Questions Asked on
December 16, 2012

  1. Chemistry

    A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 751 torr. What is the volume of the hydrogen at STP (standard temperature and pressure)?

    asked by Kia
  2. physics

    the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

    asked by alyssa
  3. homeschool

    What are the products of the double-replacement reaction between potassium chloride and silver acetate?

    asked by Lucy
  4. math

    256 consumers polled, some like only thriller movies, some prefer just comedies, and some like both. If 78 people like only thrillers and 116 like both, how many people prefer only comedies? A62 B38 C140 D194 Is it 38?

    asked by Deborah
  5. chemistry

    When disaccharide beta is hydrolyzed, which monosaccharide units are produced?

    asked by Dee
  6. math Algebra 1

    What is the algebraic expression for the following word phrase: the product of 5 more than p and 7? A.5+p+7 B.7(p+5) C.7*p*5 D.p+5 over 7 I think it is A...?

    asked by Deborah
  7. AP calculus

    The base of a cone-shaped tank is a circle of radius 5 feet, and the vertex of the cone is 12 feet above the base. The tank is being filled at a rate of 3 cubic feet per minute. Find the rate of change of the depth of water in the tank when then depth is 7

    asked by Alannah
  8. Chemistry

    Given the reaction 2C2H6 + 7O2 → 4CO2 + 6H2O ∆H = -1416 kJ/mol C2H6 a. How many liters of Carbon Dioxide would be produced if 16.00 L of ethane, (C2H6), were burnt (all at STP)? b. How many liters of water vapor would also be produced? c. How many

    asked by Shenette
  9. Math

    I can't figure out this one question... A ship is docked in port and rises and falls with the waves. The function d(t) = 2sin(30t)°+5 models the depth of the propeller, d(t), in metres at t seconds. e) within the first 10 seconds, at what times is the

    asked by Crystal
  10. Math Algebra

    5. At the half-time show, a marching band marched in formation. The lead drummer started at a point with coordinates (–4, –7) and moved 4 steps up and 2 steps left. a. Write a rule to describe the translation. I think it is (x,y)-->(x+2,y+4)is this

    asked by Deborah
  11. Chemistry

    When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

    asked by Dee
  12. English- edit my essay please?

    The Great Gatsby Mortality is something we will all face at some point in our life. However, I doubt many people will deal with it in the same light as James Gatz did. He died once in his youth, at the age of seventeen, only to be reborn again as someone

    asked by Andrea
  13. physics

    a bolwing ball of mass 2.00 kg strikes a stationary pin of mass 5.00 x 10^2 g. the collision lasts for .60s after which the pin moves off with a velocity of 12.0 m/s [w] a)accel of pin during the collision b)force exerted by bowling ball on the pin c)the

    asked by feez
  14. investing

    Which of the following statements is true about financial planning? A. Any kind of financial expert (such as a stockbroker, lawyer, or accountant) can help you develop a comprehensive financial plan. B. Once you have painstakingly developed a financial

    asked by Anonymous
  15. statistics

    In a simple random sample of 50 plain M&M candies, it is found that none of them are blue. We want to use a 0.01 significance level to test the claim of Mars, Inc., that the proportion of M&M candies that are blue is equal to 0.10.

    asked by Anonymous
  16. English

    The following items are run-on sentences. Revise each item either by making two complete sentences, or by adding a conjunctive adverb or semicolon. Change the punctuation and capitalization as necessary. Make all corrections on the sentences below. I was

    asked by April
  17. Chemistry

    The total mass that can be lifted by a balloon is given by the difference between the mass of air displaced by the balloon and the mass of the gas inside the balloon. Consider a hot air balloon that approximates a sphere 5.00 m in diameter and contains air

    asked by Savannah
  18. Stats

    students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54. Treating this class as the population, what percent of students study more than 12 hours a week

    asked by Anonymous
  19. chemistry

    An aqueous solution is 0.273m kcl. What is the molar concentration of potassium chloride, kcl? The density of the solution is 1.011 x 1 1000 g/L Who helps me

    asked by Fai
  20. Math ave grade

    a student scores 76,82,83 on the first three test, she has a 92 homework averge. if the final exam is 50% of grade and homework is 10% and the test average (nit including the final) is 40% then what grade should she get on the final exam to get a 87.5 in

    asked by James
  21. maths

    A wall 24m long, 0.4m thick and 6m high is constructed with the bricks each of dimensions 25cm X 16cm X 10cm. If the mortar occupies 1/10th of the volume of the wall, then find the number of bricks used in constructing the wall.

    asked by dev
  22. chemistry

    When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

    asked by Dee
  23. math final review (help)

    from a 12cm by 12cm piece of cardboard, square corners are cut out so that the sides can be folded up to make a box. Express the volume of the box as a function of the length, x, in centimeters.

    asked by christina
  24. physics

    the initial velocity of a 4 kg box is 11 m/s, due west. after the box slides 4 m horizontally its speed is 1.5 m/s. determine the magnitude and the direction of the non conservative force acting on the box as it slides.

    asked by bryan
  25. maths --plse help me..

    Find the area of the sector of a circle of radius 7cm if the corresponding arc length is 6.2cm

    asked by hunny
  26. chemistry

    What's the equation written in a sentence for nh4no3(s)=n2o(g)+2h2o(g)

    asked by nelly
  27. Physics

    you weigh 120 lb at the sidewalk outside the world trade center. Suppose you ride from this level to the top of one of its 1350 ft tower. how much less would you weigh

    asked by Radhikha
  28. chemestry

    a 40g piece of ice at 0.0 degrees C is added to a sample of water at 8.0 degrees C. the ice melts and the temp of the water decreses to 0.0 degrees C. how many kilograms of water weere in the sample?

    asked by jessie
  29. english

    Combine the following sentences by changing the italicized group of words into a gerund or gerund phrase.I lost my wallet. This caused me great inconvenience.

    asked by Dontea
  30. Letter to Mrs.Sue

    Mrs. Sue I'm sorry for my behavior. I know you'll never forgive me but I'm sorry.

    asked by Gabby
  31. chemistry

    What is the type of glycosidic bond in case alpha?

    asked by Dee
  32. Math

    A rancher has 220 feet of fencing to enclose a rectangular corral. Find the dimensions of the rectangle that maximize the enclosed area, using all 220 feet of fencing. Then find the maximum area.

    asked by Carlee
  33. physics

    One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first. Assume both

    asked by Emily
  34. Mathematics

    The expression 1/3 log (a)-3 log(b) is equivalent to_________, i know the answer but i don't know how to get it.

    asked by Sim
  35. Math

    A map has a scale of 2cm=15km. If the distance between two cities on the map is 9cm, what is the actual distance between the cities?

    asked by Candi
  36. Physics

    The weight of an object on Earth is 350 newtons. On Mars, the same object would weigh 134 newtons. What is the acceleration due to gravity on the surface of Mars, given that it is 9.8 meters/second2 on Earth?

    asked by Plato
  37. statistics

    ) The personnel manager of a consumer products company asked a random sample of 300 employees how they felt about how they felt about going to a flex schedule, which would allow employees to choose their arrival and leaving times, on a five day schedule.

    asked by ree
  38. trig/precalc

    An airplane with a ground speed of 750 mph and a bearing of N 40 E encounters a wind of 50 mph with a bearing of S 30 E. Find the bearing and ground speed of the plane.

    asked by Mia
  39. environmental science

    why are cultivation practices for pest control not widely used today?

    asked by hannah
  40. Help Please!!Edu

    what does research show about the child's relationship with the primary parental figure when the child has additional attachments to other people?

    asked by Nick
  41. Programming in c++

    Write a program in c++ that inputs a number [1-12] from the user and displays the month. it also asks the user whether he wants to input another number or not, if the user inputs 1 then it again inputs number, if user inputs 0 then program ends.

    asked by osama qaiser
  42. math

    in triangle ABC, line BF is angle bisector of angle ABC, line AE, line BF and line CDare medians, and P is the centriod. find Xif DP = 4x-3 and CP=30

    asked by Can't
  43. Math Algebra

    The length of the hypotenuse of a right triangle is 30 m. The length of one leg is 20 cm. Find the length of the other leg. Round your answer to the nearest tenth I know how to do hypotenuse but this doesn't seem to work out...help please

    asked by Deborah
  44. physics

    A uniform beam of length 7.60 m and weight 4.30 102 N is carried by two workers, Sam and Joe, as shown in the figure below. (a) Determine the forces that each person exerts on the beam. F_Sam = ___ N F_Joe = ___ N

    asked by anonymous
  45. Intermediate Algebra

    Standing on a platform 60 feet high, a person accidentally fires a gun straight into the air. the formula h=-16t^2+100t+60 describes the bullet's height above the ground, h, in feet,t seconds after the gun is fired. how long will it take for the bullet to

    asked by Anonymous
  46. history

    To what extent is the following statement accuate? "During the 1960s, the United Sates had become a more open, more tolernt, freer country."

    asked by ashley
  47. physics

    The puck in the figure below has a mass of 0.160 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 60.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work

    asked by anonymous
  48. physics

    A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.4 m/s. Also, it has an acceleration in the direction parallel to the walls of 5.8 m/s^2 What will be its speed when it

    asked by Emily
  49. math

    An initial deposit of $5000 earns 5.5% annual interest compounded semiannually. How much will be in the account after 5 years?

    asked by emman
  50. math To MS.SUE

    Ms sue i really want a hundred percent on one algebra test im in algebra and im so smart and good at math but the thing is in my class we tooken 4 tests and on all of then i only got one wrong whit the most minor common mistake i don't understand just one

    asked by jj
  51. maths

    in the following fig two tangents PQ and PR are drawn to a circle with centre O from an external point P.prove that QPR=2OQR

    asked by senthil
  52. physics

    The gravitational field strength at the surface of a certain neutron star is 1.34*10^12 N/kg. What would be the theoretical maximum height of a cylindrical granite column which could support its own weight without crushing when exposed to a field of this

    asked by adebiyi
  53. Chemistry

    The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

    asked by Ankur
  54. Physics

    A index of certain type of glass has an an index of refraction of 1.66 for red light and 1.65 for violet light. If a beam of white in air approaches the glass with an angle of incidence of 49.0 degree, by what angle will the red light be separated from the

    asked by Hanu 2012
  55. math

    A random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 60% of the students plan to work, 30% of the students plan to continue in school, and 10% of the students

    asked by ed
  56. Physics

    A spaceship at rest in a certain reference frame S is given a speed increment of 0.50c. Relative to its new rest frame, it is then given a further 0.50c increment. This process is continued until its speed with respect to its original frame S exceeds

    asked by Brian
  57. Physics

    A football is thrown toward a receiver with an initial speed of 17.5 m/s at an angle of 35.2◦ above the horizontal. At that instant, the receiver is 16.7 m from the quarterback. The acceleration of gravity is 9.81 m/s^2 With what constant speed should

    asked by Emily
  58. SUPER SUPER SUPER NEED OF HELP

    Comment s'appelle l'argent qu'on utilise en Haiti? Que veut dire le mot? Pourquoi y a-t-il des fenêtres et des portails sur les billets européens? Regarde tous les pays don't l'argent est le franc. Qu'est-ce qu'ils ont en commun? Est-ce que le dollar

    asked by SUPER DUPER IMPORTANT!
  59. science

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 152.0 ppm and is initially uniform through the thickness of the

    asked by fatine
  60. Chemistry

    The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

    asked by Ankur
  61. Chemistry

    The fictitious compound, pandemonium fluoride (PnF2) has a Ksp value in water of 3.091×10−9M3 at room temperature. Calculate the solubility of PnF2 in water. Express your answer in units of molarity.

    asked by Ankur
  62. Math

    320 + 16x = x^2

    asked by Meg
  63. science

    (c) The kinetic energy of the emitted electrons is measured to be 15.2 eV. What is the first ionization energy of Hg in kJ/mol?

    asked by Samantha
  64. chemistry

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 176.0 ppm and is initially uniform through the thickness of the

    asked by cuie
  65. math

    you have a rectangular piece of cardboard 40X48 inches and need to create an open box with the maximum volume(ignore flaps). what would the dimensions of the box need to be to maximize the volume?

    asked by Carlee
  66. Chemistry

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 359.5 ppm and is initially uniform through the thickness of the

    asked by Please Help Me!!!!!!!!
  67. book report

    My teacher gave me a book review paper. What does it mean when it says "write an ending sentence for your review"

    asked by Celest
  68. chemistry

    The carbon concentration in the steel before carburization is 366.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of the carburizing furnace maintains a carbon concentration of 8040.0 ppm at the surface of the steel.

    asked by opppp
  69. French

    Écris un paragraph en français au passé composé. Écris au moins six phrases.

    asked by SUPER DUPER IMPORTANT!
  70. calculus

    answer the questions about the following function f(x)= 10x^2/x^4+25 a. is the point (-sqrt 5,1) on the graph b. if x=3, what is f(x)? what point is on the graph of f? c. if f(x)=1, what is x? what points are on the graph? d. what is the domain of f? e.

    asked by Help--Please help!!!!
  71. 5th grade math

    how many ways can you use a dime, quarter, and nickel to make .60 cents?

    asked by zack
  72. math

    the gift box fits 2 layers of 10 cubic inches. what is the volume of the box.

    asked by darren
  73. trignonmetry

    6. Prove that tan λ cos^2 λ + sin^2λ/sin λ = cos λ + sin λ 10. Prove that 1+tanθ/1-tanθ = sec^2θ+2tanθ/1-tan^2θ 17.Prove that sin^2w-cos^2w/tan w sin w + cos w tan w = cos w-cot w cos w 23. Find a counterexample to shows that the equation sec

    asked by yoshi
  74. History

    Why should king Charles 1 not have been guilty and/or executed?

    asked by Anonymous
  75. Ms.Sue

    Can you delete all my questions i have ever asked on here i want to start fresh thx!

    asked by Gabby
  76. Writing

    Read the passage below. It is a fictitious political speech by Peter, a candidate for the upcoming national election. Then answer the following questions: 1. List the arguments 2. List the non-arguments 3. List the facts 4. List the non-facts 5. What

    asked by Carm
  77. Conestoga

    predict whether a solid will form. Identify the solid and write the balanced equation for the reaction. Na2S(aq)Cu(NO3)2(aq)

    asked by anonymous
  78. history

    in the later pharses of the civil war general running for president

    asked by j
  79. Inorganic chemistry

    Balance by redox method: 1. S + HNO2 --> SO2 + NO + H2o 2. 24H +18 H2O + 8 MnO4 + 5 As4O6 --> 8 Mn2+ + 20 H3AsO4

    asked by pearlB.
  80. chemistry *Poorly defined commonly used question

    "Why are active on-duty firefighters likely to experience the adverse health effects from inhaling 300 ppm of carbon monoxide faster than nonactive off-duty firefighters who inhale the same concentration of the same substance? Explain your answer using the

    asked by Cameron
  81. chemistry

    Chemical analysis of a silicon crystal reveals gallium at a level of atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in

    asked by queiry
  82. Math

    A new queen size bed sheet measures 210cm by 240 cm. The lenght and width shrinks by 2 percent after the first wash a. What are the dimensions of the sheet after washing b. What is the percent decrease in the area of the sheet

    asked by Haylie
  83. Algebra

    Graph on a number line. 21/2. please help thank-you

    asked by Shay
  84. business

    1.21 Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business (M. W. Ford, D. W. Kent, and S. Devoto, “Learning from the Pros: Influence of Web-Based Expert Commentary on Vicarious

    asked by lou
  85. physics

    Maxwell's equations proved that a. Light is a mechanical phenomena b. Light is a chemical phenomena c. Light is a phenomenal phenomena d. Light is an electromagnetic phenomena I think the answer is either a or d. But I'm pretty sure its d Thank you for any

    asked by Katie
  86. Math

    Margaret feeds her dog about 300 grams of dog food with each meal. If she feeds her dog twice a day, about how many kilograms of food does she need to feed her dog for a week?

    asked by Candi
  87. literary

    What does my teacher mean by this? So I'm writing an essay on the great gatsby and I told my teacher about it via emai. (I'm doing online school) and this is what he told me... Also, make sure you develop the theme more than merely "mortality." I always

    asked by Andrea
  88. Chemistry help please

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 359.5 ppm and is initially uniform through the thickness of the

    asked by T
  89. help

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 478.5 ppm and is initially uniform through the thickness of the

    asked by Anonymous
  90. Math

    For a history project, Marcus built a replica of the Texas State Capitol building. His model has a scale factor of 1/100. If the height of the Capitol's dome is 310 feet, how high is the dome on Marcus' replica?

    asked by Chace
  91. physics

    A 1.13 × 103 kg car accelerates uniformly from rest to 10.6 m/s in 3.22 s. What is the work done on the car in this time interval? Answer in units of J

    asked by Brett
  92. Finance

    Hi Tech Products has 35,000 bonds outstanding that are currently quoted at 102.3. The bonds mature in 11 years and carry a 9 percent annual coupon. What is the firm's aftertax cost of debt if the applicable tax rate is 35 percent?

    asked by Anonymous
  93. Intermediate Algebra

    To find the distance across a canyon, a surveyor inserts poles at two places on the same side of the canyon as indicated below. using the surveyor's measurements given below, find the distance across the canyon. (the answer can be in simplified radical

    asked by Anonymous please help
  94. biology

    how do transport proteins that are pumps differ from those that are channels

    asked by anoymous
  95. final review help

    log2 64 and 2^x = 40

    asked by beth
  96. Zoology

    I want to know about the "Unio" in detail. Could anyone send me the links to it? Please do!

    asked by mollusca
  97. science

    What is the acceleration of a 66 kg block of cement when pulled sideways with a net force of 597 N? Answer in units of m/s 2.

    asked by bethany
  98. Fractional Exponent (Math-II)

    A mathematics teacher bought a birthday cake for his son with the dedication Happy Birthday!!! (2 raise to 5/2 .(the dot means times) 2 raise to 3/4 divided by 2 raise to 1/4)th How old is his son? kindly help me...

    asked by jezzaD.
  99. Intermediate Algebra

    The distance, d, in feet that an object falls in t seconds is modeled by the formula d=16t^2. if you dive from a height of 120 feet, how long will it take to hit the water?

    asked by Anonymous
  100. Algebra 2

    how would you translate the graph of y=-x2 to produce the graph of y=-(x+1)2?

    asked by Cassy
  101. algebra system of equations

    solve X^2 + Y^2 =70 Y= 2X + 5

    asked by luckybee
  102. Calculus

    Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't

    asked by Mackenzie
  103. 6th gradeLanguageArts

    Need help on this question. What happened last? The first time that Ethel tried downhill skiing, she sprained her ankle. The second time she tried; she broke a ski and nearly broke her leg. After that, she was frightened to try skiing again, but her sister

    asked by Brandi
  104. Math

    An architect designed a rectangular room with an area of 925 square feet. If A = 925 ft squared, what is the width of the room if the length is 37 feet? A. 25 ft B. 74 ft C. 425.5 ft D. 462.5 ft

    asked by Chace
  105. English - ms. sue

    ms. sue for essay i be writing i got everything done about real life traditions now i just need few more from story on this topic Wat expense be paid by beings & by society 4 their unhesitating approval of tradition or brutal social rituals. Do there be

    asked by Mohammad
  106. Physics

    A candle flame is placed in front of a concave mirror on the principal axis such that is twice the size of the object and is inverted. If the sum of the object distance and the image distance is 72 cm, how far from the mirror is the image and what is the

    asked by Hanu 2012
  107. English - Ms. Sue help

    Help on this question I don't understand Answer the following question about the poem “Fable for When There’s No Way Out.” How does this line from the poem help explain the outcome of the chick’s struggle? “Rage works if reason won’t.”

    asked by antboy
  108. Intermediate Algebra

    A fire is raging in an apartment house. you see kids in a window in an upstairs window. the window is 24 feet off the ground. you have a ladder, but it only extends to 30 feet, how far from the house must you place the ladder to reach the kids?

    asked by Anonymous
  109. math need help

    study time in X hours 8 5 7 12 10 test grade Y in percent 68 50 62 92 80 a)model the date in a linear function b)interpret the meaning of the slope

    asked by aaron
  110. statistics

    The accompanying multiple regression outputs estimate the following model: annual cost = 0 + 1(Type of School) + 2(Average Total SAT) where: annual cost = annual cost at a college in thousands of dollars Average Total SAT = average scholastic

    asked by ree
  111. algebra

    Determine which of the flowing points lie on the line given by the equation 3x+6y=12

    asked by Melissa
  112. Economics

    - Explain how the federal government uses Fiscal Policy to avoid problems in the economy. - Historically, where has the Federal government spent the most money?

    asked by Abby
  113. physics

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.72 kg m-3. Under these conditions the total surface area of the balloon is 0.17 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by Anonymous
  114. maths

    Show that the equation of a line 4x-3y 4

    asked by Minte
  115. maths

    Show that the equation of a line 4x-3y 4

    asked by Minte
  116. maths

    Show that the equation of a line 4x - 3y 4

    asked by Minte
  117. Calculus

    Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't

    asked by Mackenzie
  118. Fractional Exponent (Math-II)

    A mathematics teacher bought a birthday cake for his son with the dedication Happy (2 raise to 5/2 .(the dot means times) 2 raise to 3/4 divided by 2 raise to 1/4) Birthday!!! How old is his son? kindly help me...

    asked by jezzaD.
  119. Chemistry

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.3 kg m-3. Under these conditions the total surface area of the balloon is 0.33 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by Please Help Me!!!!!!!!
  120. Science

    what gases are in the troposphere?

    asked by Anonymous
  121. chemistry

    Show that a conventional x-ray generator is incapable of generating x-rays of wavelength as low as 10-11m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such x-rays

    asked by meshy
  122. chemistry

    The diffusion coefficient of silver (Ag) in copper (Cu) has the following values: T (K) D (m2s-1) 923 5.42 x 10-16 1173 1.34 x 10-13 (a) Calculate the activation energy for diffusion of silver in copper. Express your answer in units of J/mol

    asked by meshy
  123. chemistry

    6.85ml of 0.015M SN2+

    asked by Fai
  124. chemistry

    You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can

    asked by meshy
  125. chemistry

    The half-life of a first order reaction is determined to be 60.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?

    asked by queiry
  126. physics

    The gravitational field strength at the surface of a certain neutron star is 1.34*10^12 N/kg. What would be the theoretical maximum height of a cylindrical granite column which could support its own weight without crushing when exposed to a field of this

    asked by adebiyi
  127. Religion

    Who is God?

    asked by God
  128. algebra

    Write a rule for the pattern. -3,-9,-14,-47,-141,.....

    asked by Shay
  129. language arts

    Need help on another question. Which sentence is written correctly? A) “The hissing cockroach,” my teacher said. Comes from Madagascar. B) “The hissing cockroach,” my teacher said, “comes from Madagascar.” C) “The hissing cockroach, my

    asked by Brandi
  130. English

    1..Today the Pink Palace Museum (has, is having, had, will have) a science center too. 1.has

    asked by Hayden
  131. Physics

    An electronic motor is revolving at 2000rpm. After 3sec, it is moving at 150rpm. Determine the angular acceleration. What is angular momentum of the electric motor if the rotational inertia is 18.kg.square meter in initial velocity? In final velocity? What

    asked by Bob
  132. pre cal

    f(x)= x^2(x+4) ( x^2-1), the zeroes & the multiplying of each. B. where the graph crosses or touches the x-axis/, c. number of turning points., d. end behavior.

    asked by phylllys
  133. History

    Imagine you have been asked to defend charles 1 at his trial. Why should king charles 1 not have been found guilty and/or executed. You have to try to prove that Charles was not a tyrant or a traitor.what is the most important/ dangerous charge, and what

    asked by Anonymous
  134. Politics

    How does the presidential agenda affect congress

    asked by Reggie
  135. science

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.23 kg m-3. Under these conditions the total surface area of the balloon is 0.46 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by fatine
  136. Chemistry

    A ___________ means that 2 or more substances have combined, yet the 2 substances retain their chemical identity?

    asked by Jessica
  137. Chemistry

    A ___________ means that 2 or more substances have combined, yet the 2 substances retain their chemical identity?

    asked by Jessica
  138. Math

    Carlos sells video games on a web site. the cost for his web site is $75 per year. Carlos sells each video game for $25. Which equation can Carlos use to determine how many video games "g", he must sell to make a profit of $50 per year? A. 100g = 50 B. 75g

    asked by Candi
  139. Physics

    The tension in a rope attached to a boat is 27.5 lb. The rope is attached to the boat 6.0 ft below the level at which the boat is being drawn in. At the point where there is 18.0 ft of rope out, what force is bringing the boat towards the dock, and what

    asked by jordy_mccready
  140. statistics

    Then, for the following two examples, determine the null and alternative as well as state which one represents the claim. State what type of test will be completed: left-tailed, right-tailed, or two-tailed. The average score of the first exam for the class

    asked by lashawn
  141. math using rule 78

    a loan for $400 is to be paid off in 66 months witha payment of $11.62 The borrowee pays it off in 18 months use rule 78 to find the interest saved

    asked by sasha
  142. science

    what are the altitude ranges of the troposphere, stratosphere, mesosphere, and the thermosphere?

    asked by Anonymous
  143. ALG 2 PLZ PLZ HELP

    As you can see, the biker and his friend are having a hard time getting up the hill. They would like to get to the top safely. Two ordered pairs on the hill are given as (6, 3) and (8, 7). Part 1: Find the slope of the hill. Slope (m) = change in y over

    asked by tyneisha
  144. English

    What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?

    asked by john
  145. math

    I family of ducks contains 7 ducks which are 44 lbs. The other wieghs 32 lbs (no amount of ducks given) How much does each duck and duckling weigh in each group THEY HAVE TO WEIGH THE SAmE IN EACH GROUP

    asked by Olivia
  146. Social Studies - URGENT

    Using the five themes of geography, which theme best illustrates each statement: Location, character of place, human-environment interation, movement or region. 1. Islam spread to Eastern Europe from Southwest Asia 2. The Scandinavian countries share

    asked by M
  147. maths

    which is valuable abacus or vedic maths?

    asked by Anamika
  148. maths --plse help me..

    Is eulers formulae true for spheres and cylinder ,please explain

    asked by sumit
  149. calculus

    A 6 m3 box with a perfect triangle base and lid and 3 rectangular walls is to be constructed from 2 materials. The cost to make the base 1$/ft2 and that for the lid and walls is 4/2 $/ft2. What dimensions will result in the most cost-effective

    asked by Alex
  150. Math 12th grade

    Find the sum of each infinite series, or state that the sum doesn'nt exist 1/7+5/14+25/28+

    asked by Todd
  151. Adv. Physical Science

    an automobile to be transported by ship is raised above the dock by a crane. If the gravitational potential energy of the car is 6.6 x 10^4 and the mass is 960 kg how high has the car been lifted?

    asked by Rio
  152. Intermediate Algebra

    For the quadratic equation y=(x-3)^2-2. Determine: A) whether the graph opens up or down; B) the y-intercept; C)the x-intercepts; D) the points of the vertex. and D) graph the equation with at lease 10 pairs of points.

    asked by Anonymous
  153. calculus

    *find the slope of y= 4/x +6 at the point (8,2) *evaluate the derivative at the point (pi,4) y=[tan(5x^8)]^3 please help

    asked by alia
  154. Calculus

    Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't

    asked by Mackenzie
  155. Honor'sMath/UsingSimilarFigures

    Help! I cannot figure out how to do this and my teacher does not explain things very well! The question is- An image is 16 in. You want to make a copy that is similar. Its longer side will be 38 in. The copy costs $.60 per square inch, Estimate the copy's

    asked by Lizzy
  156. Applied Behavioral

    About what percentage wo women experience hot flashes during menopause 1. 5% 2. 50% 3. 90% 4. 99% My answer is 50%

    asked by Regina
  157. math

    Please explain to me. A green sea turtle weights 355.3 kilograms. Which decimal is equivalent to this number? A. 3,550.3 B. 350.30 C. 355.03 D. 350.003

    asked by Loren
  158. scenice- Rock

    It says write a story about a rock. Where it came from? How it got into my yard? What wearthering and erosion affected the rock

    asked by Funke
  159. american history

    in 1700 which of the following colonies had the largest slave population relative to its overall population

    asked by kim
  160. Chemistry

    I'm currently learning about balancing chemical equation but I don't understand the equation below. 2FE + 3CL(subscript 2) -> 2FECL(subscript 3) I understand 2FE balance out but how did 3CL2 became CL3? Thanks

    asked by Shadow
  161. Phamacology

    A patient is prescribed digoxin. The patient’s apical heart rate is 58 beats per minute. What is the nurse’s best action?

    asked by John
  162. Politics

    How does bureaucracy effect foregn policy?

    asked by Reggie
  163. phi103

    A sentence is said to be truth-functional if and only if (Points : 1)

    asked by Anonymous
  164. algebra help

    2 5 3 ---+---=-- x^2 x-3 x+3

    asked by beth
  165. help..reflective journal

    write a 300 words reflective journal expressing the view on class activities and the own personal comments.

    asked by anne
  166. college algebra

    Given the following quadratic equation, find a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function.

    asked by LISSETT
  167. Algebra

    How do I write 7t+7/-6 divided by 4t+4/15 in lowest terms ?

    asked by James
  168. Calc and Physics

    Damon and Reiny. Thanks for your quick and thorough responses.

    asked by Daryl
  169. Intermediate Algebra

    For the quadratic equation y=(x-3)^2-2. Determine: A) whether the graph opens up or down; B) the y-intercept; C)the x-intercepts; D) the points of the vertex. and D) graph the equation with at lease 10 pairs of points.

    asked by Anonymous
  170. statistics

    The tires are also tested for failure during a road test where they are subjected to road hazards. A test of 600 tires resulted in the failure of 30 tires. a) Find a 95% confidence interval on the proportion of failures for the new formula of of rubber. b)

    asked by ree
  171. Intermediate Algebra

    For the functions below, solve for f(g(h(-1))). f(x)=(x-1)^2 g(x)=2x^2+3x-1 h(x)=(x+3)

    asked by Anonymous
  172. english

    the chimney sweeper poem the children were very badly treated by masters who only cared about money. discuss the methods you would use to protest

    asked by may
  173. Math

    Move 3 sticks to form a figure which is made up of 5 rectangles and 3 squares.

    asked by Anders
  174. calculus-can someone please help me with this ques

    find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 please show work

    asked by confused--Please help!!!!
  175. Intermediate Algebra

    For the functions below, solve for f(g(h(-1))). f(x)=(x-1)^2 g(x)=2x^2+3x-1 h(x)=(x+3)

    asked by Anonymous please help
  176. Physics

    A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.0 m/s. After 0.25 s, the ball is moving toward the paddle with a speed of 3.0 m/s. What is the average acceleration of the ball

    asked by Ann
  177. Math

    Move 3 sticks to form a figure which is made up of 5 rectangles and 3 squares.

    asked by Anders
  178. Algebra

    The first element of a geometric sequence is 1 and the common ratio is 3; determine the smallest 4 digit numeral that represents an element of this geometric sequence

    asked by xavier
  179. physics

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.72 kg m-3. Under these conditions the total surface area of the balloon is 0.17 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by Anonymous
  180. final review help

    find: f(x+h)-f(x)/ h when: f(x)=x^2+5x

    asked by aaron
  181. physics

    5 kg of some liquid at 10 Celsius is mixed with 1 kg of the same liquid at 40 Celsius. What is the final equilibrium temperature? Ignore any heat flow with the containers and/or surroundings.

    asked by rachel
  182. chemistry

    A 1.252g sample containing iron is dissolved and converted to FE 2+ followed by addition of 25ml of 0.01M k2 cr2 07. The excess K2cr207 required 6.85 ml of 0.015M. Find the percentage FE304 FW 231g/mol in the sample. The right 7.96% Who helps me

    asked by Fai
  183. physics

    Determine the net force needed to cause a 1310kg sports car to accelerate from 0 - 28.6m/s[fwd] in 5.6 s

    asked by dabby
  184. Science

    A car went from a stop position to 50 km/hr in 5 seconds. What is the accelleration?

    asked by Freddy
  185. chemistry

    Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.

    asked by cutie
  186. chemistry

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.66 kg m-3. Under these conditions the total surface area of the balloon is 0.88 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by meshy
  187. vector prob, please help explain.

    can someone help me please or explain this better? i'm having trouble. thank you, chelsea Three ropes hold a zeppelin in place, but two of the ropes break. The remaining rope holds the zeppelin with a tension of 255 N at an angle of 40 degrees with the

    asked by chelseavanderguard
  188. chemistry

    Identify the feature below using correct crystallographic notation.

    asked by meshy
  189. calculus

    find derivative y= 3x^5-6x^3/7secx find dy/dx * xcosy= 5( y+cosx) * X^5-Y^3+8XY=466 * A RIGHT TRIANGLE HAS LEGS OF LENGTH 15M AND 7M. THE 7M LEG IS NOT CHANGING. 15M LEG IS GETTING LONGER AT RATE OF 8M PER SECOND. SO WHAT IS RATE OF CHANGE OF THE

    asked by aisha
  190. chemistry

    The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10-400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV,

    asked by meshy
  191. Science

    is there weather in the tropopause?

    asked by Anonymous
  192. chemistry

    How could one lower the glass transition temperature of a germate (GeO2) glass? Select all possible ways. Increase the cooling rate.Decrease the cooling rate.Add SiO2 to the glass melt.Add CaO to the glass melt.

    asked by queiry
  193. chemistry

    A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms? Update: Express your answer in Celsius.

    asked by queiry
  194. chemistry

    The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants:

    asked by queiry
  195. English - Ms. Sue

    So in my grammar book it is these explanation: We use the with nationality adjectives that end -ese, -ch, -sh, -ss and are used to refer to all the people of that nationality, eg. Chinese, Japanese, Spanish. The French drink a lot of wine. The Swiss are

    asked by Minnie
  196. math

    The lethal inhalation dose of Sarin for a 200lb person has been determined to be 0.0015 mg. Determine the LD50 of Sarin that researchers used to calculate this lethal inhalation dose. 1.4 x 10-4 mg/kg 0.16 x 10-4 mg/kg 1.8 x 10-5 mg/kg

    asked by Cameron
  197. trigonometry

    If you know the sine of a number, how do you find its cosine?

    asked by rachel
  198. English

    1..The Pink Palace's wall (was, were) built with pink marble. 1.was

    asked by Hayden
  199. Strayer university

    Suppose that the Fed's inflation target is 2%, potential output growth is 3.5%, and velocity is a function of how much the interest rate differs from 5%: %^V= 0.5 X (i-5). Suppose that a model of the economy suggests that the real interest rate is

    asked by Joanne
  200. physics

    A block of weight 11 N is placed on a frictionless incline which makes an angle of 240 with the horizontal. Find the acceleration of the block as it slides down the incline.

    asked by Anonymous
  201. algebra

    solve t^2 + 3 = 6t using quadratic formula

    asked by Pearl
  202. Math

    0.1y^2 + 0.6y^2 - 0.3y^2 =

    asked by tootles
  203. Chemistry

    What is the name (NOT THE NUMBER) of the group whose elements carry a neutral charge?

    asked by Jessica
  204. MGMT

    5. Which kind of goal concerns cooperation between departments?

    asked by Jill
  205. Government

    Local citizens participate in lawmaking?

    asked by Anonymous
  206. math

    34-9-80/4+7

    asked by esha
  207. social studies

    can you see if i have good grammar,usage, mechanics and spelling Job description: use various types of equipment, develop, secure, and packages. Physical evidence for scientific evaluation and comparison, prepares detailed reports on the observation and

    asked by naomi
  208. Religion

    The Gospel of John uses High Christology in its account of Jesus’ life. First, define High Christology. Then, describe 2 ways that John depicts Jesus using High Christology and give examples for each from the gospel.

    asked by John
  209. chemistry

    A buffering agent is very similar to a buffering solution. true or false true

    asked by Anonymous
  210. chemistry

    If we have a concentration of H+ at 1 x 10-1.2 mol/L, what is the pH value? A. -1.2 B. 0 C. 2.4 D. 1.2 A.

    asked by Anonymous
  211. Ms.Sue

    Thx Ms. Sue I got 100% on everything :) thanks to you.

    asked by Gabby
  212. Cultural Anthropology 101

    Theocracies are: (Points : 1) 9A)****determined by the religious beliefs of the society. based on the accumulation of wealth by individuals. a group of elected officials. are sanctioned by Big Men. 2. Chiefs within chiefdoms generally gained their

    asked by mandy
  213. Chemistry

    A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.3 kg m-3. Under these conditions the total surface area of the balloon is 0.33 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

    asked by T
  214. vector

    Three ropes hold a zeppelin in place, but two of the ropes break. The remaining rope holds the zeppelin with a tension of 255 N at an angle of 40 degrees with the ground due to a wind. The weight (vertical force) of the zeppelin and its contents is 200 N,

    asked by chelseavanderguard
  215. Chemistry

    standard form of the equation KClo3->KCl(5)+02(g) for a project

    asked by Jeremiah thomas
  216. chemistry

    Calculate [\rm H_3O^+] given [\rm OH^-] in each of the following aqueous solutions. [\rm OH^-] = 7.1×10^11M What calculations do I make from this point? I have plugged in the 7.1×10^11M into the calculator but am getting the answer wrong every time and

    asked by jennifer andersen
  217. trigonometry

    5.Find the complete exact solution of sin x = -√3/2. 10. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 12. Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 19.Prove that tan^2a – 1

    asked by Jose
  218. Grammar

    I couldn’t help but to think: “Is this really what the meaning of success has become?” and to make matters even worse, this idea was just spread to the thousands of viewers. Is this correct?

    asked by Michael
  219. calculus

    Determine the largest rectangle that can be inscribed inside the cavities of the two curves: y = –2(x – 6)2 & y = 6x2 –12*Tx – 128 + 6*T2

    asked by Alex
  220. maths

    The value of (₆√27-√27/4)^2 is:

    asked by arjun
  221. Math HELP PLEASE

    solve and express your answer in coordinate x,y,z x+y+z=6 2x-y-z=-3 x-2y+3z=6

    asked by cori
  222. Science

    Imagine you are an energy expert on a planning council for a new town to be built on an island. Evaluate resources and methods you will suggest the new town to use.

    asked by Aaliyah
  223. math

    a total of $784was collected for tickets.is 300 a reasonable estimate for the no. of tickets sold? explain.

    asked by esha
  224. math

    price is not given

    asked by esha
  225. Intermediate Algebra

    using the distance formula, calculate the distance to one decimal place between the points (-3,5)and (4,1).

    asked by Anonymous