Most 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. 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
  3. chemistry

    an unsaturated solution is made by completely dissolving 20.0 grams of NaNO3 in 100.0 grams of water at 20.0 degrees celcius. show a corrct numerical sat up for calculating the number of moles of nano3(gram-formula mass = 85.0 grams per mole) used to make

    asked on April 23, 2012
  4. 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
  5. 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
  6. 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
  7. 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
  8. Chem

    What is the balanced net ionic equation for copper(2)chloride and potassium carbonate ?

    asked on September 8, 2015
  9. 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
  10. 9th grade

    why did miss muffet need a road map

    asked on October 8, 2008
  11. Math

    If the legs of a right triangle have lengths of 6 inches and 8 inches, what is the length of the hypotenuse in inches? A.11 B.13 C.10 D.16 Is the answer C?

    asked on October 25, 2016
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. math

    What is the loop that forms after many iterations when the initial value of g is 1.7? What is the loop that forms after many iterations when the initial value of g is 1.72?

    asked on February 5, 2017
  19. 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
  20. 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
  21. Geometry

    How do you go about finding the lateral area of a trianglar prism? Ex: The base of a triangular prism is an equilateral triangle with a perimeter of 42 cm. If the height of the prism is 10 cm, find the lateral area. Thanks for the help in advance

    asked on January 15, 2010
  22. 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
  23. Chemistry

    Based on the following equation: 2AgNO3 + CaCl2 > 2AgCl + Ca(NO3) When 50 g AgNO3 are combined with 1.45M CaCl2 solution, what volume of the 1.45M CaCl2 solution would be needed to precipitate all of the silver as AgCl?

    asked on April 25, 2017
  24. 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
  25. 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
  26. English

    Which of the following conflicts in Poor Fish is the most importance -individual vs. self, individual vs. another, individuals. society vs. nature support your answer using example from the story please help this is and essay and I'm confused thank you.

    asked on October 17, 2017
  27. Physics

    The instant before a batter hits a .14 KG baseball, the velocity of the ball is 45 meters per second west. The instant after the batter hits the ball, the ball's velocity is 35 meters per second eat. The bat and ball are in contact for 1.0 x 10 ^-2 second.

    asked on March 9, 2010
  28. 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
  29. Chem II

    The conversion of glucose into lactic acid drives the phosphorylation of 2 moles of ADP to ATP and has a standard free energy of -135 kJ/mol. C6H12O6 + 2 HPO4 + 2 ADP + 2 H+ --> 2CH3CH(OH)COOH + 2 ATP + 2H20 What is the standard free energy for the

    asked on April 7, 2015
  30. chemistry

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

    asked on May 25, 2015
  31. Chemistry

    On average, Earth's crust contains about 8.1% aluminum by mass. If a standard 12-ounce softdrinks can contains approximately 15g of aluminum, how many cans could be made from one ton of the Earth's crust?

    asked on June 27, 2018
  32. chemistry

    A sample of N2O effuses from a container in 45 seconds. How long would it take the same amount of gaseous I2 to effuse from the same container under identical conditions?

    asked on October 16, 2008
  33. Chemistry

    Rank the following in order of increasing vapor pressure at 298 k: CH3CH2OH, CH3OCH3, CH3CH2CH3.

    asked on December 11, 2015
  34. Social Studies

    2. How does India’s form of government contrast with the governments of Pakistan and Afghanistan? India is an Islamic republic; the others are not. Pakistan and Afghanistan have a long history of democratic government. India does not have a constitution.

    asked on March 6, 2014
  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. Chemistry

    Describe the procedure you would follow to determine the concentration of vitamin c in a sample if the volume of dcpip required to reach the end point were more than the 10-mL graduated cylinder could hold. The titration must still be carried out in the

    asked on February 5, 2017
  37. 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
  38. Trig

    Two tracking stations are on the equator 161 miles apart. A weather balloon is located on a bearing of N 32°E from the western station and on a bearing of N 16°E from the eastern station. How far is the balloon from the western station? Round to the

    asked on November 19, 2014
  39. chemistry

    When 1.0 of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 How many megajoules are released when 9.0 of gasoline burns?

    asked on September 10, 2011
  40. Chemistry

    A 100 milliliter sample of 0.100-molar NH4Cl solution was added to 80 milliliters of a 0.200-molar solution of NH3. The value of Kb for ammonia is 1.79 x 10^-5. (a) What is the value of pKb for ammonia? (b) What is the pH of the solution described in the

    asked on April 26, 2010
  41. Math

    Dave takes out a 23-year mortgage of 200000 dollars for his new house. Dave gets an interest rate of 13.2 percent compounded monthly. He agrees to make equal monthly payments, the first coming in one month. After making the 65th payment, Dave wants to buy

    asked on September 12, 2017
  42. 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
  43. Chemistry

    How many potassium ions are present in the following: 1) 3 moles of potassium chloride.

    asked on August 28, 2016
  44. Chemistry

    How many grams of acetic anhydride are needed to react with 3.82g of salicylic acid?

    asked on April 23, 2014
  45. Introduction to Computers

    The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operating system? A. Dos B. Windows 95 C. Windows 98 D. Windows NT

    asked on January 9, 2014
  46. Science

    3. What can scientists learn from the rate at which radioactive elements decay? (1 point)

    asked on November 6, 2013
  47. Science

    3. What can scientists learn from the rate at which radioactive elements decay? (1 point)

    asked on November 6, 2013
  48. AP Chemistry

    which of the following is the most polar? 1. I3- 2. XeF2 3. SCN- 4. O3 5. N2O i know it's not I3- or SCN-. which one would it be.

    asked on August 8, 2010
  49. 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
  50. Math

    A person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function s(t) = -16t^2 +64t + 160 models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how

    asked on October 18, 2011
  51. Chemistry

    If 8.00 g of ammonuim nitrate is dissolved in 1000 ml of water for use as a plant fertilizer, the water decreases in temperature form 21.00C to 20.39 C. Determine the molar heat of solution of ammonium nitrate

    asked on May 11, 2010
  52. 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
  53. PHYSics

    a child with a mass of 29 kg sits at a distance of 4m from the pivot point of a seesaw. where should a 15 kg child sit to balance the seesaw?

    asked on April 22, 2014
  54. physics

    A boy reaches out of a window and tosses a ball straight up with a speed of 15 m/s. The ball is 20 m above the ground as he releases it. Use energy to find the following.

    asked on December 1, 2009
  55. Calculus rate of change

    A machine starts dumping sand at the rate of 20 m3/min, forming a pile in the shape of a cone. The height of the pile is always twice the length of the base diameter. After 5 minutes, how fast is the base area of the base increasing? I honestly have no

    asked on July 18, 2016
  56. Geargia State History (Social Studies)

    2. Officials whose jobs are not provided for in the constitution but are required by law are known as __________. A. Constitutional Officers B Secretaries Of State C. Deputies D. Statutory Officials 5. True False: The state supreme court is an appellate

    asked on January 31, 2017
  57. Careers

    1. Small family farms are part of the agribusiness pathway. .True .False

    asked on October 15, 2018
  58. 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
  59. chem

    What would be the reaction between Mn2+ and NH3? is it Mn(NH3)? and would this solution react with HNO3, considering it would already have NO3 in it?

    asked on November 1, 2010
  60. biochemistry

    Calculate the free energy of hydrolysis of ATP in a rat liver cell in which the ATP, ADP, AND Pi concentrations are 3.4, 1.3, and 4.8 nM, repectively. (ATP hydrolysis has delta G note= -30 kJ/mol)

    asked on October 5, 2010
  61. 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
  62. 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
  63. 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
  64. chemistry

    I fyou had only 12g of KOH remaining in a bottle, how many ml of 12.8%(w/v) solution could you prepare? (in mL) How many ml of 0.29 M solution could you prepare using 12 g of KOH?

    asked on November 21, 2010
  65. Chemistry

    Listerine mouthwash has 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash ?! ( the density of ethanol is 0.789 g/mL.) how would yu do this problem ?!?!

    asked on July 24, 2010
  66. Physics

    A cannonball is fired with initial speed v0 at an angle 30° above the horizontal from a height of 42.9 m above the ground. The projectile strikes the ground with a speed of 1.2v0. Find v0.

    asked on January 31, 2016
  67. Algebra

    The mean is 18.1 The z-score for 13.0 is - 1.7. What is the standard deviation for this data set.

    asked on May 19, 2014

    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
  69. 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
  70. Math

    How do you write 2.78 in expanded form

    asked on November 14, 2009
  71. 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
  72. math

    Jeffrey's dogs ate 42 pounds of food during July. At that rate, how many days would a 100 pound bag of dog food would last? Round to the nearest whole day.

    asked on August 4, 2013
  73. math

    Mr.Lewis drew a triangle measurement, x, .5x, and 1.5x. What is the best classification for this triangle? a. acute, scalene b. obtuse, scalene c. right, equilateral d. equiangular, equilateral e. obtuse. isosceles (i don't understand how to solve this

    asked on December 27, 2012
  74. Physics

    The centers of a 14 kg lead ball and a 120 g lead ball are separated by 9.0cm .What gravitational force does each exert on the other?

    asked on March 22, 2010
  75. social studies

    when listing a location of a place the degree of longitude is always listed???

    asked on September 7, 2009
  76. Geometry

    Water was leaking from a faucet at a rate of 1.5 gal every 5 min. If it took 18 min to stop the leak, how much water was wasted?

    asked on August 19, 2008
  77. Chemistry

    At its normal boiling point of 126°C n-octane, C8H18, has a vapor pressure of 760 torr. What is its vapor pressure at 25°C? the enthalpy of vaporization of n-octane is 39.07 kj/mol.

    asked on December 11, 2015
  78. Chemistry

    3490 J of heat are added to a 20.4 g sample of iron at 20◦C. What is the final temperature of the iron? The specific heat of iron is 0.449 J/g · K. Answer in units of K.

    asked on October 24, 2015
  79. math

    Cher has forgotten the combination to her locker. She knows it consists of four numbers -- 3, 5, 7, and 9 -- but she can't recall the order. She decides to try every possible order until she gets the right one. How many possible orders are there?

    asked on January 13, 2011
  80. 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
  81. physics

    turners treadmill runs with a velocity of 120 cm/s and speeds up at regular intervals during a half hour workout. After 25 seconds, the treadmill has velocity of 6.5 m/s. what is the avg acceleration of the treadmill during this period ?

    asked on September 21, 2014
  82. social studies

    this tiny country located on 90 degres east meridian is squeezed between china and india

    asked on September 7, 2009
  83. math

    Mrs. Jones is thinking of a number that when rounded to the nearest hundred is 400. what is the number? explain

    asked on September 16, 2013
  84. Chemistry

    A reaction of magnesium with nickel (iii) chloride will produce magnesium chloride and nickel. Using 31.76g of magnesium would produce how many grams of nickel?

    asked on October 21, 2012
  85. English PLZ HELP

    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, im torn between A and B? PLEASE HELP CANT FIND IT IN MY TEXT BOOK

    asked on May 22, 2015
  86. Math

    Two railroad tracks cross each other. If the measure of angle 1 is 3 times the measure of angle 2. What are the measures of angles 1,2,3, and 4? Explain and show your work please.

    asked on November 12, 2013
  87. Calc

    A particle moves along the x-axis in such a way that it's position in time t for t is greator or equal to 0 is given by x= 1/3t^3 - 3t^2 +8 A) show that at time t= 0 the particle is moving to the right. B) find all values of t for which the particle is

    asked on January 25, 2013
  88. Physics

    On a frozen pond, a person kicks a 10.0 kg sled, giving it an initial speed of 12.2 m/s. How far does the sled move if the coefficient of kinetic friction between the sled and the ice is .10?

    asked on December 11, 2009
  89. physics

    a bus travels 280 km south along a straight path with an avg velocity of 88 km/h to the south. then it travels 210 km south with an avg velocity of 75 km/h to the south. a) how long does the 1st trip last? b) how long does the 2nd trip last? c) what is the

    asked on September 21, 2014
  90. physics

    a 50 kg student who is late runs up two flights of stairs whose combined vertical height is 7.0 m in 10 s (and he then silently enters the classroom while the professor is writing on the chalkboard).Calculate the student's power output in doing work

    asked on February 5, 2013
  91. Physics

    A transverse wave is formed on a long skipping rope. The equation of the transverse wave is y=5.50 sin(0.031π x+5.52π t) where x and y are in centimeters, t is in seconds, and Π is pi (3.14..). Find the amplitude of the wave? what is the wavelength of

    asked on March 19, 2017
  92. Chemistry

    Iron ore consists mainly of iron III oxide. When iron III oxide is heated with an excess of coke(carbon), iron metal and carbon monoxide are produced. Assume that even if an excess of coke is not present that the reaction proceeds as described. A)write a

    asked on October 15, 2006
  93. Chemistry

    Express the absolute value of the partial charges as a decimal fraction of the elementary charge for OH.

    asked on February 14, 2017
  94. Chemistry

    if a photon of light has an energy of 2.35x10^-19 J, calculate the frequency and wave length. What solution do I use to get the answer?

    asked on October 21, 2015
  95. Chemistry

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

    asked on May 4, 2013
  96. chemistry

    6.0mol of ammonia gas is injected into a 3.0 mol L container. at equilibrium 1.5 mol of hydrogen gas is found in the container. the number of moles of ammonia gas left in the container must be which of the following?

    asked on May 5, 2012
  97. grammar

    4.The patient is a 42-year-old male with a history of left shoulder osteomyelitis with resistant pseudomonas from an injury he sustained approximately 20 years ago. pls help me with all the prepositions & conjuctions in the above sentence.

    asked on June 15, 2011
  98. Physics

    A man doing push-ups pauses in the position shown in the figure . His mass = 68 kg. Determine the normal force exerted by the floor on each hand. Determine the normal force exerted by the floor on each foot.

    asked on November 7, 2010
  99. Chemistry

    A 0.2512 stock sample of HCl is tirade to equivalence . If 16.77ml of 0.1410 M NaOH is required to reach the equivalence point, what volume of stock HCl was used for the tritation?

    asked on September 15, 2016
  100. math

    Ruth's brother just went away to college this fall and had to buy his own laundry soap and fabric softener.The laundry soap was twice the cost of the fabric softener. the total of the two items was $7.47. how much did the laundry soap and the fabric

    asked on March 29, 2015


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