Popular questions and responses by Nicole
  1. physics

    An object with mass 3.0 kg is attached to a spring with spring stiffness constant k = 300 N/m and is executing simple harmonic motion. When the object is 0.020 m from its equilibrium position, it is moving with a speed of 0.55 m/s. (a) Calculate the

    asked on March 7, 2012
  2. Math

    A work crew of 3 people requires 3 weeks and 2 days to do a certain job. How long would it take a work crew of 4 people to do the same job if each person of both crews works at the same rate as each of the others? Note: each week contains six work days.

    asked on September 10, 2009
  3. geometry

    A tourist in France wants to visit 5 different cities. If the route is randomly selected, what is the probability that she will visit the cities in alphabetical order? Answer choice: a)120 b)1/5 c)1/120 d)1/25

    asked on April 15, 2010
  4. Buffer Solution

    You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

    asked on April 13, 2011
  5. Chemistry

    Calculate the standard enthalpy change for the reaction 2C8H18(l)+17O2(g)> 16CO(g) + 18H2O(l) Given 2C8H18(l)+25O2(g)>16CO2(g)+18H2O(l) deltaH=-11020 kj/mol 2CO(g)+ O2(g)>2CO2(g) Delta H=-566.0 kj/mol The > is supposed to be an arrow :)

    asked on November 17, 2011
  6. geometry

    HELP.... In a certain lottery, 3 numbers between 1 and 9 inclusive are drawn. These are the winning numbers. How many different selections are possible? Assume the order in which the numbers are drawn is not important. Answer choice: a.) 6 b) 84 c) 504 d)

    asked on April 15, 2010
  7. Trig

    A weight is oscillating on the end of a spring. The position of the weight relative to the point of equilibrium is given by y=1/12(cos8t-3sin8t), where y is the displacement (in meters) and t is the time (in seconds). Find the times when the weight is at

    asked on October 27, 2014
  8. statistics

    A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Their data is given below. Reference: Ref 11-4 Compute the test value for the coffee machines. Answer 2.25 5.06 6.62 4.86

    asked on May 9, 2014
  9. music

    trying to look for a 7 letter word using music notes cdeeffggaabb is this a damn trick question. best i can do is badge What about cabbage? you are a star, thank you so much

    asked on January 24, 2007
  10. math

    a 12 cm by 16 cm picture is mounted with border of uniform width on a rectangular frame. if the total area of the border is 288 cm2, what is the length of the side of the frame?

    asked on July 21, 2015
  11. chemistry

    At 23°C, Kp = 0.075 for the equilibrium: NH4HS (s) ↔ NH3 (g) + H2S (g) A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate. Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid NH4HS remains.

    asked on September 14, 2012
  12. Chemistry

    An analysis of nicotine (MW = 162 g/mol) gives 74.0% carbon, 8.65% hydrogen, and 17.3% nitrogen. What is the TRUE (MOLECULAR) formula for nicotine? All I need are the formulas!!

    asked on September 16, 2015
  13. Buffer

    You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

    asked on April 11, 2011
  14. Chemistry HELP

    What is the velocity of an electron that has a de broglie wavelength approximately the length of a chemical bond? Assume this length to be 1.2 X10^-10 m.

    asked on September 5, 2015
  15. Algebra 2

    A large asteroid crashed into a moon of a planet, causing several boulders from the moon to be propelled into space toward the planet. Astronomers were able to measure the speed of one of the projectiles. the distance (in feet) that the projectile traveled

    asked on February 18, 2015
  16. algebra

    The size of the coyote population at a national park increases at the rate of 4.6% per year. If the size of the current population is 130, find how many coyotes there should be in 6 years. Use the function f(x)=130e^0.046t

    asked on April 15, 2016
  17. physics

    The combined mass of a race car and its driver is 600. kilograms. Traveling at a constant speed, the car completes one lap around a circular track of radius 160 meters in 36 seconds. A) Based on the given information, calculate the speed of the car. B)

    asked on January 10, 2010
  18. Chemistry

    What is the mass of ethylene gycol dissolved in 5.00 kg of a 40.0% solution?

    asked on May 4, 2013
  19. Middle School Math

    The marching band is selling cases of fruit for $13 per case. a. Write an algebraic expression for the cost of f cases of fruit. b. Evaluate the expression for 250 cases. Question 17 options:

    asked on October 7, 2015
  20. English

    Identify the italicized part of the sentence. The main event will be a memory contest. subject predicate direct object indirect object predicate noun predicate adjective

    asked on October 30, 2014
  21. Math... PLEASE HELP!!

    If one angle in a pair of vertical angles measures 42 degrees and the other measures 2n-4 degrees, which is the value of n? I got 23 degrees but I am not sure if it is correct. Please help me...

    asked on November 12, 2013
  22. physics

    A student sits on a freely rotating stool holding two weights, each of which has a mass of 3.00 kg. When his arms are extended horizontally, the weights are 1.00 m from the axis of rotation and he rotates with an angular speed of 0.750 rad/s. The moment of

    asked on December 5, 2006
  23. physics

    a water balloon launcher with a mass of 4 kg fires a .5 balloon with a velocity of 3m/s to the east. what is the recoil velocity of the launcher?

    asked on March 10, 2014
  24. Chemistry

    What mass of octane must be burned in order to liberate 5510 kJ of heat? ΔHcomb = -5471 kJ/mol.

    asked on March 26, 2011
  25. Science

    An object is placed 37.5 cm in front of a concave mirror with a radius of curvature of 75 cm. Describe the characteristics of the image in using GRESA form

    asked on September 10, 2018
  26. Intro to Computers

    You are setting up a desktop computer for an AutoCad specialist who needs a minimum of 125 GB of RAM. Which operating system below would be best-suited for his needs? A. Windows 8 Home 64-Bit Edition B. Windows XP 32-Bit Professional Edition C. Windows

    asked on January 13, 2014
  27. Physics

    No glass is perfectly transparent. Mainly because of reflections, about 92% of light passes through an average sheet of clear windowpane. The 8% loss is not noticed through a single sheet, but through several sheets it is apparent. How much light is

    asked on November 28, 2012
  28. Statistics

    A retail shop accepts only cash or checks. Suppose that 54% of its customers carry cash, 51% carry checks, and 71% carry cash or checks (or both). What is the probability that a randomly chosen customer at the shop is carrying both cash and checks?

    asked on October 22, 2011
  29. ap statistics

    In a survey, 600 mothers and fathers were asked about the importance of sports for boys and girls. Of the parents interviewed, 70% said the genders are equal and should have equal opportunities to participate in sports. B. Using the normal approximation

    asked on April 24, 2014
  30. 6 Entropy

    Using the thermodynamic data provided below, calculate the standard change in entropy when one mole of sodium nitrate is dissolved in water? S° (J/K•mol) NaNO3(s) 116.3 Na+(aq) 60.25 NO3–(aq) 146.4 Using the value you calculated, how will the

    asked on May 3, 2011
  31. Physics

    A large crate filled with physics laboratory equipment must be moved up an incline onto a truck. 1. The crate is at rest on the incline. What can you say about the force of friction acting on the crate? a. The friction force point up the include b. The

    asked on September 22, 2008
  32. Calculus

    Use normal vectors to determine the intersection, if any, for each of the following groups of three planes. Give a geometric interpretation in each case and the number of solutions for the corresponding linear system of equations. If the planes intersect

    asked on July 9, 2008
  33. World history

    Which of the following did NOT contribute to an increase in food production and population growth during the Middle Ages? A) the invention of the ox collar B) a climate change C) a heavy, wheeled plow with an iron plowshare D) a three-field system of crop

    asked on December 4, 2017
  34. Chemistry

    How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? The density of mercury is 13.55 g/cc. Answer in units of atoms.

    asked on September 16, 2015
  35. English, Written Communication

    Which of the following are examples of coordinate headings? A. 3, b, iii B. A, i, a C. ii, 2, B D. A, B, C My answer was C but i got it wrong, is it A? PLEASE HELP CANT FIND IT IN MY TEXT BOOK

    asked on May 22, 2015
  36. Optimization Calculus

    A three sided fence is to be built next to a straight section of river, which forms the fourth side of a rectangular region. There is 96 ft of fencing available. Find the maximum enclosed area and the dimensions of the corresponding enclosure. I drew a

    asked on May 2, 2015
  37. physics

    The position of an object as a function of time is given by x = At2 – Bt + C, where A = 7.3 m/s2, B = 5.8 m/s, and C = 4.5 m. Find the instantaneous velocity and acceleration as functions of time. (Use the following as necessary: t.) help!!!!!!!!! thank

    asked on August 28, 2012
  38. science

    if 1000 grasshoppers weigh kg how much does one grasshopper weigh?

    asked on July 21, 2010
  39. math

    A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 40 seconds.

    asked on April 16, 2010
  40. math, calculus

    if f(1)=12 and f' is continuous, what is the value of f(4)? integral from 1 to 4 of f'(x)dx = 17 IF the integral of f'(x) dx from 1 to 4 is 17, as you say, then the function f(x), which is the integral with an arbitrary constant, changes by 17 from 1 to 4.

    asked on November 27, 2006
  41. Algebra

    A bakery packages cookies in two sizes of boxes, one with 18 cookies and the other with 24 cookies. A small number of cookies are to be wrapped in cellophane before they are placed in a box. To save money, the bakery will use the same size cellophane

    asked on April 23, 2012
  42. geometry

    How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

    asked on April 15, 2010
  43. Math

    How do you write 2.78 in expanded form

    asked on November 14, 2009
  44. Chemisrty Lab

    dimensions of a concrete pile are 14 inchesx14 inches x 15 feet. (1 meter=3.28 feet) the pile has 4 faces and 2 ends. 1>what is the surface area in square feet, of a single pile? exclude the ends of the pile. 2>What is the total surface area in square

    asked on September 11, 2007
  45. Language Arts

    "Type a paragraph in which you use at least two linking commas, two semicolons, and one colon." Does the paragraph below match the criteria above? My dog, Bruno, is absolutely amazing; he's so many things for a one year old Miniature Pinscher: funny,

    asked on November 16, 2015
  46. algebra

    a swimming pool is 60 ft long and 35 ft wide. a model of the pool is 9 in long. how wide is the model

    asked on November 16, 2015
  47. math

    Janet bought 1/2 cake. She ate 1/4 of the cake she bought. Then she cut the remainder into 2 equal pieces. What fraction of a whole cake was each piece?

    asked on December 1, 2014
  48. Algebra

    what is the inverse of the linear parent function? How would you graph the inverse and what are the values for the inverse???

    asked on December 16, 2013
  49. Calculus - Volume by Integration

    Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the y-axis: y=(x-2)^3-2, x=0, y=25 (a)solve by either the disk or washer method (b)solve by the shell method (c)state which method is easiest to

    asked on November 24, 2013
  50. math

    For her vacation Mrs. Andrews bought $300 worth of traveler's checks in $10 and $20 denominations. If she has 22 travelers checks in all, how many of each denomination does she have? Let x represent the number of $10 traveler's checks she has. Which

    asked on August 20, 2012
  51. bio

    Homozygous dominant for BRCA1-what is the genotype? (using the letter b)

    asked on November 19, 2011
  52. Chem

    State the hazard warning label that should be shown on a jar of oxygen.

    asked on October 5, 2011
  53. Chemistry

    Why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

    asked on April 12, 2011
  54. Chemistry

    If the specific rotation of Compound X is (-) 123.8º, what would be the observed rotation of its enantiomer, Compound Y, assuming the concentration and cell path length is the same? b. If a racemic mixture of Compound X and Compound Y were analyzed, what

    asked on March 31, 2011
  55. Stats

    Exercise 6-8 The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 235 customers on the number of hours cars are parked and the amount they are charged. Number of Hours Frequency Amount Charged 1 18 $3 2 33 7

    asked on September 28, 2010
  56. physics

    1. Measurements show that there is an electric field surrounding the Earth. Its magnitude is about 100 N/C at the Earth's surface and points inward toward the Earth's center. From this information, can you state whether the Earth is negative or positive?

    asked on July 15, 2010
  57. algebra

    a chemist mixes an 11% alchohol solution with an 8% alchohol solutoins. How many milliliters of each solution should he use to make a 600ml solution that is 8% alchohol solution? Why wouldn't we just use 600ml of the 8% solution to begin with? So 0ml of

    asked on September 12, 2006
  58. math

    Two circles of radii 9cm and 13cm have their centres 15cm apart. Find the angle between the radii joining the centres to the points of intersection of the circles. Hence find the overlapping area between the two circles. - (Been struggling with this

    asked on March 10, 2016
  59. Chemistry

    Calculate the number of moles of carbon atoms present in 1.1 g of ethanol (C2H6O). Answer in units of mol.

    asked on September 16, 2015
  60. College Physics

    A rope can withstand a maximum tension force of 500N before breaking. If we use the rope to pull a 24 kg bucket of water from a well, what is the maximum acceleration upward we can use without breaking the rope?

    asked on February 6, 2015
  61. english

    In "Why, You Reckon?" what argument does the other man use to convince the narrator to team up with him? What lesson do you think the narrator learned by the end of the evening? I have part of the answer but I don't now how to put it in ACE format.

    asked on January 23, 2015
  62. Physics

    A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 5.9 m due east. For the second putt, the ball travels 2.4 m at an angle 20° north of east. The third putt is 0.50 m due north. What displacement

    asked on June 26, 2014
  63. physics

    robin is standing terrified at the end of a diving board, which is high above the water. if robin has a mass of 75 kg and is standing .6m from the board's pivot point, what torque is robin exerting on the board

    asked on April 22, 2014
  64. Finance

    The ________ model is usually considered the best of the capital budgeting decision-making models. A) Internal Rate of Return (IRR) B) Discounted Payback Period C) Profitability Index (PI) D) Net Present Value (NPV) Is the correct answer D. (NPV)

    asked on January 23, 2014
  65. American Revolution

    What did the Colonial boycotts of British goods before the Revolutionary War were effective measures. I wanted to say It lowered the prices of imported goods but I had second thoughts and thought It reduced the profits of British merchants.. Please help me

    asked on May 26, 2013
  66. chemistry

    How many osmoles are there in 6.00 ML of a 6.0 N mg3(po4)2 solution?

    asked on December 5, 2012

    An artillery shell is fired with an initial velocity of 300m/s at 55 degrees above horizontal. To clear an avalanche, it explodes on a mountainside 42.0s after firing. What are the x and y coordinates of the shell where it explodes, relative to its firing

    asked on September 6, 2012
  68. geometry

    If all of the diagonals are drawn from a vertex of a quadrilateral, how many triangles are formed?

    asked on April 20, 2012
  69. Physics

    A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.60, what was the speed

    asked on January 5, 2012
  70. Math

    write numeral as hindu- arabic numeral _ XMMDCLXII

    asked on May 14, 2011
  71. chemistrty

    A sample containing 7.20g O2 gas has a volume of 33.0L Pressure and temperature remain constant. What is the volume after 4.00g He is added to the O2 gas already in the container?

    asked on April 8, 2011
  72. Math

    Eve:"Doris and I are twins" Ann: "Doris and Eve are not twins" Doris: "Ann and I are not twins" Who are the twins?

    asked on August 26, 2010
  73. physics

    1. At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire? 2. The leaves of a charged electroscope collapse in time. At

    asked on July 14, 2010
  74. 9th grade

    why did miss muffet need a road map

    asked on October 8, 2008
  75. Psychology

    What is another name for a pretty part of a flower? ( NOT BLOOM) What are the male and female parts of a flower? (LIST THE NAMES) Thank you!

    asked on September 6, 2008
  76. maths

    A Baker uses 2/3 of a bag of flour to make 6 muffins how many bags of flour will he need to make 48 muffins

    asked on January 13, 2020
  77. Ancient History

    Which effect did continued trade with Egypt have on Kush civilization? A. Kushites adopted many elements of Egyptian culture. Correct answer B. Kushites learned to navigate the Nile River. Incorrect answer C. Kushites stopped trading with other African

    asked on November 27, 2019
  78. Science

    What is the molecular structure of methylated spirits

    asked on May 1, 2019
  79. Philosophy

    Explain and critically evaluate Parmenides’ arguments that being is unitary, undifferentiated, and eternal. i am really stuck on this question, could someone help me better understand

    asked on September 27, 2018
  80. math

    how many positive 4-digit numbers are there with an even digit in the hundreds position and an odd digit in the tens position? a. 10,000 b. 5,040 c. 2,500 d. 2,250

    asked on September 3, 2018
  81. Physics

    The horizontal surface on which the block slides is frictionless. The speed of the block before it touch the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been compressed 0.15 m? The spring constant, k = 2000 N/m

    asked on February 26, 2017
  82. Chemistry

    For the reaction 2 NO (g) + Cl2 (g) → 2 NOCl (g) If the concentration of NO is tripled, the rate of the reaction increases by a factor of nine. If the concentration of Cl2 is cut in half, the rate of the reaction is decreased to half the original rate.

    asked on April 17, 2016
  83. Geometry

    The contrapositive of the following conditional statement: If a figure has four sides, then it is not a triangle. A.If a figure does not have four sides, then it is a triangle. B.If a figure is a triangle, then it does not have four sides. C.If a figure is

    asked on December 15, 2015
  84. chemistry

    why does water,oil,acetone and isopropanol have the same concave meniscus shape?

    asked on May 25, 2015
  85. `Statistics

    A public relations firm found only 9% of voters in a certain state are satisfied with their US senators. How large a sample of voters should be drawn so that the sample proportion of voters who are satisfied with their senators is approximately normally

    asked on March 26, 2014
  86. English

    What is the definition for "Vague Optimism"?

    asked on December 17, 2013
  87. Math

    One of two complementary angles has a measure that is five times that of the other. Which equation could be used to find x, the degree measure of the smaller angle? A) 5x=90 B) x+5x=90 C) 5x=180 D) x=5x=180 I chose A but I wasn't sure if I was correct.

    asked on November 12, 2013
  88. History/Economics..PLEASE HELP!!

    Plato, a Greek philosopher who lived from 427BC to 347BC, famously wrote that, "Necessity is the mother of inventions." Do you agree with this statement? Why or why not? My response was, " I agree with this statement because most of the inventions from the

    asked on October 25, 2013
  89. History/Economics

    Plato, a Greek philosopher who lived from 427 BC to 347BC, famously wrote that, "Necessity is the mother of invention." Do you agree with this statement? Why or why not?

    asked on October 24, 2013
  90. math

    chris put $1,500 in a savings account at an annual interest rate of 5%. If chris does not deposit or withdraw any money, what is the amount of interest chris will earn the first year her money is in the savings account? use the formula i=prt

    asked on August 4, 2013
  91. Physics

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

    asked on February 14, 2013
  92. Physics

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

    asked on February 14, 2013
  93. math

    What 3 digit number can be written as 45 tens

    asked on September 27, 2012
  94. chemistry

    the equilibrium system shown below was analyzed and the concentrations of HI(g, and I2(g) were found, in mol/L, to be 4.4, 3.2, 1.5 respectively. the equilibrium constant must be which f the following? H2(g) + I2(g) 2HI(g) + 65KJ

    asked on May 5, 2012
  95. Algrbra I

    Help!! I do not understand how to work these types of problems. My instructor gives us really long formulas and charts for these and i don't get it!! Im good at algebra, I have an A in the class, so this is irritating to me! The radiator in a certain make

    asked on February 8, 2012
  96. math

    why do oyu change the last two signs when subtracting two negative numbers?

    asked on December 17, 2011
  97. english

    A good strong thesis statement about the children's book Corduroy by Don Freeman

    asked on October 20, 2011
  98. social studies

    what is the constitution

    asked on September 16, 2011
  99. trig

    give and exact value for cos(2pi/3)

    asked on March 6, 2011
  100. Reading

    How do i write my cat leaped onto my stomach in the middle of the night correctly?

    asked on February 3, 2011


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