Most popular questions and responses by emily
  1. first additional language

    how did youth day came?

    asked on May 19, 2013
  2. Chemistry

    Write a balanced net ionic equation (include physical states) for the following reaction: Fe(NO3)3(aq) + LiOH(aq) → LiNO3(aq) + Fe(OH)3(s)

    asked on June 27, 2011
  3. Math

    Jill said that an angle is made of any two rays. Is she correct? Explain

    asked on April 8, 2015
  4. Honors Chemistry

    "How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol N2/14.0 g N2) x (2 mol NH3/1 mol N2) x ( 17.0 g NH3/ 1 mol NH3) = 68 g NH3 25 g H2 x ( 1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x

    asked on November 8, 2009
  5. Physics

    Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s. What is the net force acting on the body?

    asked on January 25, 2012
  6. Physics (check)

    A merchant in Katmandu sells you a solid gold 1-kg statue for a very reasonable price. When you get home, you wonder whether or not you got a bargain, so you lower the statue into a measuring cup and measure its volume. What volume will verify that it's

    asked on May 18, 2008
  7. English

    According to the speaker in "Mending Wall" by Robert Frost, why does the neighbor feel that good walls make good neighbors? A. They create a barrier from having to talk to one another often. B. They maintain privacy and prevent meddling. C. They physically

    asked on January 26, 2017
  8. chemistry

    If I use 0.524g of Mg to react with 60.0mL of 1.0M H+. The density of H+ is 1.00 g/mL, and the specific heat capacity equals what water's is. The Final and Initial temp. are 65.8 and 22. Mg(s) + 2H+(aq) ----> Mg2+(aq) + H2(g) so to find the deltaH of this

    asked on March 22, 2011
  9. Chemistry

    Consider the following hypothetical aqueous reaction: A (aq)-->B(aq)}. A flask is charged with 0.065 (mole) of A in a total volume of 100.0 (mL}. The following data are collected: Time (min) 0 10 20 30 40 Moles of A .065 .051 .042 .035 .031 Calculate the

    asked on February 9, 2012
  10. English

    Can someone help me with this? Thank you! Prompt A: Compare and contrast the topics and themes of writers from the Americas and European writers. Include specific examples to support your statements.

    asked on December 4, 2014
  11. Reading Skills

    This question is based on the following information about The Call of the Wild, a book by Jack London. The Call of the Wild is a story about a dog named Buck. Buck is a pampered dog who lives with a wealthy family in southern California. During the Gold

    asked on April 2, 2014
  12. science

    A simple model for a person running a 100m race is to assume the sprinter runs with constant acceleration until reaching top speed, and then maintains that speed through the finish line. If a sprinter reaches their top speed of 11.2ms-1 in 2.15s, what will

    asked on September 4, 2012
  13. Calc BC

    Figure out the 35th derivative for xsinx. You have to do a few derivatives by hand to figure our a pattern and then predict the 35th one

    asked on September 11, 2013
  14. Calculus

    A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. An industrial tank of this shape must have a volume of 1600 cubic feet. The hemispherical ends cost twice as much per square foot of surface area as the sides. Find

    asked on November 3, 2016
  15. American Government

    As the country has grown and evolved, so too has the Executive Office of the President and the independent agencies. Give FOUR specific examples demonstrating how the evolution of the executive branch has mirrored the evolution of the nation. Include at

    asked on March 18, 2017
  16. Chemistry

    What is the molality of a solution of water and KCl if the boiling point of the solution is 103.07°C? (K subscript b equals 0.512 degrees C/m solution; KCl is an ionic compound right parenthesis A: .300 B: .600 C: 3.00 D: 6.00 I'm really confused as to

    asked on February 10, 2017
  17. Physics

    This is how the problem starts out: A meter stick is placed with the fulcrum at the 50-cm mark. If a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system? I thought that since

    asked on December 6, 2007
  18. calculus

    I needed help with these FRQ in my APCalc course. Any help or walkthrough would be extremely helpful - thanks in advance. Let f be the function given by f(x)=3ln((x^2)+2)-2x with the domain [-2,4]. (a) Find the coordinate of each relative maximum point and

    asked on December 1, 2014
  19. Physics

    According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal

    asked on January 13, 2013
  20. physics

    a 75 kg person escapes from a burning building by jumping from a window 30 m above a catching net. Acceleration due to gravity is 9.81 m/s^2. Assuming air resistance is simply a constant 96 N force on the person during the fall, determine the person's

    asked on October 11, 2011
  21. poem by E.E. Cummings

    Can someone help me figure out what the meaning of this poem is? It's called "in Just-" and it confuses me. in Just- spring when the world is mud- luscious the little lame balloonman whistles far and wee and eddieandbill come running from marbles and

    asked on January 21, 2008
  22. Chemistry

    A sample of argon gas at STP occupies 56.2 liters. Find the number of moles of argon and the mass in the sample

    asked on April 27, 2013
  23. Sport

    Why Olympia selected to hold at the ancient Olympic Games?

    asked on November 9, 2011
  24. Math grade 12

    A lighthouse with a rotating beam is located 500m south of a coastal cliff that runs west to east a) determine a relation for the distance from the lighthouse to the point the light strikes the cliff in terms of the angle of rotation x b) determine an

    asked on November 5, 2015
  25. Math

    Determine the equation of the parabola with roots 2+sqrt(3) and 2-sqrt(3), and passing through the point (2,5).

    asked on August 23, 2010
  26. Math

    C:\Users\Owner\Pictures\Graph.png Each square on this graph paper is 1/4 Scale: 1/4 inch = 18 inches What are the actual dimensions of the sofa in inches? a. 90x45 b. 90x36 c. 75x25 d. 80x30

    asked on November 15, 2013
  27. chemistry

    addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl

    asked on March 13, 2011
  28. analytical chemistry

    blank is used to dissipate the error brought about by impurities. What is the other reason of using blank in Mohr method?

    asked on November 5, 2010
  29. College Math - Quantitative Reasoning

    Hello, I could really use some help with this problem. If the national economy shrank at an annual rate of 7​% per year for three consecutive​ years, then the economy shrank by 21​% over the three​-year period. - Of course, I understand 7% would be

    asked on January 16, 2017
  30. Chem

    The titration of 25.0 mL of an iron(II) solution required 18.0 mL of a 0.265 M solution of dichromate to reach the equivalence point. What is the molarity of the iron(II) solution?

    asked on September 30, 2015
  31. Science

    Study the scenario. An object is at rest. At five seconds, someone comes over and pushes the object with a force of 3 N to the right. Which of the following choices describes the force needed to keep the object in static equilibrium? a. A force of 3 N to

    asked on September 12, 2018
  32. Chemistry

    if i place C6H14 and KI in a test tube, then some metal salt (MNO3) is added... If the M+ reacts with and oxidizes the I, What color is c6h14? I think its purple.. but im not sure why it would be that color .. :S .. care to explain please ? and if it

    asked on March 29, 2011
  33. art/history

    which of the following is not an element of baroque or rococo architecture a movement b columns c ornamentation d minimalism

    asked on November 16, 2016
  34. Physics

    Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

    asked on July 10, 2011
  35. Geometry probability

    Betty picks 4 random marbles from a bowl containing 3 white, 4 yellow, and 5 blue marbles. The probability that exactly 1 of the 4 marbles drawn is blue is _____ (I know that the probability is 5/12 and that simplifies to 0.4166 but that is not one of the

    asked on January 24, 2017
  36. physics

    A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A)

    asked on November 28, 2010
  37. Physics

    A 80.0 N box of is pulled 20.0 m up a 30.0 Degree ramp by a force of 115 N, if the coefficient of kinetic friction between the box and the ramp is .22 what is the box's kinetic energy?

    asked on February 14, 2012
  38. Math

    In parallelogram DEFG m

    asked on April 12, 2011
  39. Language arts

    1. reflect on the feedback you received from WriteToLearn about your autobiographical Narrative. (4 points) Which traits are strongest in your autobiographical narrative: ideas, organization, voice, word, choice, sentence fluency, or conversations? Provide

    asked on September 25, 2018
  40. Chemistry

    net ionic equation of Na2CO3+2HC2H3O2-->CO2+h2o+2Na2H3O2

    asked on September 1, 2010
  41. math

    Okay. So i'm doing this project for my geometry class about different sports, soccer, baseball, basketball, bowling, golf, volleyball and pool. I have to find the surface area, volume, diameter, circumference, and radius of each of the balls. I got a

    asked on May 23, 2007
  42. French

    Is the word 'maths' masculine or feminine?

    asked on September 29, 2008
  43. Calc

    A buoy oscillates in simple harmonic motion as waves go by. The buoy moves a total of 3.5 feet from its low point to its high point and it returns to its high point every 10 seconds. What is the equation that describes this motion if it reaches its high

    asked on July 30, 2008
  44. Physics

    A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine fires a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of

    asked on December 2, 2012
  45. Physics

    Why is Young's experiment more effective with slits than with the pinholes he first used?

    asked on March 22, 2008
  46. Chemistry

    What will be the freezing point of a solution made by dissolving 5.25 g of naphthalene (C10H8) in 100.0 g benzene (C6H6?). The normal freezing point of benzene is 5.5°C and K f (benzene) is 5.12°C / m.

    asked on September 4, 2014
  47. Math

    An auditorium has 50 rows of seats. The first row has 20 seats, the second row has 21, the third row has 22 seats, and so on, each row having one more seat than the previous row. How many seats are there all together? a. write 2 different expressions for

    asked on October 29, 2010
  48. Physic~~~

    Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. So I was doing this and I got stuck here; gs = G*Ms/Rs² = G*(95Me)/(9²Re²) =

    asked on January 6, 2015
  49. Science

    Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

    asked on March 25, 2013
  50. physics

    A metal can containing condensed mushroom soup has a mass of 269 g, a height of 14.7 cm, and a diameter of 6.79 cm. It is placed at rest on its side at the top of a 3.34 m long incline that is at an angle of 22.4o to the horizontal and is then released to

    asked on November 3, 2009
  51. Math

    A stained glass window has an area of 900 square inches. A. Once a window design is made of rectangular pieces that are 5 inches by 3 inches. How many stained glass pieces are used in the window? B. Another window design is made of square stained glass

    asked on April 23, 2018
  52. Math

    Question: A tunnel with a parabolic arch is 12 m wide. If the height of the arch 4 m from the left edge is 6 m, can a truck that is 5 m tall and 3.5 m wide pass through the tunnel? Justify your decision. I drew the graph of the arch with x-intercepts (0,0)

    asked on August 19, 2010
  53. Math

    Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5,1) each vertex of the rectangle is located at a point that has

    asked on March 26, 2016
  54. English

    Compare Lines 586-87 with those spoken by Satan in Book I: "The mind is its own place, and in itself Can make a Heav'n of Hell, a Hell of Heav'n."

    asked on April 23, 2017
  55. Life sciences, Business studies,Maths lit and CAT

    With Life sciences, Business studies,Maths lit and CAT, what can I study after matric? Which career field should I follow?

    asked on May 21, 2014
  56. Physics

    We study the three point charges shown in the figure. They are held at the corners of an equilateral triangle with ℓ = 0.9 m. What is the electric potential energy of the system of three point charges? Use for the three charges q1 = +2Q, q2 = −3Q, and

    asked on February 7, 2016
  57. Physics

    The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What is the work done by this force on the truck?

    asked on November 14, 2012
  58. American Government

    Why do presidents prefer federal judges who tend to agree with their views?

    asked on January 22, 2017
  59. Physics

    A 63-kg ice-skater glides with a speed of 10 m/s toward a 14-kg sled at rest on the ice. The ice-skater reaches the sled and holds on to it. The ice-skater and the sled then continue sliding in the same direction in which the ice-skater was originally

    asked on March 22, 2016
  60. Math

    Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.

    asked on March 20, 2013
  61. Chemistry

    How many milliliters of .100 M HNO3 are needed to neutralize 58.5 mL of .0100 Al(0H)3?

    asked on February 17, 2012
  62. Math

    CLIMATOLOGIST Each year a tree is alive,it adds a layer of growth,called a tree ring,between its core and its bark. A climatologist measures the width of tree rings of a particular tree for different years: YEAR: 1900:1910:1920:1930:1940 Width of

    asked on September 6, 2016
  63. Trig

    A carousel with a 50-foot diameter makes 4 revolutions per minute. a) Find the angular speed of the carousel in radians per minute. b) Find the linear speed in feet per minute of the platform rim of the carousel.

    asked on April 1, 2012
  64. Sport please help me i have a test 2morrow

    What are the reasons for the olympic games to be largest of all sporting events?

    asked on November 9, 2011
  65. chemistry

    A major component of gasoline is octane C8H18. When octane is burned in air, it chemically reacts with oxygen gas O2 to produce carbon dioxide CO2 and water H2O. What mass of octane is consumed by the reaction of 8.8g of oxygen gas? Round your answer to 2

    asked on August 9, 2016
  66. Math

    1.which symbol completes the statement 3\8 - 1\4 a.> b.< c.= 2.which symbol completes the statement 5\8 - 11\16 a.> b.< c.= 3.which symbol completes the statement 4\6 - 6\9 a.> b.< c.= 4.order the following fractions from least to greatest

    asked on October 5, 2016
  67. chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate

    asked on February 16, 2010
  68. physics

    Piston 1 has a diameter of 0.643 cm. Piston 2 has a diameter of 4.59 cm. In the absence of friction, determine the force required on piston 1 necessary to support an object, m, with weight 1151 N. (Neglect the height difference between the bottom of the

    asked on October 27, 2012
  69. Chemistry

    Calculate the heat released when 1.00L of Cl2 (g) with a density of 1.88g/L reacts with an excess of sodium metal at 25 degrees C and 1 atm to form sodium chloride.

    asked on November 30, 2015
  70. College Chemistry

    How much Ca(OH)2 is required to remove 90.0% of PO4^-3 from 7.5 times 10^6 L of drinking water containing 25 mg/l of PO4^-3?

    asked on February 17, 2012
  71. Math

    Use the related acute angle to state an equivalent expression: a) tan 110 degrees b)sin 350 degrees

    asked on December 4, 2010
  72. General Chemistry (Chem101)

    A chemist mixes two liquids A and B to form a homogeneous mixture. The densities of the liquids are 2.0514 g/mL for A and 2.6678 g/mL for B. When she drops a small object into the mixture, she finds that the object becomes suspended in the liquid; that is,

    asked on September 20, 2012
  73. math

    9. solve |4x + 3| = 9 + 2x and check for extraneous solutions. the first answer I got was: |4x +3| = 9 + 2x |4x| = 6 + 2x 2x = 6 x = 3 can someone help me find the other answer? thank you!

    asked on May 12, 2016
  74. Geometry

    In a regular polygon (equal sides and angles), you use (n-2)180 to find out what the interior angle sum is (n=number of sides in polygon) and you divide by that number by whatever n is to find out the measure of an individual angle, right? Well, there is

    asked on September 27, 2007
  75. chemistry

    The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M is a generic metal. A 0.170-mole quantity of M(NO3)2 is added to a liter of 1.040 M NaCN solution. What is the concentration of M2 ions at equilibrium?

    asked on March 25, 2016
  76. Physics (Tension and Springs)

    An archer must exert a force of 375 newtons on the bowstring so that the string makes a 35 degree angle with the vertical. a)find the tension in the bowstring b)if the applied force is replaced by a stretched spring, and the spring is stretched 30 cm from

    asked on March 16, 2015
  77. Physics 1

    A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.749 rad/s2. After what

    asked on April 1, 2013
  78. physics @ elena

    can you please help me with this one At serve, a tennis player aims to hit the ball horizontally. part a)What minimum speed is required for the ball to clear the 0.90m--high net about 15.0m from the server if the ball is "launched" from a height of 2.50m ?

    asked on April 22, 2012
  79. chemistry

    51.59 g of water at 82.6 oC is added to a calorimeter that contains 48.01 g of water at 40.9 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.

    asked on March 26, 2012
  80. Math

    Given any right triangle with an acute angle theta, a) Explain why csc theta is always greater than or equal to 1 b) Explain why cos theta is always less than or equal to 1

    asked on October 8, 2010
  81. ap chem

    consider the molecules PF3 and PF5. b]is the PF3 molecule polar or is it nonpolar. explain C] on the basis of bonding principles, predict whether each of the following compounds exists. In each case explain your prediction. (i) NF5 (ii) AsF5 2. explain why

    asked on January 23, 2007
  82. Calculus 1

    Hi! Could someone help me with this problem. You have 8L feet of fence to make a rectangular vegetable garden alongside the wall of your house, where L is a positive constant. The wall of the house bounds one side of the vegetable garden. What is the

    asked on March 26, 2018
  83. English grammar

    In the following sentence identify the function of the infinitive (phrase). Is it too expensive to travel to Europe? My list of answers contains: Adverb, subject, direct object, adjective, object of preposition, and predicate noun. I chose predicate noun.

    asked on July 21, 2015
  84. physics

    A crate sits on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the

    asked on June 3, 2015
  85. Math

    As many 8cm diameter discs as possible are cut from a sheet of rectangular cardboard measuring 170cm by 90cm. Find the area of the sheet that is left.

    asked on March 20, 2013
  86. math

    ragan takes an hour to plant 2 vines between each of the 6 posts in the first row of his vineyard how long will it take to plant two vines between each of the 9 posts in the longer second row hint 10 vines take one hour

    asked on February 1, 2011
  87. math

    6. The half-life of a certain radioactive material is 32 days. An initial amount of the material has a mass of 361 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 5 days. Round your

    asked on May 11, 2016
  88. Physics

    What is the magnitude of the momentum of the 0.057-kg tennis ball when it travels at a speed of 29 m/s? Earth is the frame of reference.

    asked on February 25, 2016
  89. calculus

    1 pt) Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 68 degrees F and a living body temperature of

    asked on April 1, 2015
  90. Animal Farm

    According to Benjamin, what is the one unalterable law? How does his idea compare to actual conditions in the Soviet Union today? --------------------------------------------------------------------------------------- This is the passage this question is

    asked on December 7, 2008
  91. Calculus

    A University of Rochester student decided to depart from Earth after his graduation to find work on Mars. Before building a shuttle, he conducted careful calculations. A model for the velocity of the shuttle, from liftoff at t = 0 s until the solid rocket

    asked on April 21, 2013
  92. Chemistry

    What pressure is required to reduce 34 mL of a gas at standard conditions to 16 mL at a temperature of 20◦C

    asked on March 29, 2015
  93. English

    I have a question its which diagram correctly represents this sentence? Sara, José, and Kenny were studying together for the test. How can I post a link to show you the diagrams?

    asked on October 13, 2014
  94. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 214 m, and the car completes the turn in 40.0 s (Figure shows coordinate plane with point A on -y axis point C on

    asked on March 6, 2012
  95. fractions

    Claire cut some apples into eights. She ate all but 17 pieces. how many whole apples and parts of apples did she have left over?

    asked on March 3, 2010
  96. Trig

    A 7.25 inch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.

    asked on April 1, 2012
  97. physics

    What is the approximate mass of air in a living room 6.0 m times 3.9 m times 2.7 m?

    asked on November 1, 2010
  98. Math

    A company predicts that this years sales will be equivalent to 144% of last years sales. Which value represents 144%? A. 14.4 B. 1 11/25 C. 1.56 D. 14 4/5

    asked on April 9, 2015
  99. Chemistry

    Calculate delta H for this reaction: N2 + 3H2 --> 2NH3 I am given the bond dissociation energy for N-N (163 kJ/mol), H-H (436 kJ/mol), and N-H (391 kJ/mol) I can't seem to find a similar problem anywhere, they are all given 2 or 3 similar equations.

    asked on December 1, 2012
  100. Chem

    There are two stable isotopes of Gallium Their masses are 68.92558 and 70.9247050 AMU. If the average atomic mass of gallium is 69.7231, what is the natural abundance of the lighter isotope? I don't know where to start!

    asked on September 20, 2012


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