Questions Asked on
April 4, 2011

  1. algebra 2

    the loudness L of a sound in decibels is given L=10log10R, where R is the sound's relative intensity. if the intensity of a certain sound is tripled, by how many decibels does the sound increase? due tomorrow, tuesday, april 5th, 2011. help pleaseeeee ;)

    asked by math challenged
  2. chemistry

    Consider the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K. a) 7.3 b) 0.34 c) 0.040 d) 0.14 e) none of these the answer for

    asked by raf
  3. Physics 203 ( College)

    Four particles, one at each of the four corners of a square with 2.5-m-long edges, are connected by mass less rods. The masses of the particles are m1 = m3 = 2.0 kg and m2 = m4 = 7.0 kg. Find the moment of inertia of the system about the z axis.

    asked by Kayla
  4. math !!!! :O

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

    asked by Katherine
  5. algebra

    brad wants to buy flowers for his friend with $21. The daises are $2 each and the roses are $3 dollars each.He buys 3 more daisies then roses. how much did the roses cost?

    asked by please please help!
  6. math

    If the radius of this cylinder is doubled, its volume will be twice as much four times as much eight times as much is it four times as much?

    asked by danny
  7. math

    mike wants to make a meatloaf his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork how much pork will he use?

    asked by please please help!
  8. Describe how you would make 250 mL of 0.500 M HCI

    Describe how you would make 250 mL of 0.500 M HCI from 12.1 M HCI. Show calculations.

    asked by Anonymous
  9. Chemistry

    HC2H3O2 + NaOH --> NaC2H3O2 + H2O? a. when the titration is only half over, what species are present in the reaction flask b. what can be said about the pH at this point when the titration is half over? c. what is the pH at the equivalence point of this

    asked by Anonymous
  10. algebra

    What is th remainder when the sum of the first 102 counting numbers is divided by 5220?

    asked by Mike
  11. Math

    Postal regulations specify that a package sent by priority mail may have a combined length and girth of no more than 129 in. Find the dimensions of a cylindrical package with the greatest volume that may be sent by priority mail. Hint: The length plus the

    asked by Amber
  12. Geometry

    The wheel of an adult's bicycle has diameter 26 in. The wheel of a child's bicycle has diameter 18 in. To the nearest inch, how much farther does the larger bicycle wheel travel in one revolution than the smaller bicycle wheel?

    asked by Tommy
  13. calculus

    In a certain region, the number of bushels of corn per acre, B, is given by the function B(n)=-0.1n^2 + 10n, where n represents the number of seeds, in thousands, planted per acre. If corn sells for $3/bushel and cost $2 for 1000 seeds, find the optimal

    asked by Nick
  14. Calculus

    If an open box has a square base and a volume of 106 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction. (Round your answers to two decimal places.) height in length

    asked by Josh
  15. geometry

    The area of a circle is 28.26 square centimeters. What is its diameter (use 3.14 for ð)?

    asked by Anonymous
  16. Chemistry

    Given the reaction A(g) + B(g) 2AB(g) 1. What does equilibrium mean? -equal mols or pressure between reactants and products? Is there more reactants or products? 2. Will the equilibrium be the same if i started with the reactants only vs if i started with

    asked by BlahxD
  17. math

    i am a relflex angle. all the digits in my angle measure are even. all of my digits are different. all three of my digits are factors of 8. my tens digit is greater than my one digit. what is my measure?

    asked by janet
  18. Math

    A circular garden has an area of 25π m2 If the . radius is increased by two meters, and fencing is sold only in one meter sections, how much fencing is needed to keep out the rabbits

    asked by Katie
  19. Algebra

    what is the solution to the system containing the equation ? x + y = -8 and -3x + 2y = 9

    asked by anonymous
  20. Algebra II-Please help!!

    Please help-I'm really mixed up How do I find the permutations of the first 12 letters taken 3 at a time? I have a ton of these to do and really don't understand them at all-

    asked by Anna
  21. Chemistry

    How do these react? Some may have no reaction. a. aqueous chromium(III) nitrate plus magnesium metal b. aqueous lithium sulfate plus aqueous barium chloride c. solid lead metal plus aqueous potassium chloride d. aqueous lithium fluoride with aqueous

    asked by Blaire
  22. Maths

    Hi Please can you help? Really sorry for repeating the question but I wrote it incorrect before. Find the particular solution of the differential equation from dy/dx=2/27(x-3)ã(x^2-6x+23) / (y) (y>0. for which y = 2 when x = 1, and then give this

    asked by Claire
  23. math

    use the numbers 1,2,3,4,5,6,7,8 and 9 one time make a true math equation :xxx + xxx = xxx. ex 237+654=891. Over 300 solutions with 32 different sums.

    asked by steve
  24. Calculus

    "Using Lagrange multipliers, find the maximum value of f(x,y) = x + 3y + 5z subject to the constraint x^2 + y^2 + z^2 = 1." Any help would be appreciated!

    asked by Anonymous

    hydrogen reacts with nitrogen to produce ammonia. 3H2(g)+ N2(g) = 2NH3(g) Determine how much ammonia would be produced if 100g of hydrogen reacts?

    asked by Anonymous
  26. elapsed time

    start 11:38a.m. elapsed time 3hr 10 min what is the end time?

    asked by Michelle
  27. CHEM

    HOW DO I Calculate the pKa of each acid. C2O4H2, Ka = 5.9 10-2

    asked by dada78
  28. chemistry

    Assuming a temperature of 37 C and 1 atm pressure, how many mol/min of CO2 is this?

    asked by sarah
  29. Math

    Write 0.09 x 10^12 in scientific notation.

    asked by Anonymous
  30. Math

    An ant weighs about 2 x 10^-5 lb. There are about10^15 ants on earth. How many pounds of an ants are on earth?

    asked by Anonymous
  31. geometry

    The width of a rectangle is 6 feet, and the diagonal is 10 feet. What is the area of the rectangle?

    asked by Anonymous
  32. philosophy

    State the moral issue involved, and provide an explanation as to why you think a relativist might have problem giving a justified response to it

    asked by tiffany
  33. Math


    asked by Chris
  34. math

    The freshman class is building a float for homecoming.One side of the float has a shape of a parallelogram with base of 12' and height of 6'. To complete the float the class must buy tissue to cover the side. It takes 3 boxes of tissue to cover each foot.

    asked by corey
  35. math

    There are 50 apple trees in an orchard, and each tree produces an average of 200 apples each year. For each additional tree planted within the orchard, the average number of apples produced drops by 5. What is the optimal number of trees to plant in the

    asked by tye
  36. physics

    The picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection plates. Suppose an electron beam is accelerated through a 53.8-kV potential difference and then through a region of uniform magnetic field

    asked by joe
  37. chemistry

    Balance the following equation: K2CrO4+Na2SO3+HCl>>>>>>Na2SO4+CrCl3+H2O Enter the coefficients for eachcompound, separated by commas, in the order in which they appear inthe equation (e.g., 1,2,3,4,5,6,7

    asked by roshan
  38. algebra 2

    find an equation of a circle satisfying the given conditions. Center(0,0), containing (-3,4)

    asked by Anonymous
  39. chemistry

    Calculate the molar solubility of Cu(OH)2, Ksp = 2.2 × 10–20, in 0.52 M NH3. Don't forget to use the complexation reaction Cu2+ + 4 NH3 ⇌ Cu(NH3)42+, K = 5.0 × 1013 What does he mean by the complexation reaction??? So confused, please help!!!

    asked by Erin
  40. Psychology

    Andy, a high school sophomore, lacks self-discipline, fails to plan ahead, and is excessively anxious. He is quickly frustrated by challenging tasks and frequently becomes overly critical of others. Use the psychoanalytic, humanistic, and socialcognitive

    asked by Brent
  41. chemistry

    what mass of (NH4)SO4 is required to prepare 500 cm3 of M/4 solution?

    asked by sarah
  42. Psychology

    Hello, I need to do a report on can a child under the age of 6 form criminal intent? I need to prove developmentally and all that why that child can't under age of 6 I am having problems finding websites to go to for research thanks

    asked by elija
  43. science

    what is the entire pysical universe

    asked by jannette
  44. Modern History

    Hi I need help finding where this cartoon was originally published Its the LEV HAAS (Czech,1901-1983 "Do not trust him! The kulak is the most hardened enemy of socialism") one. Sorry I couldn't post the link. Thanks!

    asked by Sasha
  45. Islam in India...Economic effects?

    What economic effects did Islam have in India? I'm having a tough time finding any info for an ESP (Economy, Society, Politics) chart in my book. Any info is welcome and thanked :)

    asked by Kate
  46. science

    if u have a negative vector component do u leave it as it is or do u minus into 180 degrees to make it positive? E.g -89.0i + 228.5j

    asked by g
  47. chemistry

    A 1.2431 -g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated

    asked by tara
  48. chemistry

    24ml of .05 mol per litre of SILVRE NITRATE reacts with 15 ml of potassium chloride.calculate molar concentration of potassium chloride.

    asked by kalsoom
  49. Calculus

    "Using Lagrange multipliers, find the minimum value of f(x,y) = x^2 + y subject to the constraint x^2 - y^2 = 1." Any help would be appreciated!

    asked by Anonymous
  50. math

    The number 1 is a perfect square (1X1=1) and a perfect cube (1X1X1=1). What is the next smallest whole number which is both a perfect square and a perfect cube?

    asked by johnny
  51. geometry

    what is the base of a parellelogram if the height is 2inches and the area is 26 square inches

    asked by tiyanna
  52. Physics

    Two 75.0-kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 140 degrees, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of

    asked by Aestas
  53. Physics 203 ( College)

    A disk of radius 12 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 7.8 rad/s2. What are the following values at t = 4.0 s? (a) the angular velocity of the disk (b) the tangential acceleration at and the

    asked by Kayla
  54. accounting

    Santa Fe Company purchased merchandise for resale from Mesa COmpany with an invoice price of $24,000 and credit terms of 3/10,n/60. The merchandise had cost Mesa $16,000. Santa Fe paid within the discount period. Prepare entries that Santa Fe Company

    asked by ash
  55. punctuation spelling and Capitalization Mistakes.

    i the punctuation correct i did as much as i could When you proofread look for punctuation spelling and capitalization mistakes.

    asked by yelena
  56. Spanish 6 th grade-Please check

    I have three questions-Which sentence is written correctly? Es un buen clase. Es un buena clase. Es un buena clase. I think it is Es un buen clase. Is that correct? Second question- The term pelota refers to any kind of sports ball. Pelota is a ball but

    asked by Shelby
  57. HHS

    What is the molality of a solution in which 15g of I2 is dissolved in 500g of alcohol?

    asked by jaz
  58. Group Behavior in Organization

    Is group cohesiveness important? How do group cohesive forces affect group processes? What can you do to increase cohesiveness in your group?

    asked by Anonymous
  59. Chemistry

    Consider 125 mL of 0.110 M MgCl2 solution. a. How many moles of MgCl2 are contained in 125 mL of 0.0110 M MgCl2? b. What is the concentration of Mg2+ ion? c. What is the concentration of Cl- ion?

    asked by B
  60. Education

    How is an ELL's level of language proficiency determined? How do you modify your assessments to evaluate ELLs understanding of content?

    asked by Ray
  61. Soanish-6th grade-Another question-Please check an

    I have another question. If I have to use the word tener to express she is hot-I would say -Ella tiene calor, correct?

    asked by Shelby
  62. Com155

    Could you please help me locate the adjectives and adverbs in the below paragraph? ”Blending state of the art animation with live action, Hop is a comedy about E.B., the teenage son of the Easter Bunny. On the eve of taking over the family business, E.B.

    asked by Ben
  63. geometry

    If the arc on a particular circle has an arc length of 14 inches, and the circumference of the circle is 84 inches, what is the angle measure of the arc?

    asked by Anonymous
  64. math

    2 non congruent parallelo shapes

    asked by kasia

    In its financial statements, Trio uses straight-line depreciation with the half-year convention. The book value of the equipment at December 31, 2006, will be: a $29,000. b $35,000. c $31,000. d Some other amount.

    asked by Anonymous
  66. physics

    Find the shear strain that results if a force of magnitude 9.00×105 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to the bottom face of the plate as shown . Note

    asked by Linda
  67. geometry

    The area of a parallelogram MNOP is 48 sq cm. MX, which is a line segment perpendicular to diagonal PN where X is on PN, is 3 cm. How to find the length of diagonal NP?

    asked by emily
  68. English 102

    Can some one read this and give some feedback please! Introduction Is same-sex marriage going to create issues on our society? Same-sex marriages will most likely to have issue in many political campaigns also churches and Christians everywhere will be

    asked by Jennifer
  69. philosophy

    Our text discusses the challenge relativism presents to various ethical and religious viewpoints. Consider a specific moral question which might make it difficult to accept the relativist's response. State the moral issue involved, and provide an

    asked by tiffany
  70. Calculus

    An isosceles triangle is to have a perimeter of 64cm. Determine the side lengths of the triangle if the area is to be maximum. I need help setting this question up! Please

    asked by Taylor
  71. math

    the perimeter of a rectangle is twice the sum of its length and its width. the perimeter is 40 meters and its lenth is 2 meters more then twice its width. what is the length?

    asked by help fast please!!!
  72. Le Musee d'Orsay

    Need information on this museum please.

    asked by Nisa
  73. Math

    (4.3 x 10^3)(2 x 10^-8)

    asked by Nick
  74. Education

    How do you modify a lesson to teach ELLs?

    asked by Ray
  75. math

    In a storm, a plane flew against the wind and took 9 hours to cover 3,600 miles. The return trip, traveling with the wind, took 1 hour less. find the air speed of the plane, and the speed of the wind.

    asked by zack
  76. government

    __________ is the term given to the activities of interest groups that seek to influence the making and implementation of public policy and to persuade government officials to support a group's position.

    asked by cody
  77. Education

    Compare and contrast the teaching of comprehension strategies to ELL students and to native English speakers.

    asked by Ray
  78. Math

    Whole Number Math Riddle Clue 1: Double my tens digit and get my ones digit. Clue 2: Double me and I am less than 50

    asked by Savannah
  79. Chemistry

    What is the freezing point of a solution of 1.17g of 1-naphthol, C10H8O, dissolved in 2.00ml of benzene at 20 degrees C? The density of benzene at 20 degrees C is 876g/ml. Kf for benzene is 5.12 degrees C/m, and benzene's normal freezing point is 5.53

    asked by Jake
  80. Math

    In a local dog show, there are prizes for first, second, and third place. If there are 18 dogs competing, how many ways are there to award the prizes (assuming no dog can win two prizes)?

    asked by Tracy
  81. Math

    John bought 2 pounds of chocolate for $7.50. Write expression to find the cost of 3.5 pounds of chocolate?

    asked by Haley
  82. physics

    A new type of spring is found where the spring force F is given by F=-kx + bx^2 where k=400 N/ m and b=100 N/m^2 and x is the expansion (or compression) of the spring from its equilibrium position. The spring is attached to a point mass of 1 kg sitting on

    asked by Physics
  83. Calculus

    Find the area of the region enclosed by the inner loop of the curve. r = 5 + 10sin(θ) Any help would be greatly appreciated!!!

    asked by Julie
  84. history

    when and how does Germany unite? What are the causes and consequences of the rebellions 1837-36 upper and lower canada? What are the causes of movement and the liberal movement National Europe in the first Motie nineteenth sciècle

    asked by Cassandra
  85. Math

    I am trying to help my son figure out this question. during an art class at your school, you and a class mate each won blue ribbons for 1/3 of the pieces you entered in to the contest. you won 2 blue ribbons and your classmate won 3. explain how this could

    asked by Jamie
  86. chemistry

    How many grams of Na2CO3 are required to Na2S2O3

    asked by Rickia
  87. chemistry

    How many grams of Na2CO3 are required to Na2S2O3

    asked by Rickia
  88. math

    how is the speed determined of a falling object? what is the pull of gravity feet per second.

    asked by deek
  89. math

    Place any of the four operations signs (addition, subtraction, multiplication, or division)in the boxes to make the following sentence true. 1___2___3___4=6

    asked by johnny
  90. statistics

    Is it ever inappropriate to report the mean? If so, when?

    asked by tina
  91. vocabulary

    select the best synonym of the word satiate. a)empty b)fill c)deny d)deprive............please help.

    asked by Amie
  92. math

    the perimeter of a rectangle is twice the sum of its length and its width. the perimeter is 40 meters and its lenth is 2 meters more then twice its width. what is the length?

    asked by help fast please!!! help help help
  93. American History / Social Studies

    The age of discovery to the american experiment? A.Practical Scientific Experimentation B.philosophies of religion C.moral values life

    asked by Brook
  94. Walmart and Superstore

    These two companies are related to one another, and on the site ADVFN . Com I tried searching the stock symbol for superstore, but I cant find financial information on it. I found financial information for Wal-Mart. Could you please help me to find data

    asked by Anonymous
  95. Chemistry

    An atom it ground state contains 18 electrons. How many of these electrons are in orbitals with l=0? a.4 b.2 c.8 d.6

    asked by Jordan


    asked by STACEY
  97. grammar

    The five sample paragraphs are below. choose two at random to read. Note that the paragraphs represent a range of quality. some have errors and do not flow effectively. Avoiding and managing debt is hard. Things cost so much money that it's hard not to

    asked by Anonymous


    asked by STACEY
  99. reading

    A paragraph with this words a lot,because tonight,write,,opposite,scenery,again, questionnaire,excellence,and pennant

    asked by Anonymous
  100. math

    9/10x5/6x8/9 =? would that be 6/8 ? also the temperature ranged from -37 F to 103 F How many degrees was the temperature for the year? would you just take the difference between the two?

    asked by jill
  101. Chemistry

    Consider the following reaction: H2+I22HI A reaction mixture at equilibrium at 175 K contains P(H2)=0.958 atm, P(I2)=0.877 atm, and P(HI)=0.020 atm. A second reaction mixture, also at 175 K, contains P(H2)=P(I2)=0.616 atm, and P(HI)=0.106 atm. What will

    asked by Brooke
  102. puzzled for english

    solve these riddle for ur next clue the early bird catches the worm beaty blank nature take blank to the heart these need to make sense

    asked by cat
  103. Math

    explain what the values of m and b in your equation tell about the relationship between number of containers to be recycled and attendance at the school event

    asked by Megan
  104. Eth

    Hello Imagine yourself as a current member of your selected group, and consider the following question

    asked by Jeanetta
  105. physics-reciprocal conversions Curie and Becquerel

    Why so many sources give different values for reciprocal conversions Curie and Becquerel? 1 Ci = 3.7 x 10^10 Bq or 37,000,000,000 1 Bq = 2.7 x 10^-11 Ci or 0.000000000027

    asked by Anonymous
  106. English

    I still have a few parts I'm unsure of. I really hope you can help me. It's urgent, especially the last paragraph n.7 1)In the second stanza, the soldiers succeed in putting on their clumsy gas masks. Someone, however, is still crying out for help, unable

    asked by Mike
  107. Math

    Barney works part- time 30 hours a week at the cinema and earns $6 per hour. If he savea 1/3 of his paycheck each week how much does he have left to speed after 4 weeks?

    asked by PlzHelp
  108. pharmacy tech

    Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.

    asked by rob
  109. math

    -Three cards are drawn from a standard deck of cards without replacement. what is the probability that all three cards will be clubs f. 3/4 g. 11/850 h. 1/3 i. 36/153 please help....!!!!!

    asked by Emmalie
  110. science

    Write a letter to persuade a friend that a change in temperature does not necessarily mean that a chemical change has occured.

    asked by Anna
  111. Chemistry

    When an element reacts with a compound to produce another element and new compound, the reaction is called?

    asked by Cassandra

    A sample of gas in a balloon has an initial temperature of 28 and a volume of 1360 . If the temperature changes to 86, and there is no change of pressure or amount of gas, what is the new volume, , of the gas? Express the volume numerically in liters.

    asked by Anonymous
  113. Business

    what type of financial structure would you say the veterans hospitals and clinics run on?

    asked by april
  114. geometry

    An airplane over the pacific sights an atoll at 8 degree angle of depression. If the plane is 520hm above water, how many kilometers is it from a point 520 m directly above the center of the atoll? Help please :]

    asked by christina
  115. Education

    Describe the difference between word-level skill and text-level skill attainment for ELL students. Then, describe specific things teachers can do to increase ELL students' text-level skills.

    asked by Ray
  116. pharmacy tech

    Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.

    asked by rob
  117. math

    1.13s-s=_ 2.d+2d+d=_

    asked by lidia
  118. Math


    asked by Rachel
  119. english

    do you consider this a thesis statement? Autism,this topic intrest me because autism appears during the first three years of life.Autism causes several disoders and also is four more times prevalent in boys than girls

    asked by Camilya
  120. grade 5 math

    what is 11 7th as a mixed number please i need help and its due tomorrow

    asked by katlin
  121. Physics (PLEASE HELP!)

    Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

    asked by Allison
  122. chemistry

    Calculate the mass of silver nitrate needed to prepare a solution of concentration 0.01 moles per litre

    asked by Anonymous
  123. chem

    Calculate the volume of 0.200 M acetic acid and the volume of 0.100 M sodium acetate required to make 200.0 mL of a buffer solution with pH = 5.00. The Ka for acetic acid at 298 K is 2.00 x 10-5.

    asked by chem
  124. algebra 2

    how to find equation of horizontal tangent line of 2y^3+6x^2y-12x^2+6y=1

    asked by Anonymous
  125. math

    what is 7 1/2 plus 3 9/12

    asked by faythe
  126. math

    Select a variable (mean, proportion, variance or standard deviation) of interest to you and collect data consisting of at least 30 values. Define the variable. Define the population. Describe how the sample was selected. Use Microsoft Excel (and MegaStat

    asked by tom
  127. Physics

    A 1440-kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant of the spring

    asked by Kristen
  128. chm

    determing concentration by spectroscopy lab discussion?

    asked by iqra
  129. jobs

    does anyone know any where that is hiring in akron ohio, i need a jon and i cant seem to find the one to get me started? can anyone help me? thanks!

    asked by bobbi
  130. Social Studies

    After the Treaty of Paris, how long were the spanish in charge of Florida?

    asked by Hailee
  131. math please help me

    Select a variable (mean, proportion, variance or standard deviation) of interest to you and collect data consisting of at least 30 values. Define the variable. Define the population. Describe how the sample was selected. Use Microsoft Excel (and MegaStat

    asked by ibrahim
  132. physics

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0 L bucket in 1.20 min. (a) What is the speed of the water leaving the end of the hose? (b) A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter

    asked by Anonymous
  133. Physics

    A. Suppose you had an object that you suspected had a mass of one half of one of the washer+paperclip units. (In the rest of this problem we’ll call that a “washerclip.”) Describe how you could use the balance you used in tutorial and a single

    asked by Annie
  134. geography

    what would happen if wheat was no longer a resource to the U.S.?

    asked by jay
  135. Physics

    To what voltages must we accelerate electrons (as in an electron microscope, for example) if we wish to resolve; a) a virus of diameter 12 nm , b) an atom of 0.12 nm, c) a proton of diameter 1.2 fm?

    asked by Abby
  136. physics

    A longitudinal wave spreads radially from a source with power 345 W. What is the intensity 40.0 meters away? answer in W/m^2.

    asked by sabeen
  137. Chemistry

    why the acidic medium is used for determination of the amount if iorn in a sample of soil using standard KMnO4

    asked by DILANI
  138. statistics


    asked by Anonymous
  139. Physics

    Here’s how two different students approached part A. Elizabeth: Since the little brother is half as heavy as her sister, he must sit twice as far from the pivot in order to “compensate” for his lower weight—6 feet instead of 3 feet. Jill: I used

    asked by Annie
  140. Chemistry

    Which of the following substances will oxidize Sn(s) to Sn^2+? a) Cu(s) b) Cl2(g) c)Cl-(g) d) Mg(s) e) Cu^2+(aq) f) Mg^2+(aq)

    asked by Lauren
  141. physics

    The football is kicked over the goalpost with an initial velocity of vA=32 m/s as shown. Determine the point B (x,y) where it strikes the bleachers. type this question to google to find the figure. please and thank you.

    asked by .
  142. bio

    Supercoiling of DNA can occur (choose all that apply): A. when double stranded DNA is overwound B. when double stranded DNA is underwound C. when double stranded DNA is heated above it's Tm D. when DNA is treated with nucleases and Generally, cellular DNA

    asked by Yoo
  143. advanced math

    sin(-15) tan(165)

    asked by t54
  144. science

    a commuter plane starts from an airport and takes the route whereby it starts to city,located 175km away in a directiin 30egrees north of east of east. Next, it flies for 150 km 20degrees west of north,to city b.finally, the plane flies 190kmdue west,to

    asked by g
  145. English

    I still have a few doubts on the use of the present after "as if" and on other statements. Thank you for your cooperation. 1) They are hobbling along on their bloody feet, as if they are (why not were?) hurt or blind. They are so tired, they walk ask if

    asked by Mike
  146. Chemistry

    which is more concentrated a 1 liter solution containing 30 g of NaCl or a 1 liter solution containing 30g of KCl

    asked by Raul
  147. math

    Select a variable (mean, proportion, variance or standard deviation) of interest to you and collect data consisting of at least 30 values. Define the variable. Define the population. Describe how the sample was selected. Use Microsoft Excel (and MegaStat

    asked by ibrahim
  148. physics

    what is the weight of a square whose thickness is 10mm

    asked by john
  149. math

    jimmy swam for 5 more min than tim. write an expression showing the number of min tim swam. let m represent the number of min.

    asked by madsion
  150. trig maths

    rewrite 7 sin2A – 5 sin A + cos2A = o to solve for A

    asked by inno
  151. HELP!!!! math

    Find the measures of the interior angles of the pentagon below. A- 90 degrees B- x + 40 degrees C- x degrees D- x + 40 degrees E- x+ 50 degrees

    asked by Anonymous
  152. Health

    What does it mean if you have brown caking around your belly button, even if you follow basic hygenic practices.

    asked by Sasha
  153. physics 211

    A deep-sea fisherman struggles to bring in a big salmon (see figure below). Find the force each hand must exert on the pole if the tension in the line is 159 N. Neglect the weight of the pole and assume that the force exerted by the left hand is directed

    asked by Laura
  154. Algebra

    Sorry Iposted that previous question wrong. Here is the right question. What is the remainder when the sum of the first 102 counting numbers is divided by 5250.

    asked by Mike
  155. chemistry

    A student determined the chloride content of a commercial salt by using the Mohr method. A 0.5324 -g sample of the salt was dissolved in distilled water and diluted to a final volume of 250. mL. A 25.-mL aliquot of the analyte solution was then titrated

    asked by tara
  156. English

    What does this quote mean "what affects one directly affects all indirectly" by Martin Luther King Jr.

    asked by Anonymous
  157. literature

    I read Soldier Home by Ernest Hemingway and found two reasons to prove that it is important from 1865 to present time and they world war views and also show soldier's life after war. I need one more reason to support and will anyone tell what points are

    asked by iqra
  158. Algebra

    What is the positive difference in the sum of the letters in the words MATH and COUNTS, if each letter is assigned a value as follows: A=1, B=-2, C=3, D=-4,..., Y=25, Z=-26?

    asked by Matt
  159. FIN

    Phoenix, Inc made a coupon payment yesterday on its 6.25% bonds that mature in 11.5 years. If the required return on these bonds is 9.2% nominal annual, what should be the market price of these bonds?

    asked by willie
  160. grammar..

    which sentences need commas ... a) the dessert had a fluffly cream topping b) the fish was served with a rich tangy sauce c) my first job was happy rewarding experience d) Mr.Hawkins has a large collection of rare valuuable coins e) the leader of the rock

    asked by Anonymous
  161. ordering decimals

    how do we fit a decimal in each pair 0.6 0.7

    asked by mom
  162. chemistry

    24ml of .05 mol per litre of SILVRE NITRATE reacts with 15 ml of potassium chloride.calculate molar concentration of potassium chloride.

    asked by Anonymous
  163. ordering decimals

    how do we fit a decimal between this pair 0.6____0.7

    asked by mom
  164. social studies

    Ads that rely on the testimonials of people who have used the product are using what technique?

    asked by Paul
  165. English

    Thank you very much. I hope you can have a look at these few sentences too. 1)*Interior monologue is often confused with the stream of consciousness, although they are quite different. 2)Actually, the former is the verbal expression of a psychic

    asked by Mike
  166. chemistry

    With respect to Boyle's law (lab experiment with textbooks on an apparatus), if in the classroom the air pressure in the classroom is equal to 2.4 textbooks, how does one find the total pressure of a book with the volume of 26? Am I on the right track by

    asked by Rosie829
  167. statistics

    For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3

    asked by amanda
  168. Statistics

    For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

    asked by amanda
  169. Calc

    Suppose f(x,y) = A - (x^2 + Bx + y^2 +Cy). What values of A, B, and C give f(x,y) a local maximum value of 15 at the point (-2,1)? Any help would be appreciated!

    asked by Brittany
  170. area, perimeter

    the perimeter of rectangle y is equal to its area. rectangle z has the same perimeter as rectangle y. the length of rectangle z is 5 inches and the width is 3 inches. explain how you can find the length and eidth of rectangle y.

    asked by susie
  171. Math

    what is the math rule if u put in 1 and get 15, put in 2 and get 13, put in 3 and get 11, put in 4 and get 9, and put in 5 and get 7

    asked by Kenyen
  172. English

    Do you necessarily need references for a resume?

    asked by Jennifer
  173. Calculus

    "The quantity, q, of a product manufactured depends on the number of workers, W, and the amount of capital invested, K, and is given by q = 6 * W^(3/4) * K^(1/4) Labor costs are $10 per worker and capital costs are $20 per unit, and the budget is $2000.

    asked by Anonymous

    If 15g of Sodium Hydroxide are treated with sulphuric acid to produce sodium sulphate, how many grams of sulphuric acid are required. write the balance equation for this reaction and calculate the quantity of sulphuric acid.

    asked by Anonymous
  175. English

    I really need to have a look at the first stanza of Owen's poem as I'm unsure of tense choice. Thank you. 1) In the first stanza the soldiers are retreating towards their trenches. Instead of being youthful, strong fighters, they are presented as

    asked by Mike
  176. ordering decimals

    Ms.Sue could you please show us another exmple i understood 0.6 0.65 0.7 how about with a double digit number like: 0.25_____0.15 or 0.425_____0.475

    asked by mom

    What is the difference between the atomic weight, and its atomic number?

    asked by Anonymous

    carbon monoxide can be prepared by the reaction of steam with methane. CH4(g) + H2O(g) = CO(g) + 3H2(g) If 10g of methane is allowed to react with 10g of steam which of the reactants would be described as limiting. What is the theoretical yield of carbon

    asked by Anonymous
  179. science

    An abiotic factor that starts with c and the clue is soil type. So what is a soil type that starts with C?

    asked by Zac
  180. vocabulary

    can u give me a sentence with the words indifferent & heartily?

    asked by aileen
  181. Civics

    Did the American revolution undermined support for property qualifications for voting?

    asked by tee
  182. Physics

    When a golf club strikes a golf ball, the club is in contact with the ball for about .0016 s. The 45-g ball acquires a speed of 71 m/s. a) What is the magnitude of the impulse applied to the ball? b) Estimate the magnitude of the average force exerted by

    asked by Aestas
  183. chem

    how do you Convert moles S2O3^-2 to moles I2

    asked by tara
  184. math

    4 8ths Equvalent Fraction. . . . . . . . .!

    asked by Math.!!:B
  185. algebra

    LCM of 14, 40, and 36

    asked by Kimberly
  186. US history

    why can the Gadsden purchase be referred to as "conscience money"??

    asked by Bobbi
  187. mah

    Use pennies, nickles, dimes, and quarters. Make a combination that is worth one dollar where you have one of some kind of coin, double of another, double that of another, and some number of the last coin.

    asked by Anonymous
  188. chem

    how do I caluclate (H3O+) in a solution if the PH is the following 1.81

    asked by dada78
  189. math

    what is 80+80

    asked by nada
  190. MATH

    I am trying to figure out how to work this problem and need help. Q How many 2X6 pieces of 16 ft x 5 1/2 ins. for a porch that measures 16ft x 14ft? I changed the mixed number to an improper fraction (11/2) and found the area (224). 11/2 x 224/1

    asked by Caroline
  191. Chemistry

    What is the total pressure of a mixture of gases made up of CO2, O2 and H2 if the partial pressures are 22.3 kPa, 44.7 kPa and 112 kPa respectively?

    asked by Anonymous
  192. Math

    Angles 1 and 2 shown on the back of the envelope are congruent.What is the measure,in degrees of

    asked by Anonymous
  193. Calculus

    Evaluate the following integrals {e˄x+e˄-x/ e˄x dx

    asked by Zukii
  194. Geometry

    A line parallel to one side of a triangle divides one of the other sides into segments of lengths 15 and 9 and divides the third side so that the longest portion is 36. How long is the shorter portion of the third side?

    asked by Kareem
  195. Chemistry

    A solution is prepared with 50.0g of HNO3 and 130.0g of H2O. It has a density of 1.21g/mL. What is the total volume (mL) of the solution?

    asked by Sara
  196. english

    entertainment is a barrier to accademic work

    asked by damola
  197. Chemistry

    How do I convert moles to figure out chemical equations?

    asked by Eric
  198. math

    A person hired a firm to build a CB radio tower. The firm charges $100 for labor for the first 10 feet. After that, the cost of the labor for each succeeding 10 feet is $25 more than the preceding 10 feet. That is, the next 10 feet will cost $125, the next

    asked by lisa
  199. Sociology

    My question that I would like to know from the experts, is did I answer the questions below correctly? 1=C, 2=C and 3=D 1)Which sociological perspective holds the view that people create their social worlds through interaction and manipulation of symbols?

    asked by Sharon
  200. vocabulary

    which word is not an example of blending? a)housewife b)brunch c)telethon d)electrocute

    asked by Amie
  201. Calc,

    Find the value of the definite integral: int= integral sign int((x + 2)/(x^(3/2)),x= 16..25)dx I have no idea how to start this... would I get rid of the fraction?

    asked by CMM
  202. Chemistry

    If a 25.0 mL sample of 0.500 M HCl solution were diluted 125-fold, what would be the volume and concentration of the diluted solution?

    asked by Chris
  203. math

    Input:4 and 6 Output:12 and 17 What's the rule

    asked by Jake
  204. physics

    hi thank you for your help: i have a question that deals with finding the direction and magnitude of the net magnetic force on a loop that is next to a wire (the loop is in the wire's magnetic field) how do i set up a question like this? do i have to

    asked by kiksy
  205. elapsed time

    elapsed time is 2hr 37min, end time is 10:52P.M., what is the start time?

    asked by Michelle
  206. math

    If an electrician works for $750.00 per hour. What would be his salary for 2 days?

    asked by micheal
  207. vocabulary

    the latin base CORD- means: a)hand b)eye c)heart d)head thank you so much for helping.

    asked by Amie
  208. bio

    Supercoiling of DNA can occur (choose all that apply): A. when double stranded DNA is overwound B. when double stranded DNA is underwound C. when double stranded DNA is heated above it's Tm D. when DNA is treated with nucleases and Generally, cellular DNA

    asked by Yoo
  209. chemistry

    Explain how you would prepare the following dilute solutions from the more concentrated ones: a. 200ml of .500M HCL from a 6.00M HCL solution.

    asked by cameron
  210. Stats

    identify what is the 95 percent confidence interval for upper class respondents, give you have known their mean=15.34, standard deviation=3.48,and cases=38

    asked by Nancy
  211. Diff EQ

    Find all critical points of the given system and investigate the stability of each. dx/dt = y - 1 dy/dt = x^2 - y

    asked by Alex
  212. algebra

    A motorvoat goes 36 miles upstream on a river whose current is running at 3 miles per hour. The trip up and back takes 5 hours. What is the speed of the boat ( assuming that it maintains a constant speed relative to the water)?

    asked by jjj
  213. English

    I Need Help In English? First off, I'd like to introduce myself. My name is Anta and I'm currently a Senior and have to do this online course to graduate and I am basically left with no choice but to teach myself. The lesson I'm on now has been quite a

    asked by Anta
  214. precalculus

    For the Function, y= x(x-4)(x+8) Y-intercept is: X-intercept is:

    asked by katrina
  215. Physics

    If you throw a rock as far as you can from the ground level of a building, and from the top level of a building, will it go further horizontally when thrown from the higher level or from the ground level?

    asked by Cheryl
  216. trig

    2 cosine squared pi over 8 minus 1 find exact value of given expression

    asked by Lauren

    Can someone explain how to do this problem pleeeeasseeee. i need help .:/ . 3x – 11 = 10 – 4x THANKS SO MUCH!

    asked by Clueless.
  218. biology

    A gene for flower color can have multiple alleles like purple, white, or red. True ot false?

    asked by Anonymous
  219. HCS 320

    I am supposed to outline how to integrate communication from a central command area to all areas of the organization. The organization is FEMA. I am completely lost and I just need some help on how to get started. For instance what would be the central

    asked by Ashley
  220. algebra

    vote count for canidiate a is 7310. vote count for b was 14190. ther is only 2 candidates what percent voted for a?

    asked by please please help!
  221. Group Behavior in Organizations

    What is the importance of group member's perceptions about leadership and why is the phenomenon important as it pretains to group outcomes?

    asked by Anonymous
  222. Group Behavior in Organizations

    How does social influence/interaction affect decision making?

    asked by Anonymous
  223. Group Behavior in Organizations

    Why is it said that research about groups is not always valid and relevant?

    asked by Anonymous
  224. Group Behavior in Organizations

    Are group or individuals more effective in work environment?

    asked by Anonymous
  225. ordering decimals

    I do not understand how to find out what number come's between 0.425 and 0.475 would it be $ 4.25- $4.75

    asked by mom
  226. Chemistry

    Write a net ionic equation and calculate K for the reaction in aq between acidic acid and sodium hydroxide. Given Ka (acidic acid) = 1.8 x 10^-5

    asked by Paul
  227. physics

    how fast will a object be traveling when drppped from 30 feet high

    asked by albert
  228. physics

    A straight ladder is leaning against the wall of a house. The ladder has rails 4.50 m long, joined by rungs 0.470 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 0.780 m to the left of where it should be, and the

    asked by Bob
  229. Algebra 1

    Can you show the steps and explain how to solve 8-(x-2)

    asked by Dillon
  230. Computer programming

    Submit pseudocode for the following programming exercise: Fat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: - Make sure the number of fat grams and calories are not less

    asked by Viper
  231. Chemistry

    A sample gas has a volume of 200 cm^3 at 25 degrees celsius and 700 mmHg. If the pressure is reduced to 280 mmHg, what volume would the gas occupy at the same temperature?

    asked by B
  232. math

    identify what is the 90 percent confidence interval for occupational prestige for respondents with only a bachelor's degree (N=750), given you have known their mean=52.74, standard deviation=12.67.

    asked by Nancy
  233. Calculus

    evaluate the following integral e˄x+ e˄-x/ e˄x-e˄-x dx

    asked by anonomous
  234. math

    Need to write ratio 3 different ways. 1. 6 pencils to 4 erasers ANSWER= 6/4, 6 to 4, 6:4 Need to write an equivalent ratio for each. 1. 9/36 ANSWER= 1/4, 9 to 36, 9:36

    asked by Ann
  235. 6th grade Spanish

    I have two questions-Which sentence is written correctly? Es un buen clase. Es un buena clase. Es un buena clase. I think it is Es un buen clase. Is that correct? Second question- The term pelota refers to any kind of sports ball. Pelota is a ball but what

    asked by Shelby
  236. geometry

    the diagonals of a rhombus have the lengths 6 and 8 centimeters. whats the number of centimeters of the perimeter of the rhombus?

    asked by sam
  237. algebra

    brad wants to buy flowers for his friend with $21. The daises are $2 each and the roses are $3 dollars each.He buys 3 more daisies then roses. how much did the roses cost?

    asked by please please help!
  238. Cal II

    Intergral (27-9x^2)^(1/2) fit to theorem (a^2-u^2)^(1/2)

    asked by Michelle