Popular questions and responses by Charlie
  1. Chemistry

    The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)? A) 0.40 M B) 0.10 M C) 0.20 M D) 0.25 M E) 0.36 M The answer is supposedly C, but I got A.

    asked on December 8, 2009
  2. Math

    A rectangular prism is being designed to have a volume of 36 cubic units. Find the minimum surface area in square units for the prism if the edge lengths are positive integers.

    asked on June 22, 2017
  3. History

    Which best analyzes Nixon’s involvement in Vietnam with the decision to pass the War Powers Resolution? a. The My Lai Massacre convinced representatives to force the president to disclose military information. b. The end of the Vietnam War led to a

    asked on August 21, 2018
  4. History

    Which reveals problems in South Vietnam during the early 1960s? a. The election of Ho Chi Minh to the presidency caused turmoil and disagreement. b. The corrupt President Ngo Dinh Diem was overthrown and assassinated. c. The Gulf of Tonkin attack led the

    asked on August 20, 2018
  5. history

    Which identifies why the Nixon administration decided to bomb Cambodia? a. North Vietnamese troops were using trails into Cambodia to get supplies. b. Cambodia secretly decided to ally with North Vietnam and planned to attack US forces. c. Ho Chi Minh was

    asked on August 21, 2018
  6. History

    Which best defines petro-economics? a. a nation’s industrial output that stays consistent despite market turmoil b. the influence of oil wealth in shaping economic and political climates c. the gross national product of countries that produce marble and

    asked on August 21, 2018
  7. history

    Which were examples of the counterculture in America in the 1960s? (Select all that apply.) a. Patriotic Americans marched in support of the Vietnam War. b. Feminist groups fought for better positions in the workplace for women. c. The Ohio National Guard

    asked on August 20, 2018
  8. mathematics

    Linda ran 18 laps around the track. Dori ran only one half as many laps as Linda ran. How many laps did Dori run?

    asked on June 26, 2020
  9. history

    What was the Tet Offensive? a. A combined North Vietnamese and Chinese attack on the American navy in the Gulf of Tonkin b. An all-out invasion of North Vietnam by South Vietnamese and American troops c. An American bombing campaign against Communist

    asked on August 20, 2018
  10. Chemistry

    Consider the following reaction: 2NiO (s)--> 2Ni(s) + 2O2 (g) If O2 is collected over water at 40.0 C and a total pressure of 752 mmHg, what volume of gas will be collected for the complete reaction of 25.67 g of NiO? I am struggling to set up this

    asked on December 7, 2009
  11. history

    Who was Douglas MacArthur? A. an ambitious commander of Allied forces in Korea who was dismissed by President Truman for his vocal criticisms of Truman’s handling of the war B. a noted statesman and philanthropist who oversaw the rebuilding of postwar

    asked on August 21, 2018
  12. Trig

    A 12 foot ladder leans against a building. The top of the ladder leans against the wall 10.5 feet from the ground. What is the angle formed by the ground and the ladder? Assume its a right triangle.

    asked on April 17, 2013
  13. fourth grade math

    round this number to the nearest thousand 409,614

    asked on September 14, 2011
  14. Physics

    1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to

    asked on December 6, 2014
  15. Calculus

    A trough is 15 ft long and 4 ft across the top, as shown in the figure. Its ends are isosceles triangles with height 3 ft. Water runs into the trough at the rate of 2.5 ft^3/min. How fast is the water level rising when it is 2 ft deep?

    asked on February 6, 2014
  16. chemistry

    in the reaction 2Na + Cl2 --> 2NaCl how many grams of NaCl are produced when 25 g. of sodium reacts completely to form NaCl?

    asked on May 17, 2011
  17. math

    a clock strikes only in the hour (once at 1.00,twice at 2.00 etc) how many times will it strike in one 24 hour day? please explain,thanks

    asked on August 6, 2013

    A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. Which chemical or element will have the largest number of moecules?

    asked on June 21, 2010
  19. Physics capacitance

    I know that to solve: f=1 over 2 pi sqrt LC for C, I have to use C= 1 over L(2 pi f)^2 Can someone take me through the rearranging please. Thanks.

    asked on May 7, 2009
  20. algebra

    Solve this equation for x. 0.5(5-7x) = 8-(4x+6)

    asked on November 18, 2015
  21. Dimensionless parameters

    The drag, D, on a sphere located in a pipe flow through which a fluid is flowing to be determined experimentally. Assume that drag is a function of the sphere diameter, d, the pipe dianeter, H, the fluid velocity, V, and the fluid density, p. a) What

    asked on March 27, 2014
  22. Physics

    A 10 kg monkey wishes to climb a 7.15-meter high vine. The vine will break if the tension exceeds 110 N. The monkey starts from rest and exerts a constant force on the rope as he pulls himself upward. What is the shortest amount of time in which the monkey

    asked on April 23, 2012
  23. Math

    What percentage of the data falls outside 1 standard deviation of the mean?

    asked on June 7, 2011
  24. math

    Tell which real number corresponds to the situation: During a month, a person withdraws $350. what is the corresponding # for this sentence?

    asked on November 14, 2010
  25. Biology

    What differences would you expect to see in a population made up of individuals whose chromosomes experience crossing-over frequently compared with a population made up of individuals whose chromosomes do not cross over?

    asked on January 6, 2010
  26. Physics

    If a space station must "provide one sixth the magnitude of the acceleration due to gravity on Earth" Can I use 9.81ms^-2/6 or is that too simple? Thanks.

    asked on October 9, 2008
  27. physics

    While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m. At what time

    asked on September 29, 2008
  28. Physics

    A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 16.6 m above the river, while the opposite side is a mere

    asked on February 8, 2008
  29. chemistry

    Calculate the rms speed of NF3 molecules at 27 ∘C.

    asked on November 10, 2019
  30. Government

    Why is the power shown in marbury v madison an important part of the us system of government? A. It established the right of the legislature to make laws B. It established the right of the executive to veto laws C. It established the right of the judiciary

    asked on February 15, 2019
  31. history

    Which most accurately describes the Vietnam War? a. Communism spreading in Southeast Asia led to a power struggle between the superpowers that escalated into an ongoing bloody conflict. b. The French occupiers of Vietnam allied with Communist Chinese

    asked on August 20, 2018
  32. Physics

    1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.

    asked on December 6, 2014
  33. math

    Water is leaking out of an inverted conical tank at a rate of 6700 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 meters and the diameter at the top is 3.5 meters. If the

    asked on November 12, 2014
  34. Algebra

    One month Ivanna rented 5 movies and 3 video games for a total of $29. The next month she rented 2 movies and 12 video games for a total of $71. Find the rental cost for each movie and each video game. Rental cost for each movie? Rental cost for each

    asked on March 30, 2014
  35. Algebra

    In a recent year, 16.3% of all registered doctors were female. If there were 47,600 female registered doctors that year, what was the total number of registered doctors? Round your answer to the nearest whole number.

    asked on March 30, 2014
  36. Physics

    A hockey puck is hit on a frozen lake and starts moving with a speed of 12.2 m/s. Ex- actly 6.70 s later, its speed is 6.20 m/s. The acceleration of gravity is 9.81 m/s2 . a) What is its average acceleration? Answer in units of m/s2

    asked on February 3, 2014
  37. Math

    A production crew is assembling a three-level platform inside a stadium for a performance. The platform has the dimensions of 4x long and 2x wide, the middle box has the dimensions of 6x long and 4x wide, and the bottom box has the dimensions of 8x long

    asked on October 9, 2013
  38. Chemistry

    Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO

    asked on May 1, 2013
  39. Chemistry

    Uranium-235 can be separated from U-238 by fluorinating the uranium to form UF6 (which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes. Calculate the ratio of effusion rates for

    asked on December 7, 2009
  40. physics fields and charges

    I'm stumped: 2 charges, Q1 and Q2, equal magnitude, but different signs (not assigned) lie on a line, x axis, a known distance apart. Segment pq lies centrally on the line, distance apart is known. An electron is released at p from rest, and passes q at a

    asked on February 3, 2009
  41. pre-calculus

    A flagpole at right angle to the horizontal is located on a slope that makes an angle of 12∘ with the horizontal. The pole's shadow is 16 meters long and points directly down the slope. The angle of elevation from the tip of the shadow to the sun is

    asked on April 30, 2020
  42. History

    Please check my answers! 1. Why did some people oppose internment camps during World War II? A. The camps were overcrowded. B. The camps tortured people as prisoners of war. C. There were too many children held in the camps. D. The camps held people who

    asked on February 13, 2019
  43. English

    Why is Granny humming again at the end of "Blues Ain't No Mockin Bird"? A) She is angry at the cameramen. B) She is glad Grandaddy got rid of the cameramen. *** C) She always hums when she makes rum cakes.

    asked on December 4, 2017
  44. Language Arts

    Hello, I need help on this. Please help me. I am not coming here for answers like most people, but if you want to give me the answer then I will gladly except it and edit it into my owns words. For you that are on Connexus, you may need help too. So yeah.

    asked on May 15, 2017
  45. Algebra

    There are 3 red chips and 2 green chips. You win the game if you take out all the chips of the same color. What is the probability you take all the green chips out?

    asked on November 16, 2016
  46. Algebra

    In a set of 6 numbers, {-2, -1, 0, 1, 2, 3}, what is the probability the product of any two numbers is zero?

    asked on November 16, 2016
  47. Statistics

    a ball rolls off a table and falls 0.80 m to the floor, landing with a speed of 4.5 m/s. 1. What was the initial speed of the ball? 2. What initial speed must the ball have if it is to land with a speed of 5.8 m/s? 3. What is the magnitude of the

    asked on October 9, 2016
  48. logarithm functions

    use the properties of logarithms to expand the expression as sum, difference or multiple of logarithms. Simplify. a.log(x^3/2) b.log base4 16a

    asked on September 11, 2016
  49. maths

    there are 12 sweets in a bag. 7 of the sweets are strawberry flavou. 5 of the sweets are lime flavour. harriet takes 2 sweets at random work out the probability that she takes at least one strawberry sweet.

    asked on January 14, 2016
  50. Physics

    A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the

    asked on October 21, 2014
  51. Physics

    A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the

    asked on October 21, 2014
  52. math

    There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are

    asked on July 7, 2014
  53. Geometry

    Mike and Lani stand 21.2 meters apart. From Mike’s position, the angle of elevation to the top of the Eiffel Tower is 40°. From Lani’s position, the angle of elevation to the top of the Eiffel Tower is 38.5°. How many meters high is the Eiffel Tower?

    asked on February 23, 2013
  54. math

    A bus stopped at Gulgong, 25% of the passengers got off the bus and 3 new passengers got on. At the next stop,3 quarter of the passengers got off the bus and 11 new passengers got on. The bus then had 17 passengers.How many passengers did the bus have just

    asked on November 17, 2012
  55. physics

    The two angled ropes used to support the crate in Figure P5.7 can withstand a maximum tension of 1500 N before they break. What is the largest mass the ropes can support?

    asked on October 8, 2012
  56. Physics

    Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated inside a region of uniform magnetic field of 0.395 T. The total resistance of the loop is 0.690 Ω. Calculate the force required

    asked on March 31, 2012
  57. trigonometry

    The side of a lake has a uniform angle of elevation of 15 degrees 30 feet. How far up the side of the lake does the water rise if the height of the lake increases by 7.3 feet during flood season.

    asked on October 13, 2011
  58. chemistry

    iF 50.0 g of iron (II) carbonate react completely with hydrochloric acid, how many grams of carbon dioxide gas may be produced?

    asked on July 3, 2011
  59. statistics

    Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18

    asked on April 3, 2011
  60. Chemistry

    You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?

    asked on March 29, 2011
  61. math

    How do i find the extrema (local maximum and minimum) by using the first derivative of: x^3-(3/2)x^2?

    asked on February 16, 2011
  62. 9th grade science

    A landslide may be caused when friction is ______ by moisture

    asked on January 4, 2011
  63. College Physics

    A mass of 0.4 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the velocity of the mass when at its maximum displacement of 0.1 m?

    asked on October 24, 2010
  64. physics

    1.calculate th speed of waves in water that are 0.4m apart and have a frequency of 2hz? 2. sound waves travel at approximately 340m/s what is the wavelength of a sound with a frequency of 20Hz? what is the wavelength of a sound with a frequency of 20 kHz?

    asked on March 31, 2011
  65. Physical Science

    What is cracking and reforming? For what purposes are either or both used by the petroleum industry

    asked on September 29, 2009
  66. Physics

    I have to plot a graph of Pressure gradient vs average velocity (water in a pipe, I have all the data). I plan to put the average velocity on the x axis, since I could control that better in an experiment. Do you agree/ Thanks. Charlie

    asked on August 10, 2009
  67. Physics

    The last stage in the fusion of hydrogen to form helium in the Sun involves the formation of an ƒ¿-particle (4He) from two 3He nuclei: 3He + 3He ¨ 4He + p + p The binding energy for 3He is 2.57 MeV per nucleon and that for 4He is 7.07 MeV per nucleon.

    asked on June 18, 2009
  68. Physics

    In an elastic collision: mass a is 1kg, and is moving at 100ms^1 in the +ve x direction when it hits mass b, 10kgs at rest. Given: mass a moves off at 80 ms^1 in the -ve x direction. What's the final velocity of mass b. Using cons of momentum, i say 2 ms^1

    asked on June 16, 2009
  69. physics, fluids

    would I be correct if I explained the 3 expressions in Bernoulli's equation as representing: P is the pressure 1/2*rho*v squared is the kinetic energy rho*g*h is the gravitational kinetic energy. Or is it more complicate than that. Thanks

    asked on January 24, 2009
  70. Physics

    A movie stunt man (mass 82.3 kg) stands on a window ledge 5.69 m above the floor. Grabbing a rope attached to a chandelier, he swings down to grapple with the movie’s villain (mass 72.3 kg), who is standing directly under the chandelier. (Assume that the

    asked on March 13, 2008
  71. science ( physics)

    hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed

    asked on May 30, 2007
  72. Geography

    different types of government in Sub-Region (the eastern mediterranean) world geography

    asked on December 12, 2019
  73. math

    Is it possible for a negative angle to have a compliment or supplement? for example, the angle -54°

    asked on November 17, 2019
  74. World History

    I need help developing a thesis statement for an essay. I could use some live, interactive help.

    asked on October 22, 2019
  75. Algebra

    Let f(x) = 9 – x, g(x) = x^2 + 4, and h(x) = x – 2. g(f(2))

    asked on February 26, 2019
  76. Algebra

    I have these algebra problems that I have been stuck on for over a week, and I'm beginning to fall behind. Any help will be much appreciated. I am told to compute the following: Let g(x) = 3x, and h(x) = x^2 + 1. The first one was g(-1), and I got

    asked on February 26, 2019
  77. Algebra

    Compute the following: Let g(x)=3x, and h(x)=x^2+1. h(3) Please show work & help me understand.

    asked on February 14, 2019
  78. Algebra

    Compute the following: Let g(x)=3x, and h(x)=x^2+1. g(-1) Need help with understanding, please show what you did.

    asked on February 14, 2019
  79. Math, algerbra,precalculus, logaritums

    Is a logarithm always equal to a power? yes or no?

    asked on February 9, 2019
  80. Precalculus, algerbra 2, investment,

    You have 4 different investment options 4% interest 7% compound continuously 19% annually 5% every month You have 1000 dollars how long does it take for the value to double in each other investment options? How long does it take until 1000 becomes 1800?

    asked on February 6, 2019
  81. Math, algerbra 2, algerbra, precalculus, homework

    You have 4 different investment options 4% interest 7% compound continuously 19% annually 5% every month You have 1000 dollars how long does it take for the value to double in each other investment options? How long does it take until 1000 becomes 1800?

    asked on February 6, 2019
  82. Precalculus, algerbra 2, investment,

    A stuffed animal dealer tells you that a fish he bought for $8 four years ago is now worth $200 follow the steps below to find the effective yield for this investment. Begin with the equation 8(1+r) ^4=200.Solve for (1+r) ^4 Take the common logarithm of

    asked on February 6, 2019
  83. precalculus, math, intrest, algerbra 2

    At the show a basketball card dealer tells you that a vintage card increases in value by a factor of 10 every 9 years.If the card is now worth $32, how long ago did she buy it?(Hint: Remember that the value is multiplied by 10 every 9 years, not every

    asked on February 6, 2019
  84. math.

    Abel ,Belle and Cindy have $408 altogether. Belle has $7 more than Cindy And $5 more than Abel. how much does Abel have?

    asked on November 7, 2018
  85. Math

    Find an equation of the line. Write the equation in the standard form. Through (7,6); parallel to 4x-y=9

    asked on August 22, 2018
  86. history

    Which analyzes why some historians believe that the federal civil defense administration used propaganda to reduce the general public concerned about nuclear warfare? a. Historians believe that the FCDA generated reports that underestimated the missile gap

    asked on August 21, 2018
  87. history

    What was Japanese Reconstruction? a. It was the decision to end the Japanese monarchy and establish a US-controlled puppet dictator. b. It was the occupation of Japan by the United States to expand military dominance in the Pacific. c. It was an attempt by

    asked on August 21, 2018
  88. science

    which physical properties are characteristic of metal

    asked on January 24, 2018
  89. Math

    A) Write a numerator for each fraction to make the fraction close to, but not equal to, 1/2. Then, write another numerator to make each fraction close to, but greater than 1. 1) _/22 2) _/43 3) _/17 My Answers: 1) 10, I believe. 2) 20? I dont know, please

    asked on November 13, 2017
  90. math

    How many degrees are in the smaller angle formed by the minute and hour hands on a clock at 12:30?

    asked on August 10, 2017
  91. Early Childhood

    When reading aloud to a group of toddlers at the beginning of the year, why would the teacher choose to read a book that students may have already heard at home? A. The teacher wants the students to feel comfortable and it will help create a rapport. B.

    asked on May 16, 2017
  92. Number problems

    It is a number less than 50 it's a 2 didit number 3 is a factor of the number the sum of its digits is one third of the number

    asked on May 2, 2017
  93. math

    6=e^5r I have no idea how to do this please help Thanks

    asked on April 18, 2017
  94. math

    If you invest $1000 at 3% interest compounded semiannually. when will the investment be worth $1500 ? 1000(1 +.03/2)^q= 1500 not sure if this is right ? thanks

    asked on April 18, 2017
  95. physics

    A hippo has a mass of 6000kg. When standing on 4 feet, how much pressure is exerted on the ground? Assume each foot has an area of 0.10 square meter. Show your work.

    asked on February 6, 2017
  96. maths

    Calculate the area of the following triangles, giving your answers to 2 decimal places: (a) The right-angled triangle with sides a=16, b=63, and c=65. (b) The triangle with angle α = 40° and adjacent sides b=10 and c=20.

    asked on November 18, 2016
  97. math

    A 5.35 kg steel block is spun around a motor at 36.5 rpm. The angular acceleration of the block is -2.14 rads/s^2 and it takes 1.79 s for the block to come to a complete stop. What is the angular displacement while the block slows to a stop?

    asked on October 23, 2016
  98. math

    a board is 19ft 9inches long is cut into nine equal pieces to the nearest inch. how long is each piece? how many inches of board will be left over?

    asked on July 21, 2016
  99. math

    a+b=76 a-b=38 a/g=?

    asked on May 21, 2016
  100. Chemistry

    How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the

    asked on May 7, 2016


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