Questions Asked on
April 6, 2011

  1. physics

    You have an inclined plane. It is 2m long and 1m high. A cylinder of mass 300 grams and 3cm radius is initially at rest at the top of the hill. What is its angular velocity when it reaches the bottom of the hill?

    asked by Lakeshia
  2. MicroEconomic

    Strictly speaking, perfect competition has never existed and probably never will. Then why study it?

    asked by JT
  3. Calculus (urgent!!)

    Please answer the following questions about the function f(x)=e^(-0.5x^2) Instructions: If you are asked to find x- or y-values, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if

    asked by Catherine
  4. chemistry

    In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?

    asked by Tina
  5. chemistry

    In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?

    asked by Tina
  6. business communication

    Today many employers expect interviewees to do more than just answer standard questions including all of the following except .defer to the hiring company to take control of the interview process B.provide samples of work they woukd likey do in the job.

    asked by se
  7. home economics

    Why do some workers make more money than others

    asked by Anonymous
  8. science

    A 250 kg object is acceelerating at 2.8 m/s2. What force was required to achieve this?

    asked by Kelsey
  9. chemistry

    In the reaction N2 + 3H2 -> 2NH3, how many grams of NH3 gas would be formed when H2 gas, having a volume of 11.2 liters at STP, reacts with excess N2 gas? Completly confused, thank you very much for your help :)

    asked by David
  10. Chemistry

    A 2.52 mg sample of the compound didemnin – C was analyzed and found to have the following compositions: 1.55 mg C, 0.204 mg H, 0.209 mg N, and 0.557 mg O. The mass spectrum of didemnin – C was found to have a parent mass peak of 1014 g/mol

    asked by Anonymous
  11. Chemistry

    In a decomposition reaction 2KCLO3 -> 2KCL + 3O2, what volume of O2 gas at STP would be produced from 3.66g of KCLO3 Thank You very much for your help :)

    asked by David
  12. Chemistry

    HELP!!! An unknown metal having a mass of 14.00g is dropped into 11.00mL of water at 20.0 degrees Celcius. The starting temperature of the chunk of metal is 100.0C. The final temperature of the water and metal is 32.5C. What is the specific heat of the

    asked by Marie
  13. Information Technology Principles

    If a term paper consisted 42 pages, each containing 40 lines of 100 symbols each (counting each space as a symbol), was to be encoded using Unicode, how many bytes of storage space would be required?

    asked by saqer
  14. European History

    Hi I just wanted to know if there is any evidence that Stalin used the fear/hatred of Kulaks to eradicate other political and social opponants... Thanks ps. If you could include any sources to support this it would REALLY help

    asked by Hilary
  15. Maths

    Find the particular solution of the differential equation from: dy/dx = 2/27(x-3)ã(x^2-6x+23) / (y) (y>0. For which y=2 when x =1, and then give this particular solution in explicit form. regards Claire

    asked by Claire
  16. Chemistry

    Calculate the mass of H2O produced by the decomposition of 2.21g of CuCO3 x Cu (OH)2. What happend to this water? This question is incredibly important and I am stuck on it, thank you very much for your help

    asked by Vanessa
  17. Math

    Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?

    asked by Lily
  18. chem

    determine the wavelength of the line in the emission spectrum produced by an electron transition He+ from ni= 4 to nf= 2.

    asked by james
  19. Math 8th Grade

    Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?

    asked by Lily
  20. Physics

    A concave mirror has a focal length of 20 cm. What is the magnification of an object placed 128 cm in front of this mirror?

    asked by Deli
  21. Physics 2

    A converging lens with a focal length of 19 cm is used to form an image on a screen that is 3.3 m to the right the lens. Where must the object be placed? ____m to the left of the lens?

    asked by Deli
  22. calculus

    A rumor spreads through a population in such a way that "t" hours after the rumor starts, the percent of people involved in passing it on is given by P(t)=100[e^(-t)-e^(-4t)]. What is the highest percent of people involved in spreading the rumor within the

    asked by Anonymous
  23. Algebra investment

    An investor had a total of 25,000 put into a portfolio of stocks, bonds, and mutual funds. In one year, he earned 8% on the stock investment, 10% on the bond investment and 6% on the mutual funds investment. The annual(simple interest) return was $1860. if

    asked by Maka
  24. Statistics

    How do you calculate pearson's r from this table? X Y 5 24 8 40 3 20 6 30 9 40 7 35 10 50 2 22 The correct answer for the linear regression table is Y' = 3.56X + 10.4. But every time i calculate r, i get a value over 1. Here is another one that i couldn't

    asked by BlahxD
  25. calculus

    If H(x)=-(25-x^2)^(1/2); then what is the value of lim x tends to 1 (H(x)-H(I))/(x-1) ?

    asked by Rimi
  26. Chemistry

    Calculate amount of solid NaF required to prepare a 250mL acidic buffer with pH=2.75. The initial molarity of HF is .25M but you only have .075L of it. I have tried many different ways... the most recent and seems to be simplest was using H-H equaion and

    asked by John
  27. Chemistry

    Calculate the pH of the buffere prepared if 40.0 mL of .2M NaOH is added. The previous buffer is made from HF an NaF... assume all necessary information is known about this buffer. Print an equation that shows how the NaOH is consumed by the buffereing

    asked by John
  28. English

    Can you please tell me why "The hotel lies at a short distance from the beach" is wrong? Here are some more words I'd like you to check with reference to fashion. 1) wedge-heeled shoes, Parà-rubber shoes, trousers with patches on both sides, jeans with

    asked by Mike
  29. science -Do you think DNA from another organism wo

    Do you think DNA from another organism would have a different appearance? i m assuming yes.. is it??

    asked by kim
  30. calculus

    the net monthly profit in dollars, from the sale of a certain item is given by formula p(x)=10^6[1+(x-1)e^-0.001x], where x is a number of item sold

    asked by Anonymous
  31. statistics

    A confidence interval or significance test is called stable if the confidence level or P-value does not change very much when the conditions for use of the procedure are violated

    asked by A confidence interval or significance test is call
  32. Organic Chemistry

    The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2 C10H18O2 + CH3CH2OH + H3O+ → C10H22O2

    asked by chem
  33. Organic Chemistry

    Suggest structures for C10H14O; C10H16; C10H18; C10H16O3; C10H16O2 ; C12H22O2 in the following reaction schema: The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2

    asked by chem
  34. geometry

    Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,-1), D(-3,-1) and E (-3,2)

    asked by PAT
  35. geometry

    Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,-1), D(-3,-1) and E (-3,2)

    asked by PAT
  36. music

    which one of the following pieces of music would you most expect to be played by a full orchestra

    asked by ellie
  37. fizik

    A 2kg ball,A moves to the right with velocity 4 m/s collides with another 1kg ball,B moving in the opposite way with velocity 0.5m/s. after the collision, both ball move at 30 degree and 15 degree from horizontal. calculate the final velocity of each ball

    asked by alya
  38. physics

    A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate

    asked by Physics,help.
  39. physics

    A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate (1)the kinetic energy of the tennis ball when hits the ground. (2)the height reached on the ground

    asked by Physics,help.
  40. English - Native speakers

    Helo :) Can you tell me if the following explanation of mine concerning possessive s is correct? We put 's with every noun in singular (my mother's house)and when we have irregular plurals (this is my children's school) We put just the apostrophe when we

    asked by Mark
  41. physical

    Part A Each blade on a wind turbine is engineered to produce an effective force through its center of mass that is perpendicular to its long axis. (Part A figure) The magnitude of the force produced by each blade in a wind of speed v is F=(40.0~{\rm

    asked by gary
  42. math

    assume that the edge of a square is 1 unit add squares to this shape so that it has a perimeter of 18

    asked by pat
  43. pscyhology

    Which one of the following statements best illustrates implicit memory

    asked by jabrenne carter
  44. math

    t=sin(2*t^3) get the t

    asked by kevin
  45. Physics 203

    A 1.3-kg 10-cm-diameter solid sphere is rotating about its diameter at 77 rev/min. (a) What is its kinetic energy? (b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball? rev/min

    asked by Kayla
  46. Environmental Science

    write down the '' balance sheet''(carbon,electron,ATP,etc)for the fallowing metabolic process: -use the most common alternatives. -Give the balanced overall reactions with correct stoichiometry -Ýndicate all key reactans and products. -calculate how many

    asked by Djef
  47. GCF Help?

    w^2-15w+44=0 How would I solve this? I know you need to find the GCF of it, but I can't figure it out.. Could someone help me? Thanks

    asked by Allyson
  48. geometry

    A pentagon is a geometric figure with 5 sides. The lengths of the sides of a given pentagon are (6x + 2) cm, (3x + 2) cm, (2x) cm,(3x + 4) cm, and (8x – 4) cm. Which equation below describes the perimeter, P, of the pentagon in terms of x?

    asked by Anonymous
  49. vocabulary

    select the antonym of the word philanthropy. a)charity b)greedy c)benevolence d)generosity ........please help me .

    asked by amy
  50. biology

    what are examples of enzymatic disorders? How do the diseases involve enzymatic reactions?

    asked by vivian
  51. math

    1) A region is bounded by the line y = x and the parabola y = x2 - 6x + 10. What is the volume of the solid generated by revolving the region about the x-axis?

    asked by arun
  52. math

    2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.

    asked by arun
  53. geometry

    A wheel with a diameter of 18 m takes one full rotation.How much distance has it travelled?

    asked by reahna
  54. math

    Write the following expression as the sine, cosine, or tangent of an angle: cos45°cos120° - sin45°sin120°

    asked by arun
  55. earth

    If the ray is traveling 5800 miles per hour from earth how long would it take to hit the moon?

    asked by Anonymous
  56. math

    Two similar polygons have areas of 16 square inches and 64 square inches. The ratio of a pair of corresponding sides is 1/4. True False its true?

    asked by danny
  57. physics

    Quartz has a refractive index of 1.54. If light from a HeNe laser impinges on an air/quartz interface at an angle of 22.5 degrees, what is the angle of refraction?

    asked by noel
  58. Algebra II-Please check calc

    How many ways can a teacher arrange 10 students in a front row if there are 60 students I think I do 60!/50! = 2.74 *10^17 How many ways can you choose committee of 7 from a total of 20 (20 nCr7) = 77520

    asked by Katie L.
  59. Physics 203

    A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg. (a) Find the speed of the 2 kg block after

    asked by Kayla
  60. Finite Math

    Consider the pea data: # peas in pod 2,3,4,5,6 and frequency 7, 9, 5, 3, 1: a. find the mean, median, mode and midrange number of peas per pod. b. is the mean higher or lower than the median? What kind of skew does this indicate?

    asked by ophelia
  61. Finite Math

    The weekly take-home pay (in dollars) for 20 graduate teaching assistants at University Z is as follows: 500.75, 217.43,488.25, 405.78 485.46, 495.48, 370.75, 435.40 479.65, 482.56, 470.28, 489.90 382.50, 500.75, 465.32, 481.25 506.43, 225.50, 504.38,

    asked by caylin
  62. Excel

    Want to create a worksheet that will help track your grades and. What formulas and/or functions might you use?

    asked by Haley
  63. French

    Qu’est-ce que la culture? Donnez deux exemples de la « culture française » qui illustrent votre définition de la culture. Utilisez au moins 3 phrases au subjonctif.

    asked by TITI
  64. math

    1) A region is bounded by the line y = x and the parabola y = x2 - 6x + 10. What is the volume of the solid generated by revolving the region about the x-axis?

    asked by arun
  65. biology

    Hi, I appreciate your expert help,and I have a question for you. If I'm asked to decribe resting potential, action poential, and synaptic transmission,in point form;would the following responses be right? Resting Potential: 1.Membrane at resting potential-

    asked by Cliff
  66. calculas

    2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.

    asked by arun
  67. Chemistry

    Sulfur burns in oxygen in two steps: i.S(s) + O2(g) ->SO2(g) change of Heat=-297kJ ii. 2SO2(g) + O2(g)->2SO3(g) change of heat=-198kJ Calculate the total heat released if this is the final reaction: 2S(s) + 3O2(g)->2SO3(g)

    asked by Erika
  68. improving your writing

    Please let me know what you think. It's for an exam. Thank you For the past three months, work-related problems have occurred in the office and need to be addressed. Before Jessica Hilo’s medical leave, the workload was equally divided. There were no

    asked by jacqui
  69. English

    what is art online? ( online art galeries, virtual art, nowadays art or something different?)

    asked by Peter
  70. Spanish 7th grade-Please check

    Please check. How would I say "I feel like drawing. Would it be: Yo tengo ganas de dibujar.

    asked by Sally
  71. role of and health care/nursing role

    in health care what trends do you anticipate influencing curriculum content and structure in the next decade?

    asked by Elaine
  72. sociology

    You are a sociologist who uses the conflict perspective to study various aspects of our society. How do you think you would interpret the practice of prostitution? Contrast this view with the functionalist perspective. Do you think your comments would

    asked by Sharon
  73. Physics 203

    A wheel has a thin 2.7 kg rim and four spokes each of mass 1.3 kg. Find the kinetic energy of the wheel when it rolls at 6.0 m/s on a horizontal surface.

    asked by Kayla
  74. Physics 203

    A hollow, thin-walled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and

    asked by Kayla
  75. physics

    A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction,

    asked by Mesho
  76. algebra

    What is a reasonable domain and range for this scenario? Water is added to a 30 milliliter solution that is 50% acid. The equation A(X)=15/30+x respresents the concentration of acid,A, in the mixture as x amount of water is added

    asked by jjj
  77. physics

    A projectile of mass 0.874 kg is shot straight up with an initial speed of 29.0 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 7.70 m, determine the magnitude of the average force due

    asked by Mesho
  78. business

    a merchandising company wants to include the cost of operating its warenhouse in the cost of inventory, what impact will this descision have on the firm's income stement and balance sheet?:

    asked by sassssy
  79. AP Chemistry

    Three gases, xenon, helium, and hydrogen are confined in a 10.0 L vessel at a pressure of 7.0 atm. Intially the vessel contains 3.0 moles of xenon, 2.0 moles of helium, and 2.0 moles of hydrogen. What would the partial pressure of helium be if 5.0 moles of

    asked by Paxton
  80. Math

    25 pea pods were broken apart and the number of peas in each pod recorded. the record looked as foolows: # of peas: 2,3,4,5,6 and frequency; 7,9,5,3,1 a. does this data appear to be skewed? b. What is the model class for theis survey?

    asked by doris
  81. science

    if we mix 2 substance A and B of 30 degrees celsius and 70 degrees celsius respectively.what will be the temp of the mixture

    asked by Nagham
  82. linear programming app

    solve this linear programming problem; A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours of assembly time is available. The profit is $150 on a chain saw and $220 on a chipper. How many of each should be assembled

    asked by ash
  83. math

    Some households were questioned about the numebr of can openers they possessed. The results are indicated in the frequency table shown below: # of openers; 0,1,2,3,4 and frequency;1,8,11,7,1 a. does this dtat appear to be skewed? explain b. How many

    asked by rita
  84. Chemistry

    Assuming that temperature remains constant, calculate the final volume Pressure of a sample of 45 L of gas is increased and the gas goes from 100 kPa to 125 kPa;

    asked by Jill
  85. business

    a merchandising company wants to include the cost of operating its warenhouse in the cost of inventory, what impact will this descision have on the firm's income stement and balance sheet?:do you think the controller is justified in his action. Why?

    asked by sassssy
  86. sociology

    Does race effect the self esteem of children?

    asked by ami
  87. sociology

    Why lighter skins people thought that they are superior to all others.?

    asked by ami
  88. english

    what does limerick and ballad mean ?

    asked by cerys
  89. HCA/240

    Hello, I hope you can help me. I have been trying to research on this Cytotoxic/Cytolytic? I finally found a definition but I am looking for an example of this? Do you have nay ideas that can help me? Thanks,

    asked by Nikol
  90. Chemistry

    How many joules of heat are needed to heat 25.0 g of ice at -5.0 degrees celcius to a final temperature of 40.0 degrees celcius? The specific heat of ice is 2.1 j. Our teacher mention to consider the state of water present at 40.0 degrees celcius which is

    asked by Thao
  91. physics

    A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be one-fourth as tall as the object. i know that 1/f=1/do=1/di. when i put the numbers into the equation i keep getting 23.75 and its saying that its

    asked by julie
  92. Physics

    A hollow, thin-walled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and

    asked by Kayla
  93. home economics

    what are 3 benifits of food imports into ireland?

    asked by jennifer
  94. english

    What type of poem is this : Mary Muddles likes splashing in puddles

    asked by cerys
  95. algebra

    The question is: find f(x+h) for each and the function given is f(x)=x^3+x after you turn it into f(x+h)=(x+h)^3+(x+h) how do you multiply out the cube?

    asked by Sarah
  96. chemistry

    Consider the reaction: A + B −> C If it is 2nd order in A and 0 order in B, a plot of [B]−1 vs time will be... a. linear and negative b. exponential and negative c. linear and positive d. equal to zero e. exponential and positive

    asked by Eddy
  97. AP Calculus

    integrate |sint(t^2)| dt with 0

    asked by Sandy
  98. improving your writing

    This was always my worst subject. Can you please check the changes I made? Thank you very much for your time. For the past three months, work-related problems have occurred in the office and need to be addressed. Before Jessica Hilo’s medical leave, the

    asked by jacqui
  99. Chemistry

    I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And

    asked by Jess
  100. Chemistry

    I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And

    asked by Jess
  101. Chemistry

    I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And

    asked by Jess
  102. math

    Chris is making a scale drawing of his rectangular room. His room measures 12 feet, 4 inches by 11 feet, 6 inches. He wants his drawing to be one-tenth the size of his room. What are the dimensions of his drawing?

    asked by nicole
  103. Math

    If you have this set of numbers: 12, 8, 32, 64, 0, 12, 0, 64, 8, 32, & 24, what is the range? 56 or 64?

    asked by Heather
  104. Math

    Estimate the measure of volume is 282 cubic inches. The actual volume is 289 cubic inches.what is the relative error of the measurements to the nearest thousandth

    asked by Anonymous
  105. algebra

    (y - 6)2 = 13

    asked by Anonymous
  106. physics

    1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?

    asked by arun
  107. physics

    1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?

    asked by arun
  108. physics

    2) Two objects, A and B, initially at rest, are "exploded" apart by the release of a coiled spring that was compressed between them. As they move apart, the velocity of object A is 5 m/s and the velocity of object B is -2 m/s. What is the ratio of the mass

    asked by arun
  109. History

    Is italy a country?

    asked by belle
  110. calculus

    find the derivatives F(x)=8ln(x^5-2x)

    asked by melissa
  111. calculus

    f(x)= x^3/(2x-5)^4

    asked by melissa
  112. Spanish -Please check

    If I ask Manuel if he is in a hurry I could say: Manuel, ¿Tienes prisa?

    asked by Sally
  113. biology

    Explain how alignment of chromosomes on the meta phase plate differs in mitosis, meiosis I, and meiosis II. Why are these arrangements important? Can you tell me where zi can find this information? I don't see it in my text. Thank you

    asked by sarah
  114. Science

    Which is true please help? A) When international comparative data is normalised it is related to the size of the population of the respective countries. B) The Trendalyzer visualisation in Gapminder World would be unsuitable for visualising how the number

    asked by Subash
  115. Economics & Business

    what are the 3 advantages and 3 diasadvantages of having large companies for consumers and other businesses in te same industry.

    asked by Anique
  116. Algebra 2

    Find the inverse of: f(x)=(-1/2)x+3 form of answer..y= Thank you so much!

    asked by Charlotte
  117. polygons

    can you help me unscramble this word loav

    asked by caitlin
  118. Science

    A car travelling at 40mph, and it speeds up to 65mph in 0.2hrs, how far does it travel?

    asked by Christia
  119. Science

    Blood from all parts of the body, exept the lungs goes to what part of the heart

    asked by Bob
  120. polygons

    aerlintg

    asked by caitlin
  121. computer science

    in mobile phone network how many times as strong would a signal be expected to be at 200 m from a base station, compare with at 600 m? is it 81 or 9 or 3 or 0.3 or 0.1 or 0.01

    asked by Jo
  122. chemistry

    Calculate the molarity of a solution by dissolving 40.0 g NaOH in 1.5 L solution.

    asked by Marilyn
  123. chemistry

    Calculate the molarity of a solution prepared by dissolving 25.0 g NaCl in 1.0 L solution.

    asked by Marilyn
  124. chemistry

    A student needs to make a dilution from a stock solution. The stock solution is 2.) M NaCl. How much should the student use of the 2.0 M NaCl to make 1.0 L of 0.05M NaCl diluted stock.

    asked by Marilyn
  125. Salisbury University

    A spring with 53 hangs vertically next to a ruler. The end of the spring is next to the 21- mark on the ruler. If a 3.0- mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?

    asked by Cara
  126. chemistry

    How would you make a 1.0 L of 0.10M NaOH solution of 10.0M NaOH?

    asked by Marilyn
  127. algebra 2

    what is 7^1/2 divided by 7^3/5

    asked by john
  128. MATLAB

    Find the value of x (to 2 decimal places) when y is a minimum, using a while loop. Format the answer, e.g., "At x=ii.ii, y=jj.jj is a minimum". Plot the function. y = x^2 - 4x + 2

    asked by Matt
  129. statistics

    You are a travel agent and wish to estimate, with 98% confidence, the proportion of vacationers who use an online service or the Internet to make travel reservations. Your estimate must be accurate within 4% of the population proportion. a) No preliminary

    asked by alex
  130. statistics

    Question 1 A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of 15 students

    asked by need help
  131. algebra 2

    what is 7^1/2 divided by 7^3/5

    asked by john
  132. math

    what is the simpliest form of 11by7

    asked by gesu
  133. Physics

    If a gas tap is turned on for a few seconds, someone a couple of meters away will hear the gas escaping long before he or she smells it. What does this indicate about the speed of sound and the motion of molecules in the sound-carrying medium?

    asked by Nikki
  134. english

    Good evening, I’m asking some help to improve my english. I’m preparing my first certificate in english of cambridge. I wrote a text with the first sentence given. I’d be so glad if someone help me. Thank you As soon as Roy opened the door, he knew

    asked by Thumbelina
  135. PHysics

    The tip of a helicoptor rotor blade can reach speeds of roughly 300 mph (130 m/s). It takes about 30 seconds to get them up to speed and they have a typical radius of 20 feet (6 m). What is the average angular acceleration of the rotor blades as they get

    asked by Paige
  136. spelling

    what are ways to sort the words scene, muscle, cereal, and recital?

    asked by nicole
  137. Algebra II

    ((x-1)/3x+15))-((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???

    asked by Z
  138. chemistry

    If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

    asked by Ashley
  139. probability

    Suppose 1 person is picked at random from this group of dog owners. The probability that the person chosen is at least 50 years old and has at least 1 dog equals

    asked by shakara
  140. I.T

    pseudocode for a program that is required to compute the costs of a car trip. The required input values are: Litres per 100km, Distance travelled and Cost per litre of petrol. The out value is the total cost of the trip.

    asked by sipho
  141. science

    A giraffe walking at 3m per second accelerates at 2m per second squared to 15 seconds. What speed does it end up at?

    asked by Christia
  142. chemistry

    how do you make 1.00g of NaC2H3O2 using: 0.400 M Na2Co3 0.300 M Pb(C2H3O2)2 NaOH solution with unknown molarity 0.500 M HC2H3O2 You don't have to use all of them

    asked by stephanie
  143. Algebra II

    ((x-1)/3x+15))-((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???

    asked by Z
  144. Physics

    A novice skier, starting from rest, slides down a frictionless 24.0 incline whose vertical height is 215. How fast is she going when she reaches the bottom?

    asked by Cara
  145. Speech Class

    True or False, Communication can involve language but not speech.

    asked by Jake
  146. physics

    calculate the net charge on a substance consisting of a combination of 2.6e13 protons and 6.0e13 electrons. answer in units of C.

    asked by Anonymous
  147. physics

    A 53 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 13 m, and falls a total of 35 m. Calculate the spring stiffness constant k of the bungee cord, assuming Hooke's law applies.

    asked by Cara
  148. chemistry

    An experiment is considered a controlled experiment if it contains tests with chemicals.

    asked by Ashley Jones
  149. Math

    a room is 18 ft long, 14 ft wide, and 8 ft high, then how would i find the cost of carpeting the floor with carpet costing $5/ft2

    asked by Morgan
  150. physics

    A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 13 m the floor is frictionless, and for the next 13 m the coefficient of friction is 0.35. What is the final speed of the crate?

    asked by Cara
  151. English

    Can you please check the following sentences, please. It's really urgent. 1) Following what Joyce had already done in England and Proust in France, and what, in some way, Sterne had attempted as early as two centuries before, Virginia Woolf therefore

    asked by Mike
  152. Math

    a room is 18 ft long, 14 ft wide, and 8 ft high then what is the cost of covering the ceiling with acoustic tile costing $7.50/ft squared

    asked by Morgan
  153. 4th grade math

    how many thousands are in one million?how many millions are in one billion?

    asked by megajolt
  154. physics

    A 280-g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this

    asked by Cara
  155. physics

    A 280-g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this

    asked by Cara
  156. math

    Given the following set, select the statement below that is true. V = {a, e, i, o, u} (Points : 2) v ∈ V a ∈ V y ∈ V o ∉ V V Ø

    asked by nette
  157. Calc. Checking Answer

    Find the antiderivative by hand in each case. S stands for the integral sign I want to make sure I am doing these correctly. A) S x*sqrt(10 + x^2) dx So, u= 10 + x^2 du= 2xdx du/2= xdx (1/2) S sqrt(u) du (1/2)*((u^(3/2))/(3/2)) (1/2)*(2/3)*(u^(3/2))

    asked by Chelsea
  158. math

    a factory produces 6 motorcycles in 9 hours write a proportion and solve it to find how many hours it takes to produce 16 motorcycles. help me please!

    asked by veronica
  159. Math

    a room is 18 ft long, 14 ft wide, and 8 ft high then how would you find the total cost of renovating the walls, floor, and ceiling!

    asked by Morgan
  160. English

    Select the answer that contains the correct punctuation for the following sentence. A diamond is the hardest natural substance it can scratch any other stone. A. The sentence is correct. B. ... substance, it can... C. ... substance; it can... D. ...

    asked by anthony
  161. 4th grade math

    explain how you rounded 6.987 to the nearest tenth.

    asked by megajolt
  162. Calculus

    Write the logarithm of a single quantity: 2ln(x)+ln(4)-(1/2)ln(9)

    asked by Zoe
  163. computer science

    what are the advantages and disadvantages for having multiple versions for one site?

    asked by nee nee
  164. Chemistry

    How many grams of Mg are needed to react completely with 3.80 L of a 2.50 M HF solution? Mg + 2HF --> MgF^2 + H^2

    asked by Lexa
  165. Physics

    If one machine creates a level of 90 decibels, what decibel level would be generated by 50 of these machines? If sounds are created at random, the net intensity is found by adding the individual intensities-not the decibels. Ignore distance effects.

    asked by Lindsey
  166. Chemistry

    How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.90g of Fe2O3 with enough carbon monoxide to produce iron metal? Fe2O3 + 3CO ---> 2Fe + 3CO2 dH=-24.8kJ How do you find q (of the 2Fe in kJ).

    asked by Chris
  167. Physics

    What is the fundamental frequency, the first three overtones of an organ pipe that is 100cm in length ans is closed on one end and open on the other? Take the speed of sound to be 345 m/s.

    asked by Lindsey
  168. statistics

    which has a larger standard deviation: the distribution of weekly allowances to 12-year olds or the distribution of monthly household mortgage payments?

    asked by Jerome
  169. math

    Without writing them all out, what is the number of subsets of set A ={king, queen, knight, prince, princess, duke, earl}?

    asked by nette
  170. math

    The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards than John. After giving some postcards to John, Zachary had 6/7 as many postcards as John. (A) How many postcards did Zachary have

    asked by Katherine
  171. Math

    You are fi ve feet tall and cast a seven-foot eight-inch shadow. At the same time, a basketball hoop casts a 19-foot shadow. How tall is the basketball hoop? Assume the triangles are similar.

    asked by Leila
  172. English

    I forgot to add the following sentences. I really hope you can have a look at them. She assured/informed me that the money had been paid. 1) She promised me that the money would be paid. She confirmed/explained/thought/reported/added that the money had

    asked by Mike
  173. chemistry

    What would happen if NaOH was added to CuSO4

    asked by Anonymous
  174. Calculus (pleas help!!!)

    Find the formula for a function of the form y=Asin(Bx)+C with a maximum at (0.5,0), a minimum at (1.5,−4), and no critical points between these two points.

    asked by Karku
  175. simple subject and predicate

    Many useful tools are made from metal.

    asked by lauren
  176. chemistry

    If 50.0 g of sodium bicarbonate is reacted and 11.0 g of carbon dioxide is produced, what is the percent yield of carbon dioxide? 2NaHCO3 --> Na2CO3 + CO2 + H2O

    asked by Felix
  177. physics

    How does pressure work as a restoring force to create a sound wave?

    asked by John
  178. Chemistry

    What is the pH of a solution that results from the addition of 5mL of 0.1 M HCl to 50mL of pure water?

    asked by Anonymous
  179. Chemistry

    Determine the grams of NaOH that could be absorbed by the SO3/HSO3 buffer before the base absorbing capacity of this buffer were destroyed.

    asked by Anonymous
  180. Salisbury University

    How long will it take a 480 N motor to lift a 335 kg piano to a sixth-story window 15.0 m above?

    asked by Cara
  181. geometry

    The Volumes of two similar figures are given. The surface area of the smaller figure is given. Find the surface area of the larger figure. V= 27m^3 V= 64m^3 S.A.= 63m^2

    asked by Mr. Moo
  182. chem

    How many liters of 12.3 molar NaOH stock solution will be needed to make 12.4 liters of a 1.2 molar NaOH solution? Show the work used to solve this problem.

    asked by jose
  183. Math

    Karla walks 8/10 mile to the library. About how many miles does she walk?

    asked by Gina
  184. Physics

    When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With an arm length of 0.9 m with inertia 0.6 kg m2, what is the speed of the ball just after it is released?

    asked by Sara
  185. Math

    Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?

    asked by Gina
  186. Math

    A picture of a statue is drawn to scale 1:5 If the height of the statue in the picture is 5/6, what is the actual height of the statue?

    asked by Itiel
  187. chem

    Calculate the pH of each of the following solutions. (a) [H3O+] = 2.9 10-10 M- I got 9.5 but its wrong. I used the equation pH= -log[H3O+] Is this the wrong equation? (b) [H3O+] = 6.4 10-2 M thanks:)

    asked by Beth
  188. chemistry

    the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the half-life of cobalt-60

    asked by shaleena
  189. chemistry

    the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the half-life of cobalt-60

    asked by shaleena
  190. English

    I really need you to check these sentences on Owen's poem please. 1)In the second stanza, most of the soldiers succeed in putting on their clumsy gas masks. Someone, however, is still crying out for help, unable to move quickly and easily enough to put on

    asked by Mike
  191. Physics 203

    The system shown below is released from rest. The mb = 35 kg block is 2 m above the ledge. The pulley is a uniform disk with a radius of 10 cm and mass M = 5.0 kg. Assume that the string does not slip on the pulley. (a) Find the speed of the 35 kg block

    asked by Kayla
  192. human services

    i need to write a paper on a time i was discriminated against and how it changed or did not change i am at a loss any help

    asked by searie
  193. trig

    Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?

    asked by justin
  194. Algebra II

    ((x-1)/3x+15))-((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???

    asked by Z
  195. psychology

    Are the cognitive intervention tools: operant conditioning, cognitive rehearsal, positive reinforcement, and journaling? I just want to know if this is correct.

    asked by Mary
  196. Chemistry

    1.What is the molarity of a solution of silver perchlorate, AgClO 4, if 3.2 moles of silver perchlorate are dissolved in 1.5 liters of water?

    asked by Barbara
  197. reading

    In this passage I need to find the main idea and 3 supporting details. You have probably gone on a merry-go-around. Theres one at most theme and carnivals. You find a painted horse or other animal. You climb up on its back. Most of the animals are on the

    asked by christy
  198. Math

    Triangle XYZ is dilated by a factor 1/2. What is the ratio of the area of triangle XYZ to the area of it's image, triangle X'Y'Z'?

    asked by Airelle
  199. Chemistry

    1.What is the molarity of a solution of silver perchlorate, AgClO 4, if 3.2 moles of silver perchlorate are dissolved in 1.5 liters of water?

    asked by Barbara
  200. Science

    What causes a penulum to continue swinging? Answer In 5 sentences

    asked by Itiel
  201. Statistics

    According to a poll, 20% of adults smoke. In a random sample of 75 adults, 30 are smokers. Is this unusual?

    asked by Anonymous
  202. English

    Select the answer that contains the correct punctuation for the following sentence. Presidents wives have always played important social roles. A. The sentence is correct. B. President's' wives... C. President's wives... D. Presidents' wives... I think

    asked by anthony
  203. geometry

    If the polygon is an equilateral triangle where each side is 24 inches long what is the apothem?

    asked by Anonymous
  204. World history

    why did Germany grow as an industrial power under otto von bismarck.

    asked by bilal
  205. Calculus (pleas help!!!)

    Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.

    asked by Claudia
  206. World history

    what is the Kulture kampf

    asked by bilal
  207. World history

    what was the foreign policy of william the 2nd

    asked by bilal
  208. Science

    Answer in 5 sentences What causes a pendulum to continue swinging?

    asked by Danniela
  209. World history

    why did the revolution of 1900s take place

    asked by bilal
  210. World history

    how did the german goverment encourage economic developlment?

    asked by bilal
  211. World history

    in which country was nationalism the biggest threat?

    asked by bilal
  212. anatomy

    Compare and contrast the two feedback mechanisms our bodies use to maintain homeostasis what would happen if our thermoregulation used positive feedback to maintain homeostasis

    asked by mark
  213. Geography

    Name some Australian Icons, excluding animals. I am SOOOOOOOO stuck on this! All I can think of are Koala's and Kangaroos...

    asked by Rissa
  214. math

    Find a value of n when the sq. root of n^2 is NOT n.

    asked by ABC123DOREMI
  215. math- algebra- help please!

    12 points lie on a circumference of a circle how many inscribed triangles can be constructed having 3 vertices?

    asked by Steph
  216. MATH

    What is $1294.00 Plus HST? HST = 12%

    asked by Anonymous
  217. biology

    What is the typical ratio for a dihybrid cross between two parents that are double heterozygotes?

    asked by stella
  218. physics

    alpha particles are accelerated through a potential of 1000volts and then enter a magnetic field 0.2T perpendicular to the their direction of motion.Calculate the radius of the circular path that they traverse.An alpha particle has a mass 6.68x 10^-27kg

    asked by kb
  219. math- algebra- help please!

    3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5

    asked by Zach
  220. spanish

    Rewrite each statement two ways using object pronouns. Tengo que leer los libros en una semana.

    asked by Nick
  221. english

    Are the pronoun refrences clearly started in these sentences? 1. The governor t told the mayor that she would win by a landslide. 2. When the mayor thanked the governor, she was happy. 3. People who wish to vote must do so before 7:00 p.m., for after that

    asked by Aanthony
  222. english

    Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?

    asked by jess
  223. math

    a single numbered standard cube is tossed. what is the probability of getting a number other than nine

    asked by sergio
  224. Pre-Algreba

    The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards than John. After giving some postcards to John, Zachary had 6/7 as many postcards as John. (A) How many postcards did Zachary have

    asked by Angie
  225. MATH

    Consider following situation.. You are going to buy this laptop at $1294.00 plus HST. You can also pay $50 a month for 30 months with down payment of $100. Compare following 3 scenarios using spreadsheets to calcuate how much you will pay. 1st Scenario:

    asked by Anonymous
  226. chemistry

    I need help with the equilibrium constant, i understand it but I don't understand the last step when you have to change or find the exponent?

    asked by HS
  227. physics

    A tank filled with water has marks every 10 cm on one wall. The refractive index is 1.33 for water in the tank. You observe the marks out in air, from the opposite wall and with your eye level with the top of the water. Which is the lowest or highest mark

    asked by crystal
  228. math

    how would you solve this equation? 294 sin^2 theta = 196 sin 2 theta

    asked by alexa
  229. English

    Rewrite the sentences with the pronoun refrences clearly stated.. 1. The governor told the mayor that she would win by a landslide. 2. when the mayor thanked the governor, she was happy. 3. people who wish to vote must do so before 7 pm, for after that you

    asked by Anthony
  230. Chemistry

    Write the equation for the dissolution of (NH4)2S04 in water. How many moles of each type of ion, and how many total moles of ions does the dissolution of 0.5 mol of (NH4)2S04 produce? help pleaseeeeee ASAP

    asked by Kelly
  231. Physics

    You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each tire as a solid cyllinder (to calculate inertia) with a mass of 0.5 kg. What is the total rotational kinetic energy of the

    asked by Anonymous
  232. project management

    Does anyone have the audit of the gauchito project plan

    asked by project management
  233. Physics

    Which of the following events does not involve a change in angular momentum? 1. A spinning ice skater drawing in her arms to increase her rotational speed. 2. A child walking along the perimeter of a merry-go-round as it rotates. 3. A child walking towards

    asked by Anonymous
  234. chemistry

    Write the overall ionic equation and the net ionic equation for the reaction between BaCl2 and Na2SO4 in aqueous solution, indentify the spectator ion and the precipitate ion for this reaction. help :(

    asked by Kelly
  235. algebra

    t squared plus 10t plus 16

    asked by ruth
  236. science

    if you observe that the air pressure is decreasing, what type of weather will it bring?

    asked by jordonna
  237. Calculus Please Help

    Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.

    asked by Claudia
  238. marketing please help me

    please can you help me for this question to get the right answer,,,, distinguish among a product modification a minoy innovation and a major innovation.present an example of each for a hotel

    asked by jessie
  239. science

    Compare table salt with glucose.

    asked by unknown
  240. Math

    Wendy answered 85% of the questions other history test correctly . There were 40 questions on the test and all the questionable had equal value. How many questions did Wendy not answer correctly on her test?

    asked by SunnyDee
  241. science

    write a brief paragraph that tells how the words matter,element,atom,crystal,compound,and molecule relate.

    asked by unknown
  242. Physics

    What is the magnitude of the force per meter of length on a straight wire carrying an 8.50 -A current when perpendicular to a 0.55 -T uniform magnetic field?

    asked by Samantha
  243. topics of math

    A population is normally distributed with mean 43.7 and standard deviation 5.2. Find the following probability. (Round your answer to four decimal places.) p( x > 55.0 )

    asked by Hannah
  244. physics20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?

    asked by Ty
  245. physics

    In preparation for a demonstration on conservation of energy, a professor attaches a 7.2-kg bowling ball to a 3.4-m-long rope. He pulls the ball 23° away from the vertical and holds the ball while he discusses the physics principles involved. Assume that

    asked by Anonymous
  246. Chemistry

    If you have 200 mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

    asked by asdffffff
  247. physics 20

    DYNAMICS: a skier starts at the top of a 30m hill ta an anle of 20 degrees. the skier goes straight down the firctionless slope. How long will it take the skier to get to the bottom?

    asked by Ty
  248. ap chemistry

    For propanoic acid (HC3H5O2, Ka = 1.3 10-5), determine the concentration of all species present, the pH, and the percent dissociation of a 0.29 M solution. [H+] [C3H5O2-] [OH -] [HC3H5O2] pH percent dissociation

    asked by Ryu
  249. Physics 20

    dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is

    asked by bob
  250. chem

    Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]

    asked by Beth
  251. Accounting

    Alteran Corporation purchased a machine for 1.5 million in 2006. The machine is being depreciated over a 10-year life using the sum-of-the-years'-digits method. The residual value is expected to be $300,000. At the beginning of 2009, Alteran decided to

    asked by Bobbi Loffredo
  252. Physics 20

    Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?

    asked by peter
  253. physics 20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?

    asked by peter
  254. Writing

    The propmt is Write a story about a time that I did something that caused me to feel pride in myself. What is this action and why did it make me feel pride in myself. I need help writing a story into this and you proofread and revise my grammaticly

    asked by Rebecca
  255. chemistry

    Consider the following reaction Al(OH)3 + 3HCL ____>ALCL3 How many milliltres of 0.8 M HCL will react with 2g of AL(OH)3 ??

    asked by roro
  256. Accounting

    Janes Company provided the following information on intangible assets: a. A patent was purchased from the lou Company for $700,000 on January 1, 2007. Janes estimated the remaining useful life of the patent to be 10 years. The patent was carried on Lou's

    asked by Bobbi Loffredo
  257. physics

    1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?

    asked by arun
  258. math

    2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.

    asked by arun
  259. math

    a shipping box is shaped like a rectangular prism.it has a total volume of 96 cubic inches. the height is two inches less than the width. what are the dimensions of the box?

    asked by briana
  260. Language arts

    What kind of sentence is: The state park in the rocky mountains is beautiful, lots of things to do.

    asked by Troy
  261. Math

    Write two numbers that have the given absolute value. 4 38 260 4092 I know one is 4 but do not know the second unless it is -4 Do not have no clue can someone explain?

    asked by Scott
  262. physics

    A ladder of mass 34.4 kg and length 3.36 m is leaning against a wall at an angle θ. The coefficient of static friction between ladder and floor is 0.326; assume that the friction force between ladder and wall is zero. What is the maximum value that θ can

    asked by Anonymous
  263. Chemistry

    A sample of iron with a mass of 75.66g and an initial temperature of 15.38C gains 10480 Joules. What is the final temperture?

    asked by Lewis
  264. math

    if i am solving a linear combanation nd it is y=-2+5 and 2x+7y

    asked by lasharon
  265. Physics

    A car of mass = 1200 traveling at 60.0 enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car's tires.What is the radius of the turn if = 20.0 (assuming the car continues in uniform

    asked by Brooke
  266. Math (logarithmic functions)

    Those are the only ones I can't seem to resolve. Thank you! resolve x: 1) 9*3^0,51x = 315 2) 10*3^15x+21 =363*2^9x+51 3) log(15x^2) - log(3x) = 4*log(3) 4) log[of base 3]*(15x + 4) = 3

    asked by Ralph
  267. Chemistry

    How does HI(g) split into H and I? 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so, then can HI(g) collide with anything (H or I or the wall) to split up?

    asked by BlahxD
  268. Math

    14. Parks A survey of 300 parks showed the following. 15 had only camping. 20 had only hiking trails. 35 had only picnicking. 185 had camping. 140 had camping and hiking trails. 125 had camping and picnicking. 210 had hiking trails. Find the number of

    asked by Sarah
  269. Chemistry

    How does HI(g) split up into H and I. 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so then, can HI collide with anything ( H, I, the wall) to break down into H and I?

    asked by BlahxD
  270. Chemistry!

    a microwave oven uses electromagnetic radiation with a wavelength of 3.00x10^6 nm. calculate energy (in joules) of 1.65 moles of photons of this radiation.

    asked by Rachel
  271. Chemistry

    How does HI(g) split up into H and I. 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so then, can HI collide with anything ( H, I, the wall) to break down into H and I?

    asked by BlahxD
  272. Physics

    A 5.o kg box is lifted to a height of 10 meters at a constant speed. a)How much power is required to complete this task in 10 seconds? b)Calculate the velocity of the box just as it hits the ground? i have the answers but i need a second opinion a)50 watts

    asked by Mexico
  273. World history

    What was the foreign policy of William the 2nd?

    asked by Demond
  274. math

    Prove eachh mathematical statement for integers m,n,k,p,a,b 12. For every prime p and nonzero n we have n^2 is congruent to nMODp if and only if either n is congruent to 1MODp or n is congruent to 0MODp.

    asked by Anna
  275. physics

    A light ray parallel to the optical axis of a glass sphere of radius R enters the sphere at height H above the axis (H

    asked by crystal
  276. Physical Geography, Earth Science

    Who were the four other major contributors to the development of modern astronomy after Copernicus? Explain what those contributions were. Finally, why did it take so long for the geocentric view of the universe to be overthrown and what does that tell us

    asked by Chaseone
  277. Science

    what is biomass?

    asked by Anonymous
  278. Physics

    A 5.o kg box is lifted to a height of 10 meters at a constant speed. a)How much power is required to complete this task in 10 seconds? b)Calculate the velocity of the box just as it hits the ground? i have the answers but i need a second opinion a)50 watts

    asked by Mexico
  279. math

    a hotel chain charges $120 per room and rents an avg of 40 rooms per night at this rate. For each $10 reduction in price, they rent an avg of 10 more rooms. Find the rate they should be charging to maximize revenue. Help please! Thanks!

    asked by cat
  280. math

    a hotel chain charges $120 per room and rents an avg of 40 rooms per night at this rate. For each $10 reduction in price, they rent an avg of 10 more rooms. Find the rate they should be charging to maximize revenue. Help please! Thanks!

    asked by cat
  281. Ap physics b

    A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m.

    asked by christina
  282. Art Appreciation

    Explain how Florence reflects the ideals of the dominant city-state and how some of the geographical, economical, social, and artistic forces shape this ideal. Use one example from Gardener’s Art through the Ages and one example from the Internet.

    asked by Alice
  283. MATH

    Im Struggling with this assignment here. Would like help ASAP. Consider following situation.. You are going to buy this laptop at $1294.00 plus HST. You can also pay $50 a month for 30 months with down payment of $100. Compare following 3 scenarios using

    asked by Anonymous
  284. Physics

    The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.97×1024 kg. The Earth's average radius is 6.38×106 m. What is the magnitude of the gravitational force that the Earth

    asked by Denise
  285. Microbiology

    What is the purpose of agar in media?

    asked by Dakota
  286. Microbiology

    How would you determine whether a colony was a containminant on a streak plate?

    asked by Dakota
  287. Physics

    The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.97×1024 kg. The Earth's average radius is 6.38×106 m. What is the magnitude of the gravitational force that the Earth

    asked by Denise
  288. grammar

    how can i rephrase this sentence WITHOUT using any personal pronouns --do you think the dough will rise the fastest in the sample with the highest, lowest, or a moderate concentration of sugar? thank you!

    asked by Sara!
  289. College Algebra

    What is the difference between direct variation and joint variation and please put into words an example.

    asked by Kathy
  290. trig

    If an equilateral triangle has a side of 10 ft what is its altitude to two significant digits

    asked by Michelle
  291. geometry

    Consider the coordinates given and decide whether BC and DE are parallel, perpendicular, or neither B(3, -3), C(-3, -7), D(6, -5), E(0, 4) B(4, -7), C(1, 2), D(2, -8), E(-4, 10) B(-4, 0), C(2, 2), D(1, 4), E(2, 7)

    asked by Step
  292. Calculus (urgent!!)

    Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.

    asked by Claudia
  293. Workplace Hazards and Safety

    Describe and explain 5 rights and/or responsibilities of the worker with regards to safety in the workplace. This is the information I have: Worker's responsibilites: -Cooperate with the joint committee or worker health and safety representative,

    asked by Anonymous
  294. geomery b

    I need help understanding this so please help me?? 1. A table is 4 ft high. A small model of the table is 6 in. high. What is the ratio of the height of the model table to the height of the real table? 2 : 3 1 : 6 1 : 8 2 : 6 2. If a/b = 9/10, complete

    asked by Jesicca
  295. Calculus (pleas help!!!)

    Let f(x)=e^(2x)-kx, for k greater than 0. Using a calculator or computer, sketch the graph of f for k=1/9, 1/6,1/3,1/2,1,2,4. Describe what happens as k changes. f(x) has a local minimum. Find the location of the minimum. x= ____ Find the y-coordinate of

    asked by Eva
  296. Math

    how does (2) / √[(2+√(2))] become (2-√(2))√[(2+√(2))] steps too please

    asked by Amy
  297. math

    how to put weights in order from least to greatest

    asked by tyana
  298. chemistry

    The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL. Part 2 Recalculate the pH of

    asked by John
  299. Finance

    what would happen if i had a credit card with $2000 dollars on it with an interest rate of 10%.the minimum payment is $50 a month how long would it take to pay off

    asked by dana
  300. English

    Describe and explain 5 rights and/or responsibilities of the worker with regards to safety in the workplace. This is the information I have: Worker's responsibilites: -Cooperate with the joint committee or worker health and safety representative,

    asked by Anonymous
  301. Physics 20

    Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?

    asked by peter
  302. math

    Consider the function f(x) whose second derivative is f''(x) = 5 x + 6 \sin (x). If f(0) = 4 and f'(0) = 2, what is f(x)?

    asked by thomas
  303. accounting

    a merchandising company wants to include the cost of operating its warehouse in the cost of inventory. The company’s controller argues that the cost of the warehouse is a reasonable and necessary cost of getting the inventory ready for sale and,

    asked by nisa
  304. math

    The density of a crystal is 2.65 grams per cubic centimeter. Ryan has a rectangular prism made of quartz. It measures 10 cm by 10 cm by 6 cm. Find the weight of this crystal in kilograms.

    asked by Dan
  305. chemistry

    How many molecules water are produced from 33 g lithium hydroxide? and work the slove

    asked by Austin5
  306. English

    Please check for comma errors. If I need to add any commas or take some out please show me where. Thank you!! You seem to be progressing nicely after your back surgery; however, I do want to remind you of the importance of the instructions that was give to

    asked by Angela
  307. English-Help

    Please check for commas errors. If I need to add or take out any commas, please show me where. Have you quit trying to train your dog? Don’t be discouraged. We have the answer to your problem. Professional obedience training can make an amazing different

    asked by Angela
  308. Calculus (urgent!!)

    Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.

    asked by Claudia
  309. Calculus Please Help

    If 1100 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. I'm supposed to type the answer in cubic centimeters... my answer was 2500 cm^3 but it's wrong... I have also

    asked by Eva
  310. ENGLISH

    Please check for commas errors and capilization. If I need to add or take out any commas, please show me where. Nashville, TN, November 9, 2011: Anisha Carter was named the new president of M& M Industries, and will take commands of the company on November

    asked by Angela
  311. math

    the density of a diamond is 3.52 grams per cubic centimeter. Sally has a diamond that has a volume of 20 mm^3. What is the weight of the diamond?.

    asked by Dan
  312. chemistry

    210 210 Pb --> Bi + ? 82 83 60 0 Co --> ? + e 27 -1 I need an explanation on how to find the missing product.

    asked by andrew
  313. Enghlish-Now

    Please read any if I need to add any commas or delete any, please let me kow where. Thank you!! Your presentation the Martin Managerial Conference in Chicago was excellent. While you were speaking, the audience was more attentive than they had been at any

    asked by Angela
  314. Math

    If you pay 3.5 % interest over 4 years and the interest earned is $498.40 what is the principal

    asked by Michelle
  315. Help with English

    Pleae check for any comma errors or capialization.If I need to add or delete any commas, please let me know where. Thank you!! You are invited to our private inventory sale, beginning on Wednesday, June 1 through Saturday, June 12. It is a Kingston

    asked by Angela
  316. Calculus Please Help

    Let f(x)=e^(2x)-kx, for k greater than 0. Using a calculator or computer, sketch the graph of f for k=1/9, 1/6,1/3,1/2,1,2,4. Describe what happens as k changes. f(x) has a local minimum. Find the location of the minimum. x= ____ Find the y-coordinate of

    asked by Eva
  317. English

    1. The guide (lead, led) the hikers to the river. 2. Marlo has (passed, past) the fitness test with flying colors. 3. By the time we got to the store, it was (already, all ready) closed. 4.Honesty is just one of the (principals, principles) of Tamika's

    asked by Hayley
  318. CALC

    point on the hyperbola 9x^2−6y^2=10 closest to the point (0, 7). y coordinate of each point= ? positive x coordinate= ? negative x coordinate= ?

    asked by Adrianna
  319. Chemistry

    A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g.

    asked by Linda
  320. Chemistry

    Would the molar mass become high or low if the hole in aluminum foil was quite large?

    asked by Linda
  321. physics 20

    DYNAMICS: a skier starts at the top of a 30m hill ta an anle of 20 degrees. the skier goes straight down the firctionless slope. How long will it take the skier to get to the bottom?

    asked by peter
  322. Chemistry

    Would the molar mass become high or low if water vapors condensed under the aluminum foil before the final weighing?

    asked by Linda
  323. physics

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?

    asked by peter
  324. Physics 20

    dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is

    asked by peter
  325. Calculus (pleas help!!!)

    Let p(x)=x^2(a−x), where a is constant and a greater than 0. Find the local maxima and minima of p. (Enter your maxima and minima as comma-separated xvalue,classification pairs. For example, if you found that x=−2 was a local minimum and x=3 was a

    asked by Claudia
  326. poetry

    What form of poetry are Robert Frost's "The Road Not Taken," and "Saturday Night" by Alden Nowlan? Thanks!

    asked by Misha
  327. psychology

    the more people there are at the scene of an accudent, the less likely it is that individuals will step up to lend a hand this phenomeon is referred to as? a.)antiscoial behavior b.) diffusion responsibility c.)crowd apathy d.) diffusion of interest

    asked by alisha s
  328. chemistry1

    how much heat is needed to melt 25.4 grams of iodine at its melting point?(Hfusion+61.7J/g)

    asked by kara
  329. Chemistry

    Explain exactly how you would make 1 liter of a .10 M acetic acid solution using vinegar from the lab as the stock solution to be diluter.

    asked by Haley
  330. chemistry

    how much heat is needed to change 20 g of solid water at 0 c to liquid water at 15 c?

    asked by Shawnie
  331. Physics 20

    DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?

    asked by peter
  332. physics

    A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be one-fourth as tall as the object. i really need help on this one. im completely stuck!

    asked by julie
  333. math

    If you triple 4 and subtract 2 each day, how many days until you have zero?

    asked by JOE
  334. Finance

    You have just placed $1,500 in a bank savings deposit and plan to hold that deposit for eight years, earning 5½ percent per annum. If the bank compounds interest daily, what will be the total value of the deposit in eight years? How does your answer

    asked by cortesa
  335. algebra

    Find f(x) and g(x) such that f(g(x))= square root of x over 6 square root of x+5 .

    asked by marjorie
  336. Chemistry

    An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is

    asked by Shannon
  337. physics

    A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a

    asked by Jess
  338. Chemistry

    Consider the reaction 2 SO2 + O2 in equilibrium with 2 SO3 . At 25°C Ho = -197.78 kJ and So = -187.95 J/K. Using this information, calculate the equilibrium constant for the reaction at 50°C. (R = 8.314 J/K) Enter your answer using TWO significant

    asked by Laura