cooper River Bridge 5K Run is held in the Spring. If there are approximately 16404 feet in 5 kilometers,

    asked on July 29, 2018
  30. Probability

    In how many ways can 7 people be lined up in a row for a picture if two of them should have at least 2 people between them?

    asked on March 18, 2018
  31. calculus

    Marine ecologists estimate the reproduction curve for swordfish in a fishing ground to be f(p) = −0.01p^2 + 8p, where p and f(p) are in hundreds. Find the population that gives the maximum sustainable yield, and the size of the yield.

    asked on March 4, 2018
  32. Math

    True or False. 1. Every function is a relation. 2. When you switch the inputs and outputs of any function, the resulting relation is a function.

    asked on February 3, 2018
  33. Math

    A square measure 9 feet on a side. If each side of the square is increased by 3 feet, how many square feet are added to the area? What are the steps in solving this math equation?

    asked on November 25, 2017
  34. Math

    my divisor is 5 I'm greater than 4 X 5 I'm less than 5 x 5 my remainder is 1 what dividend am I

    asked on February 20, 2017
  35. Math Slope

    Jose the plumber charges $65 per hour to fix your plumbing. He uses the equation C=65H+100 to determine the charge of his services, C, after working h hours. What is the Y intercept? What does it represent in the context of the problem.

    asked on December 30, 2016
  36. Math

    A running track consists of two straight sections with semi-circular ends. If the straight sections measure 100 metres and one compete lap on the inside of the track measures 1/2 k, what is the distance x between the two straights?

    asked on August 15, 2016
  37. algebraic modeling

    A toy manufacturer determines that the daily cost,C, for producing x units of a dump truck can b approximated by the function c(x)=0.005x^2-x+109 I got that the manufacturer must produce 100 units per day... What is the minimum daily cost?

    asked on May 13, 2015
  38. Physics

    A certain lightbulb has a tungsten filament with a resistance of 28 Ω when cold and 144 Ω when hot. If the equation R = R0 [1 + α ∆T ] can be used over the large temperature range involved here, find the temperature of the fila- ment when it is hot.

    asked on October 31, 2012
  39. physics

    A gazelle is running in a straight line (the x-axis). The graph in the figure (Figure 1) shows this animal's velocity as a function of time. During the first 12.0 , find the total distance moved

    asked on October 9, 2012
  40. Physics

    The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental

    asked on October 5, 2012
  41. Physics

    A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.

    asked on October 1, 2012
  42. Physics

    The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength answer in m What is the fundamental frequency? Answer

    asked on October 1, 2012
  43. compostition

    I need a topic to Write a 150- to 200-word paragraph to explain how purpose, audience, tone, and content impact academic writing. Be sure to use the three components of a good paragraph covered in this weekâ??s readings. Underline the topic sentence and

    asked on July 22, 2012
  44. physics

    A 500g block is released from rest and slides down a frictionless track that begins 2m above the horizontal. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant of 20.0N/m. Find

    asked on August 10, 2011
  45. english

    Make a noun by adding a suffix to the word priest. write a sentence.

    asked on November 14, 2010
  46. math

    Oregon is about 400 miles from west to east, and 300 miles from north to south. If a map of Oregon is 15 inches tall (from north to south), about how wide is the map? PLEASE HELP AND EXPLAIN IT Set up a proportion: 15/300 (the ratio of inches to miles,

    asked on January 16, 2007
  47. Science

    What is polluting the water in Watertown

    asked on May 21, 2020
  48. Career

    One of the benefits of career planning as a young adult is: *you can train your brain. you will use the information years from now. you are relying only on yourself for the information. now is a time in your life where you have the least spare time.

    asked on May 21, 2020
  49. Math

    How to get 2 equivalent fractions to 28/32

    asked on December 2, 2019
  50. Economics

    Suppose that when disposable income rises from $5.2 trillion to $6.0 trillion, consumption rises from $5.0 trillion to $5.6 trillion. What is the marginal propensity to consume?

    asked on March 7, 2018
  51. Math

    You are making cookies. One recipe calls for 4 cups of chocolate morsels for 3 batches of cookies.. A second recipe calls for 5 cups of chocolate morsels for 4 batches of cookies. Which cookies will contain more chocolate morsels?

    asked on January 25, 2018
  52. Physics

    a) The recommended daily allowance (RDA) of the trace metal magnesium is 410 mg/day for males. Express this quantity in ?g/s. Express this quantity in b) For adults, the RDA of the amino acid lysine is 12 mg per kg of body weight. How many grams per day

    asked on June 9, 2017
  53. discrete math

    A bubble sort begins with the array: 372418 Work through the lists obtained at each step of the bubble sort. Complete the table below for the intermediate step where 7 is at position four in the array. [][][]7[][]

    asked on March 9, 2017
  54. Math

    2/3>3/ number that makes the statement true.. I am confused

    asked on October 13, 2015
  55. Math

    The local health club is advertising a special for new members: no initiation fee to join and lnly $34.50 per month for the first year. If Andy joins the health club for one year, how much will he spend on membership?

    asked on September 14, 2015
  56. chemistry

    What volume of 0.050 M AgNO3, silver nitrate solution is required to reat completely with 60.0 mL of 0.025 M K2S, potassium sulfide?

    asked on March 13, 2015
  57. Math

    Write a word phrase for this algebraic expression. 6.5-h

    asked on October 28, 2014
  58. Physics(Science)

    Waves on a 5.0 m rope travel at a speed of 92 m/s. If the tension in the rope is 497 N, what is the mass of the rope?

    asked on October 26, 2014


    asked on August 12, 2014
  60. Spelling

    Wordly wise 3000 book 7 lesson 7c vocab answers?

    asked on December 17, 2013
  61. physics

    The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in

    asked on July 16, 2013
  62. math

    32 subjects in a study were recruited by advertisements to participate in a study of attitudes and values toward wine. What assumption are you making about these subjects? (I noticed that the problem does not state it is a SRS.)

    asked on April 3, 2013
  63. trig

    the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15

    asked on November 8, 2012
  64. physics

    A typical color television draws about 2.8 A when connected to a 145 V source. What is the effective resistance of the T.V. set? Answer in units of Ω.

    asked on October 31, 2012
  65. Physics

    A skyrocket explodes 77 m above the ground. Three observers are spaced 106 m apart, with observer A directly under the point of the explosion. Find the ratio of the sound intensity heard by observer A to that heard by observer B. Find the ratio of the

    asked on October 21, 2012
  66. Physics

    An experiment requires sound intensity 0.942 W/m2 at the distance of 2.7 m in any direction from a speaker. What total sound power is required? Answer in units of W.

    asked on October 21, 2012
  67. Physics

    A harmonic wave in a wire has amplitude A = 7.6 mm, wavelength λ = 0.679 m and frequency f = 543 Hz. What is the propagation speed of the wave? Answer in units of m/s. The wire has linear mass density of 5.04 g/m. Determine the wire’s tension. Answer in

    asked on October 21, 2012
  68. Physics

    A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 44.9 in 30.4 s. Also, a given maximum travels 436 cm along the rope in 9.4 s. What is the wavelength? Answer in units of cm

    asked on October 21, 2012
  69. Physics

    When a particular wire is vibrating with a frequency of 5.3 Hz, a transverse wave of wavelength 69.3 cm is produced. Determine the speed of wave pulses along the wire. Answer in units of m/s.

    asked on October 21, 2012
  70. Physics

    The time needed for a water wave to change from the equilibrium level to the crest is 0.4185 s. What fraction of a wavelength is this? What is the period of the wave? Answer in units of s. What is the frequency of the wave? Answer in units of Hz.

    asked on October 21, 2012
  71. Physics

    To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

    asked on October 5, 2012
  72. Physics

    To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

    asked on October 1, 2012
  73. physics

    Two point charges are placed along a horizontal axis with the following values and positions: +3 µC at x = 0 cm and - 12 µC at x = 35 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one

    asked on September 11, 2012
  74. algebra

    A man invested half of his money at 5%, one-third of his money at 4%, and the rest of his money at 5.5%. If his total investment income was $570, how much had he invested? and please show me the solution to solve this problem. thanx sorry bobpursly I cant

    asked on February 25, 2012
  75. govt

    In 21 states voters may propose and pass laws without the legislature a.by direct initiative b by indirect initiative c by optional referendum d by mandatory referendum

    asked on July 14, 2011
  76. exp of math

    add and simplify 96/125 + 83/125 + 2/15 =

    asked on July 14, 2011
  77. math

    A man is 67 7/18 taller than his son his son is 65 ¾ tall how much taller is the man?

    asked on July 14, 2011
  78. Physics

    A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?

    asked on April 15, 2011
  79. Algebra

    Name the property shown by the following statement: 9x+0=9x?

    asked on April 8, 2011
  80. calculus SIMPSON RULE

    Use Simpson's Rule and all the data in the following table to estimate the value of the integral . x -16 -15 -14 -13 -12 -11 -10 y -8 9 4 9 -5 -9 3

    asked on March 14, 2011
  81. College Algebra

    two trains leave a train station at the same time. One travels east at 10 miles per hour, the other travels west at 9 miles per hour. In how many hours will the two trains be 45.6 miles apart?

    asked on August 31, 2010
  82. Accounting

    Explain the accounting purpose of each general ledger cycle

    asked on September 14, 2009
  83. chemistry

    How do you balance this redox rxn? Al + HNO3 ----> Al(NO3)3 + NH4NO3 +H2O

    asked on April 22, 2009
  84. science

    Bess filled a syringe with water and left it by the sink in the sunshine. Ten minutes later she saw a puddle of water under the syring tip so she thought it was broken, but it wasnt. What do you think caused the little puddle of water to appear under the

    asked on February 4, 2008
  85. reading

    Who is the antagonist in the book, Death Be Not Proud? Also, what type of conflict is it and what is the climax of the story? Is the climax when Johnny starts having a stiff neck and they discover he has a tumor in his brain? And what is the dialect of the

    asked on August 30, 2007
  86. reading

    Who is the antagonist in "The Face on the Milk Carton"? Also, what is the climax and what is the type of conflict. Please and thank you. Please check this site. http://en.wikipedia.org/wiki/The_Face_on_the_Milk_Carton Thank you for the site, but it still

    asked on August 3, 2007
  87. Biology

    What law of thermodynamics explains the fact that if you drop an egg, the shell will not spontaneously repair itself? The second law

    asked on February 24, 2007
  88. Geography

    I need to do a report on the Mediterranean. I need to know the growing seasons and animals in the Mediterranean. PLEASE HELP ME!!! "Mediterranean type of climate where plant growth occurs during the winter and dormancy during the summer. " You can find

    asked on November 13, 2006
  89. Career

    QUESTION 1 -It is important to upgrade your skills as the career world is in a constant state of change. *True False QUESTION 2 -An important component of career planning is completing career research. *True False QUESTION 3 -When taking personal

    asked on May 21, 2020
  90. physics

    Evelyn lifts a 180-kg barbell to a height of 1.95 m. What is the increase in the potential energy of the barbell?

    asked on April 29, 2020
  91. social studies

    Compare the GDP of Kenya, Nigeria and South Africa? Suggest two reasons for the differences between the GDP of the countries

    asked on March 17, 2020
  92. Math

    Three friends want to share five brownies so each friend gets the same amount. How much brownie will each friend get?

    asked on February 10, 2020
  93. Science

    What defined the Ordovician period?

    asked on December 26, 2019
  94. math

    The angle of elevation of the sun is 27 degree. If a tree is 12 yd tall how long will the shadow be?

    asked on December 13, 2019
  95. science

    what mass of copper at 90 degrees celcius when added to 200g of water at 15 degrees celsius contained in a 100g aluminum calorimeter will give a final temperature of 25 degrees celcius

    asked on December 1, 2019
  96. Math

    If 2 equals 14, what does 5 equal?

    asked on November 12, 2019
  97. social studies

    East Asian nations have imposed tariffs and other trade barriers to protect their industries, but these barriers have economic growth. benefitted encouraged slowed sped up Which major threat does North Korea pose for the region? A. North Korea's nuclear

    asked on October 2, 2019
  98. social studies

    Which is a source of political conflict between China, Japan, and South Korea today? A. trade barriers B. nuclear weapons development /my answer/ C. land claims in the South China Sea D. economic sanctions

    asked on October 2, 2019
  99. Chemistry

    If I am asked to find the # of unpaired electrons in a molecule, do I just find the number of unpaired electrons for each atom and add them together? For example, MgSO4. Mg has 0 unpaired electrons. S has 2 unpaired electrons. O has 2 unpaired electrons.

    asked on September 25, 2019
  100. Career

    You need a college degree to enter the military. True False Is it false?

    asked on September 24, 2019


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