Questions Asked on
July 16, 2012

  1. physics

    A charge of 4.00 mC is placed at each corner of a square 1.05 m on a side. Determine the magnitude and direction of the force on each charge.

    asked by jordyn
  2. Probability and Statistics

    For questions 1- 5 use confidence intervals to test the hypothesis. 1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested

    asked by Alexus
  3. Chemistry

    0.000333 g fluorescein (332.32 g/mol) is dissolved in 225 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)? How many ppm? I already know that the molarity is 4.45E-6. I just need help

    asked by Vince
  4. Chemistry

    A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) --> N2(g) + 3H2(g) At equilibrium, it was found that the concentration of H2 was 0.0584 M, the concentration of N2 was 0.0195 M, and the concentration of NH3 was 0.430 M. What was

    asked by Blake
  5. College Chem

    How many molecules of CH3OH will contain 3.20 x 10^23 H atoms?

    asked by Mark
  6. Probability and Statistics

    For questions 6 - 10 use the chi-squared distribution to test the hypothesis. 6) A restaurant owner wants to see if the business is good enough for him to purchase a restaurant. He asks the present owner for a breakdown of how many customers that come in

    asked by Alexus
  7. English

    I helped my mother wash the dishes. I helped my mother clean the house. I helped my mother ironing some clothes. I vacuumed the floor. I cleaned the floor with a mop. I cleaned the study which was messy. I cleaned the veranda where there were a lot of

    asked by rfvv
  8. chem

    a pipet delivers 9.04,9.02,9.08,9.06 ml in consecutive trials.find the mean volume and the average deviation from the mean

    asked by vanessa
  9. physical

    You are driving along a highway at 27.7 m/s when you hear a siren. You look in the rear-view mirror and see a police car approaching you from behind with a constant speed. The frequency of the siren that you hear is 1830. Hz. Right after the police car

    asked by itufizik
  10. Chemistry

    For the reaction 2NH3(g) 3H2(g) N2(g) at 472oC equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37x10^_8 M. What is the equilibrium constant for the reverse reaction?

    asked by joe
  11. Psychology

    The facial-feedback hypothesis tells us that? A. smiling makes a person feel better. b. facial expressions are of little importance in communicating. c. we can tell how a person is feeling by his or her facial expression. d. smiling is often a cover-up for

    asked by Echo
  12. Math Gr12 (advanced functions)

    A tower that is 65m high makes an obtuse angle with the ground. The vertical distance from the top of the tower to the ground is 59m. What obtuse angle does the tower make with the ground?

    asked by Tim
  13. Algorithm

    write a pseudo code algorithm that will accept the marks in a test for a group of 25 students then calculate and display the average mark

    asked by chinna
  14. Math

    Jeff is changing the shape of his sandbox from 10 feet long by 12 feet wide to a square that has the same area. What is the perimeter of the square sandbox, rounded to the nearest hundredth?

    asked by Jeff
  15. chemistry

    At –14.5 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to 3.00 kg of pure water and still have the solution freeze

    asked by Anonymous
  16. human biology

    A 56 year old obese male is rushed to the ER via ambulance. The EMS team reports he was found non- responsive and in shock. Additionally, they note he has a stiff rigid abdomen and can feel a large lump near the midline. Upon questioning, his wife

    asked by Michelle
  17. Chemistry

    0.000341 g fluorescein (332.32 g/mol) is dissolved in 255 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)?

    asked by Anon
  18. physics

    A +5.0 µC charge is placed at the origin and a -3.9 µC charge is placed at x = 25 cm. At what coordinates can a third charge be placed so that it experiences no net force?

    asked by danielle
  19. jess

    Sadie the dog is sitting on the roof of his doghouse, 4.5 ft off the ground. He is watching a cat that is 16 ft away from the base of the doghouse. What is the angle of depression from the roof of the doghouse to the cat? Round to the nearest hundredth.

    asked by layla
  20. math

    1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested and the researcher found that the average life of each light bulb

    asked by Alexus
  21. algebra

    A rectangular garden, with length twice its width, is to be expanded so that both sides are increased by 3 m. a.) How would you represent the width of the original garden? b.) How would you represent the width of the new garden? How about the length? c.)

    asked by Sella
  22. Algorithm

    write a pseudo code algorithm that will accept 20 numbers and finds their product

    asked by chinna
  23. Statistics

    You are getting ready to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at a large chain of department stores. A previous survey from the same population found a standard deviation of $18.

    asked by Devika
  24. Math

    David the monkey is looking down at a 33° angle from the top of a tree. There are bananas on the ground 42.7 ft from the base of the tree. If David flies down from the tree in a diagonal path, as shown in the diagram, what distance would he travel? Round

    asked by shailene
  25. Microecomics

    Assume that American rise sells for $100 per bushel, Japanese rice sells for 16,000 yen per bushel, and the nominal exchange rate is 80 yen per dollar. Explain how you could make a profit from this situation. What would be your profit per bushel of rice?

    asked by Jorge
  26. statistics

    A random sample of size 81 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 43 minutes, and the sample standard deviation 5.71 minutes. Construct a 95% confidence

    asked by Devika
  27. PHYSICS

    At 25 m from a sound source, the intensity level is 55 dB. What's the level at distance of 56m? What's the level at distance of 273m?

    asked by jR
  28. Permutations

    A valid password on a Web site contains 3 letters (A-Z, 26 total), followed by 3 digits (0-9). Letters and numbers can be repeated. The number of possible passwords equals _____. A. 26*25*24+10*9*8 B. 26^3+10^3 C. 26^3*10^3 D.26*25*24*10*9*8

    asked by Tifini
  29. physical

    Two people are talking at a distance of 2.49 m from where you are, and you measure the sound intensity as 1.47 · 10–7 W/m2. Another student is 4.79 m away from the talkers. What sound intensity does the other student measure?

    asked by itufizik
  30. US History and Constition

    What is the purpose of the Monroe Doctrine ?

    asked by Alexus
  31. SCIENCE

    A police man is driving a car with a speed of 30km/h,and firing a bullet having a speed of 150m/s towards another car which is moving ahead with a speed of 192km/f.At what speed will the bullet hit the car?

    asked by SWAPAN
  32. Health

    Visit the website for Board of Medical Examiners or the State Board of Nursing for the state in which you live. Post a 200- to 300-word response to the following: What is the purpose of the agency? What services does the agency perform? How does the agency

    asked by Marty Oliver
  33. US History and Constition

    1. Eli Whitney intended his cotton gin to help eliminate slave labor. Why did it increase it? 2. What is the purpose of the Monroe Doctrine in a paragraph of at least 5 sentences? 3. By 1828 presidential electors were chosen by popular vote in every state

    asked by Alexus
  34. PreCalc

    A square has side lengths of 24 cm. It is divided into four equal sections (as shown in the first picture) and then two of those sections are shaded. One of the unshaded sections is then divided into four equal sections and two of those are shaded (as

    asked by Anonymous
  35. English

    I studied science last night. I had a good time with my family. I called Eunhui and talked for a long time. I took a shower in the bathroom. I made cheese cakes with my mother. I sent some e-mails to my friends. I bought a wallet at Home Plus. I read a

    asked by rfvv
  36. Physica

    (Please put the resulting figures and Thanks)))) a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is

    asked by 19191919
  37. Math

    If you buy a $1395 savings bond that pays 4.3% annual simple interest. Determine the value of the bond after 7 years.

    asked by Meredith
  38. Chemistry

    The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular weight for chlorophyll

    asked by Anonymous
  39. Math

    What is the length of each side of a square that has the same area as a rectangle that is 12 mm long and 18 mm wide?

    asked by Katie
  40. physical

    You are traveling in a car toward a hill at a speed of 42.1 mph. The car's horn emits sound waves of frequency 251 Hz, which move with a speed of 343 m/s. a) Determine the frequency with which the waves strike the hill. b) What is the frequency of the

    asked by itufizik
  41. English

    Very weird SAT "sentence completion" question The literal meaning of astronaut is "---" a) Space Jockey b) Cosmic navigator c) Star sailor d) Space pilot e) Sky pilot

    asked by Willie
  42. Sociology

    Write a 1,000-1850 -word response in which you consider specific types of communication, common miscommunications among genders, and effective communication strategies. Address the following questions: o What type of verbal and nonverbal communication do

    asked by Courtney
  43. Math 126

    These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 7/15/2012 Time Spent: h , min , 19 secs Points Received: 18 / 20 (90%) Question Type:

    asked by Anonymous
  44. Physica

    If the length of a wire is doubled and its cross – section area decreased to half ,the resistivity of the wire becomes a)the same b)four time c)half d)one fourth e)double

    asked by ax
  45. Finance Management

    CASE STUDY 1 please read the continuing case at the end of Chapters 1 and 2 in your textbook. After studying the Chapter 1 case, respond to the following: 1.At which level do some of the basic functions (cost accounting, reporting tax, patient accounts and

    asked by Casey
  46. Chemistry

    If you reclaim 0.250g Ag from AgNO3, how much AgNO3 did you have to begin with?

    asked by Kristin
  47. Algebra

    Without graphing, describe the end behavior of the graph of f(x) = -5X^2 - 3X + 1 Please explain

    asked by Cassie
  48. Math

    the number sacks necessary for a 4inch sidewalk 6ft wide and 27ft long at 6 sacks of cement per cubic yard of concrete is?

    asked by O
  49. Math

    1.) A security code has seven characters. Each code begins with two digits, then two letters, and finally three digits. the number of distinct security codes possible if repetition is allowed? 2.) How many ten digit phone numbers are possible if a number

    asked by Emily
  50. Math

    If there are 7 people at a party and four pizza's and each person eats 3/8 of the pizza. How much pizza is left?

    asked by Aaron
  51. College Chem

    A mixture containing 5.0 g of H2 and 10.0g of O 2 is allowed to react in a 15.0L container at a constant temperature of 25.0 C. Once the reaction is complete, what will be the pressure of the excess gas inside the container?

    asked by Mark
  52. Chem

    Can a 100ml sample of 3.0m H2 SO4 could be neutralized by 100 ml of 3.0m NH3

    asked by natalie
  53. Math

    Solve: 3x + 7y + 5= 0 4x - 3y - 8 = 0 Find p; if: px + y - 1= 0

    asked by Mayank
  54. math!!!

    Molten plastic is injected into the centre of a circular mold of constant height, H, through a small hole. The rate of injection is such that the radius of the plastic inside the mould increases so that r(t)= 3t^2 -2t^3 where the mold has maximum radius of

    asked by HADEEL
  55. maths

    Find the speed and direction of a particle which, when projected from a point 15 m above the horizontal ground, just clears the top of a wall 26.25 m high and 30 m away. Thanks!!!!

    asked by Michelle
  56. physics

    A person is driving an automobile at 95 km/h and throws a bottle of mass .600 kg straight out the window. a) With what momentum does the bottle hit the roadway sign? b) With what momentum does the bottle hit an oncoming automobile traveling in the opposite

    asked by Oja
  57. physical

    You are playing a note that has a fundamental frequency of 466.16 Hz on a guitar string of length 59.9 cm. At the same time, your friend plays a fundamental note on an open organ pipe, and 4.0 beats per seconds are heard. The mass per unit length of the

    asked by itufizik
  58. algebra

    for which values of a and b does the following pair of linear equation have an infinite number of solution ? 2x+3y=7 (a-b)x+(a+b)y=3a+b-2

    asked by somiya
  59. math

    A jar contains 3 pink balls, 6 blue balls, and 3 red balls. Event A = drawing a red ball on the first draw Event B = drawing a pink ball on the second draw If two balls are drawn from the jar, one after the other without replacement, what is P(A and B)

    asked by Anonymous
  60. American History

    The 1978 Supreme Court decision in Bakke v. Regents of the University of California A. ruled in favor of affirmative action within specified limits. B. established the "red state-blue state" divide. C. ruled against the principle of affirmative action. D.

    asked by Elina
  61. physical

    Two identical half-open pipes each have a fundamental frequency of 450 Hz. What percentage change in the length of one of the pipes will cause a beat frequency of 13.0 Hz when they are sounded simultaneously? Assume the speed of sound in air is 342 m/s.

    asked by itufizik
  62. Physics(Rotational Energy)

    Suppose three masses are arranged as shown, connected by a rodless mass. (2 kg)-------(6 kg)--------(4 kg) 2m 3m a) If this object is free to rotate in space, about what point will it spin? b) A small mass (m=0.1 kg) drops vertically onto the2 kg mass

    asked by ChristinaNguyen
  63. english

    I would like to know if this would be a good thesis to prove for the novel: The Great Gatsby. Thesis: Nick Carraway as the author has both its advantages, and its disadvantages; Nick begins the novel as an objective character full of honest thoughts, yet

    asked by Justin
  64. math

    there are 10 marbles in a bag: 1 blue, 4 yellow, 3 red, and 2 white. if you choose a marble at random, what is the probability that you will NOT choose white?

    asked by jake
  65. Chem

    A mixture containing 5.0 g of H2 and 10.0g of O 2 is allowed to react in a 15.0L container at a constant temperature of 25.0 C. Once the reaction is complete, what will be the pressure of the excess gas inside the container?

    asked by Mark
  66. PreCalc

    1) Determine the value of r (put this number in the first blank) and then determine the value of the 10th term of the geometric sequence. Do not use any decimals or mixed numbers in your answers. Reduce all fractions to lowest terms. a1 = 2 and a4 = −1/4

    asked by Anonymous
  67. Math

    Solve: 3x + 7y + 5= 0 4x - 3y - 8 = 0 Find p; if: px + y - 1= 0

    asked by Mayank
  68. math help!!

    Suppose a function, f(x) has a vertical asymptote toward positive infinity at x= -1, A horizontal asymptote at y = 1=2 as x ¨}‡1, and a turning point at (1;-1). Sketch what you think the function would look like.

    asked by HADEEL
  69. chem

    three students each measured the boiling point of water at each destination person 1 had boing point of 93.9 c 2nd person found boiling point of 101.1 c 3rd person found boing point of 100.0 c. which student went water skiing in honolulu? which student

    asked by tina
  70. psychology

    Is realization (any kind) always a good feeling? If not, can you give examples where it's not? Thank you in advance.

    asked by Namie
  71. Physica

    a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is

    asked by 1919
  72. english

    Would Steven Spielberg be a good speaker for a school assembly? Write a letter convincing your principal that Steven Spielberg would or would not be a good speaker for an assembly at your school. Use information from the passage to support your argument.

    asked by cj
  73. civics

    What are the constitutional checks on the power of the Supreme Court?

    asked by anonymous
  74. geometry

    If the probability of seeing moose in a day in a certain region of Alaska is 0.74, what is the probability of not seeing any moose in a day there?

    asked by angela
  75. Operating Systems

    What two ways (key stroke(s)) do you use to end the COPY CON command?

    asked by Prav
  76. Physica

    If the length of a wire is doubled and its cross – section area decreased to half ,the resistivity of the wire becomes the same ( put true or false) pleas drwls

    asked by lllllllll
  77. geometry

    If the measure of the arc LN=80° and the measure of arc OP=50°, then m∠M=___.

    asked by dfd
  78. Integrated Math 1

    A valid password on a Web site contains 3 letters (A-Z, 26 total), followed by 3 digits (0-9). Letters and numbers can be repeated. The number of possible passwords equals _____. A. 26*25*24+10*9*8 B. 26^3+10^3 C. 26^3*10^3 D.26*25*24*10*9*8

    asked by Tifini
  79. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by SAMARA
  80. Permutations

    A valid password on a Web site contains 3 letters (A-Z, 26 total), followed by 3 digits (0-9). Letters and numbers can be repeated. The number of possible passwords equals _____. A. 26*25*24+10*9*8 B. 26^3+10^3 C. 26^3*10^3 D.26*25*24*10*9*8

    asked by Anonymous
  81. english

    Hi, I posted my essay earlier for punctuation, corrections, and I really need help correcting the following from the essay: -I read the Quran everyday of my life to learn and get inspired from. -The book had this amazing story about a Woman that was cured

    asked by zee
  82. calculus

    A force of 13 N is needed to keep a spring with a 2-kg mass stretched 0.25 m beyond its natural length. The damping constant of the spring is c = 8. If the mass starts at the equilibrium position with a velocity of 0.5 m/s, find its position at time t.

    asked by nicholas
  83. math

    if iron weighs 0.25lbs. per cubic inch, an iron bar 8'6" by 4" by 1/2" weighs?

    asked by O
  84. philosophy

    Write a 700- to 1400-word fictional dialogue illustrating the ideas of Plato and Aristotle. I don't want someone to do for me just someone to help me start.

    asked by Donna
  85. algebra

    if 2k - 4 = 8, then k is what

    asked by becca
  86. math

    i need to divide and simplify 11y-44/25 divided by y-4/35y

    asked by linda
  87. Chemistry

    The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular weight for chlorophyll

    asked by Anonymous
  88. History

    During the Oka Crisis, the Mohawk later surrendered, but the plan for the town of oka to create the land into a golf course was cancelled. Did the Mohawks get to keep their land?

    asked by Vanessa
  89. work

    1. You are a member of Special Troop Battalion, 3d BCT, 10th Mountain Division. Your battalion will deploy to Iraq within six months. The battalion commander approved your unit’s METL. The METL identifies critical tasks for each platoon and now it is

    asked by Anonymous
  90. History

    Why was Nunavut created? I've done research but no sites tell me exactly why. Was it because the Inuits felt like they needed their own land... etc?

    asked by Vanessa
  91. Chemistry

    Consider a segment of water in the ocean that has a saturation solubility of 7.5 mg/L of O2. If there are algae in this body of water consuming CO2 at 1.0 mg/hr, how quickly will the water reach saturation if it starts at no O2 dissolved?

    asked by Anonymous
  92. chem

    im a bit confused on how and why surface tension and viscosity decrease with increasing temperature?

    asked by greeny
  93. government

    Courts issued court orders, or i-j--cti---, to make sure that people of color were allowed to vote.

    asked by tiffany
  94. math

    the area of a square is 8 square meters . what is the length of one side of the square? round to the nearest tenth if necessary.

    asked by jake
  95. US History and Constition

    1. Eli Whitney intended his cotton gin to help eliminate slave labor. Why did it increase it?

    asked by Alexus
  96. Math

    can you show me step by step how tot find the domain of a function like this h(x)=7x-2

    asked by chchch
  97. math

    show me step by step how to find the domain of this function then graph it g(x)=2x-4

    asked by chchch
  98. math

    find the area of a rectangle bounded by the axes and one of its corner is a point in the curve y=1/x.

    asked by patrick
  99. Medical

    Is it true medical assisting are licensed by each state?

    asked by Katherine
  100. Human Services

    program design component for Habitat for Humanity where can I find information about this?

    asked by Mary
  101. accounting

    Shopping Center A Square foot: 3,500 Distance: 4 miles Shopping Center B Square foot: 1,500 Distance: 5 miles Shopping Center C Square foot: 300 Distance: 3 miles Use the Huff Gravity model to find the probability that customers will shop at shopping

    asked by Anonymous
  102. Trigonometry

    1. ((cosx)/(1 + sinx))+((1 + sinx)/(cosx)) 2. ((cos(x)cot(x))/(1 - sin(x)))-1

    asked by Lindsay
  103. Math

    Solve x/a-y/b =0 ax+by = a*a + b * b

    asked by Mayank
  104. physical science

    a magnet connot be made by

    asked by ben
  105. Math

    Solve x/a-y/b =0 ax+by = a*a + b * b

    asked by Mayank
  106. English

    why wouldn't employees be paid or compensated for extensive overtime? Is the branch following eimployee contractual agreements and agency/branch policies? Is the Roanoke branch operating under different salary scales/schedules than others Phoenix offices?

    asked by Dee
  107. Math

    Solve: i) x/a - y/b = 0 ax + by = a^2 + b^2 ii) a/x - b/y = 0 ab^2/x + a^2 b /y = a^2 + b^2

    asked by Mayank
  108. organic

    2000gram ya 2kg caco3 me mole se atoms se molecuies atoms se proton atoms se neutron atoms se eiectron

    asked by rishi
  109. orgenic

    117 gram nacl se mole

    asked by rishi
  110. Math

    Solve: 3x + 7y + 5= 0 4x - 3y - 8 = 0 Find p; if: px + y - 1= 0

    asked by Mayank
  111. physics

    A block is initially sliding along a horizontal surface with 24.6 J of kinetic energy. Friction causes the block’s speed to be halved in a distance of 3.20 m. a) What is the kinetic energy of the block after traveling the 3.20 m? b) What is the magnitude

    asked by Katie
  112. Science

    What fraction of the original activity of a radioactive substance will remain at the end of half-life?

    asked by Nezz
  113. finite math

    A box contains 14 balls (10 red and 4 white). Three balls randomly drawn out of the box. Determine the following probabilities: P(three red balls)= P(two red and one white)= P(one red and two white balls)= P(three white balls)=

    asked by preet
  114. chemistry

    wh should the maximum percent yield never be above 100%

    asked by sysc
  115. English

    1. I failed the bar exam for which I studied day and night. 2. I failed the bar exam for what I studied day and night. (Which one is correct?)

    asked by rfvv
  116. Physica

    If the length of a wire is doubled and its cross – section area decreased to half ,the resistivity of the wire becomes the same ( put true or false) pleas drwls

    asked by axxxxxxxx
  117. Physics

    If you must stop your moving car in a hurry, should you slam on the brakes and lock them?

    asked by Ana