Popular questions and responses by jojo
  1. chem 111

    What is the molarity of a solution of 10.0% by mass cadmium sulfate, CdSO4 (molar mass = 208.46 g/mol) by mass? The density of the solution is 1.10 g/mL.

    asked on August 26, 2008
  2. Calculus/Math

    The slope field for a differential equation is shown in the figure. Determine the general solution of this equation. The slope field has positive slopes in quadrants 2 and 4 and negative slopes in quadrants 1 and 4. It looks like a circle and at (0,0) it

    asked on March 10, 2020
  3. Linear Approximation

    Use linear approximation, i.e. the tangent line, to approximate 1/0.104 as follows: Let f(x)=1/x and find the equation of the tangent line to f(x) at a "nice" point near 0.104 . Then use this to approximate 1/0.104 . L(x)=f(a)+f'(a)(x-a)...i think. You're

    asked on October 14, 2006
  4. math

    While working on the roof of his house, John leans a 15 foot ladder against a second story window. If the distance on the ground between the base of the ladder and the house is nine feet, at what height does the ladder reach the second story window? In

    asked on February 8, 2017
  5. algebra

    a building in a city has a rectangular base. the lenght of the base measures 70 ft less than twice the width. the perimeter of this base is 820 ft.

    asked on January 23, 2012
  6. physics

    When a driver presses the brake pedal, his car stops with an acceleration of -8.7 m/s2. How far will the car travel while coming to a complete stop if its initial speed was 10 m/s?

    asked on June 11, 2015
  7. physics 1

    The base of a pyramid covers an area of 13.0 acres (1 acre = 43,560 ft2) and has a height of 481 ft. If the volume of a pyramid is given by the expression V = (1/3)bh, where b is the area of the base and h is the height, find the volume of this pyramid in

    asked on January 21, 2016
  8. gtuc


    asked on February 26, 2016
  9. English

    In "Shall I Compare Thee to a Summer's Day", what is an example of personification?

    asked on November 29, 2009
  10. Stat

    when you are comparing two sets of data, and one set is strongly skewed and the other is symmetric, which measures of the center and variation should you choose for the comparison?

    asked on September 14, 2014
  11. Chemistry

    17. You have the following equations: 2S (s) + 3O2 (g) 2SO3 (g), H = 792 kJ 2S (s) + 2O2 (g) 2SO2 (g), H = ? 2SO2 (g) + O2 (g) 2SO3 (g), H = 198 kJ What is the missing H?

    asked on April 10, 2012
  12. chemistry

    The vapor pressure of ethanol is 54.68 mm Hg at 25oC. How many grams of chlorophyll , C55H72MgN4O5, a nonvolatile, nonelectrolyte (MW = 893.5 g/mol), must be added to 207.6 grams of ethanol to reduce the vapor pressure to 53.60 mm Hg ? ethanol = CH3CH2OH =

    asked on August 26, 2014
  13. Texas State History

    which of the following best characterizes interest groups in texas? A)The Texas Ethics Commission police interest groups to sop bribery disguised as campaign contributions B)Interest groups in Texas have very little influence on decisions made by texas

    asked on April 16, 2020
  14. physics

    A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the

    asked on April 2, 2016
  15. physics

    A centrifuge in a medical laboratory rotates at an angular speed of 3,550 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.

    asked on March 25, 2016
  16. physics

    A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 205 mi/h in 2.70 s. (a) Find the average acceleration of the plane. (b) Assuming the acceleration is constant, find the distance the plane moves.

    asked on January 31, 2016

    1- the vinegar soltion sold in the store is about 5% acetic acid. Assuming that the solution has a density of 1.01 g/mL, calculate the pH of vinegar.

    asked on May 20, 2013
  18. English

    We laughed at the colorful ball. Is this sentence structurally ambiguous?

    asked on February 8, 2012
  19. physics

    A playground merry-go-round of radius 2.00 m has a moment of inertia I = 255 kg·m2 and is rotating about a frictionless vertical axle. As a child of mass 25.0 kg stands at a distance of 1.00 m from the axle, the system (merry-go-round and child) rotates

    asked on April 2, 2016
  20. physics

    The system of small objects shown in the figure below is rotating at an angular speed of 2.0 rev/s. The objects are connected by light, flexible spokes that can be lengthened or shortened. What is the new angular speed if the spokes are shortened to 0.15

    asked on April 2, 2016
  21. physics

    A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is ¦Ì = 0.34. Once the ball begins to roll

    asked on March 18, 2013
  22. chemistry

    If there are 80 milligrams of a radioactive element decays to 10 milligrams in 30 minutes then what is the elements half life in minutes? Ok i narrowed it down to either 10 or 30...but im rly confused so if u could help it wuld be grea 80 40 1 min 20 2 min

    asked on March 4, 2007
  23. chemistry

    The partial pressure of O2 in your lungs varies from 25 mm Hg to 40 mm Hg. What mass of O2 can dissolve in 1.0L OF water at 25.0oC when the O2 partial pressure is 40. mm Hg?

    asked on August 24, 2014
  24. math

    Certain investments compound interest at different intervals. What effect does the size of the compounding interval have on the yield of the investment?

    asked on June 30, 2014
  25. chemistry

    nitrosyl bromide, NOBr is formed from NO and Br2-. Experiments show that this reaction is second order in NO and first order in Br2. what is the rate equation for this reaction?

    asked on September 3, 2014
  26. Chemistry

    12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed? q = mCHf I am having a lot of trouble on this type of problem in chem. Help and an explanation would be greatly appreciated. Thank you.

    asked on April 10, 2012
  27. math

    Find the largest angle for which sine and tangent agree to within two significant figures. Please explain ^_^

    asked on August 28, 2009
  28. Maths

    Tan theta = 5/12 find the value of cosec theta

    asked on May 18, 2019
  29. Math

    Marcus bake loaf of bread of banana bread for a party he cut the loaf into equal size . At the end of the party there were 6 pieces left . Explain how you can find the number of pieces in the whole loaf if Marcus told 1/3 of the loaf was left

    asked on March 10, 2017
  30. physics

    In a circus performance, a large 5.0 kg hoop of radius 3.0 m rolls without slipping. If the hoop is given an angular speed of 3.0 rad/s while rolling on the horizontal and allowed to roll up a ramp inclined at 10° with the horizontal, how far (measured

    asked on April 2, 2016
  31. Math PLZZZ HELPP MEE!!!

    the area of the parallelogram. Quadrilateral top: 5 cm side: 14 cm length: 12 cm *38 cm2 *60 cm2 •• *70 cm2 *168 cm2 3. Find the perimeter of the parallelogram. Quadrilateral top: 10.8 ft side: 5.1 ft length: 2.3 ft *15.9 ft *24.84 ft *31.8 ft ••

    asked on February 17, 2016
  32. geometry

    Adelina is creating a piece of art that is in the shape of a parallelogram. its dimensions are 35 inches by 28 inches and one angle is 80 degrees. find the lengths of both diagonals.

    asked on February 21, 2012
  33. math b

    the vertices of triangle ABC are A(-2,3), B(0,-3), and C(4,1). prove, by means of coordinate geometry, that the median to side BC is also the altitude to side BC.

    asked on May 25, 2009
  34. science-biology

    name two processes for which DNA is responsible for what are the three components to a DNA nucleotide

    asked on March 19, 2009
  35. math b

    solve each system of equation algebraically: x2+y2=18 x+y=4

    asked on March 5, 2009
  36. Pre-Calculus

    Assume two radar stations that are 25 miles apart are both tracking a plane. At a given moment, the angle between Station 1 and the plane is 73 °, while the angle between Station 2 and the plane is 46 °. How far is the plane from Station 2?

    asked on April 28, 2020
  37. Social Studies

    The principle of _____ in the U.S. Constitution means that the power of each branch of government is limited by powers of other branches. The principle of _____ means that power is distributed between state and national governments. PLEASE HELP ME!!!!!!

    asked on April 22, 2019
  38. physics

    A person bending forward to lift a load "with his back" (Figure (a)) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force

    asked on April 2, 2016
  39. physics

    A rotating wheel requires 6.00 s to rotate 27.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 97.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel?

    asked on March 25, 2016
  40. Math HELPP!!

    Eric Drew and up to's triangle. Which of the following could be true for Eric's triangle. A: all three angles have equal measures B: possible angle measures of the triangle are 92, 48, and 40•• C: two of the angles are equal, and the third angle has a

    asked on February 16, 2016
  41. physics

    A jet plane lands with a speed of 81 m/s and can accelerate at a maximum rate of −5.00 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? (b) Can this plane land on a

    asked on January 31, 2016
  42. trigonometry

    solve for equation x(give answer in radians using exact values only. 2sin(x)+cot(x)-csc(x)=0

    asked on October 24, 2015
  43. Chemistry

    1. What would be the effect on the reaction rate if the [O2] were doubled? 2. What would be the effect on the reaction rate if the pressure on the reaction were doubled? 3. Assume the reaction is reversible and at equilibrium. What shifts in the

    asked on March 25, 2015
  44. English

    Write a paragraph in which you compare and contrast the motivations of Brutus and Cassius, and determine whether the ends justify the means. ("The ends justify the means" is simply saying that the good results, or "ends," make it acceptable, or

    asked on October 28, 2014
  45. Stat

    1) one indicator of a outlier is that an observation is more than 2.5 standard deviations from the mean. Consider the data value 80. (a) if a data set has mean 70 and standard deviation 5, is 80 a suspect outlier? be sure to work that explains your answer

    asked on September 14, 2014
  46. chem

    at a depth of 100m underwater the water pressure is equal to 10 atm of pressure. what is the partial pressure of N2 at a pressure of 10 atm?

    asked on August 25, 2014
  47. chemistry

    A 35.0g sample of ethylene glycol is dissolved in 500.0g of water. The vapor pressure of water at 32C is equal to 35.7mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32C?

    asked on August 24, 2014
  48. stoichiometry

    what is the mole ratio of oxygen to water

    asked on May 7, 2013
  49. Help please!!health

    After a meal at a child care center ,the left over hot food that has been in serving bowls that have been on the table should be: a.chilled, refrigerated and used at another meal b.reheated, cooled and frozen for later use c.discarded d.heated in a

    asked on December 13, 2012
  50. math

    explain how you would write the number that is 2 tens more than 53?

    asked on September 27, 2012
  51. Chemistry

    16. You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H values? H2 = (H1)(H3)/(H4) H2 = H4 (H1 + H3) H2 = H1 + H3 + H4 H2 = H1 + H3 H4

    asked on April 10, 2012
  52. Chemistry

    Calcium carbonate decomposes on heating producing potassium nitrate and oxygen. Write a balanced equation for this reaction. Heating 100g of pure potasium nitrae what mass of potassium nitrate would be produced?

    asked on March 21, 2012
  53. Math

    Julie owns a video store. Her monthlyexpenses, including rent, average $1,185. This year she made $34,620 in revenue. What is the difference between her average monthly revenue and her average monthly expenses? HELP

    asked on April 29, 2011
  54. math

    10. $10.00-$5.46 11. 36,024 - 15,539 12. 43,675 + 52,059 19. 3.75 + 2.5 + 04 20. 42.25-7.5

    asked on November 4, 2010
  55. math

    whrit for multiplication/division facts using the numbers 3, 8, and 24. 5.what are the seven months of the year that have 31 days? 6. find the eughth multiple of six. then add one. what is the square root of the answer? 8. in the 2004 presidentail

    asked on November 4, 2010
  56. math

    jenna wants to purchase a pad of drawing paper for $5.00, a charcoal pencil for $0.75, and an eraser for $1.25. how much money doses she need altogether to buy the supplies

    asked on September 13, 2010
  57. Fundamentals of Electricity

    The box-like Gaussian surface of Fig. 1 encloses a net charge of +24.0ε0 C and lies in an electric field given by N/C, with x and z in meters and b a constant. The bottom face is in the xz plane; the top face is in the horizontal plane passing through y2

    asked on November 30, 2009
  58. pre-algebra

    The perimeter of a triangle is 195 mm.If the lengths of the sides are consecutive odd integers,find the length of each side. what steps do i need to do in order to get the answre? Perimeter= L + L+2 + L+4 solve for L. That is the short side. THen add two

    asked on January 27, 2007
  59. math

    How long will it take a bird traveling at an average speed of 12 mph to travel 202 miles while flying south for the winter

    asked on May 6, 2020
  60. English

    I need some help with analogies Maple: ____ :: Fir : evergreen Poet:________ :: musician: concert Ultrasonic: sound :: _______: lights joints: inflamed :: _______: atrophy control: order :: anarchy: ________ movie: _____ :: sculpture : vending Thks!!!

    asked on March 12, 2020
  61. Math

    7 pt 1 c + 4 pt 1 c =?

    asked on December 16, 2019
  62. American History

    What space programs during the Ford administration fostered positive relations between the United States and the Soviet Union? A. Project Orion B. Apollo Zouyos Test C. Venera Project D. Vostok Program I know it's not the last two...

    asked on August 1, 2019
  63. Physics

    A 51.2-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.99 m/s. Her hands are in contact with the wall for 1.20 s. Ignore friction and wind resistance. Find the average force

    asked on July 26, 2019
  64. Social Studies

    1. A photograph shows a multiple-story stone building with several tall openings. It shows that the openings have rounded top edges, and that they are framed by pillars. Which elements of this building reflect architectural developments during the

    asked on February 11, 2019
  65. math

    Multiplying 2.1 and the number r results in 6.174. What is the value of r? Drag and drop the correct number into the box so that the equation is true.

    asked on January 8, 2019
  66. science

    how do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?

    asked on December 5, 2018
  67. Algebra 1

    How do I find a, b, c, and d, for cubic equations in word problems.

    asked on May 17, 2018
  68. algebra

    which ordered pair is a solution to the equation y=-5x+4 A.(2,14) B.(5,-29) C.(3,-19) D.(5,-21)

    asked on November 9, 2017
  69. Science

    PLEASE HELP ITS URGENT contact lenses improve your lives. contact lenses are example of an______? A.skeptical B.experiment C.invention D.evidence E.inference F.prototype G.biased I.hypothesis

    asked on November 7, 2017
  70. algebra

    solve 3/2x-4=16 A.x=20 B.x=13 1/3 B.x=15 1/3 D.30 I got 40/30 but thats not one of the answers

    asked on November 6, 2017
  71. algebra

    Determine the orderd pair is a solution y=x + 2/7 A.(0,0) B.(-1,2/5) C.(1,2/5)*** D.(2,2 2/5)

    asked on November 6, 2017
  72. algebra

    PLEASE HELP ITS URGENT Pizza costs $1.50 per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost.

    asked on November 6, 2017
  73. algebra

    Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation is true or false. am i right?

    asked on November 6, 2017
  74. algebra

    Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation is true or false. am i right?

    asked on November 6, 2017
  75. history

    What is the mayflower compact? A. a long-term treaty for trade routes with the duch tea company B. a formal method to establish systematic order on the pilgrams C. an economic agreement to freely make and sell goods to the british D. a formal agreement by

    asked on November 3, 2017
  76. history

    French took the lead in colonizing the upper Midwest region. From the early 16th century on, French soldiers, missionaries and fur traders left their slight mark upon the St. Lawrence Valley, the upper Great Lakes and points west. For the early French

    asked on November 3, 2017
  77. history

    How were the Spanish able to conquer two great empires with only a handful of soldiers? First, the Spanish had superior military equipment. They were protected by steel armor and had guns. The Aztecs and Incas relied on clubs, bows and arrows, and spears.

    asked on November 2, 2017
  78. Science

    How should I prepare for a field study and what should I do if there's an accident?

    asked on November 1, 2017
  79. Science

    What do safty symbols look like? What do they mean? provide at least three examples.

    asked on November 1, 2017
  80. algebra

    Is -7+9 = -9+7 A. true B. False C. Open

    asked on October 31, 2017
  81. Language Arts

    How do you know squeaky won't let gretchen win in Raymond's Run

    asked on September 27, 2017
  82. pre algebra

    Given w+10 what is the answer to w+(w-12/2 square *3)*7

    asked on September 17, 2017
  83. Social studies

    Which answer choice lists all of the common nouns in the following sentence? A few days before the race, Squeaky met the girls on the street. (1 point) days, race, Squeaky days, race, street days, race, Squeaky, girls days, race, girls, street••

    asked on May 23, 2017
  84. Chemistry

    8) ( 1 point) What is the maximum number of grams PH₃ that can be formed when 3.4 g of phosphorus reacts with 4 grams of hydrogen to form PH₃? P₄ (g) +6H₂ (g) → 4PH₃ (g) * 3.7 g 6.8 g 45 g 270 g 10. Lead nitrate can be decomposed by heating.

    asked on March 23, 2017
  85. Algebra 2

    Evaluate the function when x=1. f(x)=4x-2. Write the input and output as a set of ordered pairs, and identify the domain and range of the ordered pair. (6 points) Ordered Pair: Domain: Range: Write an equation of direct variation that passes through the

    asked on December 3, 2016
  86. American History

    Check my answers? 1. In what way was the government of ancient Athens different from the united states A) Athens was a direct democracy in which citizens ** B) Athens was an oligarchy ruled by the wealthy members of the council of five hundred C) Athens

    asked on October 17, 2016
  87. Physical Science

    A man jogs 8 km/h for 5 hours. How far did the man jog?

    asked on September 20, 2016
  88. Algebra

    2a raised to 2 - 4b raised to 3 - 8c raised to 4 divided by 2abc

    asked on May 27, 2016
  89. physics

    A 3.25-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 6.60 m/s. (a) Find the tension in the upper string. N (b) Find the tension in the lower string. N

    asked on March 28, 2016
  90. physics

    In a popular amusement park ride, a rotating cylinder of radius R = 3.10 m is set in rotation at an angular speed of 4.20 rad/s, as in the figure shown below. The floor then drops away, leaving the riders suspended against the wall in a vertical position.

    asked on March 25, 2016
  91. physics

    Suppose a 1800-kg car passes over a bump in a roadway that follows the arc of a circle of radius 18.4 m as in the figure shown below. (a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 9.24

    asked on March 25, 2016
  92. physics

    An air puck of mass m1 = 0.24 kg is tied to a string and allowed to revolve in a circle of radius R = 1.4 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m2 = 1.3 kg is tied

    asked on March 25, 2016
  93. pysics

    A 50.0-kg child stands at the rim of a merry-go-round of radius 1.65 m, rotating with an angular speed of 3.00 rad/s. (a) What is the child's centripetal acceleration? m/s2 (b) What is the minimum force between her feet and the floor of the carousel that

    asked on March 25, 2016
  94. Physics

    A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2

    asked on March 13, 2016
  95. Physics

    A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

    asked on March 13, 2016
  96. geometry

    Two overlapping identical circles have radii of 6.17. The area of their overlapping sections is 42.7. How far apart are the centers of the circles? Answer is 6.55

    asked on February 28, 2016
  97. geometry

    Two persons each hold the end of a 20 ft long jumping rope. How far apart should they stand if they hold the rope 4.5 ft off the ground, and the middle of the rope just touches the ground? Assume the arc formed by the jumping rope is circular. I know that

    asked on February 27, 2016
  98. Art

    Which traits is not symbolized by chinese dragons? Wisdom Benevolence Evil Adaptability •• Correct me

    asked on February 17, 2016
  99. Art

    according to egyptian mythology horus son Kebehsenuef fit who has the head of a hawk. what characteristic might make Kebehsenuef fit for the job of watching a dead mummy vital organs? A kind and caring heart The keen eyes of a bird of pray •• Ingenuity

    asked on February 17, 2016
  100. Math PLZZ HELP ME!!

    Can someone please explain me how to construct a perpendicular bisector!

    asked on February 16, 2016


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