Most popular questions and responses by carl
  1. Social Studies

    How did the role of the church in education change over time? A. Universities changed from being independent to being part of the church. B. Priests became the only teachers at universities. C. Schools began to provide education beyond religious

    asked on January 7, 2019
  2. Math

    Can someone please explain to me how to solve this: Simplify 6P2. A) 30 B) 15 C) 12 D) 720

    asked on April 23, 2015
  3. stat

    for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly selected college students are listed below. use a 0.10 significance level to test the claim that the standard deviation of IQ scores

    asked on May 14, 2012
  4. Math

    The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?

    asked on April 21, 2018
  5. Trig

    Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above

    asked on December 13, 2011
  6. math

    in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

    asked on September 21, 2013
  7. Dynamics

    A boy running a foot race rounds a flat curve of 50 ft radius. If he runs at rate of 15 mph, at what angle with the vertical will be inclined his body? A.) 16.75° B.) 13.67° C.) 76° show solution step by step thanks

    asked on July 14, 2018
  8. Geometry

    A 12-foot ladder is leaning against the outside wall of a building. The angle of the ladder with the ground is 75 degrees. The ladder is moved so that the base of the ladder is 5.8 feet from the wall. Determine the angle created by the ladder and the

    asked on December 8, 2017
  9. Dynamics

    A stone has an initial velocity of 100 fps up to the right at 30 degrees with the horizontal. The components of the acceleration are constant at ax=-4 fps^2 and ay=-20 fps^2. Compute the horizontal distance covered until the stone reaches the point 60 ft

    asked on July 14, 2018
  10. Maths

    The sides of the equilateral triangle is 3x+2,2y-x and y+3 find x and y.and the perimeter of the triangle

    asked on June 1, 2018
  11. Physics

    Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I

    asked on November 9, 2014
  12. Chemistry

    How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron

    asked on November 16, 2017
  13. science

    Can someone describe how a sound wave travels through a medium to create sound. Can you also provide a descriptions of vibrations, longitudinal waves, compressions, rarefactions, and direction of movement in your response. That way I could understand it

    asked on May 15, 2019
  14. Physics

    Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 7.5 cm/year. a)What distance does it move in 1 s at this speed? b)What is its speed in kilometers per million years?

    asked on August 27, 2018
  15. Algebra

    I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor

    asked on January 24, 2008
  16. Genealogy

    What is the best free of charge way to look up past birth records?

    asked on May 28, 2019
  17. Algebra

    Randall wants to mix 57 lbs of nuts worth $1 per lb with some nuts worth $6 per lb to make a mixture worth $5 per lb. how many lbs of $6 nuts must he use?

    asked on May 20, 2016
  18. chemistry

    A plastic container with a mass of 30 grams gains 1,140 joules of heat. If the temperature of the container increases 20°C, what is the specific heat of the plastic in the container?

    asked on January 4, 2012
  19. English II B

    A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing

    asked on April 3, 2014
  20. Math

    Differentiate y=13x^2-5x+8

    asked on July 25, 2018
  21. math

    William is traveling at a rate of 75 miles per hour. How fast is William traveling in feet per second?

    asked on December 4, 2017
  22. calculus

    What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the origin and ending at a point a,b b|------------| | /| | / | | / | | / | | / | | r / | | / | | / | | / | | / | | / |

    asked on September 28, 2011
  23. Physics

    Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some

    asked on November 9, 2014
  24. English

    Which of the following was valued during the Romantic period? logic individualism balance restraint

    asked on September 23, 2015
  25. English II B

    What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

    asked on April 3, 2014
  26. math

    Evaluate the integral given below. integral(x^2+13)^2dx

    asked on September 8, 2018
  27. Chemistry

    Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O? How many grams of NaO2 are required to produce 1.60 x 10^2 grams of NaOH?

    asked on March 21, 2012
  28. English II B

    Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading anthology 3.a poetry contest 4.a school newspaper

    asked on April 3, 2014
  29. Science

    A ray of light hits a plane mirror lying across a floor 2m from the vertical wall. The angle of incidence of the ray is 40 degrees. At what point on the wall will the reflected light fall? Express the answer in terms of height from the floor.

    asked on May 2, 2019
  30. science

    why is it advisable to use plasticwares instead of the conventional glasswares in spectrophotometry?

    asked on May 12, 2019
  31. algebra 2

    teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /

    asked on April 23, 2009
  32. math

    The median of a set of 8 consecutive even integers is 61. What is the largest integer in the set?

    asked on December 4, 2017
  33. Math

    convert feet and inches to only feet. a) 17 ft 6 in

    asked on March 8, 2019
  34. Chemistry

    1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

    asked on April 26, 2011
  35. Math

    Tameron made a recipe that called 1/4 teaspoon of salt. If the recipe is doubled, how much salt is needed?

    asked on March 17, 2016
  36. Chemistry

    Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M NaOCl(aq) with 0.3 M HBr At 0.00 mL of HBr: At 70 mL of HBr: At 100 mL HBr: At 120 mL of HBr

    asked on March 12, 2015
  37. statistics

    1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a mean SAT score of 1030 is

    asked on June 8, 2011

    This question tells us to answer if the children bahaved good or bad from the paragraph below. Todos los niños le regalaron a Ana muchas cosas fantásticas. Había muñecas, juguetes, animales de peluche … y más cosas. Susana le regaló un oso de

    asked on February 3, 2015
  39. Physics

    The average distance between Earth and the Sun is 1.5 ✕ 10^11 m. a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second. b) What is this speed in miles per hour?

    asked on August 26, 2018
  40. math calculus

    Let f be twice differentiable with f(0)=12, f(3)=9, and f '(3)=4.Evaluate the integral upper limit 3 and lower integral 0 xf'' (x)dx

    asked on September 13, 2018
  41. Chemistry

    120.0g of ice is melted, how much energy is absorbed?

    asked on February 21, 2014
  42. science

    if 2 north poles are brought together, is the resultant pole strength of the combination equal to the sum of their pole strengths?

    asked on May 3, 2019
  43. Science

    Some nitrogen atoms have seven neutrons and some have eight neutrons. These two forms of nitrogen are: a. ions of each other b. phases of each other c. isotopes of each other and how exactly do you know? My book doesn't cover this at all yet its in my

    asked on February 5, 2013
  44. Science

    Common suspension and their uses

    asked on June 18, 2019
  45. math

    Water is pumped into a cylindrical tank, standing vertically, at a decreasing rate given at time minutes r(t) = 130 - 10t ft^3/min for 0≤t≤5.The tank has radius 6 ft and is empty when t=0. Find the depth of the gasoline in the tank at t=3.

    asked on August 23, 2018
  46. Chemistry

    A pH = 7.6 buffer is needed in the lab. This buffer is made by first dissolving 17.42 g K2HPO4 in 600 mL of water. What is the pH of this salt solution? This solution of course will be too basic becuase we only have the base of the buffer present. What

    asked on March 12, 2015
  47. algebra

    Solve the problem. Frank can type a report in 3 hours and James takes 4 hours. How long will it take the two of them typing together?

    asked on March 20, 2009
  48. Geometry

    A billiard ball bounces off the sides of a rectangular billiards table in such a way that

    asked on September 27, 2017
  49. Essex

    An investment club placed $33,000 into two simple interest accounts. On one account, the annual simple interest rate is 6.5%. On the other, the annual simple interest rate is 4.5%. How much should be invested in each account so that both accounts earn the

    asked on February 16, 2016
  50. njit

    please life saver i am taking a quiz now can some one help me with this pleeeeeeeaaaaaaaaassssssseeee Calculate the pH of 0.175 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13.

    asked on March 15, 2013
  51. physics

    suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

    asked on August 22, 2012
  52. Physics

    A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

    asked on November 21, 2010
  53. Calculus

    Give an example of a function that is integrable on the interval [-1,1], but not continuous on [-1,1].

    asked on November 9, 2009
  54. chemistry

    a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387

    asked on November 15, 2008
  55. Science

    When a bar magnet is cut into two halves repel each other. Why? What becomes of the original north and south poles of that magnet??

    asked on May 3, 2019
  56. Batteries

    3 Sn^2+ (aq) + 2 Al (s) 2 Al3+(aq) + 3 Sn(s). What is the voltage for this cell? What is the voltage for the cell if the Sn2+(aq) is [.15] and Al3+(aq) is [1.80]? Using proper line notation, describe the cell described in the question.

    asked on November 9, 2015
  57. Calculus (math)

    A rescue cable attached to a helicopter weighs 2 lb/ft. A 190 lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done by lifting the man if the helicopter is 50 ft above to water.

    asked on April 26, 2013
  58. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 28, 2018
  59. Math

    Michaela walked 2/5 mile to the store in 1/4 hour. What is the walking pace?

    asked on March 17, 2016

    Book april morning Describe both sides of the Boiled pudding controversy in town. What does this reveal about the town?

    asked on October 24, 2013
  61. chemistry

    Calculate the increase of entropy in J/K when 8.6 mole of C 2 H 5 OH melts at (-114) o C and 1 atm. ΔH fus = 5.02 kJ/mol

    asked on March 31, 2013
  62. Trig

    In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

    asked on December 13, 2011
  63. Science

    Index of refraction is defined as the ratio of the speed of light in free space and its speed in the medium. What is the speed of light in a medium with n= 1.33?

    asked on May 2, 2019
  64. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 27, 2018
  65. Math

    Calculate the indicated Riemann Sums for the function g(x)=4-x^2 a)one rectangle b)two rectangles

    asked on July 24, 2018
  66. Physics, need help now

    A car going 15 m/s is brought to rest in a distance of 3 m as it strikes a pile of dirt. How large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?

    asked on October 21, 2017
  67. Chemistry II

    This is what I have. Could you please correct my work? Thank you. Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). reduction Ni²⁺(aq) + 2 e⁻ ⇌ Ni(s) ; E°_red = -0.25V -oxidation Cd(s) ⇌ Cd²⁺(aq) + 2 e⁻ ; E°_ox = 0.40V (negative

    asked on April 28, 2010
  68. Physics

    In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given

    asked on November 10, 2016
  69. Chemistry

    Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M HCN(aq) with 0.2 M NaOH At 0.00 mL of NaOH At 85 mL of NaOH. At 150 mL NaOH. At 160 mL of NaOH

    asked on March 12, 2015
  70. programming logic

    The No Interest Credit Company provides zero-interest loans to customers. (It makes a profi t by selling advertising space in its monthly statements and selling its customer lists.) Design an application that gets customer account data that includes an

    asked on December 5, 2013
  71. math

    a variable y varies directly as the square root of a varies x,and equals 6 when x=4 find y when x=25

    asked on November 20, 2014
  72. Math

    t) Let a , b , c and y be the three dimensional vectors a =4j +2k ,b =−3i +4j +4k ,c =3i −j ,y =8i −7j Perform the following operations on these vectors: (a) c⋅a +a⋅y = (b) (a ⋅b )a = (c) ((c⋅c)a )⋅a =

    asked on May 6, 2018
  73. physics-can anyone solve this please

    3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a

    asked on November 23, 2013
  74. Us history

    Define unicameral legislature and bicameral legislature. Which type of legislature did must states have? I cant find what type of legislature did the states have

    asked on October 13, 2013
  75. Statistics

    Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.34, P(B) = 0.41, P(A | B) = 0.2

    asked on June 8, 2013
  76. physics

    suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

    asked on August 19, 2012
  77. Calculus

    A particle is moving along the curve y = 2 √{3 x + 7}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

    asked on October 26, 2010
  78. Calculus

    1/f = 1/p + 1/q What is the rate of change of p with respect to q if q=2 and f=4?

    asked on October 10, 2008
  79. Math

    A flag has a length of 3 1/3 feet when the width is 1 5/6 feet. Write the ratio of the length to the width as a fraction in simplest form.

    asked on June 23, 2016
  80. Chemistry

    How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?

    asked on May 10, 2015
  81. Middle School Math

    My home work problem is 3g+5=17 my answer is -20. A I correct.

    asked on December 11, 2014
  82. math

    the width of a rectangle is 4cm and the length is 8 cm if both the width and the length are increased by equal measures, the area of the rectangle is increased by 64 cm 2. find the length and width of the larger rectangle

    asked on October 26, 2014
  83. Art History

    What may have been one cause for the relative lack of artistic production in Florence during the High Renaissance (after the death of Lorenzo), and the relative increased artistic production in Rome during this period?

    asked on February 24, 2013
  84. Urgent Chem Help

    A certain substance has a heat of vaporization of 55.30 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?

    asked on February 10, 2013
  85. algebra

    A boat can travel 114 miles upstream in the same time that it can travel 186 miles downstream. If the speed of the current is 6 miles per hour, find the speed of the boat without a current.

    asked on August 17, 2011
  86. statistics

    3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

    asked on June 20, 2011
  87. Math 11th Grade

    Use Demoivre's Theorem to find the fourth roots of -16. Leave the four roots in trigonometric form. How the heck do i do this?

    asked on April 3, 2011
  88. math

    Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice

    asked on December 5, 2008
  89. Calculus

    C(x) = 16x^(1/2) + x^2/1000 Find x to meet the minimum cost

    asked on October 13, 2008
  90. chemistry

    The power of the equation ΔG° = –RT ln(K) is that K can be determined from tabulated values of ΔG°f. Use the tabulated values of the Gibb's energy to determine K for the reaction, 2AB(l) ↔ 2A(g) + B2(g), at 298K. (R=8.314 J/K mol or R=0.008314 kJ/K

    asked on March 15, 2015
  91. Physics

    A glass block has a refractive index of 1.49. What is the critical angle for the block?

    asked on November 18, 2014
  92. History

    How did American debates about foreign policy in the 1790s reflect the beliefs of the political parties? i think it tells poltical parties what to change ,but i need more info.

    asked on October 22, 2013
  93. trig/sig figs

    There are 60" in 1', 60' in 1°, and 2π radians in 360°. Convert arc-seconds into radians. KEep 6 significant figures. If someone could help and walk me through this process, it would be soooo appreciated!

    asked on January 17, 2013
  94. astronomy/conversion

    There are 365.25 days in a year, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Convert years into seconds. Show your work and keep 5 significant figures. Ok, so finding it is easy (multiply 24, 60, 60 and 365.25) but how does the

    asked on January 17, 2013
  95. physics

    water leaves a hose at a rate of 1.5kg/s with a speed of 20m/s and is aimed at the side of a car, which stops it (splashing back is ignored). what is the force exerted by the water on the car?

    asked on August 28, 2012
  96. statistics

    2. A teacher wants to investigate whether there is a difference between male and female students in the amount of time they spend studying for statistics. The table below shows the amount of time students spend studying statistics each week. The amounts of

    asked on June 15, 2011
  97. Physics

    When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in

    asked on February 23, 2011
  98. Math

    write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

    asked on January 6, 2011
  99. math

    One of your friends is heading north for the Christmas holiday and the other friend is heading south. If their destinies are 1029 miles apart and one car is traveling at 45 miles per hour and the other car is traveling at 53 miles per hour. How many hours

    asked on December 3, 2010
  100. vocabulary skills

    the greek combining form -pathy means: 1.abnormal discharge. 2.tumor arising in or composed of. 3.disease of. 4.treatment of.

    asked on November 22, 2010


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