AJ

Most 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. Maths

    17. Atlanta, Georgia, receives an average of 27 inches of precipitation per year, and there has been 9 inches so far this year. How many more inches, p, of precipitation can Atlanta get and to stay at or below the average? (1 point) p + 9 > 27; p > 18 9 +

    asked on February 4, 2018
  3. 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
  4. math

    Why Was the Engineer Driving the Train Backwards?

    asked on March 27, 2015
  5. 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
  6. 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
  7. Geography

    which demographic group is correctly matched with its issue A.religious people - farm subsidies B.midwesterners - farm subsidies C.single parents - affirnmative action D.all are matched correctly

    asked on March 16, 2016
  8. 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
  9. geo

    what are the human activities in the innuitian mountains?

    asked on January 9, 2010
  10. 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
  11. Spelling

    Wordly wise 3000 book 7 lesson 7c vocab answers?

    asked on December 17, 2013
  12. 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
  13. Chemistry

    In a car gas tank, 46.0 g of gasoline burns consuming 173 g of oxygen. The resultant products are carbon dioxide are carbon dixide and water. What is the total combined mass of the products? Would it be 173g - 46.0g = 127g

    asked on February 4, 2008
  14. 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
  15. Physics

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

    asked on March 16, 2010
  16. 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
  17. Algebra

    Rene used a $4 off coupon to buy bows which cost $2 each. Write an inequality rene could use to determine the number of bows she can buy if she plans to spen more that $8. Then graph the solution set

    asked on April 16, 2016
  18. 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
  19. 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
  20. 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
  21. government

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

    asked on February 10, 2012
  22. Chemistry

    Why do we assume 100% ionization for acetic acid (a weak acid)? This is a titration problem. The titrant is sodium hydroxide, if that helps.

    asked on April 13, 2019
  23. 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
  24. Science

    The water in a beaker has a mass of 18g. Electricity is passed through the water for two hours. Afterward the water has a mass of only 16g. What happened to the missing mass? The water heated up due to the electrical current going through it, and some of

    asked on April 22, 2007
  25. English

    What type of clause or phrase is italicized in the sentence below? The play, a three-act farce, amused everyone.

    asked on September 23, 2013
  26. 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
  27. Math

    Express the product (1−1/2^2)(1−1/3^2)(1−1/4^2)···(1−1/21^2) as a fraction a/b, where a and b are relatively prime positive integers.

    asked on November 11, 2018
  28. 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
  29. 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
  30. analytic geometry

    A parabola y=ax^2+bx+c has vertex (4,3). If (3,0) is on the parabola, find a.

    asked on October 30, 2018
  31. Math

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

    asked on October 13, 2015
  32. math

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

    asked on March 14, 2011
  33. Microecon

    Using the midpoints approach to the cross elasticity of demand-calculate the cross eleasticity the demand for golf at all 3 prices. Price Demand1 D2 D3 50 15 10 15 35 25 15 30 20 40 20 50 D1 -Income $50k per yr, movies $9 D2 -Income $50k -movies $11 D3

    asked on November 1, 2012
  34. physics

    How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?

    asked on March 9, 2011
  35. Maths

    Write an equation of the line that passes through (-5,-1) and is parallel to the line y=-3x+6

    asked on August 10, 2018
  36. Math

    30-second oral question The expression 9(2018^2)+20180+4040 is a square of what positive integer?

    asked on February 10, 2018
  37. 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
  38. 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
  39. 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 5, 2012
  40. algebra

    there is a cylinder perfume bottle the height is 12.4 cm the radius is 6.2 cm the formula is v= h * 3.14 * r squared

    asked on January 31, 2019
  41. 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
  42. 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
  43. Physics

    A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N

    asked on January 7, 2014
  44. chemistry

    How many moles of Ca(NO3)2 are needed to make 0.250 liters of a 0.200 M Calcium nitrate solution?

    asked on April 29, 2012
  45. 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
  46. Maths

    There are 150 mangoes in basket p and basket q. 1/4 of the mangoes in basket p were yellow and the rest were green. 3/5 of the mangoes in basket q were yellow and the rest green. The number of green mangoes in both baskets were equal. How many yellow

    asked on February 14, 2017
  47. 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
  48. 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 5, 2012
  49. 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
  50. Physics

    An ac generator supplies an rms voltage of 5.00 {\rm V} to an RL circuit. At a frequency of 21.0{\rm kHz} the rms current in the circuit is 45.0 {\rm mA}; at a frequency of 26.0{\rm kHz} the rms current is 40.0 {\rm mA}. Find value of L an R ?

    asked on July 30, 2012
  51. math

    A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

    asked on March 14, 2011
  52. Language

    In O Captain! My Captain! I need help finding out what are they comparing to the civil war

    asked on February 28, 2019
  53. 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
  54. MATH HELP!!

    SID WROTE 541,309 ON HIS PAPER. USING NUMBERS AND WORDS EXPLAIN HOW THE NUMBER WOULD CHANGE IF HE SWITCHED THE DIGITS IN THE HUNDRED THOUSANDS AND TENS PLACES

    asked on August 20, 2014
  55. math college

    A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

    asked on March 14, 2011
  56. college math

    You won the lottery. They will pay you 1 million dollars a year for 20 years. Assuming 10 percent interest compounded continuously, approximate the present value of your winnings by assuming the money is paid to you continuously over the period of each of

    asked on March 14, 2011
  57. Social Sciences-Social Anthropology

    Hi Please help me I am confused Am I a homo sapiens? or a homo sapiens sapiens? thank you so much.

    asked on November 30, 2017
  58. math

    (a). For any connected graph G, all internal nodes of the BFS tree on G have the same number of children. (b). For any connected graph G, the DFS tree on G and the BFS tree on G have the same number of edges.

    asked on March 14, 2011
  59. Chemistry

    The freezing point depression of a 0.100 molality solution of NaCl(aq) solution is 0.34 deg C. Calculate the % dissociation of NaCl(aq) (Kf for water = 1.86 deg Cm^-1)

    asked on August 30, 2009
  60. 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
  61. 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
  62. 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
  63. Physics

    A pipe that is open at both ends has a fundamental frequency of 330 Hz when the speed of sound in air is 333 m/s. What is the length of this pipe? Answer in units of cm. What is the second harmonic? What is the third harmonic? Answer in units of Hz. What

    asked on October 1, 2012
  64. algebra

    Emily wants to buy turquoise stones on her trip to New MExico to give to at least 4 of her friends. The gift shop sells stones for either $4 or $6 per stone. Emily has no more than $30. What are the system of inequalities so I could be able to graph them?

    asked on January 27, 2008
  65. 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
  66. 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
  67. Chemistry

    Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to and defined by the quantity dHformation [NH3(g)] N2(g) + 3H2(g) --> 2NH3(g) Is that all the question is asking for?

    asked on March 26, 2017
  68. Chemistry

    The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 ---> C4H10

    asked on March 26, 2017
  69. 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
  70. Physics

    A wire with a circular cross section and a resistance R is lengthened to 3.77 times its original length by pulling it through a small hole. After being pulled through the hole, the total volume of the wire is unchanged. Find the resistance of the wire

    asked on October 31, 2012
  71. Math 5th grade

    how is the number of zeros in the quotient of 420 divided 7 = 60 related to the number of zeros in the dividend

    asked on November 30, 2010
  72. chemistry

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

    asked on April 22, 2009
  73. 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
  74. 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
  75. Chemistry

    Calculate the pH of 175.0 mL of H2O following the addition of 0.57 mL of 1.39 M NaOH

    asked on October 3, 2017
  76. 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
  77. 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
  78. 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
  79. 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
  80. college math

    A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the

    asked on March 14, 2011
  81. Physical science

    A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey stick?

    asked on March 14, 2011
  82. Math

    A man and his wife share a sum of money in the ratio 3:2. If the sum of money is doubled, in what ratio should they divide it so that the man still rceives the same amount?

    asked on October 17, 2010
  83. 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?

    asked on August 30, 2007
  84. Science

    A sample of water decomposes to make 4g of hydrogen gas and 32g of oxygen gas. What mass of water decomposed? How do you know? Hint: The water decomposes into ONLY hydrogen and oxygen, and the total mass does not change in the process. It's called the Law

    asked on April 22, 2007
  85. 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
  86. 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
  87. Grammar

    Before the items that are complete sentences, write S. Before those that contain fragments, write F. Before a run on sentence, write RS. 1. We often walk through the woods, picking berries and listening to the birds. Is this a run on sentence?

    asked on July 2, 2014
  88. calculus

    the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the

    asked on April 23, 2013
  89. 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
  90. Analytic Goemetry

    Find the equation of the parabola with axis parallel to the x-axis and passing through (3/2,1),(5,0) and (-1,2).

    asked on March 23, 2011
  91. Analytic Goemetry

    Find the equation of the parabola whose axis is horizontal, vertex on the y-axis and which passes through (2,4) and (8,-2).

    asked on March 23, 2011
  92. 12 grade economics

    describe four advantages of using price as an allocating mechanism?

    asked on July 14, 2009
  93. geometry

    suppose the diameter of a circle is 20in. long and a chord is 16in. long. What is the distance from the center of the circle to the chord Draw a radius from the center to the end of the chord. THe draw a radius from the center perpendicular to the chord.

    asked on July 8, 2007
  94. math

    what is the opposite of square rooting? take the square root of 9. you get 3. so what do you have to do to 3 to get 9? square it

    asked on July 2, 2007
  95. calculus

    The reproduction function for a sardine is f(p) = −0.0004p^2+3p, where p and f(p) are in hundred metric tons. Find the population that gives the maximum sustainable yield, and the size of the yield. population=_________ hundred metric tons size of

    asked on March 5, 2018
  96. 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
  97. Math

    A soccer field has a perimeter of 26 yards.if the width is 8 yards,how long is the length?

    asked on January 24, 2017
  98. 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
  99. math -hw help

    Determine whether the following regular tetrahedrons have an edge length that is a whole number, a rational number or irrational number. The surface are of a tetrahedron is given by the equation: SA = √ 3s^2 Surface are of regular tetrahedron A = 1.5

    asked on February 5, 2015
  100. 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

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