Questions Asked on
May 11, 2014

  1. chemistry

    Answer the following math questions focusing on significant figures a. 45.3L x 10 mol/L = b. 67.894 g ÷ 2.56 L = c. 45.3m + 12.344m + 1000m – 1.34m = d. 35cm + 8.3m + 75.341 km + 80,000 mm = e. (43.7m + 39.3cm) ÷ 25.332 m/s =

    asked by aira
  2. Physics

    Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet?

    asked by T
  3. Physics

    Sam, whose mass is 76kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15s . How far has Sam traveled when he

    asked by TP
  4. chemistry

    Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more

    asked by julie
  5. (2-8) Chemistry - Science (Dr. Bob222)

    Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal gas expands against a

    asked by Ana
  6. Physics

    A horizontal rope is tied to a 45.0kg box on frictionless ice. What is the tension in the rope if: A) The box is at rest? B) The box moves at a steady vx = 4.40m/s ? C) The box vx = 4.40m/s and ax = 4.60m/s2 ?

    asked by TlP
  7. Economics (36)

    For borrowers with good credit scores, the mean debt for revolving and installment accounts is $15,015 (BusinessWeek, March 20, 2006). Assume the standard deviation is $3,730 and that debt amounts are normally distributed. a. What is the probability that

    asked by Mia
  8. chemistry, first year university

    Solid NH4N3 decomposes explosively according to the following equation: NH4N3(s) ⇌ 2N2(g) + 2H2(g) A small amount of ammonium azide was placed in a sealed container and the air was removed. The sample was then detonated. At equilibrium the total pressure

    asked by julie
  9. Physics

    In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wall. A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of static friction between the ladder and the floor is 0.50. What is the

    asked by Kate
  10. math

    A) which is the better value a 12 ounce jar of honey for $2.25 or an 18 ounce jar of honey for $3.24? B) the supermarket displays the unit price for the 12 ounce jar in terms of cost per ounce, but displays the unit price for the 18 ounce jar in terms of

    asked by Kayla
  11. English

    Give an example of imagery from act 5 in Romeo and Juliet

    asked by Lloyd
  12. MATH

    A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?

    asked by Leah
  13. history 11th grade

    Amazon rain forest

    asked by anonymous
  14. physics

    24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.

    asked by Jatindra Deori
  15. Chemistry

    How can I determine the overall electrochemical reaction that proceeds spontaneously? Cd2+ | Cd, Co2+ | Co 1. Cd+Co2+ −¨Cd2++Co 2. Co+Cd2+ −¨Co2++Cd (1. and 2. are answer choices)

    asked by Sara
  16. math

    A architect is designing a house. The scale on the plan is 1 inch=6 feet. If the house is to have a length of 90 feet and a width of 30 feet, how long will the line representing the house's length on the blue print

    asked by Kayla
  17. Astronomy

    Imagine that you are an astronomer, and you are planning to do a survey to find new brown-dwarf stars. You need to calculate how sensitive your search needs to be (and hence how big a telescope you will need and how long the survey will take). You want to

    asked by qwerty
  18. Physics

    design a pair of ear defenders and explain how they work using big idea of energy transfer

    asked by Jean Smith
  19. chemistry

    Write equations for the ionisation in water of : A) hydrobromic acid B) nitrous acid C) carbonic acid D) sulfuric acid

    asked by Haiano
  20. english

    Im trying to learn this sensory imagery thing. Please check i think its B. Which sentence below best demonstrates sensory imagery? A.There were cameras flashing everywhere and the exicited voices of the helpers probably scared him even more. B.we drove

    asked by matt
  21. Art

    What is value? • the lightness or darkness of a color • the intensity of a color • the number of colors being used in a 2D artwork • the difference between two colors

    asked by Sandra
  22. Math

    Solve for 5 X 3 to the nth,. my answer is 15, 45, 135, 405

    asked by steve
  23. Social Studies

    Did the Marbury v. Madison case affect the power of the judicial branch by helping establish the Supreme Courts' power to check the power of the other branches of the government?

    asked by Peeps
  24. Math

    The function rule C= 10 n + 26 where n = number of people and c = cost of party. Show a table if 27,39 , & 43 people go. My answer is the following n 27 39 43 c 296 416 456

    asked by steve
  25. Astronomy

    Imagine that you have found an object out in space. When you use the inverse square law to compute its luminosity, you get a ridiculously large value. You therefore suspect that relativistic beaming is at work - the radiation is coming from a jet traveling

    asked by qwerty
  26. math

    If Tom buys a red skateboard, then Anne buys pink in-line skates." Which statement below is logically equivalent?

    asked by Jenny
  27. algebra

    θhe height h in feet of a car above the exit ramp of an amusement park′s free-fall ride can be modled by the equation h=−16t 6+s where t is the time in seconds after the car drops s is the starting height of the car in feet. How high above the car′s

    asked by Sue May
  28. Economics (42)

    Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings

    asked by Mia
  29. Math

    A spinner numbered 1-10 is spun. what is the probability of spinning a multiple of 3 and a multiple of 2?

    asked by Ben
  30. Math

    A Canadian zoo started with 16 whooping cranes and planned to hatch 20 chicks a year. A few birds were kept for breeding and the rest released into the wild. At the end of last year, a total of 136 cranes had spent some time in the zoo. If the pattern

    asked by Han
  31. Chemistry help

    I am not to sure how to approach the problem... Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic: N2H4(liquid) + O2(g) ==> N2(g) + 2H2O(liquid) ΔH(reaction) = -615 kJ mol-1 What is the enthalpy of this reaction

    asked by Anonymous
  32. Math

    A spherical balloon with a surface area of 36pi square inches is inflated further until its diameter has increased by 50%. The surface area of the balloon is now? I know the formula for surface area is A=4pi*r squared. I don't understand how you can figure

    asked by Gayle
  33. physics

    A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2 . Through the rest of that distance, its acceleration is – 0.750

    asked by Anonymous
  34. Physics

    A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?

    asked by Ali
  35. Aths

    Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to

    asked by Ali
  36. algebra

    The first angle of a triangle is 23° more than the 2nd angle. The 3rd angle of a triangle is 6 times the 2nd angle. Use X to represent the unknown value

    asked by brian
  37. Chemistry

    Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V Can you please explain the steps?

    asked by Sara
  38. Chemistry

    if you produce 5.7 of H2O, how many liters of O2 will be required?

    asked by sarah
  39. english

    English is the language of opportunity.why bother to teach indegenous languages

    asked by Anonymous

    the atmosphere pressure P in pounds per square inch (psi) is given by P=14.7e upper o.21a where a is the attitude above sea level in miles. If a city has an atmosphere pressure y 13.29 psi what is its altitude. Recall that one mile = 5,280 feet. Round to

    asked by gary

    t = - 6.25 In ( 1 N over 80) according to the formula what is the maximum number of word per minute. Round off to the nearest whole number. Solve N

    asked by gary
  42. math

    I have to find the area of a kite. I am only given part of the longest diagonal (12 cm) and half of the other diagonal (9 cm). I know the formula is diagonal 1 times diagonal 2 times 1/2. I have the length for one diagonal which is 18 cm b/c 9+9. How can

    asked by maya
  43. algebra

    An artifact was found and tested for its carbon-14 content. If 75% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.) thank you

    asked by gary
  44. algebra

    Write the equations in logarithmic form. 25=(1/5)^2 thanks for the help.

    asked by gary
  45. reading

    original concept of the american dream

    asked by yasminb
  46. personal finance

    Bryan earns $6.25 per hour plus 1.75% commission on all goods sold. One week he worked 37 hours and sold $6,500 worth of goods. What were his weekly earnings?

    asked by kevin
  47. Physics HELP!!!!!!!!

    Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?

    asked by suzan
  48. grammar

    Have you seen my sister Karla around here today? Have you seen my sister, Karla around here today? Have you seen my sister, Karla, around here today?

    asked by Anonymous
  49. chemistry

    how many significant figures do the following numbers have? a. 1.2056 x 10^4 m: b. 1 x 10^89 km: c. 12,000 L: d. 0.000345 cm: e. 1.00036 mL: f. 0.2056000 m:

    asked by aira
  50. Math

    Simplify 4sqrt6/sqrt30 by rationalizing the denominator

    asked by Math
  51. math

    Aplane is flying at an altitude of 12000m from the pilot the angle of depression tothe airport toweris32 degrees how far is the tower from a point directly beneath the plane

    asked by romain
  52. Chemistry Who step by step

    A 0.8870g sample of a mixture of nacl and nan03 is dissolved in water, and the solution is then treated with an excess of AGN03 to yield 1.913g of agcl. Calculate the percent by mass of the nacl in the mixture. 1.913g / 143 = 0.0133 x/58 ( 0.8870g -x) y/85

    asked by Ken
  53. Math

    Is the following sequence a arithmetic,geometric or neither? 1.6, .8, .4, .2 my answer is geometric

    asked by steve
  54. Math

    An artist is designing the rectangular wire structure with four rectangles drawn inside. The artist has a 12 meter length of wire. If the entire area of the figure is to be maximized, what should be the length of X? I know the formula for area of a

    asked by Gayle
  55. Social Studies

    Why was the united states interested in claiming the Oregon Country? Is it because they just wanted to expand their land even more?

    asked by Lux
  56. algebra

    The learning curves describes the rate at which a person learns certain tasks. If person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by a) according to this formula what is the maximum number

    asked by gary
  57. History

    What are the regional interests for Newfoundland, Prince Edward Island, Nova Scotia, New Brunswick.

    asked by Annadona
  58. math

    simplify: a)9x+9-1 b)10n-4n c)-8v+6(10+6v) d)7(9k+8)+3(k-10) a)x=? b)n=? c)v=? d)k=? (please help)

    asked by carlos
  59. Math

    Using the table below is it a linear function? x -2, -1, 0, 1, 2 y -7, 1, 8, 17, 25 my answer is that it is a linear function rule: x = -1 y = -8,-9,-7, -8 I think the rule is y= 8 X+8

    asked by steve
  60. Math

    If you have the following points for X and Y what is the linear function rule? x = 4, 1 y = 2, -4 I think it is 1/2 x but I'm not sure if it is +6 or - 6

    asked by steve
  61. Chemistry 104

    The pH of 0.3 HSO3- is: (How can this problem be solved?) The final answer is 4.41 However, I keep getting 3.76

    asked by Radha
  62. math

    Can u please make an equation for this? : the club members need 686 cm of denim for rag dolls. They need 438 cm of denim for bean bags. How much denim is needed in all?

    asked by lexi
  63. Algebra

    You are one of the finalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.

    asked by Anonymous
  64. math

    67=(3-6x)/4.13 (note:its a fraction) (please help)

    asked by carlos
  65. Math!!!

    Equation for - the crafts club made 102 wooden train cars. There are 6 cars to a set. How many sets were made?

    asked by Dianne G.
  66. Math!!!

    Jim bought 1520 g of beans. He used all the beans to make 16 bean bags. How many hrams of beans did he use for each bean bag? - equation format please!

    asked by Dianne G.
  67. Math

    Is y= -3 x squared +x a quadratic function?

    asked by steve
  68. Math

    Write a function rule for the following table. x 2 4 6 y 1 0 -1

    asked by steve
  69. chemistry

    Radioactive decay is a process that follows first-order kinetics. The half-life of 32P is 0.03920 years; how long (in minutes) would it take for the amount of 32P to decrease to 53.25% of its initial amount? I don't understand at all what to do here

    asked by sara
  70. math

    Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of trail mix should Mary buy to have enough trail mix without leftovers?

    asked by Randy
  71. life science

    Why do human don't contain Chlorophyll to make photosynthesis and They get Energy but they don't contain chloroplast like a Pallisade Mesophyll ??

    asked by vuyo ketelo
  72. Statistics

    A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number

    asked by Angelica
  73. chemistry

    Why is it recommended to carry out iodometric titration as quickly as positive and to get the first end point?

    asked by samanmali
  74. Astronomy

    Imagine that you are a particle physicist, and you have come up with a theory that some gamma-ray bursts come from the decay of a new and exotic sub-atomic particle that you think might exist. You calculated that if this particle really does exist and

    asked by qwerty
  75. math

    0.0357 x # = 357 x 2,# = 1. 200 2. 200,000 3. 2,000 4. 20,000 5. 7,140

    asked by peter
  76. math

    What is the value of the expression a / uv if a, u, and v are each doubled 1. multiplied by 2 2. multiplied by 3. divided by 2 4. divided by 4 5. left unchanged

    asked by peter
  77. Algebra

    Find the first and third quartiles of the data set. 1, 5, 1, 2.5, 3, 2, 3.5, 2, 3, 1.5, 4, 2, 4, 1, 3, 4.5

    asked by Anonymous
  78. History: World War 1

    Hi beautiful people. I am struggling to find a primary source to back up the oft cited claim that Germany was not allowed into the League of Nations. Given that the covenant itself contains no such proscriptions and I am not finding it in the Treaty of

    asked by Mizza
  79. Lifo Orientation

    Critically discuss six ways in which Xenophobia impacts on individuals, groups as well as on your community?

    asked by Asingisile
  80. social studies

    The mock wars which were held in Louisiana were directed by ______ and ______

    asked by kelsey
  81. Economic/ Accounting

    what are welfare payments or consumer subsidies

    asked by Anonymous
  82. history 11th grade

    perils of the amazon rain forest

    asked by anonymous
  83. math

    5x5+5x5+5-5x5=750 How are people getting 30?

    asked by bob the builder
  84. PHI 103

    This is not the best of all possible worlds, because the best of all possible worlds would not contain suffering, and this world contains much suffering

    asked by Mike
  85. Compensation Management

    which of the following statements is best descriptive of why many suggestion plans have failed

    asked by Rosa
  86. Algebra

    A bag contains 7 blue, 5 purple, 12 red and 6 orange marbles. Find the probability, if you draw one marble at random from the bag. Select the simplest form. P(not blue)

    asked by Prima
  87. Algebra

    You are one of the finalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.

    asked by Anonymous
  88. Math

    Solve the following 2a(a squared+4a)

    asked by steve
  89. English

    1. They made coins from gold and silver. 2. They made coins of gold and silver. 3. They made coins out of gold and silver. (Which ones are grammatical?)

    asked by rfvv
  90. 8th U.S History DBQ - Pls check my answer!!!

    Document 3 - In 1912, Washington Gladden, an influential white minister from Columbus, Ohio and Washington support asked Booker T. Washington to state his position on woman suffrage. Washington replied: I think you have expressed my own attitude very fully

    asked by Cassidy
  91. English

    1. I will opened the door. 2. The door will be opened by me. 3. The door shall be opened by me. (What is the passive form of Sentence 1?)

    asked by rfvv
  92. 8th History DBQ - Pls check my answer, thx!!!

    Document 7: W. E. B. Du Bois publicly embraced the cause of woman suffrage after he moved north in 1907. The signs of awakening womanhood in the world to-day are legion. The best novelists are women. Some of the keenest essayists and graceful writers of

    asked by Cassidy
  93. physical

    24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.

    asked by Jatindra Deori
  94. Calculus

    For the parabola y^2=4px, where p, the focal length, is a constant, the focal point, f(p,0), is on the x-axis. Point S is 10 units from the point F and the segment SF makes a 60degree angle with the x-axis. The slope of segment TF is twice the negative of

    asked by Anon
  95. chemistry

    A solution is made by dissolving 811.0 cg of barium hydroxide, Ba(OH)2, in 0.1137 kg of water. What is the concentration in parts per million? I know the equation is: ppm= (mass of solute/mass of solution)10^6 Does the mass need to be in g or kg?

    asked by erica
  96. Calc

    A patient receives a 3 ml dose of medicine. The amount, y, of medicine in the body decreases at a rate of 15% per hour (dy/dt=-.15y). When the medicine in the patient is down to 1 ml, the nurse administers a second 3 ml dose and plans to give the patient a

    asked by Anon
  97. chem

    The normal boiling point of Ta is 5425°C. What is its vapor pressure in mm Hg at 4384°C, if its heat of vaporization is 781.0 kJ/mol? Do I use the Clausius-clapeyron equation?

    asked by anonymous
  98. Math

    Canada ranks fifth in the world in the production of gold. By the end of one year, one of Canada's mines had produced about 198 t of gold since it opened. if the annual production averaged 4.5 t, predict the total production by the end of next year and the

    asked by Han
  99. American History

    What was the role of the northwest ordinance and what was its effect on the banning of slavery?

    asked by Me and I
  100. Science

    Hello :) For my assessment tomorrow, one of the things I have to think about is this: "Explained how the ear defenders will work using the Big Idea of Energy Transfer." I have no idea about this at all, please help!

    asked by meh
  101. Science

    How do I draw a particle diagram to show how ear defenders work?

    asked by Pooja
  102. Social Studies

    Briefly describe one way that these cultures changed the geography of the paces to which they migrated. 1. the ancient Romans who conquered much of Europe and England 2. homesteading families who migrated to the western territories of North America 3.

    asked by Anonymous
  103. social st

    Lower interest rates on certificates of deposit are associated with _______. higher account balances shorter maturities longer maturities a and b

    asked by tota
  104. chemistry

    What is the energy released when steam at 25 g of steam at 10 degree celcius is cooled to ice at-10 degree celcius work heat change for the following changes calculated 150 degree Celsius steam --150 degree water 150 degree water to 0 degree water 100

    asked by treasa
  105. math

    . The nominal interest rate on your account is 7%; your semi-annually effective rate of interest (APY) will be

    asked by tota