Popular questions and responses by kyle
  1. Physics

    An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch

    asked on November 19, 2012
  2. Physics

    A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of

    asked on September 27, 2011
  3. History

    What impact did World War I have on Russia? a.Russia’s territorial losses in the Baltic region led it to sign the Versailles Treaty to end its involvement. b.Russia’s high casualty rate led Czar Nicholas II to abandon the war effort to save civilian

    asked on January 23, 2018
  4. History

    What impact did technology have during World War I? a.Guerrilla warfare became more prevalent with advances in surveillance technology. b.The use of iron created the first battleships in the history of warfare. c.Military advancement on the western front

    asked on January 23, 2018
  5. Physics

    A 70.0-kg astronaut pushes to the left on a spacecraft with a force in "gravity-free" space. The spacecraft has a total mass of 1.0 × 104 kg. During the push, the astronaut accelerates to the right with an acceleration of 0.36 m/s2. Determine the

    asked on January 5, 2017
  6. pH

    Determine the pH of each of the following solutions. 0.21 M KCHO2 0.19 M CH3NH3I 0.19 M KI I'm not sure how i should set up the ice chart, and what Ka I should be using for the solutions

    asked on March 24, 2010
  7. Buffer solution

    Solve an equilibrium problem (using an ICE table) to calculate the pH. a solution that is 0.205 M in CH3NH2 and 0.110 M in CH3NH3Br. i used th Ka of CH3NH2 and set up the problem as Ka=[H3O][CH3NH2]/[CH3NH3Br], but that was wrong. So i switched the

    asked on March 27, 2010
  8. History

    What was the Battle of the Somme? A.It was the longest battle that occurred during World War I. B.It was a battle that opened a second World War I front in Turkey. C.It was a months-long battle resulting in massive British casualties. D.It was a battle

    asked on January 23, 2018
  9. calculus

    Find the solution of the differential equation that satisfies the given initial condition. dp/dt=2 sqrt(pt), P(1)=5 my answer: P=(2/3t^(3/2)+(15sqrt(5)-10)/15)^2 how is it wrong?

    asked on March 20, 2016
  10. Chemistry

    A solution contains Cr+3 ion and Mg+2 ion. The addition of 1.00 L of 1.55 M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 49.8 g. Find the mass of Cr+3 in the

    asked on October 12, 2009
  11. math

    Three faucets fill a 100-gallon tub in 6 minutes. How long, in seconds, does it take six faucets to fill a 25-gallon tub? Assume that all faucets dispense water at the same rate.

    asked on July 28, 2016
  12. English

    Explain the transfer of authority symbolized by the transfer of keys between Helen, Kate, and Annie throughout the play. Write a paragraph of at least 125 words.

    asked on July 16, 2020
  13. Algebra

    negative numbers closed under subtraction. True or false My answer is false, is this correct

    asked on August 20, 2015
  14. History

    What was a main cause of the Italian Independence War in the 1860s? A.opposition of the Italians against King Victor Emmanuel B.Austrian occupation and rule of northern Italy C.Napoleon’s conquest of the Italian peninsula D.a mutiny by Italian soldiers

    asked on January 23, 2018
  15. math

    Suppose babies born in a large hospital have a mean weight of 3181 grams, and a standard deviation of 526. If 97 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would differ from the

    asked on January 23, 2015
  16. physics

    Two 72.0-kg hockey players skating at 7.00 m/s collide and stick together. If the angle between their initial directions was 130 degrees , what is their speed after the collision?

    asked on March 17, 2010
  17. mole fraction

    A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 241 torr. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of

    asked on January 30, 2010
  18. College Chemistry

    Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 215 mg/L. I calculated the molarity as 1.58*10^-3 and the Ka as 1.58*10^-10. I did ICE and i got the pH as 6.3, but it was

    asked on March 23, 2010
  19. Physics

    A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4.8 m down a θ = 36° incline. The sphere has a mass M = 3.2 kg and a radius R = 0.28 m. If there is no frictional force, what is the translational kinetic

    asked on March 12, 2016
  20. Chemistry

    Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find

    asked on January 16, 2013
  21. Chem!??!?!?!?

    Is it possible for a cup of water to completely evaporate in a room with a constant temperature of 21ºC??? Yes, of course. Why would you think it would not? A wet towel will dry, right? but why is that? The Kinetic Molecular Theory, distributed velocity

    asked on January 22, 2007
  22. English

    Create a brief outline of the events from Franklin's anecdote.

    asked on June 14, 2020
  23. Physics

    A hydroxide ion (OH−) in a glass of water has an average speed of about 600 m/s. Determine the magnitude of the electrical force between the hydroxide ion (charge −e) and a positive ion (charge +e) that is 1.0 × 10−8 m away (about the separation of

    asked on October 3, 2016
  24. Calculating Vapor Pressure

    The vapor pressure of nitrogen at several different temperatures is shown below. Temperature (K) Pressure (Torr) 65 130.5 70 289.5 75 570.8 80 1028 85 1718 1. Use the data to determine the heat of vaporization of nitrogen in kJ/mol. 2.Determine the normal

    asked on January 17, 2010
  25. math

    Determine if the statement is always, sometimes, or never true: A right triangle is an obtuse triangle. always sometimes never

    asked on July 16, 2014
  26. Chemistry Equations

    What's the equation for the formation of NO2(g) from its elements in its standard states? What's the equation for the formation of BF3(g) from its elements in its standard states? What's the equation for the formation of C2H5OH(l) from its elements in its

    asked on November 5, 2009
  27. English

    Create an entry for a works-cited list using the following information. The discussion of the source in the paper focuses on the images and message of the film. Remember, your capitalization, spacing, and punctuation must be exact. NOTE: If you need to use

    asked on February 27, 2020
  28. Physics

    An aluminum ring of radius 5.00 cm and resistance 2.00 10-4 Ω is placed around the top of a long air-core solenoid with 997 turns per meter and a smaller radius of 3.00 cm, as in the figure below. If the current in the solenoid is increasing at a constant

    asked on March 12, 2013
  29. chemistry

    Butane has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 degrees C. A 250mL sealed flask contains 0.5g of butane at 25 degrees C. How much butane is present as a liquid? If the butane is warmed to 25 degrees C, how much is

    asked on December 10, 2010
  30. college physics

    In a nuclear reactor, neutrons released by nuclear fission must be slowed down before they can trigger additional reactions in other nuclei. To see what sort of material is most effective in slowing (or moderating) a neutron, calculate the ratio of a

    asked on March 18, 2010
  31. chemistry

    what type of reaction occurs Fe3O4 + 4H2 → 3Fe + 4H2O

    asked on April 18, 2014
  32. English

    Select all that apply. If you are using an in-text citation for a book, what information needs to be put in parentheses? the author's name the author's last name the book's title the publisher the page number

    asked on March 1, 2020
  33. math

    If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its radius is

    asked on July 10, 2014
  34. Brief calculus

    The marginal cost of producing the xth box of CDs is given by 9 − x/(x^2 + 1)^2. The total cost to produce 2 boxes is $1,200. Find the total cost function C(x). I'm getting 9x-(1/(x^2 - 1))+1181.9 but i guess its wrong

    asked on November 3, 2013
  35. heat of vaporization

    Suppose that 1.00 g of rubbing alcohol (C3H8O) evaporates from a 54.0 g aluminum block. If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the

    asked on January 16, 2010
  36. physics

    The second hand on a watch has a length of 4.50 mm and makes one revolution in 60.00 s. What is the speed of the end of the second hand as it moves in uniform circular motion? I just need some help getting started

    asked on November 4, 2008
  37. math

    Which statements about a rhombus are always true? Its diagonals are congruent. All angles are congruent. All sides are congruent. Its diagonals are Û to each other.

    asked on July 16, 2014
  38. Chemistry

    The elements lithium and oxygen react explosively to from lithium oxide (Li2O). How much lithium oxide will form if 3.03 mol of lithium react? Answer in units of mol

    asked on April 4, 2013
  39. spanish

    Querida Beth: 1) (blank) esta todo bien y esperamos que 2) (blank) tambien lo este. 3) (blank) lo pensemos y lo conversemos, tu padre y yo no estamos contentos con tu viaje. 4) (blank) en nuestras vidas estamos muy preocupados porque creemos que eres mu

    asked on October 20, 2010
  40. English

    Outline the structure of the classification paragraph in the space provided below. Topic sentence: Purpose 1: Purpose 2: Purpose 3: Purpose 4: ​Concluding statement: Authors typically write for one of four purposes. Writers write to inform readers, that

    asked on June 14, 2020
  41. math

    Draw a diagram to show that there are two tangent lines to the parabola y = x2 that pass through the point (0, −25). Find the coordinates of the points where these tangent lines intersect the parabola.

    asked on January 9, 2016
  42. math

    If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its center point is

    asked on July 10, 2014
  43. Lattice Energy

    Arrange the following substances in order of decreasing magnitude of lattice energy. KCl NaF SrO BaO

    asked on December 5, 2009
  44. English

    Complete the sentence with the appropriate word from the spelling list. I a0 that you are an intelligent girl. Not inviting old Aunt Mumby was a serious a0. You might say that Job was a a0 man. I a0 eat dinner by six o'clock. Owning fifty-seven pairs of

    asked on October 6, 2019
  45. math

    Suppose y varies directly with x and y = 72 when x = 6. What direct variation equation relates x and y? What is the value of y when x = 10?

    asked on October 21, 2016
  46. Science

    How much current does a flashlight use if its battery supplies 3.0 Volt and the bulb has a resistance of 4.0 Alpha

    asked on April 7, 2015
  47. ap chemistry

    a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.

    asked on January 5, 2015
  48. Chemistry

    seriously, any help would be much appreciated. You conduct another experiment on silver condensation. You add 8.0 g of silver nitrate to 200 mL of pure water. You attach a single 850 mAh AAA battery (at 1.3 V) to the electrochemical cell. You can assume

    asked on November 18, 2013
  49. Physics

    Ordinary glasses are worn in front of the eye and usually 2.00 cm in front of the eyeball. A certain person can see distant objects well, but his near point is 60.0 cm from his eyes instead of the usual 25.0 cm. Suppose that this person needs ordinary

    asked on May 28, 2012
  50. science

    When you are finished with the experiment, complete the following data analysis and submit your answers. Determine the volume of the box and the block. Determine the ratio of the block to the box: The volume of box=(L)(W)(H) The volume of the block

    asked on March 5, 2020
  51. Algebra

    2 cyclists start from the same point and ride in opposite directions. 1 rides twice as fast as the other. In 3 hours they are 90km apart. What is the rate of each cyclist? I figured out the answer is 20km/h and 10km/h. What I don't know and need help with

    asked on November 13, 2016
  52. English and Vocabulary

    My Vocab Words: 1. Degenerate 2. Implausible 3. incoherent 4. intercede 5. intricate 6. sanctuary 7. scrutiny 8. sinister 9. suffice 10. vulnerable need help 1-2 Birds feel ___ to attack when they are out in the open where shrubbery is sparse. To attract

    asked on October 28, 2015
  53. Physics

    A simple pendulum has a bob of mass M. The bob is on a light string of length l. The string is fixed at C. At position A, the string if horizontal and the bob is at rest. The bob is released from A and swings to B, where the string is vertical. The tension

    asked on October 11, 2015
  54. Math

    A length of rope is stretched between the top edge of a building and a stake in the ground. The head of the stake is at ground level. The rope also touches a tree that is growing halfway between the stake and the building. If the tree is 38 feet tall, how

    asked on December 4, 2014
  55. Challenge and Change

    I'm trying to find an answer to this question.. Search and find three other contributors to the field of Marxist or neo-Marxist (new Marxist) research... I've been searching for hours with no luck!! Someone please help!

    asked on February 17, 2008
  56. English

    Choose one of the following topics and write at least 200 words. 3. Compare and contrast Grace and Jo-Anne.

    asked on June 10, 2020
  57. history

    Match these items. 1. A.D. 500 to A.D. 1450 2. estate 3. peasants 4. social, economic, political way of life 5. religious wars 6. an instrument to chart a course Middle Ages astrolabe serfs manor feudal system Crusades

    asked on November 4, 2019
  58. SS

    Why did Britain and France adopt a policy of appeasement when meeting with Hitler at the Munich conference A They knew he had an agreement with the Soviet union over Poland B they were led to believe he wouldn't try to take any more territory in Europe

    asked on March 2, 2017
  59. Gen Chem II

    You conduct another experiment on silver condensation. You add 8.0 g of silver nitrate to 200 mL of pure water. You attach a single 850 mAh AAA battery (at 1.3 V) to the electrochemical cell. You can assume that the entire battery charge is useable for

    asked on November 18, 2013
  60. Physics

    For no apparent reason, a poodle is running at a constant speed of 5.80 m/s in a circle with radius 2.3 m. For t_delta = 0.5 s calculate the magnitude of the average acceleration a_av. I have no idea how to start this problem because I'm trying to use this

    asked on August 16, 2011
  61. Kinetic Molecular Theory

    A sample of N2O effuses from a container in 48 seconds. How long would it take the same amount of gaseous I2 to effuse from the same container under identical conditions?

    asked on October 25, 2009
  62. physics

    a force of 10 N holds an ideal spring with a 20-N/m spring constant in compression. The potential energy stored in the spring is..? 0.5J, 2.5J, 5.0J, 10J, or 200J? POtential energy? Wouldn't it be 1/2 kx^2, but x= F/k, so 1/2 kx^2= 1/2 k*F^2/k^2 and that

    asked on May 2, 2007
  63. bible

    Christ's famous "Sermon on the Mount" appears in chapters 5-7 and is scattered throughout the Gospel of.

    asked on March 12, 2020
  64. math

    Suppose Johnny invests $41,745 into an account, which has been earning interest for many years and he now has a total of $39,974. In two or more sentences explain why a negative number would/wouldn’t be reasonable in the solution of the rate of the

    asked on March 11, 2020
  65. math

    The spinner below is spun once. What is the probability that the spinner will land on 5 or 7? 25% 16% 8% 12 ½%

    asked on March 10, 2020
  66. math

    In a bag there 28 marbles. 7 black 6 pink 5 blue 4 purple 3 yellow 2 green 1 white You randomly pick one marble from the bag. What is P(not black)? 21% 75% 7% 25%

    asked on March 8, 2020
  67. french

    Compose a six to eight sentence paragraph in English comparing how France and the U.S. have been influenced by immigrants. Think about food, music, art, etc.

    asked on February 13, 2020
  68. math

    The similar figures, parallelograms ▱QUAD and ▱STOP, have a ratio of 3:1 between their corresponding sides. If ▱STOP has an area of 64 square yards, then ▱QUAD has an area of a0 square yards. The similar figures, parallelograms ▱QUAD and ▱STOP,

    asked on November 13, 2019
  69. math

    Before they graduate from Great Lakes High School, all 12th-grade students fill out a survey about their future college plans. Are you attending an in-state college after high school graduation? Will you begin college during the summer semester? The same

    asked on November 6, 2019
  70. Math (calc)

    An open box with a square base is to have a volume of 12ft^3. Find the box dimensions that minimize the amount of material used. (round to two decimal places). it asks for the side length and the height. Please help asap due in a few hours. Thank you

    asked on February 8, 2017
  71. math

    Explain why it is possible to draw more than two different rectangles with an area of 36 square units, but it is not possible to draw more than two different rectangles with an area of 15 square units. The sides of the rectangles are whole numbers. EXPLAIN

    asked on February 7, 2015
  72. Physics

    A 5.00×10^5-kg rocket is accelerating straight up. Its engines produce 1.250×10^7 N of thrust, and air resistance is 4.50×10^6 N. What is the rocket’s acceleration? I just need the formula for finding the acceleration.

    asked on October 1, 2014
  73. Chemistry

    The atomic number of an electrically neutral atom is equal to the number of: Choose all that apply. Neutrons Electrons Protons I chose Electrons but somehow my homework program is telling me it's wrong? I also tried checking all of them.

    asked on January 13, 2013
  74. Physics

    In a very busy off-campus eatery one chef sends a 241-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.53 m/s. Almost simultaneously, the other chef launches a 321-g veggieburger-on-a-bun (with everything, but

    asked on November 19, 2012
  75. Chemistry

    The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb

    asked on October 11, 2012
  76. Physics

    A circular loop of wire with radius 0.0450 m and resistance 0.154 R is in a region of spatially uniform magnetic. The magnetic field is directed out of the plane. The magnetic field has an initial value of 7.89 T and is decreasing at a rate of -0.630 T/s.

    asked on February 29, 2012
  77. Physics

    Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same

    asked on September 5, 2011
  78. chemistry

    What is the expected van't Hoff factor for NaC2H3O2 in an aqueous solution, assuming 100% dissociation.

    asked on December 6, 2010
  79. Physics

    A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 5.40 m/s at the

    asked on November 3, 2008
  80. Algebra 1

    How do you find the area of a triangle using Polynomials?

    asked on August 28, 2007
  81. English

    Identify the error in this works-cited entry for a print article in a magazine with no author. "The Hunger Problem in America," Newsweek. 15 Jun. 2007. p. 76. incorrect punctuation between elements incorrect order of elements incorrect capitalization

    asked on March 1, 2020
  82. history

    Changes to the earth that can be explained by plate tectonics include all of the following except _____. earthquakes erosion mountain ranges volcanoes Which of the statements below does not describe erosion? Erosion can benefit the environment. Erosion can

    asked on February 25, 2020
  83. math

    The similar figures, parallelograms ▱QUAD and ▱STOP, have a ratio of 3:1 between their corresponding sides. If = 15, then to = a0. The similar figures, parallelograms ▱QUAD and ▱STOP, have a ratio of 3:1 between their corresponding sides. If = 10,

    asked on November 13, 2019
  84. math

    Solve the geometric probability scenario that you created for question #1. Include all appropriate geometric formulas, and when applicable, leave your answer in terms of and include all necessary calculations. here is my answer is it correct? area of

    asked on November 10, 2019
  85. math

    Which of the following scenarios represents a possible impulse purchase? Bryce researches interest rates on the purchase of a new car before deciding to make a purchase. Bryce purchases the car of his dream by financing the entire cost of the car with a

    asked on October 13, 2019
  86. math

    In the small town of Middleton, there are only two restaurants that serve pizza- a small family-owned Italian restaurant and a new franchise pizza restaurant. In a recent review of the franchise, a food critic reported that the pizza was delicious as

    asked on October 10, 2019
  87. math

    Kyle opened a bank account with $450. He deposits $58.50 each week. Write a function that shows the amount he has after w weeks. What is the function.

    asked on July 11, 2016
  88. science

    a 54-gram sample of an unknown material has a volume equal to 20cm3 what is the identity of the substance

    asked on February 18, 2016
  89. College Algebra

    An object is projected vertically upward from the top of a building with an initial velocity of 112 ft/sec. Its distance s(t) in feet above the ground after t seconds is given by the equation s(t) = −16t^2 + 112t + 100. (a) Find its maximum distance

    asked on November 12, 2014
  90. math

    The altitude of an equilateral triangle is 6 square 3 units long. The length of one side of the triangle is ____ units.

    asked on July 14, 2014
  91. math

    If the point (a,3) lies on the graph of the equation 5x + y = 8, then a=

    asked on July 10, 2014
  92. math

    The radius of one sphere is twice as great as the radius of a second sphere. Find the ratio of their surface areas.

    asked on July 9, 2014
  93. physics

    A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.170 rad/s2. After making 2870 revolutions, its angular speed is 131 rad/s. (a) What is

    asked on July 16, 2013
  94. Physics. Please please help!

    A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the

    asked on November 14, 2012
  95. psyhics

    A ball is dropped from the top of a 95 m building. With what speed does the ball hit the ground?

    asked on January 29, 2012
  96. Physics

    A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing

    asked on July 27, 2011
  97. Chemistry

    Suppose that the KMnO4 (aq) were standardized by reaction with As2O3. As2O3 + MnO4- + H+ +H2O yields H3AsO4 + Mn2+ (not balanced). If a 0.1322-g sample that is 99.16 % As2O3 by mass had been used in the titration, how many milliliters of the 0.02140 M

    asked on September 21, 2010
  98. chemistry

    What effect (shift to the right or left) does an increase in temperature have on each of the following systems at equilibrium? a) 3O2(g) ==> 2O3 (g) 2SO3(g)

    asked on June 15, 2010
  99. math

    write an equation in point-slope form for the line through the given point with the given slope (4, -6); m = 3 over 5

    asked on December 13, 2009
  100. computers

    Microsoft Surface can do all of the following except ______. organize and trade music files teleport physical objects purchase goods and services plan travel routes _______ tours are a visual simulation of an existing location generally composed of

    asked on June 15, 2020


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