Popular questions and responses by mel
  1. physics

    A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000 N/m. The block slides down the ramp and compresses the

    asked on March 11, 2012

    Yield to call Six years ago, the Singleton Company issued 20-year bonds with a 14 percent annual coupon rate at their $1,000 par value. The bonds had a 9 percent call premium, with 5 years of call protection. Today, Singleton called the bonds. Compute the

    asked on September 18, 2007
  3. physics

    A block weighing 8.3 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction surface? A weight W is now placed on the block and 8.2 is needed to push them both at constant velocity. What is the weight W of the

    asked on March 19, 2010
  4. chem

    You are given the following data. P4(s) + 6 Cl2(g) 4 PCl3(g) H = -1225.6 kJ P4(s) + 5 O2(g) P4O10(s) H = -2967.3 kJ PCl3(g) + Cl2(g) PCl5(g) H = -84.2 kJ PCl3(g) + 1/2 O2(g) Cl3PO(g) H = -285.7 kJ Calculate H for the following reaction. P4O10(s) + 6

    asked on December 1, 2007
  5. Urgent math help!!

    What is the value of sinθ given that (−3,4) is a point on the terminal side of θ ? −3/5 3/5 4/5

    asked on April 13, 2017
  6. Physics

    what maximizes our ability to recover elastic potential energy?

    asked on February 21, 2016
  7. Quick calc question

    The Riemann sum, the limit as the maximum of delta x sub i goes to infinity of the summation from i equals 1 to n of f of the quantity x star sub i times delta x sub i , is equivalent to the limit as n goes to infinity of the summation from i equals 1 to n

    asked on February 11, 2016
  8. Chemistry

    Consider the following unbalanced equation. H1+(aq) + Fe(s) H2(g) + Fe2+(aq) What is the balanced oxidation half-reaction? What is the balanced reduction half-reaction? What is the balanced overall cell reaction?

    asked on June 8, 2012
  9. Calculus

    The position function of a particle in rectilinear motion is given by s(t) = 2t^3 – 21t^2 + 60t + 3 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.

    asked on January 8, 2016
  10. calc

    Given the position function, s of t equals negative t cubed divided by 3 plus 13 times t squared divided by 2 minus 30 times t, between t = 0 and t = 9, where s is given in feet and t is measured in seconds, find the interval in seconds where the particle

    asked on January 8, 2016
  11. Physics- Elena please help!

    Part of a roller-coaster ride involves coasting down an incline and entering a loop 30.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider is equal in magnitude to

    asked on October 27, 2012
  12. chem

    One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and 100.°C, 40.66 kJ of heat is released. If the density of H2O(l) at this temperature and pressure is 0.996

    asked on November 26, 2007
  13. Quick calc question

    Use the table below to evaluate the derivative with respect to x of g of f of 2 times x at x = 1. x 1 2 3 4 f(x) 6 1 8 2 f ′(x) 6 1 8 2 g(x) 1 4 4 3 g ′(x) 9 5 5 –4

    asked on January 30, 2016
  14. math-calculus

    A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

    asked on December 17, 2012
  15. science

    how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M stock NaOH solution?? I assume that you want the volumes rather than the mechanics of carrying it out? a) How many moles do you need in the 500 ml to have 0.200 M? b) What volume of 15.0 M

    asked on April 5, 2007
  16. Math

    Topic: Water Footprint. City of New York 2011 rate of 7.64/100 cubic feet of water. Calculate the cost of each of the following based on this rate. Use the conversion factor of 7.48 gallons per cubic food. A. A standard washing machine uses approximately

    asked on April 24, 2017
  17. chemistry

    water vapor and nitrogen dioxide gas NO2 are cimbined to manufacture ammonia. a by product of this reaction is oxygen gas. write a balanced equation for this reaction. i do not understand this at all please help me figure it out

    asked on April 16, 2009
  18. physics

    Hey can someone help with this. A movie stuntwoman drops from a helicopter that is 30.0 m above the ground and moving with a constant velocity whose components are 10.0 m/s upward and 15.0 m/s horizontal and toward the south. You can ignore air resistance.

    asked on September 26, 2008
  19. Algebra

    How to write |y|-2=0 in standard form?

    asked on February 12, 2017
  20. Quick calc question

    Which of the following definite integrals could be used to calculate the total area bounded by the graph of y = 1 – x2 and the x-axis? the integral from 0 to 1 of the quantity 1 minus x squared, dx plus the integral from 1 to 2 of the quantity 1 minus x

    asked on February 12, 2016
  21. Quick calc question

    Find the x-coordinates where f '(x) = 0 for f(x) = 2x + sin(4x) in the interval [0, π].

    asked on January 29, 2016
  22. Calculus

    What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and

    asked on January 8, 2016
  23. Physics

    Approximately 4x10^9 kg of matter is converted into energy in the sun per second. Express the power output of the sun in watts.

    asked on September 27, 2012
  24. algebra 2

    If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x + y = 2 3x + 2y = 9

    asked on August 16, 2012
  25. programming and visual basics

    Using pseudocode or a flowchart write a program that does the following: Design the logic for the game Hangman, in which the user guesses letters in a hidden word. Store the letters of a word in an array of characters. Display a dash for each missing

    asked on March 30, 2016
  26. World History Honors

    is this primary source ? The Black Death A Description of the Plague This first account is from Messina, and it described the arrival and initial progress of the disease. At the beginning of October, in the year of the incarnation of the Son of God 1347,

    asked on September 26, 2011
  27. college

    What is the mass of a 10.0 cm^3 cube of copper?

    asked on August 27, 2010
  28. chem

    calculate the max wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following : n=2 in nm n=4 in nm

    asked on December 6, 2007
  29. Math

    Suppose a person were to breath an average of 16 times per minute. How many years would it take for them to breath one billion times? Assume there are 365 days in one year. Round your answer to the nearest single year.

    asked on April 24, 2017
  30. Quick calc question

    Write the Riemann sum to find the area under the graph of the function f(x) = x2 from x = 1 to x = 5. 1. the summation from i equals 1 to n of the product of the quantity squared of 1 plus 5 times i over n and 4 over n 2. the limit as n goes to infinity of

    asked on February 12, 2016
  31. Quick calc question

    For f of x equals the quotient of the quantity 1 minus x and the quantity 1 plus x and g of x equals the quotient of the quantity x and the quantity 1 plus x, find the simplified form for f [g(x)] and state the domain.

    asked on January 30, 2016
  32. Calculus

    The side of a square is measured to be 10 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.

    asked on January 8, 2016
  33. Finance

    1. Following is the projected net income stream associated with the use of Zartek technology. (Note: this net income stream does not take into account that Zartek’s owners invested $2,000 to develop Zartek in Year 0.) Globus Maximus Enterprises would

    asked on December 28, 2014
  34. psychology

    Rind, B., & Strohmetz, D. (1999). Effect on restaurant tipping of a helpful message written on the back of customers’ checks. Journal of Applied Psychology, 29, 139-144. doi:10.1111/j.15591816.1999.tb01378.x This is the article to use to answer these

    asked on July 6, 2014
  35. Psychology

    Wookey, M. L., Graves, N. A., & Butler, J. C., (2009). Effects of a sexy appearance on perceived competence of women. The Journal of Social Psychology, 149, 116-118. doi:10.3200/SOCP.149.1.116-118 This is the article to use 1. What are the design elements

    asked on July 6, 2014
  36. physics

    A shell is fired from the ground with an initial speed of 1.58 103 m/s at an initial angle of 31° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s

    asked on November 18, 2012
  37. Physics

    Two students are on a balcony 24.3 m above the street. One student throws a ball, b1, vertically downward at 15.8 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on

    asked on October 9, 2012
  38. science

    Mountains produced by tensional stress, like the Teton Range in Wyoming, are called

    asked on June 2, 2012
  39. Chemistry

    HELP! :) Consider the following reaction: 3A to 2B The average rate of appearance of B is given by deltaB divided by delta t. Comparing the rate of appearance of B and the rate of disappearance of A, we get Delta B divided by Delta t= ___* (-delta A

    asked on May 24, 2012
  40. physics

    A 50.2 kg child slides down a water slide with a velocity of 1.1 m/sec at the top. At the bottom of the slide, she is moving horizontally, 1.5 meters above the water. She splashes into the water 2.5 meters to the right of the bottom of the slide. a)

    asked on March 11, 2012
  41. math

    Six hundred pennies are placed in a row. If every other penny is replaced by a nickel and every third coin is replaced by a quarter, what is the final value of the 600 coins?

    asked on September 27, 2011
  42. Organic Chemistry

    Why does eugenol and d-limonene dissolve in dichloromethane?

    asked on February 11, 2011
  43. physics

    In a visit to the nation's capital, a foreign head of state travels from (−3.0, −4.0) km to (4.0, 7.0) km. She then travels with a displacement of (−5.0, -3.8) km. Calculate the her total displacement over the course of the trip. ANSWER SHOULD BE IN

    asked on December 19, 2010
  44. help!

    2cr(s) + SnCL4(aq) --> can this reaction occur if so write the balanced equation if it doesnt explain why

    asked on April 16, 2009
  45. english

    can you give me a good sentence using the word biology and biography

    asked on February 1, 2009
  46. chem

    Consider the following cyclic process carried out in two steps on a gas. Step 1: 48 J of heat is added to the gas, and 20. J of expansion work is performed. Step 2: 70. J of heat is removed from the gas as the gas is compressed back to the initial state.

    asked on December 2, 2007
  47. Finance

    Interest rate premiums A 5-year Treasury bond has a 5.2 percent yield. A 10-year Treasury bond yields 6.4 percent, and a 10-year corporate bond yields 8.4 percent. The market expects that inflation will average 2.5 percent over the next 10 years (IP10 _

    asked on September 15, 2007
  48. algebra

    If f(x)=x+7 and g(x)=1/x-13, what is the domain of (f x g)(x)? Please explain.

    asked on April 10, 2019
  49. Math

    Can someone get the math for the worksheet? I'm havibg troubles getting the answers and how to get them. Thxs!

    asked on March 7, 2019
  50. Calculus

    How do I take the indefinite integral of (5-x)/(2x^2+x-1)? I've tried splitting it into two integrals and even completing the square on the bottom but neither of those led me anywhere. Help?

    asked on February 7, 2018
  51. Chemistry

    A solution of ammonia and water contains 3.70×1025 water molecules and 7.10×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

    asked on September 9, 2015
  52. Math

    A custodian pours1/8 gallon of cleaning solution into each pail of water that she uses. how many pails of water and cleaning solution can the custodian make using 16 gallons of cleaning solution?

    asked on March 25, 2015
  53. math

    Nathan deposited 7/9 of his allowance into his savings account. He spent the remaining amount, or $2.50. How much did Nathan deposit into his savings account? Should I multiply 7/9 *2 1/2 or 7/9 * 250

    asked on February 27, 2015
  54. Statistics

    Service times for customers at a post office follow some right-skewed distribution with mean 2.91 minutes and standard deviation 1.74 minutes. (a) Can you calculate the probability that the average service time for the next two customers is less than 2.64

    asked on November 4, 2014
  55. Calculus

    Find the value of a so that the tangent line to y = ln(x) at x = a is a line through the origin. I am unsure how to go about this.

    asked on October 19, 2014
  56. psychology

    Leigh, B. C. (1993). Alcohol consumption and sexual activity as reported with a diary technique. Journal of Abnormal Psychology, 102, 490-493. doi:10.1037/0021-843X.102.3.490 This is the article to utilize when answering the questions 1. What are the

    asked on July 6, 2014
  57. PHS 105

    At a particular instant, two asteroids in inter-stellar space are a distance r = 20 km apart. Asteroid 2 has 10 times the mass of asteroid 1, m2 = 10 m1. 1. If the acceleration of the asteroid 1 toward the asteroid 2 is 1.0 m/s2 , what is the acceleration

    asked on March 17, 2014
  58. Physics

    After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 3.02 km away. Her dog runs ahead, at twice the speed, reaches the campground and turns around until it meets her again. Then, the dog proceeds to

    asked on February 3, 2014
  59. accounting

    1. Use the general journal to journalize the following transactions completed during July of the current year. 2. Post from the general journal to the general ledger. Using the following steps. a. A. Write the current year and July 1 in the Date column.

    asked on September 25, 2012
  60. Art

    Hello, i am suppose to look at the artwork, Winged Genie Fertilizing a Date Tree. I have to identify the elements of art in this sculpture. I said the elements of art used in this sculpture are form, texture, shape, and line. Am i right? Did i leave

    asked on May 15, 2012
  61. Fine Arts

    The question asks, What are some of the similarities and differences between scroll paintings in China and Japan. I have the similarities down, but i cant find any differences. Help?

    asked on May 6, 2012
  62. World History Honors

    My assignment: Imagine that Sita, Mahavira, Siddhartha Gautama, Confucius, and Laozi were all invited to dinner at the home of Brahma. Write a 600-word dialogue between them as they argue about what they should eat for dinner and who should sit next to

    asked on August 24, 2011
  63. Algebra

    x^2 + kx - 19 Find all values of k so that each polynomial can be factored using integers.

    asked on May 5, 2011

    What is the molarity of an HCl solution if 49.0 mL is completely titrated by 68.4 mL of an NaOh solution whose concentration is 0.333 M?

    asked on June 8, 2010
  65. chemistry

    The concentration of various cations in seawater in moles per liter are Na+ (0.46M); Mg2+ (0.056M); Ca2+ (0.01M); Al3+ (4x10^-7M); Fe3+ (2x10^-7M) If enough OH- ion is added to precipitate 50% of the Mg2+, what mass of precipitate will be obtained from one

    asked on March 30, 2010
  66. MATH

    Tara says that 1/2 of a salad is always the same amount. Lynn says that it could be different amounts, depending on how large the salad is. Who is correct? Why?

    asked on January 25, 2010
  67. eng

    what is the primary focus of the nonintervention perspective

    asked on September 10, 2009
  68. comm

    notation for subsequesnt multiple authors in a citation

    asked on March 20, 2009
  69. chemistry

    caculate the number of moles in 8200 g of iron

    asked on March 16, 2009
  70. Algebra 1

    "Solve each system algebraically. Identify each system as cosistent and dependent, cosistent and independant, or inconsistant." my teacher didn't go over this in class and i have no idea what it means! here are the problems: #1) 2f+3g=11 f-g=(-7) #2)

    asked on February 16, 2009
  71. english

    While there may be opposition from students and parents, dress codes should be enforced in schools as they encourage discipline among students. This is my thesis statement for an essay :dress codes in schools". how can I support it with compelling

    asked on May 27, 2008
  72. chemistry

    Using data from this chapter, calculate the change in energy expected for each of the following processes Rb(g) + Br(g) Rb+(g) + Br -(g)

    asked on December 7, 2007
  73. chem

    calculate the change in energy expected for each of the following processes 1. Rb(g) + Br(g) --> Rb+ (g) + Br- (g) 2. Mg(g) + I(g) --> Mg+ (g) + I- (g) 3. Mg+ (g) + I(g) -> Mg+2 (g) + I- (g) 4. Mg(g) + 2I (g) -> Mg+2 (g) + 2I- (g) in kJ

    asked on December 6, 2007
  74. chem

    Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2755 kJ/mol), and H2

    asked on November 27, 2007
  75. chem

    On Easter Sunday, April 23, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate. 2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g) (a) Calculate H° for this reaction. kJ

    asked on November 26, 2007
  76. chem

    The specific heat capacity of silver is 0.24 J/°C·g. (a) Calculate the energy required to raise the temperature of 140.0 g Ag from 273 K to 295 K. J (b) Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0°C (called the molar heat

    asked on November 26, 2007
  77. chem

    in the equation 2SO2 + O2 -> 2SO3 how do you find if work done is >,

    asked on November 20, 2007
  78. chem

    A piece of solid carbon dioxide, with a mass of 6.2 g, is placed in a 4.0 L otherwise empty container at 21°C. ( a) What is the pressure in the container after all the carbon dioxide vaporizes? atm (.86 atm) (b) If 6.2 g solid carbon dioxide were placed

    asked on November 17, 2007
  79. dr. bob

    Use the data in Table 5.4 to calculate the partial pressure of He in dry air assuming that the total pressure is 1.0 atm. Assuming a temperature of 21°C, calculate the number of He atoms per cubic centimeter. atoms/cm3 .00000524 - atmospheric composition

    asked on November 17, 2007
  80. chem

    I have the following problems- write net ionic equations for reactions if no reaction write NR.... silver nitrate and ammonium carbonate sodium phosphate and potassium nitrate silver nitrate and barium chloride copper (II) chloride and sodium hydroxide

    asked on November 2, 2007

    Bond valuation Nungesser Corporation’s outstanding bonds have a $1,000 par value, a 9 percent semiannual coupon, 8 years to maturity, and an 8.5 percent YTM. What is the bond’s price?

    asked on September 18, 2007

    Current yield and yield to maturity A bond has a $1,000 par value, 10 years to maturity, a 7 percent annual coupon, and sells for $985. a. What is its current yield? b. What is its yield to maturity (YTM)? c. Assume that the yield to maturity remains

    asked on September 18, 2007
  83. physics

    A person pushes a 10 kg box from rest and accelerates it to a speed of 3.2 m/s with a constant force. If the box is pushed for a time of 2.6 s, what is the force exerted by the person? force*time=mass*changeinvelocity solve for force.

    asked on December 16, 2006
  84. math/geometry

    (use the law of sines) Solve triangle ABC if a=19, b=16, m

    asked on March 13, 2020
  85. Statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 10. Use the 68-95-99.7 rule to find out the percentage of scores less than 100

    asked on January 23, 2020
  86. stats

    I need help. I am so so lost and need the answers and step by step if possible. I have tried everything but I think I'm just.. having a huge brainfart. I need the answers and the step by step please A quiz consists of 8 multiple choice questions, each with

    asked on August 5, 2019
  87. math stats

    When 100 students at UCF were given a calculus problem that required the use of integration by parts, 95 were able to solve it. When 100 FAU students were given the same problem, 68 were able to solve it. What is the test statistic associated with the

    asked on August 5, 2019
  88. Physics

    A 60 cm long wire is oriented from east to west directly above the equator and carries a current of 5 A (toward the east). What is the magnitude and direction of the magnetic force on this wire due to the earth’s magnetic field (30 µT oriented south and

    asked on July 24, 2019
  89. Science

    A coach wants to find out the speed of the runners on the track team.Tell what simple equipment the coach need in order to do this and explain how it should be done.

    asked on January 21, 2018
  90. Pre-calculus

    Can someone help me with this equation: y = (2*10^(-44))*(e^(0.055x))?

    asked on May 6, 2017
  91. economics

    Explain why we might be concerned about the potential for the misrepresentation of costs.

    asked on March 16, 2017
  92. Social studies

    Compare the experience of farmers,coal miners,and union labores during the 1920s. What did many have in common? 1.Economic prosperity 2. Public disapproval 3. Federal assistance 4. Financial hardship I choose A is it correct Ms. Sue

    asked on March 3, 2017
  93. Algebra

    |3y+4|-|=0 Write in standard form

    asked on February 12, 2017
  94. Math

    I am struggling with how to start this problem. The following points are on the graph of: y=f(x) Use theorem to identify the corresponding points on the transformed functions. y = 2f(x-3)-2

    asked on February 4, 2017
  95. algebra

    A couple purchased a house in 2005. In 2009 the house appraised for $475,000. The couple refinanced the house in 2014 and the appraisal was $468,000. The couple determined a linear relationship existed between the the number of years since 2005 and the

    asked on February 4, 2017
  96. Social studies

    Which of the following phrases might a Republican Congress have used to describe President Johnson's Reconstruction plans

    asked on January 24, 2017
  97. Math

    Use long division to determine if the divisor is a factor of the dividend. (-x^2-94x+600)/(x+100)

    asked on January 22, 2017
  98. Physics

    During takeoff, an airplane climbs with a speed of 180m/s at an angle of 42 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining overhead. How fast is the shadow of the

    asked on September 14, 2016
  99. Language Arts

    what is the participle or participial phrase in the following sentence: The art students, brought by bus, toured the museum.

    asked on March 29, 2016
  100. science

    How can i prepare a 100ml, 0.1M phosphate buffer solution (pH = 7) out of Na2HPO4 and NaH2PO4

    asked on February 27, 2016


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