Popular questions and responses by Josh
  1. math

    1.A wind turbine has blades 50m in diameter and an overall height of 125m. If it has four blades instead of three, create four equations modelling the height of a point on the tip for each of the four blades. 2.Create a sine equation for the height of a

    asked on April 25, 2016
  2. math

    fifteen less than four times seven

    asked on June 2, 2014
  3. Chemistry(difficult)

    A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of 206Pb per 1.185 g of 238U in the rock? The

    asked on May 3, 2015
  4. Chemistry

    Determine the average rate of change of B from t=0s to t=352s. A to 2B Time Concentration of A (M) 0 0.670 176 0.385 352 0.100

    asked on July 16, 2011
  5. Math

    The park had initially planned to charge $8 for admission and expected to have 2400 visitors a day. Allison and Juan were assigned the task of analyzing the park's admission revenues. 1.a)How much revenue would the park have for one day at the current

    asked on July 28, 2016
  6. Calculus

    find the exact value of sin 11pi/12 using the sum or difference formula.

    asked on July 19, 2011
  7. physics

    A long, vertical, straight wire carries a current I going upwards. The wire is perpendicular to the plane of a circular metal loop and passes through the center of the loop. The loop is allowed to fall and maintains its orientation with respect to the

    asked on July 28, 2010
  8. maths

    Millie, Josh and Libby receive a bonus at work. They are paid in the ratio of 2:3:4 Josh's share is £105. What was the total amount of the bonus before they shared it?

    asked on October 10, 2015
  9. math help plzzzz!!!!

    Multiple Choice 1. What is 0.32 written as a fraction in simplest form? (1 point) thirty-two over one hundred eight over twenty-five one hundred over thirty-two sixteen over twenty-five 2. If Fran’s fudge recipe calls for two and one-half cups of sugar

    asked on October 30, 2013
  10. Math (Please help)

    Macario is making 12 pounds of nut mixture with macadamia nuts and almonds. macadamia nuts cost $9 per pound and almonds cost $5.25 per pound. how many pounds of macadamia nuts and how many pounds of almonds should macario use for the mixture to cost $6.50

    asked on March 3, 2019
  11. Physics Please help3

    A point charge with charge q1 = 3.10μC is held stationary at the origin. A second point charge with charge q2 = -4.60μC moves from the point ( 0.160m , 0) to the point ( 0.270m , 0.255m ). How much work W is done by the electric force on the moving point

    asked on May 21, 2014
  12. physics

    A -4.0UC charge is located 0.45m to the left of a +6.0uc charge. what is the magnitude and direction of the electrostatic force on the positive charge?

    asked on March 8, 2012
  13. College Physics

    Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in a glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving with a speed vi. After the collision, the orange disk moves along a

    asked on May 18, 2011
  14. precalculus

    A bacteria culture initially contains 1500 bacteria and doubles every half hour. a) Find an expression for the number of bacteria after t hours. Q(t)= b) The number of bacteria after 20 minutes is (the answer must be an integer) c) The number of bacteria

    asked on March 2, 2011
  15. Chemistry

    Order in the increasing value of their polarity? HF NH3 H2O CO2 here i used the scale and got their numbers. HF>H2O>CO2>NH3 am i correct?

    asked on August 17, 2017
  16. calculus

    A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches.

    asked on January 8, 2017
  17. Physics

    Three boxes are lined up so that they are touching each other as shown in the figure below. Box A has a mass of 30.0 kg, box B has a mass of 45.0 kg, and box C has a mass of 75.0 kg. An external force (F) pushes on box A toward the right, and the force

    asked on November 20, 2016
  18. Algebra

    Three fourths of a number increased by 4 is at most 19

    asked on November 9, 2016
  19. Chemistry

    1. For the reaction 2N2O(g) ⇋ O2(g) + 2N2(g), what happens to the equilibrium position if the pressure decreases? A. Shift to the right B. Shift to the left C. Doubles D. Does nothing E. Halves 2. if an equilibrium reaction shifts to the right when the

    asked on October 16, 2012
  20. science help plzzz

    Multiple Choice 1. Which of Earth's spheres contains mountains, valleys, and other landscapes? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following are examples of destructive forces? (1 point) ice wind both ice and wind neither

    asked on January 22, 2014
  21. physiscs

    a 75w and 50 w incandescent light bulbs are designed fot use with the same voltage. what is the ratio of the resistance of the 75- w bulb to the resistance of the 50 w bulb?

    asked on March 8, 2012
  22. chemistry

    A certain reaction has a delta H= -75 kJ and an activation energy of 40 kJ. A catalyst is found that lowers the Activation energy of the forward reaction by 15 kJ. What is the activation energy of the reverse reaction in the presence of this same catalyst?

    asked on March 22, 2010
  23. math

    A man travels 12km due north, then 5km due east and then back to the starting point on a straight road. What is the total distance traveled?

    asked on May 24, 2017
  24. Chemistry I

    In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the

    asked on October 22, 2012
  25. Chemistry

    What is the ph of 2.5 M solution of HClO4?

    asked on July 20, 2011
  26. physics

    A stone is projected vertically upwards with a speed of 30ms from the top of a tower of height 50m. Neglecting air resistance determine the maximum height it reached from the ground.[g=10ms^2]

    asked on July 26, 2016
  27. Chemistry

    The estimated proven world oil reserves in 2013 were 1526 billion barrels. The world annual rate of use was 32.6 billion barrels. How long will these reserves last if this rate of use continues? (The rate of use is actually likely to increase.)

    asked on April 18, 2016
  28. please help me!! with this science!!!!!

    Multiple Choice 1. Which sphere of the Earth system contains all living organisms? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following statements best describes the geosphere? (1 point) the sphere that consists of solid rock

    asked on January 7, 2014
  29. Algebra

    Julie went to the post office and bought both $0.41 stamps and $0.26 postcards. She spent $51.40. The number of stamps was 20 more than twice the number of postcards. How many of each did she buy? I just want to know how to set it up.

    asked on March 3, 2019
  30. maths

    Rob is twice Joshua’s age. Nick is 5 years older than Joshua. The sum of all their ages is 45. How old is Nick?

    asked on September 7, 2018
  31. math

    Find the area of the region enclosed between y=2sin(x) and y=3cos(x) from x=0 to x=0.7π. Hint: Notice that this region consists of two parts.

    asked on April 27, 2019
  32. Physics

    In the figure below the left-hand cable has a tension T1 and makes an angle of 45 ◦ with the horizontal. The right-hand cable has a tension T3 and makes an angle of 48 ◦ with the horizontal. A W1 weight is on the left and a W2 weight is on the right.

    asked on September 27, 2015
  33. Physics

    A body A of a mass 0.16 kg exerts a force of 6.2x10^-10 N on a body B when the distance between their centers is 0.37 meters. What is the mass of body B?

    asked on August 22, 2014
  34. geometry

    The Polygon Angle-Sum Theorem states the following: The sum of the measures of the angles of an n-gon is ____. (1 point) (n – 1)180o (n – 2)180o 9. What is the measure of one angle in a regular 16-gon? (1 point) 2,520o 202.5o 157.5o 78.75o 10. The

    asked on December 31, 2012

    a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the

    asked on October 24, 2011
  36. Math

    Use Mathematical Induction to show that the statement 2 + 6 + 10 + . . . + (4n – 2) = 2n^2 is true

    asked on July 29, 2011
  37. Physics

    In the figure below the left hand calbe has a tension T1 and makes an angle of 42 with the horizontal. the right hand calbe as a tension T3 and makes an angle of 47 with the horizontal. The horizontal cable connecting the two masses has a tension of 37 N.

    asked on September 15, 2010
  38. Precalculus

    The bacteria in a 8-liter container double every 2 minutes. After 55 minutes the container is full. How long did it take to fill a quarter of the container?

    asked on April 13, 2011
  39. Physics

    A 50 kg box rests on a smooth frictionless table. Connected to the box is a light string passing through a pulley at the end of the table. Suspended on rhe other end of the string is a 20 kg box. Find a) acceleration of the system, b) the tension in the

    asked on August 19, 2014
  40. Calc Help Please Again Last one!

    Write out the form of the partial fraction decomposition of the function appearing in the integral: integral (6x-58)/(x^2+2x-63) Determine the numerical values of the coefficients, A and B, where A

    asked on May 16, 2014
  41. Help me with this math ms sue.

    Multiple Choice 1. Calculate the slant height for the given cone. Round to the nearest tenth. cone (1 point) 10.2 cm 11.4 cm 9.8 cm 12.0 cm 2. Calculate the slant height for the given cone. Round to the nearest tenth. cone (1 point) 11.2 cm 12.5 cm 14.8 cm

    asked on February 27, 2014
  42. math

    Is the relationship between the variables in the table direct variation, inverse variation, both, or neither? If it is a direct or inverse variation, write a function to follow it. X:2 5 20 40 Y:40 20 5 2 ANSWERS AVAILABLE TO CHOSE: A) NEITHER B) INVERSE

    asked on May 17, 2016
  43. science help plzzz

    1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave

    asked on January 17, 2014
  44. computer science

    a bank charges $10 per month plus the following check fees for a commercial checking account: $.10 each for fewer than 20 checks $.08 each for 20-39 checks $.06 each for 40-59 checks &.04 each for 60 or more checks write a program that asks for the number

    asked on March 10, 2010
  45. Physics

    A proton is at the origin and an electron is at the point x = 0.41 nm, y = 0.36 nm. Find the electric force on the proton. I got 7.529 *10^-11 but it wants the answer for fx and fy how do i get that?

    asked on August 6, 2009
  46. Math

    Matt and Chris leave their uncle’s house in Phoenix at the same time. Matt drives west on I-60 at a speed of 76 miles per hour. Chris drives east on I-60 at a speed of 82 miles per hour. How many hours will it take them to be 632 miles apart? Some how I

    asked on March 4, 2019
  47. Math

    . Vern sold his 1964 Ford Mustang for $55,000 and wants to invest the money to earn him 5.8% interest per year. He will put some of the money into Fund A that earns 3% per year and the rest in Fund B that earns 10% per year. How much should he invest into

    asked on March 4, 2019
  48. stats need help

    If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores will not be the same as the distribution of the original data. True or False?

    asked on July 6, 2017
  49. math

    How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment?

    asked on May 2, 2017
  50. Chemistry

    t takes 572 kJ of energy to decompose 2.00 mol of liquid water. How much energy does it take to decompose 54.0 mol of water? 2H2O(l)+572kJ→2H2(g)+O2(g)

    asked on April 18, 2016
  51. Chemistry Help Please

    1)how would the accuracy of your determined keq change if all your volume measurements were made with graduated cylinders rather than pipets ? 2) if all of the SCN^- was not converted completely to FeNCS^2+ when the calibration curve was prepared would

    asked on March 13, 2014
  52. Chemistry

    A solution of H2SO4 with a modal concentration 6.25m has a density of 1.300 g/ml. What is the molar concentration?

    asked on July 12, 2011
  53. Chemistry

    x+y=9.0 0.50x+0.20y=3.90 What is the value of x and y?

    asked on July 9, 2011
  54. Physics

    A 600-kg geosynchronous satellite has an orbital radious of 6.6 Earth radii. What gravitational force does Earth exert on the satellite?

    asked on January 31, 2011
  55. organic chem

    7. An unknown compound, C8H14, is optically active. Hydrogenation of the unknown yields 4-methylheptane. Ozonolysis of the unknown yields ethanol and 2- methylpropandial. Suggest a structure for the unknown consistent with the above date. please help

    asked on October 11, 2010
  56. physics

    A step-down transformer has a turns ratio of 1:10 and its primary is connected across the terminals of a standard 120 V wall socket. A 330 ohm resistor is connected across the secondary of this transformer. What power P is dissipated in the resistor?

    asked on July 28, 2010
  57. algebra

    In a card game player get at the start 2 green cards, 3 blue cards, 4 red cards, and 3 yellow cards. In how many ways can the player get cards at the start if this card game has 7 green, 7 blue, 10 red and 10 yellow cards?

    asked on May 12, 2019
  58. Physics

    A ball is dropped from a roof of a building and strikes the ground in 3 seconds. If a second ball is thrown horizontally from the roof, it will hit the ground in:

    asked on September 11, 2014
  59. math

    a square photo display is made up of 60 rows of 60 photos each. the area of each square photo is 4 square inches. how long is each side of the display board?

    asked on September 4, 2014

    4. For the pair of similar solids, find the value of the variable. cylinders (1 point) 3 cm 18 cm 16 cm** 2 cm 5. For the pair of similar solids, find the value of the variable. pyramids (1 point) 12 mm 48 mm** 20 mm 3 mm ARE THESE CORRECT?

    asked on March 12, 2014
  61. Science help ms sue.

    Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements

    asked on February 25, 2014
  62. math

    A ladybug crawls around the outside of a rectangle that measures 5.5 cm by 8.5 cm. The ladybug stays exactly 3.5 cm from the rectangle at all times to form a larger figure.

    asked on November 24, 2013
  63. Trig

    sin^4t-cos^4t/sin^2t cos^2t= sec^2t-csc^2t i have =(sin^2t+cos^2t)(sin^2t+cos^2t)/sin^2tcos^2t then do i go =(sin^2t+cos^2t)/sin^2tcos^2t stumped

    asked on April 19, 2012

    What is this poem's meaning and how did you understand it? March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And

    asked on April 12, 2012
  65. math

    the edges of 3 cubes are consecutive odd intergers. if the cubes aer stacked on a desk as shown, the total exposed surface area is 381. find the lenths of the sides of the cubes thanks!!

    asked on March 21, 2011
  66. Social Studies

    How can a free press hold the government accountable? opinion panels** b.offering prior restraint c.accessing classified info d.summarizing government actions

    asked on May 31, 2017
  67. word problems

    In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646

    asked on March 26, 2017
  68. Math

    In a Canadian Football League game, the path at one particular kick-off can be modelled using tge function h(d)=-0.02d^2+2.6d-66.5,where h is the height of the ball and d is the horizontal distance from the kicking team's goal line,both in yards. A value

    asked on March 6, 2017
  69. Chemistry

    Burning 2.00 mol of hydrogen releases 483.6 kJ of energy. Determine how much energy, in kilojoules, must be supplied to convert 5.00 mol of water vapor into hydrogen gas and oxygen gas.

    asked on April 18, 2016
  70. Math

    Find how much interest $25,000 earns in 4 years in a certificate of deposit paying 8.5% interest compounded quarterly.

    asked on September 13, 2014
  71. Please help with Calc!

    Evaluate the indefinite integral. integral 2e^(2x)sin(e^2x) Note: Use an upper-case "C" for the constant of integration.

    asked on May 3, 2014
  72. Math (2 Questions) - Please Help

    A cube has 8 vertices, 12 edges, and 6 square faces. A soccer ball (also known as a buckyball or truncated icosahedron) has 12 pentagonal faces and 20 hexagonal faces. How many vertices and how many edges does a soccer ball have? A circular table is placed

    asked on April 16, 2014
  73. Language arts help!!

    1–6, read the play excerpt below and answer the questions that follow. Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and

    asked on March 20, 2014
  74. Physics

    Two uniform solid spheres have the same mass of 3 kg, but one has a radius of 0.25 m while the other has a radius of 0.8 m. Each can rotate about an axis through its center. (a) What is the magnitude τ of the torque required to bring the smaller sphere

    asked on January 11, 2014
  75. science help plzzz

    Multiple Choice 1. Which of the following images shows a living organism interacting with a biotic factor in its environment? (1 point) bird drinking water koala eating leaves plant in the Earth whale in the ocean 2. Which of the following shows the

    asked on November 7, 2013
  76. Can someone please help me with this history!!!!!!

    Multiple Choice 1. Which of the following statements describes the most common experience of Native Americans after encountering Europeans for the first time? (1 point) Native Americans thought the settlers had nothing to offer them in trade or knowledge.

    asked on November 3, 2013
  77. science

    In a dream you're in a car traveling at 50 km/h and you bump into another car traveling toward you at 48 km/h. The speed of impact is

    asked on October 26, 2013
  78. statistics

    the distribution of scores on a test is mound shaped and dsymmetric with a mean score of 78. if 68 percent of the scores fall between 72 and 84, what is the stand deviaition

    asked on January 31, 2012
  79. algebra 1

    The midpoint of XY is point M(-12,5). If the coordinates of X are (3,-3), what are the coordinates of Y?

    asked on January 4, 2012
  80. 3rd grade shurley english

    what does s, f,scs, scv mean when indentifying(labeling) sentences thanks

    asked on October 26, 2010
  81. Applied Calculus

    In August 2013, Ally Bank was offering 0.16% interest on its Online Savings Account, with interest reinvested daily. Assuming that this rate of return continued for 8 years, how much was would a deposit of $4000 in August 2013 be worth in August 2021?

    asked on September 2, 2019
  82. algebra

    Solve using elimination. 2x + 6y = 6 2x + 3y = 12

    asked on June 12, 2019
  83. Math

    Nataly is considering two job offers. The first job would pay her $83,000 per year. The second would pay her $66,500 plus 15% of her total sales. What would her total sales need to be for her salary on the second offer be higher than the first?

    asked on March 11, 2019
  84. English

    Which statement is NOT true about sentence fragments? A. They do not have a subject, but they have a predicate. B. They do not have a subject and a verb. C. They do not form a complete thought. D. Adding other words makes the fragment a complete sentence.

    asked on September 17, 2018
  85. Algebra

    The path of a diver is given by y=-4/9 x^2 + 24/9x +12 where y is the height (in feet) and x is the horizontal distance from the end of the diving board (in feet). What is the maximum height of the diver?

    asked on September 29, 2015
  86. Math (Trig)

    Rewrite the following expression in terms of tan3x: (sin2x + sin4x)/(cos2x + cos4x)

    asked on September 29, 2014
  87. MATH

    The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=-4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1

    asked on March 8, 2014
  88. Physics

    Which statements about traveling waves are TRUE? Choose all that apply. a) A traveling wave transfers energy from one point to another. b) A speaker that beams its sound forward into a small area produces a louder sound. c) The rate at which a wave

    asked on February 22, 2014
  89. history help plzzzzzz

    1. What was the Trail of Tears? (1 point) the nickname given to Manifest Destiny by many Native Americans the battlefield where thousands of Cherokees were killed defending their home territory the path walked by Native Americans as they were forced to

    asked on January 29, 2014
  90. please help me!! with this science!!!!!

    Multiple Choice: 1. If a kestrel eats a mouse that eats grass, the kestrel is a (1 point) producer. second-level consumer. first-level consumer. decomposer. 2. Which of the following best explains why a species of lizard is able to live in the desert but

    asked on December 11, 2013
  91. algebra

    write the expression that represents the total length of each segment. .__x____.____9_____.

    asked on September 19, 2013
  92. trig

    TRIG Identities, Gr. 12: Prove: cot4x=1-tan^2x/2tan2x

    asked on May 23, 2013
  93. chemistry

    copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate

    asked on March 7, 2013
  94. Algebra 2

    Objective Function: C = 6x – 4y

    asked on March 5, 2013
  95. english

    What is a personification expression for hands on a clock?

    asked on February 26, 2013
  96. statistics

    In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences?

    asked on June 28, 2012
  97. Pre Calculus

    find all solutions of the equation 1. x^3+27=0 2. x^3-8=0

    asked on November 21, 2011
  98. Chem

    A lake may be polluted with Pb2+ ions. what precipitation reaction might you use to test for the presense of Pb2+?

    asked on October 9, 2011
  99. Chemistry

    1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe? 2.As a solid Fe adopts a body centered cubic unit cell. What is the volume of a unit cell of this metal? 3.What is the edge length of a unit cell of Fe?

    asked on July 9, 2011
  100. Chemistry

    Suppose that a 10-mL sample of a solution is to be tested for Cl- ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 . What is the minimum number of grams of Cl- that must be present in order for AgCl(s) to form?

    asked on November 20, 2010


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